GraphicsMagick 的 OpenCL 开发记录（五）
文章目录
- 调用`clCreateBuffer()`产生异常问题（三）
<2022-03-09 Wed>
调用clCreateBuffer()产生异常问题（三）
我在这里找到了一些有用的信息：“crash in NEO::DrmAllocation::makeBOsResident or in checkAllocationsForOverlapping when using more than one opencl block in gnuradio gr-clenabled”。
下载了compute-runtime-22.09.22577的源代码：
// compute-runtime-22.09.22577/shared/source/memory_manager/host_ptr_manager.cpp
OsHandleStorage HostPtrManager::prepareOsStorageForAllocation(MemoryManager &memoryManager, size_t size, const void *ptr, uint32_t rootDeviceIndex) {
std::lock_guard<decltype(allocationsMutex)> lock(allocationsMutex);
auto requirements = HostPtrManager::getAllocationRequirements(rootDeviceIndex, ptr, size);
UNRECOVERABLE_IF(checkAllocationsForOverlapping(memoryManager, &requirements) == RequirementsStatus::FATAL);
auto osStorage = populateAlreadyAllocatedFragments(requirements);
if (osStorage.fragmentCount > 0) {
if (memoryManager.populateOsHandles(osStorage, rootDeviceIndex) != MemoryManager::AllocationStatus::Success) {
memoryManager.cleanOsHandles(osStorage, rootDeviceIndex);
osStorage.fragmentCount = 0;
}
}
return osStorage;
}
host_ptr_manager.cpp:250就是：
UNRECOVERABLE_IF(checkAllocationsForOverlapping(memoryManager, &requirements) == RequirementsStatus::FATAL);
参考链接的：
Is flag CL_USE_HOST_PTR used to create buffers?
Are such buffers mapped (clEnqueueMapBuffer) and returned pointers used to create other buffers? Or passed as a ptr to EnqueueReadWriteBuffer/Image() calls?
我加了pixels指针的输出发现：
$ gm display ~/temp/bg1a.jpg
14:45:53 0:1.237436 0.740u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648dc333c70
14:45:53 0:1.244275 0.800u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648db4beac0
14:45:53 0:1.334968 1.370u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648dd446b00
14:45:53 0:1.336437 1.390u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648db646ae0
14:45:53 0:1.432968 2.040u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648dd446b00
14:45:53 0:1.433129 2.060u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648db646ae0
14:45:53 0:1.544831 2.780u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648de446b50
14:45:53 0:1.544873 2.790u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648dc762150
14:45:53 0:1.659341 3.630u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648df446be0
14:45:53 0:1.659420 3.630u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648dd935030
14:45:53 0:1.778589 4.520u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648df446be0
14:45:53 0:1.778667 4.530u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648dd935030
14:45:54 0:2.242840 8.140u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x7f85b9757010
14:45:54 0:2.247728 8.200u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648dc8faa00
14:45:54 0:2.256726 8.280u 69908 opencl.c/CopyMagickCLCacheInfo/1552/User:
clEnqueueMapBuffer return pixels: 0x5648dc8faa00
14:46:12 0:20.409439 8.320u 69908 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x5648db646ae0
Abort was called at 250 line in file:
/build/intel-compute-runtime/src/compute-runtime-22.09.22577/shared/source/memory_manager/host_ptr_manager.cpp
Aborted (core dumped)
发现0x5648db646ae0指针在第三次调用clCreateBuffer时崩溃。怎么再次崩溃时的输出不一样：
$ gm display ~/temp/bg1a.jpg
15:09:02 0:1.357361 1.150u 71516 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55728b02e720
15:09:02 0:1.363826 1.210u 71516 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55728a1b9570
15:09:02 0:1.460255 1.810u 71516 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55728ce2e740
15:09:02 0:1.461296 1.830u 71516 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55728b341620
15:09:02 0:1.552602 2.460u 71516 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55728c1415d0
Abort was called at 250 line in file:
/build/intel-compute-runtime/src/compute-runtime-22.09.22577/shared/source/memory_manager/host_ptr_manager.cpp
Aborted (core dumped)
这次没有崩溃，但是却发现clEnqueueMapBuffer返回的指针被clCreateBuffer创建缓存却没有崩溃：
$ gm display ~/temp/bg1a.jpg
15:11:13 0:1.283573 1.150u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf5096990
15:11:13 0:1.289888 1.200u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf4161c00
15:11:13 0:1.385760 1.820u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf6296b20
15:11:13 0:1.392014 1.850u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf4161c00
15:11:14 0:1.479689 2.450u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf6296b20
15:11:14 0:1.485056 2.470u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf4161c00
15:11:14 0:1.581975 3.120u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf7296b60
15:11:14 0:1.582017 3.120u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf528a550
15:11:14 0:1.700207 4.010u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf8196bc0
15:11:14 0:1.700267 4.010u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf528a550
15:11:14 0:1.816203 4.880u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf8196bc0
15:11:14 0:1.816260 4.880u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf528a550
15:11:14 0:2.285724 8.520u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x7fe42d322010
15:11:14 0:2.290441 8.550u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf54eb600
15:11:14 0:2.300859 8.630u 71783 opencl.c/CopyMagickCLCacheInfo/1552/User:
clEnqueueMapBuffer return pixels: 0x55dcf54eb600
15:11:25 0:13.121552 8.660u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf5570380
15:11:25 0:13.135136 8.670u 71783 opencl.c/CopyMagickCLCacheInfo/1552/User:
clEnqueueMapBuffer return pixels: 0x55dcf5570380
15:11:25 0:13.291565 8.680u 71783 opencl.c/AcquireMagickCLCacheInfo/569/User:
clCreateBuffer pixels: 0x55dcf54eb600
15:11:25 0:13.300287 8.690u 71783 opencl.c/CopyMagickCLCacheInfo/1552/User:
clEnqueueMapBuffer return pixels: 0x55dcf54eb600
这跟上面链接的说法不符呀！难道是因为clEnqueueMapBuffer中没有使用CL_USE_HOST_PTR标记？所以不存在上面所说的这个问题？
怪事儿，我为什么没有在cl.h里找到CL_USE_HOST_PTR的定义？
在ImageMagick上添加了相同的输出代码，表现和上面的类似，但ImageMagick却能工作的很好，看来得从其它方法再入手了。
注：ImageMagick的日志配置文件：usr/local/etc/ImageMagick-7/log.xml。
见commit：magick/opencl.c。