Android系统检测程序内存占用各种方法

1.检查系统总内存

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就是总内存。一般并不会等于手机标榜的数值。说是2G内存的手机，会在1.8G左右

2.检查某个程序的各类型内存占用

可用dumpsys meminfo 包名。不知道包名的话，可以用ps命令得到所有运行的程序，也包括得到pid。以自带的浏览器为例：

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的输出结果在不同版本的android系统可能不同。

其中Pss Total是程序占用的PSS。

3.检查程序状态

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.检查程序各部分的内存占用。

cat /proc/939/smaps

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