能够列出进程所占用的内存使用情况。顺序为从高到低。
每个进程占用内存大小以 VSS, RSS , PSS, USS 的形式列出。
为了简化描述,内存占用以页为单位表述,而不是字节。 通常每页为 4096 字节。
VSS ( 等同于 ps 命令列出的 VSZ) 是单个进程全部可访问的地址空间。
其大小包括可能还尚未在内存中驻留的部分。比如地址空间已经被 malloc 分配,但是还没有实际写入。
对于确定单个进程实际内存使用大小, VSS 用处不大。
RSS 是单个进程实际占用的内存大小。
RSS 易被误导的原因在于, 它包括了该进程所使用的所有共享库的全部内存大小。对于单个共享库, 尽管无论多少个进程使用,
实际该共享库只会被装入内存一次。
对于单个进程的内存使用大小, RSS 不是一个精确的描述。
PSS 不同于RSS,它只是按比例包含其所使用的共享库大小。
例如, 三个进程使用同一个占用 30 内存页的共享库。 对于三个进程中的任何一个,PSS 将只包括 10 个内存页。
PSS 是一个非常有用的数字,因为系统中全部进程以整体的方式被统计, 对于系统中的整体内存使用是一个很好的描述。
如果一个进程被终止, 其PSS 中所使用的共享库大小将会重新按比例分配给剩下的仍在运行并且仍在使用该共享库的进程。
此种计算方式有轻微的误差,因为当某个进程中止的时候, PSS 没有精确的表示被返还给整个系统的内存大小。
USS 是单个进程的全部私有内存大小。亦即全部被该进程独占的内存大小。
USS 是一个非常非常有用的数字, 因为它揭示了运行一个特定进程的真实的内存增量大小。
如果进程被终止, USS 就是实际被返还给系统的内存大小。
USS 是针对某个进程开始有可疑内存泄露的情况,进行检测的最佳数字。
shell@xxxxxxxxxx:/ # procrank PID Vss Rss Pss Uss cmdline 1645 462296K 101904K 75617K 73092K com.oslauncher 1944 437272K 76368K 36017K 25136K com.dangbeimarket 10745 362920K 48664K 23951K 21948K com.audiocn.kalaok.tv 1426 414912K 50272K 22969K 19336K system_server 1010 419416K 18056K 17332K 17100K /applications/bin/tvos 987 73360K 18992K 13801K 12400K /system/bin/mediaserver 10475 391460K 40152K 13667K 11724K com.android.launcher 985 308084K 43976K 13366K 8300K zygote 10437 345864K 35064K 12858K 11500K com.android.mediacenter 4185 326280K 33972K 12737K 11332K com.android.systemui:screenshot 10943 344080K 32092K 9533K 7996K com.android.ctvmenu 1525 348232K 31180K 7838K 6064K com.android.tv.tvplayer.ui 1738 359820K 29932K 7342K 5584K com.android.systemui 1616 331056K 28048K 6835K 5604K com.android.inputmethod.pinyin 1504 342164K 27664K 6604K 5264K com.android.tv.service 11064 328920K 26140K 5882K 4884K com.android.wididemo 1777 332604K 24988K 5775K 4568K com.android.phone 1603 323256K 25200K 5451K 4208K android.process.media 1815 323020K 23572K 5061K 4104K android.process.acore 10845 340276K 27132K 5001K 3720K com.android.documentsui 1552 334240K 22200K 4293K 3448K com.android.android.providers.tv 1960 323592K 22356K 3614K 2208K com.dangbeimarket:BackInstallService 10814 335636K 23920K 3564K 2548K com.egame.tvmodel 1901 326248K 23860K 3132K 2172K com.android.mcastdemo 984 77540K 6576K 2572K 1820K /system/bin/surfaceflinger 1632 318084K 19276K 2246K 1496K com.broadcom.bluetoothmonitor 5552 319036K 17868K 1940K 1264K com.android.defcontainer 1659 318256K 18184K 1934K 1208K com.android.printspooler 15579 2696K 2140K 1921K 1916K procrank 1997 320424K 18564K 1914K 1100K com.dangbeimarket:MonitorService 1690 316972K 18084K 1895K 1188K com.android.externalstorage 995 28200K 5188K 1855K 1224K /system/bin/livecap 2402 317096K 17128K 1531K 860K com.mstar.tvsetting.hotkey 986 14872K 4320K 1449K 988K /system/bin/drmserver 1797 316916K 17220K 1427K 748K com.android.smspush 998 14116K 3720K 1331K 1012K /system/bin/mtkbt 979 5948K 1572K 680K 572K /system/bin/vold 994 27868K 2188K 665K 296K /system/bin/virtualkeypad 982 9780K 1232K 562K 484K /system/bin/netd 992 3368K 1196K 471K 384K /system/bin/keystore 1929 1304K 724K 453K 444K /system/bin/mdnsd 1 588K 428K 334K 268K /init 981 4580K 908K 330K 296K /system/bin/resourcemanager 996 4360K 684K 221K 204K /system/bin/browserserver 980 3540K 488K 214K 208K /system/bin/sdcard 983 1072K 532K 193K 180K /system/bin/debuggerd 988 1028K 472K 185K 176K /system/bin/installd 11660 932K 488K 181K 128K sh 3582 1020K 468K 179K 172K /system/bin/dhcpcd 3078 928K 480K 173K 120K sh 1002 1504K 184K 172K 172K /sbin/adbd 1001 924K 460K 167K 116K /system/bin/sh 665 520K 224K 156K 92K /sbin/ueventd 11179 932K 424K 152K 144K logcat 977 1424K 140K 136K 136K /sbin/healthd 978 1028K 344K 117K 112K /system/bin/servicemanager 993 880K 344K 109K 104K /system/bin/logwrapper ------ ------ ------ 350132K 293872K TOTAL RAM: 840500K total, 55164K free, 46500K buffers, 203836K cached, 8708K shmem, 24768K slab
shell@cv6a628h_base:/ # dumpsys meminfo Applications Memory Usage (kB): Uptime: 4143500 Realtime: 4143500 Total PSS by process: 67094 kB: com.oslauncher (pid 1824 / activities) 31293 kB: com.dangbeimarket (pid 2140 / activities) 23305 kB: com.starcor.hunan (pid 4716) 22324 kB: system (pid 1445) 17890 kB: mb.gamenet (pid 2348 / activities) 17853 kB: com.cultraview.mediacenter (pid 2783 / activities) 17539 kB: tvos (pid 1006) 14164 kB: com.android.launcher (pid 2304 / activities) 13053 kB: zygote (pid 986) 12767 kB: com.audiocn.kalaok.tv (pid 4588 / activities) 10275 kB: com.cultraview.ctvmenu (pid 3039 / activities) 7454 kB: com.mstar.tv.tvplayer.ui (pid 1792 / activities) 7071 kB: com.android.systemui (pid 1897) 7022 kB: mediaserver (pid 988) 6338 kB: com.mstar.tv.service (pid 1647) 6311 kB: android.process.media (pid 1627) 5978 kB: com.android.phone (pid 1945) 5799 kB: com.android.documentsui (pid 2603) 4961 kB: android.process.acore (pid 1983) 4766 kB: com.android.wididemo (pid 2729) 3893 kB: com.android.inputmethod.pinyin (pid 1713) 3662 kB: com.egame.tvmodel (pid 2543 / activities) 3639 kB: com.mstar.android.providers.tv (pid 1726) 3464 kB: com.dangbeimarket:BackInstallService (pid 2157) 2726 kB: com.android.mcastdemo (pid 2069) 2613 kB: surfaceflinger (pid 985) 2009 kB: com.broadcom.bluetoothmonitor (pid 1739) 1830 kB: com.android.printspooler (pid 1777) 1811 kB: com.dangbeimarket:MonitorService (pid 2193) 1808 kB: livecap (pid 996) 1771 kB: com.android.externalstorage (pid 1850) 1660 kB: com.android.provision (pid 1754) 1415 kB: drmserver (pid 987) 1346 kB: com.android.smspush (pid 1965) 1306 kB: mtkbt (pid 999) 1160 kB: logcat (pid 4754) 678 kB: vold (pid 980) 663 kB: virtualkeypad (pid 995) 578 kB: netd (pid 983) 468 kB: keystore (pid 993) 451 kB: mdnsd (pid 2125) 338 kB: /init (pid 1) 331 kB: resourcemanager (pid 982) 214 kB: browserserver (pid 997) 208 kB: sdcard (pid 981) 201 kB: sh (pid 2226) 193 kB: sh (pid 1002) 190 kB: debuggerd (pid 984) 176 kB: adbd (pid 1003) 176 kB: dumpsys (pid 6590) 173 kB: installd (pid 989) 160 kB: ueventd (pid 665) 140 kB: healthd (pid 978) 115 kB: servicemanager (pid 979) 112 kB: logwrapper (pid 994) Total PSS by OOM adjustment: 51481 kB: Native 17539 kB: tvos (pid 1006) 13053 kB: zygote (pid 986) 7022 kB: mediaserver (pid 988) 2613 kB: surfaceflinger (pid 985) 1808 kB: livecap (pid 996) 1415 kB: drmserver (pid 987) 1306 kB: mtkbt (pid 999) 1160 kB: logcat (pid 4754) 678 kB: vold (pid 980) 663 kB: virtualkeypad (pid 995) 578 kB: netd (pid 983) 468 kB: keystore (pid 993) 451 kB: mdnsd (pid 2125) 338 kB: /init (pid 1) 331 kB: resourcemanager (pid 982) 214 kB: browserserver (pid 997) 208 kB: sdcard (pid 981) 201 kB: sh (pid 2226) 193 kB: sh (pid 1002) 190 kB: debuggerd (pid 984) 176 kB: adbd (pid 1003) 176 kB: dumpsys (pid 6590) 173 kB: installd (pid 989) 160 kB: ueventd (pid 665) 140 kB: healthd (pid 978) 115 kB: servicemanager (pid 979) 112 kB: logwrapper (pid 994) 22324 kB: System 22324 kB: system (pid 1445) 14658 kB: Persistent 6338 kB: com.mstar.tv.service (pid 1647) 6311 kB: android.process.media (pid 1627) 2009 kB: com.broadcom.bluetoothmonitor (pid 1739) 70733 kB: Foreground 67094 kB: com.oslauncher (pid 1824 / activities) 3639 kB: com.mstar.android.providers.tv (pid 1726) 7071 kB: Visible 7071 kB: com.android.systemui (pid 1897) 3893 kB: Perceptible 3893 kB: com.android.inputmethod.pinyin (pid 1713) 7454 kB: Previous 7454 kB: com.mstar.tv.tvplayer.ui (pid 1792 / activities) 33820 kB: B Services 23305 kB: com.starcor.hunan (pid 4716) 5978 kB: com.android.phone (pid 1945) 2726 kB: com.android.mcastdemo (pid 2069) 1811 kB: com.dangbeimarket:MonitorService (pid 2193) 133501 kB: Cached 31293 kB: com.dangbeimarket (pid 2140 / activities) 17890 kB: mb.gamenet (pid 2348 / activities) 17853 kB: com.cultraview.mediacenter (pid 2783 / activities) 14164 kB: com.android.launcher (pid 2304 / activities) 12767 kB: com.audiocn.kalaok.tv (pid 4588 / activities) 10275 kB: com.cultraview.ctvmenu (pid 3039 / activities) 5799 kB: com.android.documentsui (pid 2603) 4961 kB: android.process.acore (pid 1983) 4766 kB: com.android.wididemo (pid 2729) 3662 kB: com.egame.tvmodel (pid 2543 / activities) 3464 kB: com.dangbeimarket:BackInstallService (pid 2157) 1830 kB: com.android.printspooler (pid 1777) 1771 kB: com.android.externalstorage (pid 1850) 1660 kB: com.android.provision (pid 1754) 1346 kB: com.android.smspush (pid 1965) Total PSS by category: 107941 kB: Dalvik 52961 kB: Unknown 49486 kB: .so mmap 38762 kB: .dex mmap 37860 kB: Ashmem 35996 kB: Dalvik Other 9990 kB: Other mmap 4515 kB: .apk mmap 2964 kB: Native 2196 kB: .ttf mmap 1304 kB: Other dev 792 kB: Stack 164 kB: .jar mmap 4 kB: Cursor 0 kB: code mmap 0 kB: image mmap 0 kB: Graphics 0 kB: GL 0 kB: Memtrack Total RAM: 840500 kB Free RAM: 478961 kB (133501 cached pss + 227268 cached + 118192 free) Used RAM: 251974 kB (211434 used pss + 17152 buffers + 548 shmem + 22840 slab) Lost RAM: 109565 kB ZRAM: 4 kB physical used for 0 kB in swap (102396 kB total swap) KSM: 46860 kB saved from shared 11324 kB 215852 kB unshared; 325484 kB volatile Tuning: 64 (large 128), oom 91340 kB, restore limit 30446 kB (low-ram)
shell@cv6a628h_base:/ # dumpsys meminfo com.android.systemui Applications Memory Usage (kB): Uptime: 4250893 Realtime: 4250893 ** MEMINFO in pid 1897 [com.android.systemui] ** Pss Private Private Swapped Heap Heap Heap Total Dirty Clean Dirty Size Alloc Free ------ ------ ------ ------ ------ ------ ------ Native Heap 0 0 0 0 3268 2127 88 Dalvik Heap 1738 1628 0 0 5544 4128 1416 Dalvik Other 1376 1212 0 0 Stack 28 28 0 0 Other dev 8 0 8 0 .so mmap 769 472 0 0 .apk mmap 776 0 652 0 .ttf mmap 98 0 68 0 .dex mmap 1194 12 664 0 Other mmap 12 8 0 0 Unknown 1072 1036 0 0 TOTAL 7071 4396 1392 0 8812 6255 1504 Objects Views: 51 ViewRootImpl: 1 AppContexts: 7 Activities: 0 Assets: 5 AssetManagers: 5 Local Binders: 32 Proxy Binders: 29 Death Recipients: 0 OpenSSL Sockets: 0 SQL MEMORY_USED: 0 PAGECACHE_OVERFLOW: 0 MALLOC_SIZE: 0