Hi,
I have written a program that collects application memory usage at specific
interval through ActivityManager. In ICS, the program works just fine, but
in JB, it seems that the native pss information queried from AM are wrong.
They seems to be too low, usually below 40kB and remain that low regardless
of what the applications being monitored are doing.
I also tried to run "adb shell dumpsys meminfo system" on both Galaxy Nexus
ICS and JB and the outputs seem to show the same issue observed in the
native memory data queried from AM.
- In ICS
Applications Memory Usage (kB):
Uptime: 63638 Realtime: 63628
** MEMINFO in pid 182 [system] **
Shared Private Heap Heap Heap
Pss Dirty Dirty Size Alloc Free
------ ------ ------ ------ ------ ------
Native 3393 744 3368 13116 10245 578
Dalvik 11339 14060 10868 20487 20139 348
Cursor 12 0 12
Ashmem 54 28 40
Other dev 20581 9032 892
.so mmap 4638 1784 1508
.jar mmap 0 0 0
.apk mmap 1356 0 0
.ttf mmap 436 0 0
.dex mmap 0 0 0
Other mmap 3422 8 28
Unknown 5800 176 5796
TOTAL 51031 25832 22512 33603 30384 926
...
- In JB:
$ adb shell dumpsys meminfo system
Applications Memory Usage (kB):
Uptime: 11835289 Realtime: 71935566
** MEMINFO in pid 560 [system] **
Shared Private Heap Heap Heap
Pss Dirty Dirty Size Alloc Free
------ ------ ------ ------ ------ ------
Native 4817 428 4772 18272 13598 1641
Dalvik 16321 6944 16140 24803 20546 4257
Cursor 12 0 12
Ashmem 30 52 4
Other dev 3020 52 3016
.so mmap 1850 528 992
.jar mmap 0 0 0
.apk mmap 147 0 0
.ttf mmap 14 0 0
.dex mmap 2743 360 236
Other mmap 2791 4 20
Unknown 2381 76 2264
TOTAL 34126 8444 27456 43075 34144 5898
...
Does anyone know if this is the expected behavior or potentially issue in
JB? If this is the correct behavior for AM and dumpsys in JB, is there
another way to get the native memory usage in JB? Thanks.
Regards,
Hendra
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