1.檢查系統(tǒng)總內(nèi)存

liuhx@uc ~ $ adb shell cat /proc/meminfo

MemTotal:???????? 840868 kB

MemFree:????????? 457344 kB

Buffers:??????????? 1744 kB

Cached:?????????? 203064 kB

SwapCached:??????????? 0 kB

Active:?????????? 234932 kB

Inactive:???????? 129644 kB

Active(anon):???? 170292 kB

Inactive(anon):??????? 0 kB

Active(file):????? 64640 kB

Inactive(file):?? 129644 kB

Unevictable:?????????? 0 kB

Mlocked:?????????????? 0 kB

SwapTotal:???????????? 0 kB

SwapFree:????????????? 0 kB

Dirty:???????????????? 0 kB

Writeback:???????????? 0 kB

AnonPages:??????? 159820 kB

Mapped:??????????? 97916 kB

Slab:?????????????? 7808 kB

SReclaimable:?????? 2920 kB

SUnreclaim:???????? 4888 kB

PageTables:???????? 3516 kB

NFS_Unstable:????????? 0 kB

Bounce:??????????????? 0 kB

WritebackTmp:????????? 0 kB

CommitLimit:????? 420432 kB

Committed_AS:??? 1295272 kB

VmallocTotal:???? 122880 kB

VmallocUsed:?????? 16508 kB

VmallocChunk:????? 76804 kB

第一行MemTotal就是總內(nèi)存。一般并不會(huì)等于手機(jī)標(biāo)榜的數(shù)值。說是2G內(nèi)存的手機(jī)，會(huì)在1.8G左右

2.檢查某個(gè)程序的各類型內(nèi)存占用

可用dumpsys meminfo 包名。不知道包名的話，可以用ps命令得到所有運(yùn)行的程序，也包括得到pid。以自帶的瀏覽器為例：

liuhx@uc ~ $ adb shell dumpsys meminfo com.android.browser

Applications Memory Usage (kB):

Uptime: 23140065 Realtime: 23140065

** MEMINFO in pid 939 [com.android.browser] **

Shared? Private???? Heap???? Heap???? Heap

Pss??? Dirty??? Dirty???? Size??? Alloc???? Free

------?? ------?? ------?? ------?? ------?? ------

Native???? 7111????? 748???? 7048???? 8964???? 8634????? 329

Dalvik???? 7338???? 5096???? 6892???? 7568???? 7041????? 527

Cursor??????? 0??????? 0??????? 0

Ashmem????? 276??????? 0????? 276

Other dev??????? 4??????? 0??????? 0

.so mmap???? 5050???? 1728????? 252

.jar mmap??????? 0??????? 0??????? 0

.apk mmap????? 418??????? 0??????? 0

.ttf mmap????? 439??????? 0??????? 0

.dex mmap??????? 0??????? 0??????? 0

Other mmap???? 2320?????? 16?????? 24

Unknown???? 5173?????? 12???? 5172

TOTAL??? 28129???? 7600??? 19664??? 16532??? 15675????? 856

Objects

Views:????? 104???????? ViewRootImpl:??????? 1

AppContexts:??????? 4?????????? Activities:??????? 1

Assets:??????? 2??????? AssetManagers:??????? 2

Local Binders:?????? 15??????? Proxy Binders:?????? 19

Death Recipients:??????? 0

OpenSSL Sockets:??????? 0

SQL

MEMORY_USED:???? 1468

PAGECACHE_OVERFLOW:????? 899????????? MALLOC_SIZE:????? 168

DATABASES

pgsz???? dbsz?? Lookaside(b)????????? cache? Dbname

4???? 1180???????????? 68??????? 54/55/9? /data/data/com.android.browser/databases/browser2.db

4???? 1180???????????? 25???????? 1/60/2? /data/data/com.android.browser/databases/browser2.db (2)

4???? 1180???????????? 65??????? 90/23/7? /data/data/com.android.browser/databases/browser2.db (1)

4?????? 40???????????? 18???????? 0/15/1? /data/data/com.android.browser/databases/webview.db

Asset Allocations

zip:/system/app/Browser.apk:/resources.arsc: 881K

dumpsys的輸出結(jié)果在不同版本的android系統(tǒng)可能不同。

其中Pss Total是程序占用的PSS。

3.檢查程序狀態(tài)

liuhx@uc ~ $ adb shell cat /proc/939/status

Name:?android.browser

State:?S (sleeping)

Tgid:?939

Pid:?939

PPid:?38

TracerPid:?0

Uid:?10013?10013?10013?10013

Gid:?10013?10013?10013?10013

FDSize:?256

Groups:?1015 1028 3003 50013

VmPeak:?? 215504 kB

VmSize:?? 206780 kB

VmLck:??????? 0 kB

VmHWM:??? 52108 kB

VmRSS:??? 47748 kB

VmData:??? 53616 kB

VmStk:?????? 84 kB

VmExe:??????? 8 kB

VmLib:??? 29300 kB

VmPTE:????? 156 kB

Threads:?29

SigQ:?0/6656

SigPnd:?0000000000000000

ShdPnd:?0000000000000000

SigBlk:?0000000000001204

SigIgn:?0000000000000000

SigCgt:?00000002000094e8

CapInh:?0000000000000000

CapPrm:?0000000000000000

CapEff:?0000000000000000

CapBnd:?fffffffffffffeff

voluntary_ctxt_switches:?451

nonvoluntary_ctxt_switches:?3563

VmRss是程序占用的RSS

4.檢查程序各部分的內(nèi)存占用。

cat /proc/939/smaps

這個(gè)命令的輸出結(jié)果很長，下面是一部分結(jié)果：

4b399000-4b39b000 r--p 0001d000 1f:00 560??????? /system/lib/libGLESv1_enc.so

Size:????????????????? 8 kB

Rss:?????????????????? 8 kB

Pss:?????????????????? 8 kB

Shared_Clean:????????? 0 kB

Shared_Dirty:????????? 0 kB

Private_Clean:???????? 0 kB

Private_Dirty:???????? 8 kB

Referenced:??????????? 8 kB

Swap:????????????????? 0 kB

KernelPageSize:??????? 4 kB

MMUPageSize:?????????? 4 kB

4b39b000-4b39c000 rw-p 0001f000 1f:00 560??????? /system/lib/libGLESv1_enc.so

Size:????????????????? 4 kB

Rss:?????????????????? 4 kB

Pss:?????????????????? 4 kB

Shared_Clean:????????? 0 kB

Shared_Dirty:????????? 0 kB

Private_Clean:???????? 0 kB

Private_Dirty:???????? 4 kB

Referenced:??????????? 4 kB

Swap:????????????????? 0 kB

KernelPageSize:??????? 4 kB

MMUPageSize:?????????? 4 kB

總結(jié)

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