AndroidStudio-Profile工具导致的一个奇怪问题
在使用AndroidStudio里面的Profile查看内存占用时，发现一个奇怪的现象：
应用启动后Native内存猛增，即使一个空的App也是如此，按理说不应该。于是用adb工具导出了一次内存：
adb shell dumpsys meminfo top.vimerzhao.pureandroid [14:30:29]
Applications Memory Usage (in Kilobytes):
Uptime: 2823489068 Realtime: 5348646182
** MEMINFO in pid 17960 [top.vimerzhao.pureandroid] **
Pss Private Private SwapPss Heap Heap Heap
Total Dirty Clean Dirty Size Alloc Free
------ ------ ------ ------ ------ ------ ------
Native Heap 5347 5320 0 149 22528 18049 4478
Dalvik Heap 0 0 0 0 3231 1616 1615
Stack 76 76 0 0
Ashmem 13 0 12 0
Gfx dev 248 248 0 0
Other dev 2 0 0 0
.so mmap 1328 188 332 14
.apk mmap 193 0 56 0
.ttf mmap 88 0 20 0
.dex mmap 3450 16 2496 0
.oat mmap 68 0 4 0
.art mmap 7587 6736 480 84
Other mmap 8 4 0 0
EGL mtrack 16440 16440 0 0
GL mtrack 3340 3340 0 0
Unknown 5000 4088 852 27
TOTAL 43462 36456 4252 274 25759 19665 6093
App Summary
Pss(KB)
------
Java Heap: 7216
Native Heap: 5320
Code: 3112
Stack: 76
Graphics: 20028
Private Other: 4956
System: 2754
TOTAL: 43462 TOTAL SWAP PSS: 274
Objects
Views: 16 ViewRootImpl: 1
AppContexts: 5 Activities: 1
Assets: 5 AssetManagers: 0
Local Binders: 12 Proxy Binders: 30
Parcel memory: 3 Parcel count: 13
Death Recipients: 2 OpenSSL Sockets: 0
WebViews: 0
SQL
MEMORY_USED: 0
PAGECACHE_OVERFLOW: 0 MALLOC_SIZE: 0再在启用Profile观察的同时导出一次内存：
adb shell dumpsys meminfo top.vimerzhao.pureandroid [14:31:01]
Applications Memory Usage (in Kilobytes):
Uptime: 2823564651 Realtime: 5348721765
** MEMINFO in pid 18399 [top.vimerzhao.pureandroid] **
Pss Private Private SwapPss Heap Heap Heap
Total Dirty Clean Dirty Size Alloc Free
------ ------ ------ ------ ------ ------ ------
Native Heap 47866 47844 0 149 63488 54816 8673
Dalvik Heap 0 0 0 0 3281 1641 1640
Stack 76 76 0 0
Ashmem 13 0 12 0
Gfx dev 252 252 0 0
Other dev 2 0 0 0
.so mmap 4202 2380 868 14
.apk mmap 221 0 80 0
.ttf mmap 88 0 20 0
.dex mmap 6691 16 5192 0
.oat mmap 131 0 16 0
.art mmap 7698 6864 472 85
Other mmap 8 4 0 0
EGL mtrack 16440 16440 0 0
GL mtrack 3336 3336 0 0
Unknown 6519 5608 852 27
TOTAL 93818 82820 7512 275 66769 56457 10313
App Summary
Pss(KB)
------
Java Heap: 7336
Native Heap: 47844
Code: 8572
Stack: 76
Graphics: 20028
Private Other: 6476
System: 3486
TOTAL: 93818 TOTAL SWAP PSS: 275
Objects
Views: 16 ViewRootImpl: 1
AppContexts: 5 Activities: 1
Assets: 6 AssetManagers: 0
Local Binders: 12 Proxy Binders: 30
Parcel memory: 3 Parcel count: 12
Death Recipients: 2 OpenSSL Sockets: 0
WebViews: 0
SQL
MEMORY_USED: 0
PAGECACHE_OVERFLOW: 0 MALLOC_SIZE: 0看起来是因为Profile这个工具导致的，应该是出于监控需要，但是底层原理暂时也不清楚，故只能做如此猜测了，可惜。
