深入浅出Android dmabuf_dump工具
目录
dmabuf是什么？
dmabuf_dump工具介绍(基于Android 14)
Android.bp
dmabuf_dump.cpp
整体架构结构如下
dmabuf_dump主要包含以下功能
前置背景知识
fdinfo
思考
bufinfo
Dump整个手机系统的dmabuf
Dump某个进程的dmabuf
以Table[buffer x process]方式呈现dmabuf
Dump整个系统DMA-BUF per-buffer, per-exporter and per-device statistics
DMA_BUF 在内核中的实现
dmabuf_dump原理分析
源码路径：
DmaBuffer
主要成员变量
FD和Inode的关系
dump整个系统流程原理
ReadDmaBufFdRefs
AddFdRef
ReadDmaBufMapRefs
AddMapRef
dmabuf_dump
dmabuf_dump -a
dmabuf_dump -b
代码流程
dmabuf的运用
实例分析
背景
解决方案
加tracepoint
tracepoint实现patch
使用simpleperf抓取dmabuf申请点所有backtrace
举例
Provider进程基于vendor.qti.hardware.display.allocator-service申请驻留分析
dmabuf是什么？
可以参考我之前写的一篇文章，在这篇文章中有介绍dma_buf：BufferManager_驱动的buffermanager-CSDN博客
dmabuf_dump工具介绍(基于Android 14)
dmabuf_dump是一个可执行文件，接收参数调用libdmabufinfo.a的接口完成dump功能，源码在：system/memory/libmeminfo/libdmabufinfo/tools/
安卓源代码目录下主要有下面2个文件，一个 Android.bp ，一个是 dmabuf_dump.cpp
Android.bp
// Copyright (C) 2019 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package {
default_applicable_licenses: ["Android-Apache-2.0"],
}
cc_binary {
name: "dmabuf_dump",
cflags: [
"-Wall",
"-Werror",
],
srcs: ["dmabuf_dump.cpp"],
shared_libs: [
"libbase",
],
static_libs: [
"libdmabufinfo",
],
vendor_available: true,
}dmabuf_dump.cpp
xref: /mivendor_u_sm8650/system/memory/libmeminfo/libdmabufinfo/tools/dmabuf_dump.cpp (revision unknown)
HomeHistoryAnnotateLine# Scopes# Navigate#Raw Download
current directory
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include 整体架构结构如下
dmabuf_dump主要包含以下功能
- Dump整个系统DMA-BUF per-buffer, per-exporter and per-device statistics(dmabuf_dump -b)，在kernel版本>= 5.10上生效。
- Dump整个系统的dmabuf info (dmabuf_dump)
- Dump某个PID的dmabuf info (dmabuf_dump )
- 以Table[buffer x process]方式呈现dmabuf info (dmabuf_dump -a)
前置背景知识
- Rss的含义：是当前段实际加载到物理内存中的大小。
- Pss 指的是：进程按比例分配当前段所占物理内存的大小。
- 下面dump整个手机系统在某一时刻的 dmabuf信息，可以看到有 binder进程的dmabuf信息、surfaceflinger进程的dmabuf信息、system_server进程的dmabuf信息等等。
- nr_procs是指有多少个进程在使用这块dmabuf。
- Name是指dmabuf的名字
- Inode是这块 dmabuf的唯一标识，注意Inode是全局唯一的。
- PROCESS TOTAL 是统计 Rss 或者 Pss的总和。
- dmabuf total 是整个系统dambuf的总和
- userspace_rss 是用户空间 rss的总和。
- userspace_pss 是用户空间 pss的总和。
- kernel_rss 目前初步认为是 内核空间rss的总和，但不特别准确，这个kernel_rss大有来头，后面有时间详细深度剖析。真实的项目过程中，会偶先 kernel_rss占用过大，或泄露的情况，这种问题还特别难分析和解决。
fdinfo
/proc/
- count
- exp_name，有exp_name则表示是 dmabuf 的file。
- name
- size
- ino：inode
以下是camera provider的 fdinfo
wj@wj:~/Downloads$ adb shell ps -e | grep camera
cameraserver 1601 1 14307344 680656 binder_ioctl_write_read 0 S vendor.qti.camera.provider-service_64
cameraserver 2785 1 2720288 25620 binder_ioctl_write_read 0 S cameraserver
u0_a139 11065 1444 9305388 343752 do_epoll_wait 0 S com.android.camera
wj@wj:~/Downloads$ adb shell
aurora:/ # cd /proc/1601/fdinfo/
aurora:/proc/1601/fdinfo # ls
0 110 1137 117 123 15 19 22 26 3 33 36 383 399 406 43 47 50 54 56 6 63 67 7 73 745 751 79 82 899
1 111 114 118 124 16 2 23 27 30 336 37 384 4 407 44 48 51 55 57 60 64 68 70 731 748 76 8 84 9
10 112 115 121 13 17 20 24 28 31 34 38 386 40 41 45 49 52 557 58 61 65 687 71 74 75 77 80 85
11 113 116 122 14 18 21 25 29 32 35 382 39 400 42 46 5 53 558 59 62 66 69 72 743 750 78 81 86
可以看到 fdinfo 有以下这些：
aurora:/proc/1601/fdinfo # ls
0 110 1137 117 123 15 19 22 26 3 33 36 383 399 406 43 47 50 54 56 6 63 67 7 73 745 751 79 82 899
1 111 114 118 124 16 2 23 27 30 336 37 384 4 407 44 48 51 55 57 60 64 68 70 731 748 76 8 84 9
10 112 115 121 13 17 20 24 28 31 34 38 386 40 41 45 49 52 557 58 61 65 687 71 74 75 77 80 85
11 113 116 122 14 18 21 25 29 32 35 382 39 400 42 46 5 53 558 59 62 66 69 72 743 750 78 81 86思考
我们知道每一个进程都有一个 fd，用户空间不同进程的 fd，是可以共享内核空间的同一块 dmabuf的，那么怎么样找到进程 fd 和对应 dmabuf的对应关系呢？
那么这个时候 inode 就要出场了，因为 dmabuf的inode是唯一确定的，所以这个时候我们可以把同一时刻的，这个进程的 dmabuf_dump给 dump下来，如下所示。
wj@wj:~$ adb shell ps -e | grep camera
cameraserver 1601 1 14307344 680656 binder_ioctl_write_read 0 S vendor.qti.camera.provider-service_64
cameraserver 2785 1 2720288 25620 binder_ioctl_write_read 0 S cameraserver
u0_a139 11065 1444 9305388 343752 do_epoll_wait 0 S com.android.camera
wj@wj:~$ adb shell dmabuf_dump 1601
vendor.qti.came:1601
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 134
system 4 kB 4 kB 1 135
system 4 kB 4 kB 1 723
system 4 kB 4 kB 1 724
system 4 kB 4 kB 1 725
system 4320 kB 4320 kB 1 727
system 736 kB 736 kB 1 729
system 148 kB 148 kB 1 731
system 32768 kB 32768 kB 1 733
system 4 kB 4 kB 1 996
system 4 kB 4 kB 1 1010
system 4 kB 4 kB 1 1011
system 736 kB 736 kB 1 1017
system 148 kB 148 kB 1 1019
system 6848 kB 6848 kB 1 1342
system 1024 kB 1024 kB 1 1359
system 32768 kB 32768 kB 1 1363
system 4 kB 4 kB 1 1367
system 4 kB 4 kB 1 1371
system 4 kB 4 kB 1 1372
PROCESS TOTAL 79540 kB 79540 kB
----------------------
dmabuf total: 298652 kB kernel_rss: 219112 kB userspace_rss: 79540 kB userspace_pss: 79540 kB然后我们可以用 grep -nr 命令进行查看，如下所示：
aurora:/proc/1601/fdinfo # grep -nr 733
./124:4:ino: 733
aurora:/proc/1601/fdinfo # grep -nr 1372
./751:4:ino: 1372
inode为733的dmabuf 所对应的进程为：124
inode为1372的dmabuf所对应的进程为：751
bufinfo
我们可以通过获取 bufferinfo 来获取 dmabuf的详细信息。
adb shell cat /sys/kernel/debug/dma_buf/bufinfo
wj@wj:~/Downloads$ adb shell cat /sys/kernel/debug/dma_buf/bufinfo
Dma-buf Objects:
size flags mode count exp_name ino name
00032768 00000002 00080007 00000002 qcom,system 00002275 qcom,system
Attached Devices:
Total 0 devices attached
00770048 00000002 00080007 00000001 qcom,system 00002274 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002273 qcom,system
Attached Devices:
Total 0 devices attached
00770048 00000002 00080007 00000001 qcom,system 00002272 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002271 qcom,system
Attached Devices:
Total 0 devices attached
00770048 00000002 00080007 00000001 qcom,system 00002270 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000004 qcom,system 00002269 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000004 qcom,system 00002268 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002267 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000001 qcom,system 00002266 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002265 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000001 qcom,system 00002264 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00002263 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000001 qcom,system 00002262 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000004 qcom,system 00002261 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000004 qcom,system 00002260 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00002249 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000003 qcom,system 00002248 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00032768 00000002 00080007 00000004 qcom,system 00002188 qcom,system
Attached Devices:
Total 0 devices attached
10444800 00000002 00080007 00000003 qcom,system 00002187 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002039 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002034 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002033 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
33554432 00000002 00080007 00000003 system 00002029 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00151552 00000002 00080007 00000003 system 00002025 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00106496 00000002 00080007 00000002 system 00002018 system
Attached Devices:
Total 0 devices attached
00753664 00000002 00080007 00000003 system 00002017 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
07012352 00000002 00080007 00000003 system 00002008 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002005 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00002004 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00001958 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb5
Total 1 devices attached
00032768 00000002 00080007 00000002 qcom,system 00001953 qcom,system
Attached Devices:
Total 0 devices attached
10444800 00000002 00080007 00000001 qcom,system 00001952 qcom,system
Attached Devices:
Total 0 devices attached
00032768 00000002 00080007 00000002 qcom,system 00001502 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000002 qcom,system 00001501 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00073728 00000002 00080007 00000002 qcom,system 00001460 qcom,system
Attached Devices:
Total 0 devices attached
02506752 00000002 00080007 00000002 qcom,system 00001459 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00001372 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00001371 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00001367 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
33554432 00000002 00080007 00000003 system 00001363 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
01048576 00000002 00080007 00000003 system 00001359 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
07012352 00000002 00080007 00000003 system 00001342 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00151552 00000002 00080007 00000003 system 00001019 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00753664 00000002 00080007 00000003 system 00001017 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00001011 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00001010 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00000996 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb4
Total 1 devices attached
33554432 00000002 00080007 00000003 system 00000733 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00151552 00000002 00080007 00000003 system 00000731 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00753664 00000002 00080007 00000003 system 00000729 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
04423680 00000002 00080007 00000003 system 00000727 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00000725 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000724 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00000723 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb3
Total 1 devices attached
00032768 00000002 00080007 00000002 qcom,system 00000669 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000002 qcom,system 00000668 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000665 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000005 qcom,system 00000664 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000663 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000004 qcom,system 00000662 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000343 qcom,system
Attached Devices:
Total 0 devices attached
00491520 00000002 00080007 00000004 qcom,system 00000342 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000341 qcom,system
Attached Devices:
Total 0 devices attached
00491520 00000002 00080007 00000004 qcom,system 00000340 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000339 qcom,system
Attached Devices:
Total 0 devices attached
00491520 00000002 00080007 00000004 qcom,system 00000338 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000337 qcom,system
Attached Devices:
Total 0 devices attached
00491520 00000002 00080007 00000004 qcom,system 00000336 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000002 qcom,system 00000321 qcom,system
Attached Devices:
Total 0 devices attached
00131072 00000002 00080007 00000003 qcom,system 00000320 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000319 qcom,system
Attached Devices:
Total 0 devices attached
00212992 00000002 00080007 00000004 qcom,system 00000318 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000317 qcom,system
Attached Devices:
Total 0 devices attached
00212992 00000002 00080007 00000004 qcom,system 00000316 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000315 qcom,system
Attached Devices:
Total 0 devices attached
00212992 00000002 00080007 00000004 qcom,system 00000314 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000313 qcom,system
Attached Devices:
Total 0 devices attached
00212992 00000002 00080007 00000004 qcom,system 00000312 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000311 qcom,system
Attached Devices:
Total 0 devices attached
00352256 00000002 00080007 00000004 qcom,system 00000310 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000309 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000308 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000307 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000306 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000305 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000304 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000303 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000302 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000293 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000292 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000291 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000290 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000289 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000288 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000286 qcom,system
Attached Devices:
Total 0 devices attached
00974848 00000002 00080007 00000004 qcom,system 00000285 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000258 qcom,system
Attached Devices:
Total 0 devices attached
00352256 00000002 00080007 00000004 qcom,system 00000257 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000220 qcom,system
Attached Devices:
Total 0 devices attached
00393216 00000002 00080007 00000004 qcom,system 00000219 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000218 qcom,system
Attached Devices:
Total 0 devices attached
00393216 00000002 00080007 00000004 qcom,system 00000217 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000216 qcom,system
Attached Devices:
Total 0 devices attached
00393216 00000002 00080007 00000004 qcom,system 00000215 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000214 qcom,system
Attached Devices:
Total 0 devices attached
00393216 00000002 00080007 00000004 qcom,system 00000213 qcom,system
Attached Devices:
kgsl-3d0
kgsl-3d0
Total 2 devices attached
00020480 00000002 00080007 00000003 qcom,system 00000172 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,system 00000171 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,system 00000170 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
Total 1 devices attached
00032768 00000002 00080007 00000002 qcom,system 00000167 qcom,system
Attached Devices:
Total 0 devices attached
14745600 00000002 00080007 00000003 qcom,system 00000166 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
Total 1 devices attached
02097152 00000002 00080007 00000002 qcom,qseecom 00000165 qcom,qseecom
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000002 qcom,qseecom 00000164 qcom,qseecom
Attached Devices:
Total 0 devices attached
00012288 00000002 00080007 00000002 qcom,qseecom 00000162 qcom,qseecom
Attached Devices:
Total 0 devices attached
00262144 00000002 00080007 00000003 system 00000160 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb1
Total 1 devices attached
00004096 00000002 00080007 00000003 system 00000158 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb1
Total 1 devices attached
00262144 00000002 00080007 00000003 system 00000157 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb10
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00000156 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000155 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb10
Total 1 devices attached
00032768 00000002 00080007 00000003 system 00000154
Attached Devices:
soc:spf_core_platform:qcom,msm-audio-ion
Total 1 devices attached
00032768 00000002 00080007 00000004 qcom,system 00000153 qcom,system
Attached Devices:
Total 0 devices attached
10522624 00000002 00080007 00000005 qcom,system 00000152 qcom,system
Attached Devices:
soc:qcom,smmu_sde_unsec_cb
kgsl-3d0
Total 2 devices attached
00004096 00000002 00080007 00000002 system 00000135 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000134 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb11
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00000079 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000078 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb12
Total 1 devices attached
00032768 00000002 00080007 00000002 qcom,system 00000074 qcom,system
Attached Devices:
Total 0 devices attached
00065536 00000002 00080007 00000002 qcom,system 00000073 qcom,system
Attached Devices:
kgsl-3d0
Total 1 devices attached
00004096 00000002 00080007 00000002 system 00000072 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000071 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb11
Total 1 devices attached
00004096 00000002 00080007 00000002 qcom,qseecom 00000057 qcom,qseecom
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000002 system 00000048 system
Attached Devices:
Total 0 devices attached
00004096 00000002 00080007 00000003 system 00000047 system
Attached Devices:
soc:qcom,msm_fastrpc:qcom,msm_fastrpc_compute_cb2
Total 1 devices attached
00008192 00000002 00080007 00000002 qcom,qseecom 00000046 qcom,qseecom
Attached Devices:
Total 0 devices attached
00008192 00000002 00080007 00000002 qcom,qseecom 00000045 qcom,qseecom
Attached Devices:
Total 0 devices attached
01200128 00000002 00080007 00000001 qcom,system 00000043
Attached Devices:
soc:qcom,cam_smmu:msm_cam_smmu_icp
Total 1 devices attached
00024576 00000002 00080007 00000002 qcom,qseecom 00000036 qcom,qseecom
Attached Devices:
Total 0 devices attached
01048576 00000000 00080005 00000001 qcom,system 00000018
Attached Devices:
ab00000.qcom,cvp:cvp_non_secure_cb
Total 1 devices attached
03141632 00000000 00080005 00000001 qcom,system 00000017
Attached Devices:
ab00000.qcom,cvp:cvp_non_secure_cb
Total 1 devices attached
00004096 00000002 00080007 00000002 qcom,qseecom 00000016 qcom,qseecom
Attached Devices:
Total 0 devices attached
00028672 00000002 00080007 00000003 qcom,qseecom 00000013 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00004096 00000002 00080007 00000003 qcom,qseecom 00000012 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00028672 00000002 00080007 00000003 qcom,qseecom 00000011 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000010 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00516096 00000002 00080007 00000003 qcom,qseecom 00000009 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000008 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000007 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000006 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00020480 00000002 00080007 00000003 qcom,qseecom 00000005 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00028672 00000002 00080007 00000003 qcom,qseecom 00000004 qcom,qseecom
Attached Devices:
firmware:qcom_smcinvoke
Total 1 devices attached
00004096 00000000 00080005 00000001 qcom,system 00000003
Attached Devices:
aa00000.qcom,vidc:non_secure_cb
Total 1 devices attached
00004096 00000000 00080005 00000001 qcom,system 00000002
Attached Devices:
aa00000.qcom,vidc:non_secure_cb
Total 1 devices attached
03133440 00000000 00080005 00000001 qcom,system 00000001
Attached Devices:
aa00000.qcom,vidc:non_secure_cb
Total 1 devices attached
Total 154 objects, 305819648 bytes
可以看到有更多的dmabuf信息输出：size 、 flags、Attached Devices、mode 、count 、exp_name 、ino 、name
Dump整个手机系统的dmabuf
wj@wj:~/Downloads$ adb shell
aurora:/ # dmabuf_dump
binder:3072_2:3072
Name Rss Pss nr_procs Inode
qcom,qseecom 12 kB 12 kB 1 160
PROCESS TOTAL 12 kB 12 kB
----------------------
mfp-daemon:3041
Name Rss Pss nr_procs Inode
qcom,qseecom 4 kB 4 kB 1 163
qcom,qseecom 2048 kB 2048 kB 1 164
PROCESS TOTAL 2052 kB 2052 kB
----------------------
cdsprpcd:2824
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 139
system 256 kB 256 kB 1 141
system 104 kB 104 kB 1 1994
PROCESS TOTAL 364 kB 364 kB
----------------------
binder:1817_2:1817
Name Rss Pss nr_procs Inode
qcom,qseecom 8 kB 8 kB 1 37
PROCESS TOTAL 8 kB 8 kB
----------------------
.android.camera:8920
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 1979
system 4 kB 4 kB 1 1987
system 4 kB 4 kB 1 1988
system 6848 kB 6848 kB 1 1990
system 736 kB 736 kB 1 1993
system 148 kB 148 kB 1 1996
system 32768 kB 32768 kB 1 1997
system 4 kB 4 kB 1 2000
system 4 kB 4 kB 1 2001
system 4 kB 4 kB 1 2002
qcom,system 2392 kB 2392 kB 1 2415
qcom,system 72 kB 72 kB 1 2416
qcom,system 2448 kB 2448 kB 1 2636
qcom,system 72 kB 72 kB 1 2637
PROCESS TOTAL 45508 kB 45508 kB
----------------------
iui.miwallpaper:4872
Name Rss Pss nr_procs Inode
qcom,system 10276 kB 5138 kB 2 3711
qcom,system 32 kB 16 kB 2 3712
qcom,system 10276 kB 5138 kB 2 3723
qcom,system 32 kB 16 kB 2 3724
PROCESS TOTAL 20616 kB 10308 kB
----------------------
fidoca:1813
Name Rss Pss nr_procs Inode
qcom,qseecom 24 kB 24 kB 1 25
PROCESS TOTAL 24 kB 24 kB
----------------------
binder:1808_2:1808
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 43
system 4 kB 4 kB 1 44
PROCESS TOTAL 8 kB 8 kB
----------------------
binder:3079_2:3079
Name Rss Pss nr_procs Inode
qcom,system 14400 kB 14400 kB 1 165
qcom,system 32 kB 32 kB 1 166
PROCESS TOTAL 14432 kB 14432 kB
----------------------
android.hardwar:1607
Name Rss Pss nr_procs Inode
qcom,qseecom 4 kB 4 kB 1 22
PROCESS TOTAL 4 kB 4 kB
----------------------
surfaceflinger:1929
Name Rss Pss nr_procs Inode
qcom,system 64 kB 64 kB 1 71
qcom,system 32 kB 32 kB 1 72
qcom,system 10276 kB 5138 kB 2 133
qcom,system 32 kB 16 kB 2 134
qcom,system 384 kB 192 kB 2 225
qcom,system 32 kB 16 kB 2 226
qcom,system 384 kB 192 kB 2 227
qcom,system 32 kB 16 kB 2 228
qcom,system 384 kB 192 kB 2 229
qcom,system 32 kB 16 kB 2 230
qcom,system 384 kB 192 kB 2 231
qcom,system 32 kB 16 kB 2 232
qcom,system 344 kB 172 kB 2 247
qcom,system 32 kB 16 kB 2 248
qcom,system 952 kB 476 kB 2 292
qcom,system 32 kB 16 kB 2 293
qcom,system 952 kB 476 kB 2 298
qcom,system 32 kB 16 kB 2 299
qcom,system 952 kB 476 kB 2 302
qcom,system 32 kB 16 kB 2 303
qcom,system 952 kB 476 kB 2 304
qcom,system 32 kB 16 kB 2 305
qcom,system 952 kB 476 kB 2 308
qcom,system 32 kB 16 kB 2 309
qcom,system 952 kB 476 kB 2 310
qcom,system 32 kB 16 kB 2 311
qcom,system 952 kB 476 kB 2 312
qcom,system 32 kB 16 kB 2 313
qcom,system 952 kB 476 kB 2 314
qcom,system 32 kB 16 kB 2 315
qcom,system 344 kB 172 kB 2 323
qcom,system 32 kB 16 kB 2 324
qcom,system 208 kB 104 kB 2 325
qcom,system 32 kB 16 kB 2 326
qcom,system 208 kB 104 kB 2 327
qcom,system 32 kB 16 kB 2 328
qcom,system 208 kB 104 kB 2 329
qcom,system 32 kB 16 kB 2 330
qcom,system 208 kB 104 kB 2 331
qcom,system 32 kB 16 kB 2 332
qcom,system 128 kB 128 kB 1 333
qcom,system 32 kB 32 kB 1 334
qcom,system 480 kB 240 kB 2 349
qcom,system 32 kB 16 kB 2 350
qcom,system 480 kB 240 kB 2 351
qcom,system 32 kB 16 kB 2 352
qcom,system 480 kB 240 kB 2 353
qcom,system 32 kB 16 kB 2 354
qcom,system 480 kB 240 kB 2 355
qcom,system 32 kB 16 kB 2 356
qcom,system 10276 kB 5138 kB 2 645
qcom,system 32 kB 16 kB 2 646
qcom,system 10276 kB 5138 kB 2 647
qcom,system 32 kB 16 kB 2 648
qcom,system 10276 kB 10276 kB 1 829
qcom,system 32 kB 32 kB 1 830
qcom,system 10276 kB 10276 kB 1 2694
qcom,system 32 kB 32 kB 1 2695
qcom,system 10276 kB 5138 kB 2 3711
qcom,system 32 kB 16 kB 2 3712
qcom,system 10276 kB 5138 kB 2 3723
qcom,system 32 kB 16 kB 2 3724
qcom,system 10276 kB 5138 kB 2 3731
qcom,system 32 kB 16 kB 2 3732
PROCESS TOTAL 96016 kB 58444 kB
----------------------
mrmd:1809
Name Rss Pss nr_procs Inode
qcom,qseecom 8 kB 8 kB 1 27
PROCESS TOTAL 8 kB 8 kB
----------------------
binder:1671_2:1671
Name Rss Pss nr_procs Inode
qcom,system 10276 kB 5138 kB 2 133
qcom,system 32 kB 16 kB 2 134
qcom,system 20 kB 20 kB 1 169
qcom,system 20 kB 20 kB 1 170
qcom,system 20 kB 20 kB 1 171
qcom,system 10276 kB 5138 kB 2 645
qcom,system 32 kB 16 kB 2 646
qcom,system 10276 kB 5138 kB 2 647
qcom,system 32 kB 16 kB 2 648
PROCESS TOTAL 30984 kB 15522 kB
----------------------
vendor.qti.came:1650
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 142
system 4 kB 4 kB 1 143
system 4 kB 4 kB 1 1180
system 4 kB 4 kB 1 1194
system 4 kB 4 kB 1 1195
system 736 kB 736 kB 1 1201
system 148 kB 148 kB 1 1203
system 6848 kB 6848 kB 1 1601
system 1024 kB 1024 kB 1 1620
system 32768 kB 32768 kB 1 1621
system 4 kB 4 kB 1 1625
system 4 kB 4 kB 1 1627
system 4 kB 4 kB 1 1628
PROCESS TOTAL 41556 kB 41556 kB
----------------------
adsprpcd:2822
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 136
system 4 kB 4 kB 1 137
system 256 kB 256 kB 1 138
PROCESS TOTAL 264 kB 264 kB
----------------------
system_server:2293
Name Rss Pss nr_procs Inode
qcom,system 10200 kB 5100 kB 2 3693
qcom,system 32 kB 16 kB 2 3694
PROCESS TOTAL 10232 kB 5116 kB
----------------------
ndroid.systemui:5329
Name Rss Pss nr_procs Inode
qcom,system 952 kB 476 kB 2 292
qcom,system 32 kB 16 kB 2 293
qcom,system 952 kB 476 kB 2 298
qcom,system 32 kB 16 kB 2 299
qcom,system 952 kB 476 kB 2 302
qcom,system 32 kB 16 kB 2 303
qcom,system 952 kB 476 kB 2 304
qcom,system 32 kB 16 kB 2 305
qcom,system 952 kB 476 kB 2 308
qcom,system 32 kB 16 kB 2 309
qcom,system 952 kB 476 kB 2 310
qcom,system 32 kB 16 kB 2 311
qcom,system 952 kB 476 kB 2 312
qcom,system 32 kB 16 kB 2 313
qcom,system 952 kB 476 kB 2 314
qcom,system 32 kB 16 kB 2 315
qcom,system 208 kB 104 kB 2 325
qcom,system 32 kB 16 kB 2 326
qcom,system 208 kB 104 kB 2 327
qcom,system 32 kB 16 kB 2 328
qcom,system 208 kB 104 kB 2 329
qcom,system 32 kB 16 kB 2 330
qcom,system 208 kB 104 kB 2 331
qcom,system 32 kB 16 kB 2 332
qcom,system 480 kB 240 kB 2 349
qcom,system 32 kB 16 kB 2 350
qcom,system 480 kB 240 kB 2 351
qcom,system 32 kB 16 kB 2 352
qcom,system 480 kB 240 kB 2 353
qcom,system 32 kB 16 kB 2 354
qcom,system 480 kB 240 kB 2 355
qcom,system 32 kB 16 kB 2 356
qcom,system 752 kB 752 kB 1 463
qcom,system 32 kB 32 kB 1 464
qcom,system 752 kB 752 kB 1 465
qcom,system 32 kB 32 kB 1 466
qcom,system 752 kB 752 kB 1 467
qcom,system 32 kB 32 kB 1 468
qcom,system 10276 kB 10276 kB 1 3725
qcom,system 32 kB 32 kB 1 3726
qcom,system 10276 kB 10276 kB 1 3727
qcom,system 32 kB 32 kB 1 3728
qcom,system 10276 kB 10276 kB 1 3729
qcom,system 32 kB 32 kB 1 3730
qcom,system 10276 kB 5138 kB 2 3731
qcom,system 32 kB 16 kB 2 3732
qcom,system 752 kB 752 kB 1 3733
qcom,system 32 kB 32 kB 1 3734
qcom,system 752 kB 752 kB 1 3735
qcom,system 32 kB 32 kB 1 3736
qcom,system 752 kB 752 kB 1 3737
qcom,system 32 kB 32 kB 1 3738
PROCESS TOTAL 56816 kB 46222 kB
----------------------
sscrpcd:1281
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 76
system 4 kB 4 kB 1 77
PROCESS TOTAL 8 kB 8 kB
----------------------
binder:1589_2:1589
Name Rss Pss nr_procs Inode
32 kB 32 kB 1 135
PROCESS TOTAL 32 kB 32 kB
----------------------
com.miui.home:5380
Name Rss Pss nr_procs Inode
qcom,system 384 kB 192 kB 2 225
qcom,system 32 kB 16 kB 2 226
qcom,system 384 kB 192 kB 2 227
qcom,system 32 kB 16 kB 2 228
qcom,system 384 kB 192 kB 2 229
qcom,system 32 kB 16 kB 2 230
qcom,system 384 kB 192 kB 2 231
qcom,system 32 kB 16 kB 2 232
qcom,system 344 kB 172 kB 2 247
qcom,system 32 kB 16 kB 2 248
qcom,system 344 kB 172 kB 2 323
qcom,system 32 kB 16 kB 2 324
qcom,system 10200 kB 10200 kB 1 3665
qcom,system 32 kB 32 kB 1 3666
qcom,system 10200 kB 5100 kB 2 3693
qcom,system 32 kB 16 kB 2 3694
PROCESS TOTAL 22880 kB 16556 kB
----------------------
qseecomd:1079
Name Rss Pss nr_procs Inode
qcom,qseecom 28 kB 28 kB 1 1
qcom,qseecom 20 kB 20 kB 1 2
qcom,qseecom 20 kB 20 kB 1 3
qcom,qseecom 20 kB 20 kB 1 4
qcom,qseecom 20 kB 20 kB 1 5
qcom,qseecom 504 kB 504 kB 1 6
qcom,qseecom 20 kB 20 kB 1 7
qcom,qseecom 28 kB 28 kB 1 8
qcom,qseecom 4 kB 4 kB 1 9
qcom,qseecom 28 kB 28 kB 1 10
PROCESS TOTAL 692 kB 692 kB
----------------------
tee-supplicant:1525
Name Rss Pss nr_procs Inode
qcom,qseecom 4 kB 4 kB 1 16
PROCESS TOTAL 4 kB 4 kB
----------------------
audioadsprpcd:490
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 79
system 4 kB 4 kB 1 80
PROCESS TOTAL 8 kB 8 kB
----------------------
dmabuf total: 265484 kB kernel_rss: 8332 kB userspace_rss: 342528 kB userspace_pss: 257152 kB Dump某个进程的dmabuf
下面Dump Camera Provider进程的dmabuf使用情况。
wj@wj:~/Downloads$ adb shell ps -e | grep camera
cameraserver 1650 1 14121844 661800 binder_ioctl_write_read 0 S vendor.qti.camera.provider-service_64
cameraserver 2691 1 3069520 23404 binder_ioctl_write_read 0 S cameraserver
u0_a139 8920 1478 9591760 333440 do_epoll_wait 0 S com.android.camera
wj@wj:~/Downloads$ adb shell dmabuf_dump 1650
vendor.qti.came:1650
Name Rss Pss nr_procs Inode
system 4 kB 4 kB 1 142
system 4 kB 4 kB 1 143
system 4 kB 4 kB 1 1180
system 4 kB 4 kB 1 1194
system 4 kB 4 kB 1 1195
system 736 kB 736 kB 1 1201
system 148 kB 148 kB 1 1203
system 6848 kB 6848 kB 1 1601
system 1024 kB 1024 kB 1 1620
system 32768 kB 32768 kB 1 1621
system 4 kB 4 kB 1 1625
system 4 kB 4 kB 1 1627
system 4 kB 4 kB 1 1628
PROCESS TOTAL 41556 kB 41556 kB
----------------------
dmabuf total: 265484 kB kernel_rss: 223928 kB userspace_rss: 41556 kB userspace_pss: 41556 kB
以Table[buffer x process]方式呈现dmabuf
注意，该方式只能看整个系统的dambuf
wj@wj:~/Downloads$ adb shell
aurora:/ # dmabuf_dump -a
Dmabuf Inode | Size | Fd Ref Counts | Map Ref Counts | audioadsprpcd:499 | qseecomd:1012 | sscrpcd:1254 | tee-supplicant:1491 | binder:1548_2:1548 | android.hardwar:1568 | vendor.qti.came:1601 | binder:1611_2:1611 | binder:1734_2:1734 | mrmd:1735 | fidoca:1743 | binder:1750_2:1750 | surfaceflinger:1846 | adsprpcd:2891 | cdsprpcd:2895 | mfp-daemon:3096 | binder:3104_2:3104 | binder:3118_2:3118 | iui.miwallpaper:4832 | ndroid.systemui:5265 | com.miui.home:5302 |
78 | 4 kB | 1 | 1 | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
79 | 4 kB | 1 | 1 | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
4 | 28 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
5 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
6 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
7 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
8 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
9 | 504 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
10 | 20 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
11 | 28 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
12 | 4 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
13 | 28 kB | 1 | 0 | -- | 2( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
71 | 4 kB | 1 | 1 | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
72 | 4 kB | 1 | 1 | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
16 | 4 kB | 1 | 1 | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
154 | 32 kB | 1 | 1 | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
57 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
134 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
135 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
170 | 20 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
171 | 20 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
172 | 20 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
152 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | 2( 0) refs | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- |
153 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
47 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
48 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
46 | 8 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
36 | 24 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
45 | 8 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- | -- |
62 | 18500 kB | 1 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- |
63 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
64 | 18500 kB | 1 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- |
65 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
73 | 64 kB | 1 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | -- |
74 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
320 | 128 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
215 | 384 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
213 | 384 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
214 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
216 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
217 | 384 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
218 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
219 | 384 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
220 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
257 | 344 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
258 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
285 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
286 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
302 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
303 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
321 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | -- |
310 | 344 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs |
311 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs |
292 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
293 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
308 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
309 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
318 | 208 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
319 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
328 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
329 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
342 | 480 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
343 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
326 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
327 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
348 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- |
349 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- |
316 | 208 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
317 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
340 | 480 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
341 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
324 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
325 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
314 | 208 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
315 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
322 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
323 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
338 | 480 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
339 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
312 | 208 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
313 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
332 | 752 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
333 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
330 | 752 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
331 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
336 | 480 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
334 | 752 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
335 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
337 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
288 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
289 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
290 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
291 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
306 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
307 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
433 | 10276 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- |
434 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- |
304 | 952 kB | 2 | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- | -- | -- | -- | -- | -- | 1( 0) refs | -- |
305 | 32 kB | 2 | 2 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- |
155 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- |
156 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- |
157 | 256 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- | -- |
158 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- |
159 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- |
160 | 256 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- | -- |
164 | 4 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- |
165 | 2048 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- | -- |
162 | 12 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- | -- |
166 | 14400 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- |
167 | 32 kB | 1 | 1 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | 1( 1) refs | -- | -- | -- |
------------------------------------
TOTALS 143012 kB | n/a | n/a | 8 kB | 692 kB | 8 kB | 4 kB | 32 kB | 4 kB | 8 kB | 10368 kB | 8 kB | 8 kB | 24 kB | 8 kB | 125124 kB | 264 kB | 264 kB | 2052 kB | 12 kB | 14432 kB | 20616 kB | 54464 kB | 2416 kB |
上述dump说明：
- Fd Ref Counts ：表示该FD有多少个进程在引用
- Map Ref Counts：表示该FD当前有多少个进程已经做过Map
- FD( Map) refs : 该进程持有该Buffer的参考计数的总数量以及Map的总次数
Dump整个系统DMA-BUF per-buffer, per-exporter and per-device statistics
在kernel版本>= 5.10上生效。
执行：dmabuf_dump -b
会从sysfs(/sys/kernel/dmabuf/buffers)中dump dmabuf统计信息，显示如下内容：
wj@wj:~/Downloads$ adb shell
aurora:/ # dmabuf_dump -b
----------------------- DMA-BUF per-buffer stats -----------------------
Dmabuf Inode | Size(bytes) | Exporter Name |
2262 |10522624 | qcom,system
2017 |753664 | system
1372 |4096 | system
315 |32768 | qcom,system
17 |3141632 | qcom,system
343 |32768 | qcom,system
220 |32768 | qcom,system
164 |4096 | qcom,qseecom
45 |8192 | qcom,qseecom
305 |32768 | qcom,system
73 |65536 | qcom,system
154 |32768 | system
663 |32768 | qcom,system
7 |20480 | qcom,qseecom
2270 |770048 | qcom,system
2025 |151552 | system
1342 |7012352 | system
2260 |10522624 | qcom,system
172 |20480 | qcom,system
313 |32768 | qcom,system
257 |352256 | qcom,system
134 |4096 | system
341 |32768 | qcom,system
285 |974848 | qcom,system
219 |393216 | qcom,system
162 |12288 | qcom,qseecom
2005 |4096 | system
43 |1200128 | qcom,system
303 |32768 | qcom,system
2033 |4096 | system
1501 |10522624 | qcom,system
71 |4096 | system
152 |10522624 | qcom,system
5 |20480 | qcom,qseecom
2269 |32768 | qcom,system
321 |32768 | qcom,system
1010 |4096 | system
293 |32768 | qcom,system
170 |20480 | qcom,system
311 |32768 | qcom,system
13 |28672 | qcom,qseecom
217 |393216 | qcom,system
2249 |32768 | qcom,system
160 |262144 | system
1359 |1048576 | system
1952 |10444800 | qcom,system
1019 |151552 | system
3 |4096 | qcom,system
2267 |32768 | qcom,system
291 |32768 | qcom,system
1367 |4096 | system
78 |4096 | system
11 |28672 | qcom,qseecom
338 |491520 | qcom,system
215 |393216 | qcom,system
2247 |32768 | qcom,system
724 |4096 | system
668 |10522624 | qcom,system
2275 |32768 | qcom,system
1017 |753664 | system
1 |3133440 | qcom,system
2265 |32768 | qcom,system
318 |212992 | qcom,system
167 |32768 | qcom,system
48 |4096 | system
308 |974848 | qcom,system
336 |491520 | qcom,system
213 |393216 | qcom,system
157 |262144 | system
996 |4096 | system
2273 |32768 | qcom,system
2263 |32768 | qcom,system
2018 |106496 | system
316 |212992 | qcom,system
18 |1048576 | qcom,system
288 |974848 | qcom,system
165 |2097152 | qcom,qseecom
2008 |7012352 | system
46 |8192 | qcom,qseecom
1363 |33554432 | system
306 |974848 | qcom,system
74 |32768 | qcom,system
155 |4096 | system
2187 |10444800 | qcom,system
664 |10522624 | qcom,system
36 |24576 | qcom,qseecom
8 |20480 | qcom,qseecom
2271 |32768 | qcom,system
2261 |32768 | qcom,system
1371 |4096 | system
314 |212992 | qcom,system
258 |32768 | qcom,system
135 |4096 | system
16 |4096 | qcom,qseecom
342 |491520 | qcom,system
286 |32768 | qcom,system
729 |753664 | system
304 |974848 | qcom,system
2034 |4096 | system
1502 |32768 | qcom,system
72 |4096 | system
153 |32768 | qcom,system
662 |10522624 | qcom,system
6 |20480 | qcom,qseecom
1011 |4096 | system
171 |20480 | qcom,system
312 |212992 | qcom,system
340 |491520 | qcom,system
218 |32768 | qcom,system
727 |4423680 | system
2004 |4096 | system
302 |974848 | qcom,system
1953 |32768 | qcom,system
4 |28672 | qcom,qseecom
2268 |10522624 | qcom,system
320 |131072 | qcom,system
292 |974848 | qcom,system
310 |352256 | qcom,system
79 |4096 | system
12 |4096 | qcom,qseecom
339 |32768 | qcom,system
216 |32768 | qcom,system
2248 |10522624 | qcom,system
725 |4096 | system
669 |32768 | qcom,system
2 |4096 | qcom,system
2266 |10522624 | qcom,system
319 |32768 | qcom,system
1460 |73728 | qcom,system
290 |974848 | qcom,system
733 |33554432 | system
309 |32768 | qcom,system
2039 |4096 | system
10 |20480 | qcom,qseecom
337 |32768 | qcom,system
214 |32768 | qcom,system
2246 |10444800 | qcom,system
158 |4096 | system
723 |4096 | system
2274 |770048 | qcom,system
2029 |33554432 | system
2264 |10522624 | qcom,system
57 |4096 | qcom,qseecom
317 |32768 | qcom,system
1459 |2506752 | qcom,system
289 |32768 | qcom,system
166 |14745600 | qcom,system
731 |151552 | system
47 |4096 | system
307 |32768 | qcom,system
1958 |4096 | system
156 |4096 | system
2188 |32768 | qcom,system
665 |32768 | qcom,system
9 |516096 | qcom,qseecom
2272 |770048 | qcom,system
----------------------- DMA-BUF exporter stats -----------------------
Exporter Name | Total Count | Total Size(bytes) |
qcom,system | 95| 189779968
system | 43| 123645952
qcom,qseecom | 18| 2871296
----------------------- DMA-BUF total stats --------------------------
Total DMA-BUF count: 156, Total DMA-BUF size(bytes): 316297216DMA_BUF 在内核中的实现
源代码位置：kernel_platform/msm-kernel/drivers/dma-buf/
这篇文章不深入这块内容，后面有时间可以专门写文章进行深入分析。
dmabuf_dump原理分析
源码路径：
system/memory/libmeminfo/libdmabufinfo/
DmaBuffer
DmaBuffer结构体定义如下：
struct DmaBuffer {
public:
DmaBuffer(ino_t inode, uint64_t size, uint64_t count, const std::string& exporter,
const std::string& name)
: inode_(inode), size_(size), count_(count), exporter_(exporter), name_(name) {
total_refs_ = 0;
}
DmaBuffer() = default;
~DmaBuffer() = default;
// Adds one file descriptor reference for the given pid
void AddFdRef(pid_t pid) {
AddRefToPidMap(pid, &fdrefs_);
total_refs_++;
}
// Adds one map reference for the given pid
void AddMapRef(pid_t pid) {
AddRefToPidMap(pid, &maprefs_);
total_refs_++;
}
// Getters for each property
uint64_t size() const { return size_; }
const std::unordered_map& fdrefs() const { return fdrefs_; }
const std::unordered_map& maprefs() const { return maprefs_; }
ino_t inode() const { return inode_; }
uint64_t total_refs() const { return total_refs_; }
uint64_t count() const { return count_; };
const std::set& pids() const { return pids_; }
const std::string& name() const { return name_; }
const std::string& exporter() const { return exporter_; }
void SetName(const std::string& name) { name_ = name; }
void SetExporter(const std::string& exporter) { exporter_ = exporter; }
void SetCount(uint64_t count) { count_ = count; }
uint64_t Pss() const { return size_ / pids_.size(); }
bool operator==(const DmaBuffer& rhs) {
return (inode_ == rhs.inode()) && (size_ == rhs.size()) && (name_ == rhs.name()) &&
(exporter_ == rhs.exporter());
}
private:
ino_t inode_;
uint64_t size_;
uint64_t count_;
uint64_t total_refs_;
std::set pids_;
std::string exporter_;
std::string name_;
std::unordered_map fdrefs_;
std::unordered_map maprefs_;
void AddRefToPidMap(pid_t pid, std::unordered_map* map) {
// The first time we find a ref, we set the ref count to 1
// otherwise, increment the existing ref count
auto [it, inserted] = map->insert(std::make_pair(pid, 1));
if (!inserted) it->second++;
pids_.insert(pid);
}
};
主要成员变量
-
name_ : 该dmabuf的name，如果读不到name，默认为 ‘
’ -
pids_: 有dup或map该dmabuf的pid 集合。
-
count_: fdinfo里面的count，目前看dambuf_dump并没有用。
-
size_: 该dmabuf占用的内存大小，单位是byte。
-
inode_: 该dmabuf的inode。
-
exporter_: 申请该dmabuf的name，如果读不到name，默认为'
’。 -
total_refs_: fdrefs 个数 + maprefs 个数，目前看dambuf_dump并没有用。
-
fdrefs_: 有open或dup该dmabuf的pid集合。注：一个pid对同一个dmabuf(inode)可能有多个reference。
-
maprefs_: 有map该dmabuf的pid集合。注：一个pid对同一个dmabuf(inode)可能有多个reference。
FD和Inode的关系
为了实现buffer的共享，在内核中将DMA-BUF将buffer与file关联起来，一个Buffer对应唯一一个File,一个File对应唯一一个 inode,将这个file的fd返回给应用层,通过binder实现进程之间的fd传递(dup)，进而拿到唯一的File 和 Buffer。
dump整个系统流程原理
直接执行dmabuf_dump会dump 整个系统的dmabuf 信息，代码执行流程如下：
ReadDmaBufFdRefs
// Public methods
bool ReadDmaBufFdRefs(int pid, std::vector* dmabufs,
const std::string& procfs_path) {
constexpr char permission_err_msg[] =
"Failed to read fdinfo - requires either PTRACE_MODE_READ or root depending on "
"the device kernel";
static bool logged_permission_err = false;
std::string fdinfo_dir_path =
::android::base::StringPrintf("%s/%d/fdinfo", procfs_path.c_str(), pid);
std::unique_ptr dir(opendir(fdinfo_dir_path.c_str()), &closedir);
if (!dir) {
// Don't log permission errors to reduce log spam on devices where fdinfo
// of other processes can only be read by root.
if (errno != EACCES) {
PLOG(ERROR) << "Failed to open " << fdinfo_dir_path << " directory";
} else if (!logged_permission_err) {
LOG(ERROR) << permission_err_msg;
logged_permission_err = true;
}
return false;
}
struct dirent* dent;
while ((dent = readdir(dir.get()))) {
int fd;
if (!::android::base::ParseInt(dent->d_name, &fd)) {
continue;
}
// Set defaults in case the kernel doesn't give us the information
// we need in fdinfo
std::string name = "";
std::string exporter = "";
uint64_t count = 0;
uint64_t size = 0;
uint64_t inode = -1;
bool is_dmabuf_file = false;
auto fdinfo_result = ReadDmaBufFdInfo(pid, fd, &name, &exporter, &count, &size, &inode,
&is_dmabuf_file, procfs_path);
if (fdinfo_result != OK) {
if (fdinfo_result == NOT_FOUND) {
continue;
}
// Don't log permission errors to reduce log spam when the process doesn't
// have the PTRACE_MODE_READ permission.
if (errno != EACCES) {
LOG(ERROR) << "Failed to read fd info for pid: " << pid << ", fd: " << fd;
} else if (!logged_permission_err) {
LOG(ERROR) << permission_err_msg;
logged_permission_err = true;
}
return false;
}
if (!is_dmabuf_file) {
continue;
}
if (inode == static_cast(-1)) {
// Fallback to stat() on the fd path to get inode number
std::string fd_path =
::android::base::StringPrintf("%s/%d/fd/%d", procfs_path.c_str(), pid, fd);
struct stat sb;
if (stat(fd_path.c_str(), &sb) < 0) {
if (errno == ENOENT) {
continue;
}
PLOG(ERROR) << "Failed to stat: " << fd_path;
return false;
}
inode = sb.st_ino;
// If root, calculate size from the allocated blocks.
size = sb.st_blocks * 512;
}
auto buf = std::find_if(dmabufs->begin(), dmabufs->end(),
[&inode](const DmaBuffer& dbuf) { return dbuf.inode() == inode; });
if (buf != dmabufs->end()) {
if (buf->name() == "" || buf->name() == "") buf->SetName(name);
if (buf->exporter() == "" || buf->exporter() == "") buf->SetExporter(exporter);
if (buf->count() == 0) buf->SetCount(count);
buf->AddFdRef(pid);
continue;
}
DmaBuffer& db = dmabufs->emplace_back(inode, size, count, exporter, name);
db.AddFdRef(pid);
}
return true;
} 读取 /proc/
- count
- exp_name，有exp_name则表示是 dmabuf 的file。
- name
- size
- ino：inode
如果是dmabuf file，但没有读到inode，则：
读取 /proc/
if (inode == static_cast(-1)) {
// Fallback to stat() on the fd path to get inode number
std::string fd_path =
::android::base::StringPrintf("%s/%d/fd/%d", procfs_path.c_str(), pid, fd);
struct stat sb;
if (stat(fd_path.c_str(), &sb) < 0) {
if (errno == ENOENT) {
continue;
}
PLOG(ERROR) << "Failed to stat: " << fd_path;
return false;
}
inode = sb.st_ino;
// If root, calculate size from the allocated blocks.
size = sb.st_blocks * 512;
} 最后，调用DmaBuffer的AddFdRef，添加到fdrefs_ map里面去。
AddFdRef
// Adds one file descriptor reference for the given pid
void AddFdRef(pid_t pid) {
AddRefToPidMap(pid, &fdrefs_);
total_refs_++;
}ReadDmaBufMapRefs
bool ReadDmaBufMapRefs(pid_t pid, std::vector* dmabufs,
const std::string& procfs_path,
const std::string& dmabuf_sysfs_path) {
std::string mapspath = ::android::base::StringPrintf("%s/%d/maps", procfs_path.c_str(), pid);
std::ifstream fp(mapspath);
if (!fp) {
LOG(ERROR) << "Failed to open " << mapspath << " for pid: " << pid;
return false;
}
// Process the map if it is dmabuf. Add map reference to existing object in 'dmabufs'
// if it was already found. If it wasn't create a new one and append it to 'dmabufs'
auto account_dmabuf = [&](const android::procinfo::MapInfo& mapinfo) {
// no need to look into this mapping if it is not dmabuf
if (!FileIsDmaBuf(mapinfo.name)) {
return;
}
auto buf = std::find_if(
dmabufs->begin(), dmabufs->end(),
[&mapinfo](const DmaBuffer& dbuf) { return dbuf.inode() == mapinfo.inode; });
if (buf != dmabufs->end()) {
buf->AddMapRef(pid);
return;
}
// We have a new buffer, but unknown count and name and exporter name
// Try to lookup exporter name in sysfs
std::string exporter;
bool sysfs_stats = ReadBufferExporter(mapinfo.inode, &exporter, dmabuf_sysfs_path);
if (!sysfs_stats) {
exporter = "";
}
// Using the VMA range as the size of the buffer can be misleading,
// due to partially mapped buffers or VMAs that extend beyond the
// buffer size.
//
// Attempt to retrieve the real buffer size from sysfs.
uint64_t size = 0;
if (!sysfs_stats || !ReadBufferSize(mapinfo.inode, &size, dmabuf_sysfs_path)) {
size = mapinfo.end - mapinfo.start;
}
DmaBuffer& dbuf = dmabufs->emplace_back(mapinfo.inode, size, 0, exporter, "");
dbuf.AddMapRef(pid);
};
for (std::string line; getline(fp, line);) {
if (!::android::procinfo::ReadMapFileContent(line.data(), account_dmabuf)) {
LOG(ERROR) << "Failed to parse " << mapspath << " for pid: " << pid;
return false;
}
}
return true;
} 读取/proc/
注：如果从maps里面读到的inode不在fdrefs_ 里面，则会尝试到 /sys/kernel/dmabuf/buffers 里面去读该dmabuf的size，name，exp_name。
然后调用DmaBuffer的AddMapRef，添加到maprefs_ map里面去。
AddMapRef
// Adds one map reference for the given pid
void AddMapRef(pid_t pid) {
AddRefToPidMap(pid, &maprefs_);
total_refs_++;
}dmabuf_dump
流程跟dump 整個系统的dmabuf info类似，只是这里只dump指定pid的dmabuf info。
dmabuf_dump -a
以Table[buffer x process]方式呈现dmabuf info。
跟dmabuf_dump相比，只是打印DmaBuffer的方式不一样。
dmabuf_dump -b
Dmabuf Sysfs Stats统计，有三个相关类：
| 类 | 定义 | 作用 |
|---|---|---|
| DmabufSysfsStats |
|
Dmabuf sysfs 统计信息每一块Dmabuf信息exporter信息总Dmabuf信息 |
| DmabufInfo |
|
统计一块Dmabuf 信息，包括inode、exporter name、size |
| DmabufTotal |
|
统计整个系统的Dmabuf信息，包括buffer总数、buffer总大小 |
代码流程
dmabuf的运用
实例分析
背景
项目中具体泄漏场景：sat模式拍照退出相机 dma-buf heaps出现内存泄漏。关闭相机后查看dmabuf内存占用，当为0情况是没有出现内存泄漏，非0我们认为有内存泄漏。
adb shell dmabuf_dump 30618
vendor.qti.came:30618
Name Rss Pss nr_procs Inode
4 kB 4 kB 1 348915
144 kB 144 kB 1 348916
32768 kB 32768 kB 1 348948
4 kB 4 kB 1 349013
148 kB 148 kB 1 349091
4 kB 4 kB 1 349092
4 kB 4 kB 1 349093
4 kB 4 kB 1 349094
32768 kB 32768 kB 1 357177
148 kB 148 kB 1 358102点
4 kB 4 kB 1 358103
4 kB 4 kB 1 358104
4 kB 4 kB 1 358105
1024 kB 1024 kB 1 359590
4 kB 4 kB 1 361040
532 kB 532 kB 1 361101
5308 kB 5308 kB 1 362040
568 kB 568 kB 1 362057
PROCESS TOTAL 73444 kB 73444 kB
dmabuf total: 73444 kB kernel_rss: 0 kB userspace_rss: 73444 kB userspace_pss: 73444 kB 可以看到一次操作泄漏73444 kB。
解决方案
怎么去定位具体的泄漏backtrace，进而定位到具体的代码？
通用的处理方式是在kernel底层dma-buf申请内存的位置加入tracepoint，用simpleperf去跟踪所有dma-buf申请时的backtrace，基于泄漏点Inode去找到对应backtrace
加tracepoint
Using the Linux Kernel Tracepoints — The Linux Kernel documentation
tracepoint实现patch
drivers/dma-buf/dma-heap.c
// SPDX-License-Identifier: GPL-2.0
/*
* Framework for userspace DMA-BUF allocations
*
* Copyright (C) 2011 Google, Inc.
* Copyright (C) 2019 Linaro Ltd.
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define CREATE_TRACE_POINTS
#include
#define DEVNAME "dma_heap"
#define NUM_HEAP_MINORS 128
/**
* struct dma_heap - represents a dmabuf heap in the system
* @name: used for debugging/device-node name
* @ops: ops struct for this heap
* @heap_devt heap device node
* @list list head connecting to list of heaps
* @heap_cdev heap char device
* @heap_dev heap device struct
*
* Represents a heap of memory from which buffers can be made.
*/
struct dma_heap {
const char *name;
const struct dma_heap_ops *ops;
void *priv;
dev_t heap_devt;
struct list_head list;
struct cdev heap_cdev;
struct kref refcount;
struct device *heap_dev;
};
static LIST_HEAD(heap_list);
static DEFINE_MUTEX(heap_list_lock);
static dev_t dma_heap_devt;
static struct class *dma_heap_class;
static DEFINE_XARRAY_ALLOC(dma_heap_minors);
struct dma_heap *dma_heap_find(const char *name)
{
struct dma_heap *h;
mutex_lock(&heap_list_lock);
list_for_each_entry(h, &heap_list, list) {
if (!strcmp(h->name, name)) {
kref_get(&h->refcount);
mutex_unlock(&heap_list_lock);
return h;
}
}
mutex_unlock(&heap_list_lock);
return NULL;
}
EXPORT_SYMBOL_GPL(dma_heap_find);
void dma_heap_buffer_free(struct dma_buf *dmabuf)
{
dma_buf_put(dmabuf);
}
EXPORT_SYMBOL_GPL(dma_heap_buffer_free);
struct dma_buf *dma_heap_buffer_alloc(struct dma_heap *heap, size_t len,
unsigned int fd_flags,
unsigned int heap_flags)
{
struct dma_buf *dmabuf = NULL;
if (fd_flags & ~DMA_HEAP_VALID_FD_FLAGS)
return ERR_PTR(-EINVAL);
if (heap_flags & ~DMA_HEAP_VALID_HEAP_FLAGS)
return ERR_PTR(-EINVAL);
/*
* Allocations from all heaps have to begin
* and end on page boundaries.
*/
len = PAGE_ALIGN(len);
if (!len)
return ERR_PTR(-EINVAL);
dmabuf = heap->ops->allocate(heap, len, fd_flags, heap_flags);
trace_dmabuf_alloc(dmabuf->exp_name, heap->name, len, file_inode(dmabuf->file)->i_ino);
return dmabuf;
}
EXPORT_SYMBOL_GPL(dma_heap_buffer_alloc);
int dma_heap_bufferfd_alloc(struct dma_heap *heap, size_t len,
unsigned int fd_flags,
unsigned int heap_flags)
{
struct dma_buf *dmabuf;
int fd;
dmabuf = dma_heap_buffer_alloc(heap, len, fd_flags, heap_flags);
if (IS_ERR(dmabuf))
return PTR_ERR(dmabuf);
fd = dma_buf_fd(dmabuf, fd_flags);
if (fd < 0) {
dma_buf_put(dmabuf);
/* just return, as put will call release and that will free */
}
return fd;
}
EXPORT_SYMBOL_GPL(dma_heap_bufferfd_alloc);
static int dma_heap_open(struct inode *inode, struct file *file)
{
struct dma_heap *heap;
heap = xa_load(&dma_heap_minors, iminor(inode));
if (!heap) {
pr_err("dma_heap: minor %d unknown.\n", iminor(inode));
return -ENODEV;
}
/* instance data as context */
file->private_data = heap;
nonseekable_open(inode, file);
return 0;
}
static long dma_heap_ioctl_allocate(struct file *file, void *data)
{
struct dma_heap_allocation_data *heap_allocation = data;
struct dma_heap *heap = file->private_data;
int fd;
if (heap_allocation->fd)
return -EINVAL;
fd = dma_heap_bufferfd_alloc(heap, heap_allocation->len,
heap_allocation->fd_flags,
heap_allocation->heap_flags);
if (fd < 0)
return fd;
heap_allocation->fd = fd;
return 0;
}
static unsigned int dma_heap_ioctl_cmds[] = {
DMA_HEAP_IOCTL_ALLOC,
};
static long dma_heap_ioctl(struct file *file, unsigned int ucmd,
unsigned long arg)
{
char stack_kdata[128];
char *kdata = stack_kdata;
unsigned int kcmd;
unsigned int in_size, out_size, drv_size, ksize;
int nr = _IOC_NR(ucmd);
int ret = 0;
if (nr >= ARRAY_SIZE(dma_heap_ioctl_cmds))
return -EINVAL;
/* Get the kernel ioctl cmd that matches */
kcmd = dma_heap_ioctl_cmds[nr];
/* Figure out the delta between user cmd size and kernel cmd size */
drv_size = _IOC_SIZE(kcmd);
out_size = _IOC_SIZE(ucmd);
in_size = out_size;
if ((ucmd & kcmd & IOC_IN) == 0)
in_size = 0;
if ((ucmd & kcmd & IOC_OUT) == 0)
out_size = 0;
ksize = max(max(in_size, out_size), drv_size);
/* If necessary, allocate buffer for ioctl argument */
if (ksize > sizeof(stack_kdata)) {
kdata = kmalloc(ksize, GFP_KERNEL);
if (!kdata)
return -ENOMEM;
}
if (copy_from_user(kdata, (void __user *)arg, in_size) != 0) {
ret = -EFAULT;
goto err;
}
/* zero out any difference between the kernel/user structure size */
if (ksize > in_size)
memset(kdata + in_size, 0, ksize - in_size);
switch (kcmd) {
case DMA_HEAP_IOCTL_ALLOC:
ret = dma_heap_ioctl_allocate(file, kdata);
break;
default:
ret = -ENOTTY;
goto err;
}
if (copy_to_user((void __user *)arg, kdata, out_size) != 0)
ret = -EFAULT;
err:
if (kdata != stack_kdata)
kfree(kdata);
return ret;
}
static const struct file_operations dma_heap_fops = {
.owner = THIS_MODULE,
.open = dma_heap_open,
.unlocked_ioctl = dma_heap_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = dma_heap_ioctl,
#endif
};
/**
* dma_heap_get_drvdata() - get per-subdriver data for the heap
* @heap: DMA-Heap to retrieve private data for
*
* Returns:
* The per-subdriver data for the heap.
*/
void *dma_heap_get_drvdata(struct dma_heap *heap)
{
return heap->priv;
}
EXPORT_SYMBOL_GPL(dma_heap_get_drvdata);
static void dma_heap_release(struct kref *ref)
{
struct dma_heap *heap = container_of(ref, struct dma_heap, refcount);
int minor = MINOR(heap->heap_devt);
/* Note, we already holding the heap_list_lock here */
list_del(&heap->list);
device_destroy(dma_heap_class, heap->heap_devt);
cdev_del(&heap->heap_cdev);
xa_erase(&dma_heap_minors, minor);
kfree(heap);
}
void dma_heap_put(struct dma_heap *h)
{
/*
* Take the heap_list_lock now to avoid racing with code
* scanning the list and then taking a kref.
*/
mutex_lock(&heap_list_lock);
kref_put(&h->refcount, dma_heap_release);
mutex_unlock(&heap_list_lock);
}
EXPORT_SYMBOL_GPL(dma_heap_put);
/**
* dma_heap_get_dev() - get device struct for the heap
* @heap: DMA-Heap to retrieve device struct from
*
* Returns:
* The device struct for the heap.
*/
struct device *dma_heap_get_dev(struct dma_heap *heap)
{
return heap->heap_dev;
}
EXPORT_SYMBOL_GPL(dma_heap_get_dev);
/**
* dma_heap_get_name() - get heap name
* @heap: DMA-Heap to retrieve private data for
*
* Returns:
* The char* for the heap name.
*/
const char *dma_heap_get_name(struct dma_heap *heap)
{
return heap->name;
}
EXPORT_SYMBOL_GPL(dma_heap_get_name);
struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
{
struct dma_heap *heap, *err_ret;
unsigned int minor;
int ret;
if (!exp_info->name || !strcmp(exp_info->name, "")) {
pr_err("dma_heap: Cannot add heap without a name\n");
return ERR_PTR(-EINVAL);
}
if (!exp_info->ops || !exp_info->ops->allocate) {
pr_err("dma_heap: Cannot add heap with invalid ops struct\n");
return ERR_PTR(-EINVAL);
}
/* check the name is unique */
heap = dma_heap_find(exp_info->name);
if (heap) {
pr_err("dma_heap: Already registered heap named %s\n",
exp_info->name);
dma_heap_put(heap);
return ERR_PTR(-EINVAL);
}
heap = kzalloc(sizeof(*heap), GFP_KERNEL);
if (!heap)
return ERR_PTR(-ENOMEM);
kref_init(&heap->refcount);
heap->name = exp_info->name;
heap->ops = exp_info->ops;
heap->priv = exp_info->priv;
/* Find unused minor number */
ret = xa_alloc(&dma_heap_minors, &minor, heap,
XA_LIMIT(0, NUM_HEAP_MINORS - 1), GFP_KERNEL);
if (ret < 0) {
pr_err("dma_heap: Unable to get minor number for heap\n");
err_ret = ERR_PTR(ret);
goto err0;
}
/* Create device */
heap->heap_devt = MKDEV(MAJOR(dma_heap_devt), minor);
cdev_init(&heap->heap_cdev, &dma_heap_fops);
ret = cdev_add(&heap->heap_cdev, heap->heap_devt, 1);
if (ret < 0) {
pr_err("dma_heap: Unable to add char device\n");
err_ret = ERR_PTR(ret);
goto err1;
}
heap->heap_dev = device_create(dma_heap_class,
NULL,
heap->heap_devt,
NULL,
heap->name);
if (IS_ERR(heap->heap_dev)) {
pr_err("dma_heap: Unable to create device\n");
err_ret = ERR_CAST(heap->heap_dev);
goto err2;
}
/* Make sure it doesn't disappear on us */
heap->heap_dev = get_device(heap->heap_dev);
/* Add heap to the list */
mutex_lock(&heap_list_lock);
list_add(&heap->list, &heap_list);
mutex_unlock(&heap_list_lock);
return heap;
err2:
cdev_del(&heap->heap_cdev);
err1:
xa_erase(&dma_heap_minors, minor);
err0:
kfree(heap);
return err_ret;
}
EXPORT_SYMBOL_GPL(dma_heap_add);
static char *dma_heap_devnode(struct device *dev, umode_t *mode)
{
return kasprintf(GFP_KERNEL, "dma_heap/%s", dev_name(dev));
}
static ssize_t total_pools_kb_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct dma_heap *heap;
u64 total_pool_size = 0;
mutex_lock(&heap_list_lock);
list_for_each_entry(heap, &heap_list, list) {
if (heap->ops->get_pool_size)
total_pool_size += heap->ops->get_pool_size(heap);
}
mutex_unlock(&heap_list_lock);
return sysfs_emit(buf, "%llu\n", total_pool_size / 1024);
}
static struct kobj_attribute total_pools_kb_attr =
__ATTR_RO(total_pools_kb);
static struct attribute *dma_heap_sysfs_attrs[] = {
&total_pools_kb_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(dma_heap_sysfs);
static struct kobject *dma_heap_kobject;
static int dma_heap_sysfs_setup(void)
{
int ret;
dma_heap_kobject = kobject_create_and_add("dma_heap", kernel_kobj);
if (!dma_heap_kobject)
return -ENOMEM;
ret = sysfs_create_groups(dma_heap_kobject, dma_heap_sysfs_groups);
if (ret) {
kobject_put(dma_heap_kobject);
return ret;
}
return 0;
}
static void dma_heap_sysfs_teardown(void)
{
kobject_put(dma_heap_kobject);
}
static int dma_heap_init(void)
{
int ret;
ret = dma_heap_sysfs_setup();
if (ret)
return ret;
ret = alloc_chrdev_region(&dma_heap_devt, 0, NUM_HEAP_MINORS, DEVNAME);
if (ret)
goto err_chrdev;
dma_heap_class = class_create(THIS_MODULE, DEVNAME);
if (IS_ERR(dma_heap_class)) {
ret = PTR_ERR(dma_heap_class);
goto err_class;
}
dma_heap_class->devnode = dma_heap_devnode;
return 0;
err_class:
unregister_chrdev_region(dma_heap_devt, NUM_HEAP_MINORS);
err_chrdev:
dma_heap_sysfs_teardown();
return ret;
}
subsys_initcall(dma_heap_init);
include/trace/events/dma_buf.h
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM dma_buf
#if !defined(_TRACE_DMA_BUF_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_DMA_BUF_H
#include
#include
TRACE_EVENT(dmabuf_alloc,
TP_PROTO(const char *string1, const char *string2,
uint64_t val1, uint64_t val2),
TP_ARGS(string1, string2, val1, val2),
TP_STRUCT__entry(
__string(string1, string1)
__string(string2, string2)
__field(uint64_t, val1)
__field(uint64_t, val2)
),
TP_fast_assign(
__assign_str(string1, string1);
__assign_str(string2, string2);
__entry->val1 = val1;
__entry->val2 = val2;
),
TP_printk(
"%s: %s Len=%llu Inode=%llu",
__get_str(string1), __get_str(string2),
__entry->val1, __entry->val2
)
);
#endif /* _TRACE_DMA_BUF_H */
/* This part must be outside protection */
#include
使用simpleperf抓取dmabuf申请点所有backtrace
perf_cam_log.sh
#!/bin/bash
adb root; adb remount
local_path=$(date +%F_%H%M%S)
#pid=$(adb shell ps | grep camera.provider | awk '{print $2}')
pid_app=$(adb shell ps | grep com.android.camera | awk '{print $2}')
pid_server=$(adb shell ps | grep -Eia "cameraserver$" | awk '{print $2}')
pid_provider=$(adb shell ps | grep camera.provider | awk '{print $2}')
pid_allocate=$(adb shell ps | grep vendor.qti.hardware.display.allocator-service | awk '{print $2}')
pid_hidl=$(adb shell ps | grep [email protected] | awk '{print $2}')
mkdir $local_path
echo "Begin to catch perf data..."
if [ ! -n "$1" ] ;then
adb shell "simpleperf record -e camera:cam_log_event,dma_buf:dmabuf_alloc -p $pid_app,$pid_server,$pid_provider,$pid_allocate,$pid_hidl --call-graph dwarf --duration 20 -o /data/local/tmp/perf.data"
else
adb shell "simpleperf record -e camera:cam_log_event,dma_buf:dmabuf_alloc -p $pid,$pid_server,$pid_provider,$pid_allocate,$pid_hidl --call-graph dwarf --duration $1 -o /data/local/tmp/perf.data"
fi
echo "Complete"
adb shell "simpleperf report -i /data/local/tmp/perf.data" > $local_path/perf.txt
adb shell "simpleperf report -i /data/local/tmp/perf.data -g --full-callgraph" > $local_path/perf_callgraph.txt
adb pull /data/local/tmp/perf.data $local_path
python3 scripts/report_sample.py $local_path/perf.data --show_tracing_data > $local_path/perf_trace_report.txt执行./perf_cam_log.sh
操作一遍复现步骤就可以抓到dmabuf申请点所有backtrace。
举例
打开perf_trace_report.txt
搜索inode “348915”找到：
HwBinder:30618_ 31356 [006] 1876.000000: 1 dma_buf:dmabuf_alloc:
ffffffe8c67a714c dma_heap_buffer_alloc ([kernel.kallsyms])
ffffffe8c67a714a dma_heap_buffer_alloc ([kernel.kallsyms])
ffffffe8c67a798a dma_heap_ioctl ([kernel.kallsyms])
ffffffe8c5f88dda __arm64_sys_ioctl ([kernel.kallsyms])
ffffffe8c5a8a4d6 el0_svc_common ([kernel.kallsyms])
ffffffe8c725e272 el0_svc ([kernel.kallsyms])
ffffffe8c725e1e6 el0_sync_handler ([kernel.kallsyms])
ffffffe8c5a120be el0_sync ([kernel.kallsyms])
7c7fe1dc0c __ioctl (/apex/com.android.runtime/lib64/bionic/libc.so)
7c7fdd784c ioctl (/apex/com.android.runtime/lib64/bionic/libc.so)
796f39b020 BufferAllocator::DmabufAlloc(std::__1::basic_string
796f39b26c BufferAllocator::Alloc(std::__1::basic_string
796f39e1bc DmabufHeapAlloc (/apex/com.android.vndk.v31/lib64/libdmabufheap.so)
796b8ce17c rpcmem_alloc_internal (/vendor/lib64/libcdsprpc.so)
796b8cc628 apps_mem_request_map64 (/vendor/lib64/libcdsprpc.so)
796b8cce9c apps_mem_skel_invoke.cfi (/vendor/lib64/libcdsprpc.so)
796b8c46c0 listener_start_thread.cfi (/vendor/lib64/libcdsprpc.so)
7c7fe329a4 __pthread_start(void*) (/apex/com.android.runtime/lib64/bionic/libc.so)
tracing data:
common_type : 693
common_flags : 0
common_preempt_count : 1
common_pid : 31356
string1 : system
string2 : system
val1 : 4096
val2 : 348915
上面的信息就是泄漏点的backtrace。
基于上面点可以看到是libcdsprpc.so内部泄漏，那接下来就需要看到底哪些算法使用到cdsp
Android 中 gralloc buffer和image buffer底层都是基于 dma_buf来实现的。
Provider进程基于vendor.qti.hardware.display.allocator-service申请驻留分析
libdmabufheaps.so
platform/system/memory/libdmabufheap
Android.bp
//
// Copyright (C) 2020 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package {
default_applicable_licenses: ["Android-Apache-2.0"],
}
cc_library {
srcs: [
"BufferAllocator.cpp",
"BufferAllocatorWrapper.cpp",
],
name: "libdmabufheap",
vendor_available: true,
vndk: {
enabled: true,
support_system_process: true,
},
// Added because codec2 is double_loadable.
// See b/147147883, b/147147992
double_loadable:true,
apex_available: [
"//apex_available:platform",
"//apex_available:anyapex",
],
min_sdk_version: "29",
cflags: [
"-Wall",
"-Werror",
],
local_include_dirs: [
"include",
],
export_include_dirs: [
"include",
],
static_libs: [
"libbase",
"libion",
"libutils",
],
shared_libs: [
"libcutils",
"liblog",
],
export_static_lib_headers: [
"libbase",
"libion",
],
}
BufferAllocator.cpp
/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "DMABUFHEAPS"
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define ATRACE_TAG ATRACE_TAG_ALWAYS
#include
#include
static constexpr char kDmaHeapRoot[] = "/dev/dma_heap/";
static constexpr char kIonDevice[] = "/dev/ion";
static constexpr char kIonSystemHeapName[] = "ion_system_heap";
void BufferAllocator::LogInterface(const std::string& interface) {
if (!logged_interface_) {
LOG(INFO) << "Using : " << interface;
logged_interface_ = true;
}
}
int BufferAllocator::OpenDmabufHeap(const std::string& heap_name) {
std::shared_lock slock(dmabuf_heap_fd_mutex_);
/* Check if heap has already been opened. */
auto it = dmabuf_heap_fds_.find(heap_name);
if (it != dmabuf_heap_fds_.end())
return it->second;
slock.unlock();
/*
* Heap device needs to be opened, use a unique_lock since dmabuf_heap_fd_
* needs to be modified.
*/
std::unique_lock ulock(dmabuf_heap_fd_mutex_);
/*
* Check if we already opened this heap again to prevent racing threads from
* opening the heap device multiple times.
*/
it = dmabuf_heap_fds_.find(heap_name);
if (it != dmabuf_heap_fds_.end()) return it->second;
std::string heap_path = kDmaHeapRoot + heap_name;
int fd = TEMP_FAILURE_RETRY(open(heap_path.c_str(), O_RDONLY | O_CLOEXEC));
if (fd < 0) return -errno;
LOG(INFO) << "Using DMA-BUF heap named: " << heap_name;
auto ret = dmabuf_heap_fds_.insert({heap_name, android::base::unique_fd(fd)});
CHECK(ret.second);
return fd;
}
void BufferAllocator::QueryIonHeaps() {
uses_legacy_ion_iface_ = ion_is_legacy(ion_fd_);
if (uses_legacy_ion_iface_) {
LogInterface("Legacy ion heaps");
MapNameToIonMask(kDmabufSystemHeapName, ION_HEAP_SYSTEM_MASK, ION_FLAG_CACHED);
MapNameToIonMask(kDmabufSystemUncachedHeapName, ION_HEAP_SYSTEM_MASK);
return;
}
int heap_count;
int ret = ion_query_heap_cnt(ion_fd_, &heap_count);
if (ret == 0) {
ion_heap_info_.resize(heap_count, {});
ret = ion_query_get_heaps(ion_fd_, heap_count, ion_heap_info_.data());
}
// Abort if heap query fails
CHECK(ret == 0)
<< "Non-legacy ION implementation must support heap information queries";
LogInterface("Non-legacy ION heaps");
/*
* No error checking here, it is possible that devices may have used another name for
* the ion system heap.
*/
MapNameToIonName(kDmabufSystemHeapName, kIonSystemHeapName, ION_FLAG_CACHED);
MapNameToIonName(kDmabufSystemUncachedHeapName, kIonSystemHeapName);
}
BufferAllocator::BufferAllocator() {
ion_fd_.reset(TEMP_FAILURE_RETRY(open(kIonDevice, O_RDONLY| O_CLOEXEC)));
if (ion_fd_ >= 0)
QueryIonHeaps();
}
int BufferAllocator::MapNameToIonMask(const std::string& heap_name, unsigned int ion_heap_mask,
unsigned int ion_heap_flags) {
if (!ion_heap_mask)
return -EINVAL;
IonHeapConfig heap_config = { ion_heap_mask, ion_heap_flags };
std::unique_lock ulock(heap_name_to_config_mutex_);
heap_name_to_config_[heap_name] = heap_config;
return 0;
}
int BufferAllocator::GetIonHeapIdByName(const std::string& heap_name, unsigned int* heap_id) {
for (auto& it : ion_heap_info_) {
if (heap_name == it.name) {
*heap_id = it.heap_id;
return 0;
}
}
LOG(ERROR) << "No ion heap of name " << heap_name << " exists";
return -EINVAL;
}
int BufferAllocator::MapNameToIonName(const std::string& heap_name,
const std::string& ion_heap_name,
unsigned int ion_heap_flags) {
unsigned int ion_heap_id = 0;
auto ret = GetIonHeapIdByName(ion_heap_name, &ion_heap_id);
if (ret < 0)
return ret;
unsigned int ion_heap_mask = 1 << ion_heap_id;
IonHeapConfig heap_config = { ion_heap_mask, ion_heap_flags };
std::unique_lock ulock(heap_name_to_config_mutex_);
heap_name_to_config_[heap_name] = heap_config;
return 0;
}
int BufferAllocator::MapNameToIonHeap(const std::string& heap_name,
const std::string& ion_heap_name,
unsigned int ion_heap_flags,
unsigned int legacy_ion_heap_mask,
unsigned int legacy_ion_heap_flags) {
/* if the DMA-BUF Heap exists, we can ignore ion mappings */
int ret = OpenDmabufHeap(heap_name);
if (ret >= 0)
return 0;
/* If ION support is not detected, ignore the mappings */
if (ion_fd_ < 0) return 0;
if (uses_legacy_ion_iface_ || ion_heap_name == "") {
ret = MapNameToIonMask(heap_name, legacy_ion_heap_mask, legacy_ion_heap_flags);
} else if (!ion_heap_name.empty()) {
ret = MapNameToIonName(heap_name, ion_heap_name, ion_heap_flags);
}
return ret;
}
int BufferAllocator::GetIonConfig(const std::string& heap_name, IonHeapConfig& heap_config) {
int ret = 0;
std::shared_lock slock(heap_name_to_config_mutex_);
auto it = heap_name_to_config_.find(heap_name);
if (it != heap_name_to_config_.end()) {
heap_config = it->second;
return ret;
}
slock.unlock();
if (uses_legacy_ion_iface_) {
ret = -EINVAL;
} else {
unsigned int heap_id;
ret = GetIonHeapIdByName(heap_name, &heap_id);
if (ret == 0) {
heap_config.mask = 1 << heap_id;
heap_config.flags = 0;
/* save it so that this lookup does not need to happen again */
std::unique_lock ulock(heap_name_to_config_mutex_);
heap_name_to_config_[heap_name] = heap_config;
}
}
if (ret)
LOG(ERROR) << "No ion heap of name " << heap_name << " exists";
return ret;
}
int BufferAllocator::DmabufAlloc(const std::string& heap_name, size_t len) {
int fd = OpenDmabufHeap(heap_name);
if (fd < 0) return fd;
struct dma_heap_allocation_data heap_data{
.len = len, // length of data to be allocated in bytes
.fd_flags = O_RDWR | O_CLOEXEC, // permissions for the memory to be allocated
};
auto ret = TEMP_FAILURE_RETRY(ioctl(fd, DMA_HEAP_IOCTL_ALLOC, &heap_data));
if (ret < 0) {
PLOG(ERROR) << "Unable to allocate from DMA-BUF heap: " << heap_name;
return ret;
}
return heap_data.fd;
}
int BufferAllocator::IonAlloc(const std::string& heap_name, size_t len,
unsigned int heap_flags, size_t legacy_align) {
IonHeapConfig heap_config;
auto ret = GetIonConfig(heap_name, heap_config);
if (ret)
return ret;
int alloc_fd = -1;
unsigned int flags = heap_config.flags | heap_flags;
ret = ion_alloc_fd(ion_fd_, len, legacy_align, heap_config.mask, flags, &alloc_fd);
if (ret) {
PLOG(ERROR) << "allocation fails for ion heap with mask: " << heap_config.mask
<< " and flags: " << flags;
return ret;
}
return alloc_fd;
}
#define TRACE_MARKER_PATH "/sys/kernel/tracing/trace_marker"
void trace_kernel_buffer(const char *fmt, ...)
{
char buf[PAGE_SIZE];
va_list ap;
static int fd = -1;
ssize_t len, ret;
if (fd < 0) {
fd = open(TRACE_MARKER_PATH, O_WRONLY | O_CLOEXEC);
if (fd < 0) {
return;
}
}
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
len = strlen(buf);
ret = TEMP_FAILURE_RETRY(write(fd, buf, len));
if (ret < 0) {
if (errno != EBADF) {
close(fd);
fd = -1;
}
return;
}
}
int BufferAllocator::Alloc(const std::string& heap_name, size_t len,
unsigned int heap_flags, size_t legacy_align) {
int fd = DmabufAlloc(heap_name, len);
if (fd < 0)
fd = IonAlloc(heap_name, len, heap_flags, legacy_align);
struct stat statbuf;
char trace_name[128];
fstat(fd, &statbuf);
sprintf(trace_name,"BufferAllocator inode:%llu", statbuf.st_ino);
// ATRACE_INT("BufferAllocator", statbuf.st_ino);
ATRACE_BEGIN(trace_name);
ATRACE_END();
//trace_kernel_buffer(trace_name);
return fd;
}
int BufferAllocator::AllocSystem(bool cpu_access_needed, size_t len, unsigned int heap_flags,
size_t legacy_align) {
if (!cpu_access_needed) {
/*
* CPU does not need to access allocated buffer so we try to allocate in
* the 'system-uncached' heap after querying for its existence.
*/
static bool uncached_dmabuf_system_heap_support = [this]() -> bool {
auto dmabuf_heap_list = this->GetDmabufHeapList();
return (dmabuf_heap_list.find(kDmabufSystemUncachedHeapName) != dmabuf_heap_list.end());
}();
if (uncached_dmabuf_system_heap_support)
return DmabufAlloc(kDmabufSystemUncachedHeapName, len);
static bool uncached_ion_system_heap_support = [this]() -> bool {
IonHeapConfig heap_config;
auto ret = this->GetIonConfig(kDmabufSystemUncachedHeapName, heap_config);
return (ret == 0);
}();
if (uncached_ion_system_heap_support)
return IonAlloc(kDmabufSystemUncachedHeapName, len, heap_flags, legacy_align);
}
/*
* Either 1) CPU needs to access allocated buffer OR 2) CPU does not need to
* access allocated buffer but the "system-uncached" heap is unsupported.
*/
return Alloc(kDmabufSystemHeapName, len, heap_flags, legacy_align);
}
int BufferAllocator::LegacyIonCpuSync(unsigned int dmabuf_fd,
const CustomCpuSyncLegacyIon& legacy_ion_cpu_sync_custom,
void *legacy_ion_custom_data) {
if (!legacy_ion_cpu_sync_custom)
return ion_sync_fd(ion_fd_, dmabuf_fd);
// dup ion_fd_ so that we retain its ownership.
int new_ion_fd = TEMP_FAILURE_RETRY(dup(ion_fd_.get()));
if (new_ion_fd < 0) {
PLOG(ERROR) << "Unable to dup ion fd. error: " << new_ion_fd;
return new_ion_fd;
}
int ret = legacy_ion_cpu_sync_custom(new_ion_fd, dmabuf_fd, legacy_ion_custom_data);
close(new_ion_fd);
return ret;
}
int BufferAllocator::DoSync(unsigned int dmabuf_fd, bool start, SyncType sync_type,
const CustomCpuSyncLegacyIon& legacy_ion_cpu_sync_custom,
void *legacy_ion_custom_data) {
if (uses_legacy_ion_iface_) {
return LegacyIonCpuSync(dmabuf_fd, legacy_ion_cpu_sync_custom,
legacy_ion_custom_data);
}
struct dma_buf_sync sync = {
.flags = (start ? DMA_BUF_SYNC_START : DMA_BUF_SYNC_END) |
static_cast(sync_type),
};
return TEMP_FAILURE_RETRY(ioctl(dmabuf_fd, DMA_BUF_IOCTL_SYNC, &sync));
}
int BufferAllocator::CpuSyncStart(unsigned int dmabuf_fd, SyncType sync_type,
const CustomCpuSyncLegacyIon& legacy_ion_cpu_sync_custom,
void *legacy_ion_custom_data) {
int ret = DoSync(dmabuf_fd, true /* start */, sync_type, legacy_ion_cpu_sync_custom,
legacy_ion_custom_data);
if (ret) PLOG(ERROR) << "CpuSyncStart() failure";
return ret;
}
int BufferAllocator::CpuSyncEnd(unsigned int dmabuf_fd, SyncType sync_type,
const CustomCpuSyncLegacyIon& legacy_ion_cpu_sync_custom,
void* legacy_ion_custom_data) {
int ret = DoSync(dmabuf_fd, false /* start */, sync_type, legacy_ion_cpu_sync_custom,
legacy_ion_custom_data);
if (ret) PLOG(ERROR) << "CpuSyncEnd() failure";
return ret;
}
std::unordered_set BufferAllocator::GetDmabufHeapList() {
std::unordered_set heap_list;
std::unique_ptr dir(opendir(kDmaHeapRoot), closedir);
if (dir) {
struct dirent* dent;
while ((dent = readdir(dir.get()))) {
if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, "..")) continue;
heap_list.insert(dent->d_name);
}
}
return heap_list;
}
bool BufferAllocator::CheckIonSupport() {
static bool ion_support = (access(kIonDevice, R_OK) == 0);
return ion_support;
}
p1_trace.sh
adb wait-for-device
adb root
adb shell setenforce 0
adb shell "echo 0 > sys/kernel/tracing/tracing_on"
adb shell setprop vendor.camera.sensor.logsystem 0
#https://source.n.xiaomi.com/opengrok-s/xref/pangu_8450-s-combine/frameworks/native/cmds/atrace/atrace.cpp
#adb shell perfetto --out /sdcard/camera_perf.perfetto-trace --app com.android.camera --buffer 300mb --time 5s sched freq idle ss am wm pm gfx view binder_driver hal dalvik camera video audio input res memory bionic
#adb shell perfetto --out /sdcard/camera_perf.perfetto-trace --buffer 100mb --time 5s sched freq idle ss am wm pm gfx view binder_driver hal dalvik camera input res memory bionic
cat perfetto_config.pbtx | adb shell "perfetto \
-c - --txt \
-o /sdcard/camera_perf.perfetto-trace"
adb pull sdcard/camera_perf.perfetto-trace可以抓到如下trace:
