adb 打印終端中內存使用情況的方法

在調試一些內存相關的問題時，我們通常需要實時打印出當前系統中所使用的內存信息。

下面提供兩種方法來查看這些信息。

方式一，使用 adb shell dumpsys meminfo

使用示例：

C:\Users\Administrator>adb shell dumpsys meminfo
Applications Memory Usage (kB):
Uptime: 14868066 Realtime: 21560285

Total PSS by process:
    35958 kB: system (pid 463)
    30518 kB: com.bbk.launcher2 (pid 824)
    26253 kB: com.android.systemui (pid 630)
    20983 kB: com.android.settings (pid 7366)
    10239 kB: com.android.phone (pid 706)
     9986 kB: com.tencent.qqpimsecure (pid 893)
     9326 kB: com.iqoo.ime.service (pid 685)
     8962 kB: android.process.media (pid 796)
     7418 kB: com.sohu.sohuvideo:log_service (pid 6695)
     7140 kB: com.ting.mp3.oemc.android:pushservice_v1 (pid 6502)
     7074 kB: com.mediatek.bluetooth (pid 716)
     7062 kB: com.sina.weibo (pid 2429)
     7033 kB: android.process.acore (pid 1150)
     6288 kB: com.sina.weibo.servant (pid 5979)
     5898 kB: com.eg.android.AlipayGphone (pid 3473)
     5435 kB: com.android.ActivityNetwork (pid 6621)
     5327 kB: com.tencent.mm (pid 6553)
     5281 kB: com.android.bbkmusic (pid 1322)
     4559 kB: com.netease.pris:push (pid 7126)
     4445 kB: com.android.mms (pid 6463)
     4392 kB: com.mediatek.mdlogger (pid 725)
     4347 kB: com.baidu.map.location:remote (pid 843)
     4275 kB: com.mediatek.mobilelog (pid 7063)
     4254 kB: com.android.contacts (pid 857)
     3993 kB: com.bbk.appstore (pid 7262)
     3854 kB: com.mediatek.MediatekDM (pid 6281)
     3667 kB: com.android.keychain (pid 7276)
     3623 kB: com.baidu.map.location (pid 784)
     3387 kB: com.mediatek.atci.service (pid 7110)
     3359 kB: com.android.bbksoundrecorder (pid 746)
     3265 kB: com.svox.pico (pid 7332)
     3261 kB: com.android.defcontainer (pid 6448)

Total PSS by OOM adjustment:
    35958 kB: System
               35958 kB: system (pid 463)
    63631 kB: Persistent
               26253 kB: com.android.systemui (pid 630)
               10239 kB: com.android.phone (pid 706)
                7074 kB: com.mediatek.bluetooth (pid 716)
                7033 kB: android.process.acore (pid 1150)
                5281 kB: com.android.bbkmusic (pid 1322)
                4392 kB: com.mediatek.mdlogger (pid 725)
                3359 kB: com.android.bbksoundrecorder (pid 746)
    29945 kB: Foreground
               20983 kB: com.android.settings (pid 7366)
                8962 kB: android.process.media (pid 796)
    27841 kB: Perceptible
                9986 kB: com.tencent.qqpimsecure (pid 893)
                9326 kB: com.iqoo.ime.service (pid 685)
                4275 kB: com.mediatek.mobilelog (pid 7063)
                4254 kB: com.android.contacts (pid 857)
    14255 kB: A Services
                7140 kB: com.ting.mp3.oemc.android:pushservice_v1 (pid 6502)
                3854 kB: com.mediatek.MediatekDM (pid 6281)
                3261 kB: com.android.defcontainer (pid 6448)
    30518 kB: Home
               30518 kB: com.bbk.launcher2 (pid 824)
    27087 kB: B Services
                7418 kB: com.sohu.sohuvideo:log_service (pid 6695)
                6288 kB: com.sina.weibo.servant (pid 5979)
                5435 kB: com.android.ActivityNetwork (pid 6621)
                4559 kB: com.netease.pris:push (pid 7126)
                3387 kB: com.mediatek.atci.service (pid 7110)
    41627 kB: Background
                7062 kB: com.sina.weibo (pid 2429)
                5898 kB: com.eg.android.AlipayGphone (pid 3473)
                5327 kB: com.tencent.mm (pid 6553)
                4445 kB: com.android.mms (pid 6463)
                4347 kB: com.baidu.map.location:remote (pid 843)
                3993 kB: com.bbk.appstore (pid 7262)
                3667 kB: com.android.keychain (pid 7276)
                3623 kB: com.baidu.map.location (pid 784)
                3265 kB: com.svox.pico (pid 7332)

Total PSS by category:
   145990 kB: Dalvik
    44471 kB: Unknown
    35557 kB: Other dev
    24404 kB: .so mmap
    14348 kB: .dex mmap
     3830 kB: Other mmap
     1214 kB: .apk mmap
      524 kB: Native
      424 kB: .ttf mmap
       68 kB: Ashmem
       32 kB: Cursor
        0 kB: .jar mmap

Total PSS: 270862 kB
      KSM: 0 kB saved from shared 0 kB
           0 kB unshared; 0 kB volatile

方式二：使用 adb shell procrank 命令

使用示例：

C:\Users\Administrator>adb shell procrank
  PID      Vss      Rss      Pss      Uss  cmdline
  463   61772K   61704K   36103K   32180K  system_server
  824   55208K   55112K   30643K   29204K  com.bbk.launcher2
  630   54492K   54376K   26423K   21896K  com.android.systemui
 7366   48596K   48492K   20979K   17016K  com.android.settings
  112   32696K   29692K   20346K   12720K  /system/bin/surfaceflinger
  706   32244K   32192K   10338K    9560K  com.android.phone
  893   32108K   32084K   10126K    9324K  com.tencent.qqpimsecure
  117   10984K   10952K    9742K    9512K  /system/bin/mediaserver
  685   31004K   30952K    9420K    8704K  com.iqoo.ime.service
  796   31516K   31456K    9057K    8224K  android.process.media
 6695   30332K   30304K    7490K    6488K  com.sohu.sohuvideo:log_service
 6502   29896K   29868K    7215K    6232K  com.ting.mp3.oemc.android:pushservice_v1
  716   29564K   29508K    7174K    6332K  com.mediatek.bluetooth
 2429   29612K   29584K    7157K    6352K  com.sina.weibo
 1150   29404K   29352K    7127K    6380K  android.process.acore
 5979   29196K   29168K    6380K    5548K  com.sina.weibo.servant
 3473   28424K   28396K    5992K    5208K  com.eg.android.AlipayGphone
 6553   28108K   28068K    5396K    4480K  com.tencent.mm
 1322   27544K   27488K    5375K    4624K  com.android.bbkmusic
 6621   27204K   27172K    4781K    3996K  com.android.ActivityNetwork
  725   26372K   26308K    4620K    3920K  com.mediatek.mdlogger
 7126   26968K   26912K    4605K    3868K  com.netease.pris:push
 6463   26996K   26944K    4534K    3788K  com.android.mms
  843   26172K   26120K    4441K    3648K  com.baidu.map.location:remote
  857   26024K   25972K    4349K    3648K  com.android.contacts
 7063   26664K   26600K    4347K    3636K  com.mediatek.mobilelog
 7262   26988K   26928K    4043K    3296K  com.bbk.appstore
 6281   26432K   26368K    3948K    3192K  com.mediatek.MediatekDM
  784   25524K   25460K    3718K    2988K  com.baidu.map.location
 7276   26624K   26556K    3716K    2960K  com.android.keychain
  746   25268K   25200K    3450K    2720K  com.android.bbksoundrecorder
 7110   25944K   25876K    3438K    2720K  com.mediatek.atci.service
 6448   25772K   25708K    3354K    2596K  com.android.defcontainer
 7332   25812K   25748K    3311K    2600K  com.svox.pico
  113   24144K   24064K    3116K    2308K  zygote
 8327    2544K    2544K    2244K    2224K  procrank
  116    2932K    2932K    2136K    2112K  /system/bin/drmserver
 1491    1968K    1968K    1354K    1328K  /system/bin/bbk_em_svr
  134    1996K    1996K    1278K    1264K  /system/bin/em_svr
  128    1848K    1844K    1266K    1252K  /system/bin/atcid
 1813    1468K    1468K    1177K    1172K  logcat
 7084    1836K    1836K    1090K    1012K  /system/bin/atci_service
  130    1336K    1336K     845K     828K  /system/bin/mtkbt
 3399    1020K    1020K     722K     716K  logcat
  421    1008K    1008K     559K     552K  /system/bin/rild
  118    1100K    1100K     522K     452K  /system/bin/mdpserver
 6970     896K     896K     477K     352K  /system/bin/netdiag
 5649     768K     768K     455K     448K  logcat
  109     784K     784K     435K     424K  /system/bin/netd
 7079     988K     988K     425K     384K  /system/bin/mobile_log_d
  131     868K     868K     402K     392K  /system/bin/mdpd
  124     760K     760K     397K     392K  /system/bin/mtk_agpsd
    1     492K     492K     386K     320K  /init
  101     672K     672K     352K     344K  /system/bin/vold
  401    1272K     708K     306K     300K  /system/bin/mdlogger
  106     716K     716K     278K     272K  /system/bin/vivo_daemon
  123     536K     536K     271K     268K  /system/bin/keystore
  400     528K     528K     251K     248K  /system/bin/gsm0710muxd
 8209     288K     288K     248K     248K  /sbin/adbd
  129     676K     676K     242K     236K  /system/bin/dm_agent_binder
  105     612K     612K     233K     228K  /system/bin/debuggerd
 8326     488K     484K     223K     204K  /system/bin/sh
  136     648K     648K     222K     216K  /system/bin/nvram_agent_binder
  114     440K     440K     181K     176K  /system/bin/hald
 7081     748K     748K     177K     136K  /system/bin/mobile_log_d
  110     592K     592K     177K      52K  /system/bin/netdiag
  102     524K     432K     171K     168K  /system/bin/ccci_fsd
 7080     728K     728K     165K     124K  /system/bin/mobile_log_d
 7083     700K     700K     152K     112K  /system/bin/mobile_log_d
 7082     708K     708K     151K     108K  /system/bin/mobile_log_d
  119     416K     416K     151K     148K  /system/bin/mtkGD
   65     220K     220K     150K      84K  /sbin/ueventd
 7179     460K     460K     147K     140K  logcat
  125     400K     400K     143K     140K  /system/bin/stp_dump3
  120     372K     368K     139K     136K  /system/bin/dbus-daemon
  122     424K     420K     131K     128K  /system/bin/installd
  100     324K     324K     118K     116K  /system/bin/servicemanager
  140     336K     332K     110K     108K  /system/bin/sh
  103     332K     332K     106K     104K  /system/bin/ccci_mdinit
 1222     356K     356K     103K     100K  /data/data/com.tencent.qqpimsecure/files/athena_v2.dat
  104     324K     324K     102K     100K  /system/bin/6620_launcher
  107     680K     680K      94K      52K  /system/bin/mobile_log_d
 1238     320K     316K      90K      88K  sh
 1229     316K     312K      90K      88K  sh
 1219     316K     312K      90K      88K  sh
                          ------   ------  ------
                         328033K  282552K  TOTAL

RAM: 482092K total, 3732K free, 4052K buffers, 110608K cached, 476K shmem, 24624K slab

方式二中能看出當前系統總共有多少內存，有多少空閒，有多少buffer，緩存等信息

當前使用這兩種方式的前提是 adb remount 能夠成功。

可以通過 adb shell kill PIDNumber 來殺死你想殺死的後臺進程來模擬某種 bug 的復現條件。

譬如 adb shell kill 630 就能殺死 com.android.systemui 這個進程，有興趣的可以嘗試一下，盯住手機屏幕看下有什麼反應……

adb shell ps 可以查看當前終端中的進程信息

C:\Users\Administrator>adb shell ps
USER     PID   PPID  VSIZE  RSS     WCHAN    PC         NAME
root      1     0     644    492   c0140624 0000fa38 S /init
root      2     0     0      0     c0083274 00000000 S kthreadd
root      3     2     0      0     c0069564 00000000 S ksoftirqd/0
root      6     2     0      0     c00c4a58 00000000 S migration/0
root      10    2     0      0     c007e778 00000000 S khelper
root      11    2     0      0     c007e778 00000000 S fs_sync
root      12    2     0      0     c007e778 00000000 S suspend
root      13    2     0      0     c0114cbc 00000000 S sync_supers
root      14    2     0      0     c0115d48 00000000 S bdi-default
root      15    2     0      0     c007e778 00000000 S kblockd
root      16    2     0      0     c02db5a8 00000000 S khubd
root      17    2     0      0     c007e778 00000000 S _mtkfb
root      18    2     0      0     c007e778 00000000 S cfg80211
root      20    2     0      0     c010de00 00000000 S kswapd0
root      21    2     0      0     c016b74c 00000000 S fsnotify_mark
root      22    2     0      0     c007e778 00000000 S crypto
root      42    2     0      0     c0071488 00000000 D binder_watchdog
root      43    2     0      0     c007e778 00000000 S binder
root      44    2     0      0     c007e778 00000000 S trace mon
root      45    2     0      0     c007e778 00000000 S g2d_workqueue
root      46    2     0      0     c007e778 00000000 S mtk_vibrator
root      47    2     0      0     c03ffc84 00000000 D pmic_thread_kth
root      48    2     0      0     c0411648 00000000 D bat_thread_kthr
root      49    2     0      0     c041079c 00000000 S mtk charger_hv_
root      50    2     0      0     c03ace00 00000000 S screen_update_k
root      51    2     0      0     c007e778 00000000 S non_sta
root      52    2     0      0     c007e778 00000000 S accdet
root      53    2     0      0     c007e778 00000000 S accdet_eint
root      54    2     0      0     c029fccc 00000000 S kworker/u:2
root      55    2     0      0     c007e778 00000000 S acc_sensor_eint
root      56    2     0      0     c03489bc 00000000 S mmcqd/0
root      57    2     0      0     c03489bc 00000000 S mmcqd/0boot0
root      58    2     0      0     c03489bc 00000000 S mmcqd/0boot1
root      60    2     0      0     c007e778 00000000 S deferwq
root      61    2     0      0     c007e778 00000000 S f_mtp
root      62    2     0      0     c0301eb0 00000000 S file-storage
root      63    2     0      0     c0071488 00000000 D wdtk-0
root      64    2     0      0     c0071488 00000000 D wdtk-1
root      65    2     0      0     c007e778 00000000 S 0-0038
root      66    1     424    220   c0140624 0000fa38 S /sbin/ueventd
root      68    2     0      0     c020a0e0 00000000 S jbd2/mmcblk0p4-
root      69    2     0      0     c007e778 00000000 S ext4-dio-unwrit
root      70    2     0      0     c02a1ac8 00000000 S loop0
root      71    2     0      0     c015679c 00000000 S flush-179:0
root      74    2     0      0     c020a0e0 00000000 S jbd2/mmcblk0p6-
root      75    2     0      0     c007e778 00000000 S ext4-dio-unwrit
root      80    2     0      0     c020a0e0 00000000 S jbd2/mmcblk0p5-
root      81    2     0      0     c007e778 00000000 S ext4-dio-unwrit
root      84    2     0      0     c020a0e0 00000000 S jbd2/mmcblk0p2-
root      85    2     0      0     c007e778 00000000 S ext4-dio-unwrit
root      86    2     0      0     c007e778 00000000 S pvr_timer
root      87    2     0      0     bf141a5c 00000000 S mtk_stp_psm
root      88    2     0      0     bf141a5c 00000000 S mtk_stp_btm
root      89    2     0      0     bf141868 00000000 S mtk_wmtd
root      90    2     0      0     c007e778 00000000 S fm_timer_wq
root      91    2     0      0     c007e778 00000000 S fm_eint_wq
system    93    1     1104   348   c0366868 400c8f74 S /system/bin/servicemanager
root      94    1     5016   668   ffffffff 400bd700 S /system/bin/vold
ccci      95    1     1400   440   bf091e48 40117f74 S /system/bin/ccci_fsd
system    96    1     1980   356   ffffffff 40128d3c S /system/bin/ccci_mdinit
system    97    1     960    352   c0140624 400a4ec8 S /system/bin/6620_launcher
root      98    1     1792   580   c0140624 4014bec8 S /system/bin/debuggerd
root      99    1     6708   640   ffffffff 40055f74 S /system/bin/vivo_daemon
shell     100   1     2696   596   ffffffff 4011b700 S /system/bin/mobile_log_d
root      102   1     11892  984   ffffffff 400a3700 S /system/bin/netd
radio     103   1     4536   576   ffffffff 401d9084 S /system/bin/netdiag
system    105   1     55108  24708 ffffffff 400e0f74 S /system/bin/surfaceflinger
root      106   1     286264 23048 ffffffff 400dd098 S zygote
system    107   1     3352   500   ffffffff 400e2700 S /system/bin/hald
drm       108   1     21300  2324  ffffffff 40194f74 S /system/bin/drmserver
media     109   1     62376  8236  ffffffff 40123f74 S /system/bin/mediaserver
system    110   1     7964   1128  ffffffff 400fef74 S /system/bin/mdpserver
system    111   1     1196   460   c0444894 400d6a04 S /system/bin/mtkGD
bluetooth 112   1     1644   392   c0140624 40158ec8 S /system/bin/dbus-daemon
root      114   1     1160   444   c04fd670 400edd3c S /system/bin/installd
keystore  115   1     2148   712   c0444894 40076a04 S /system/bin/keystore
gps       116   1     13836  772   ffffffff 4007dec8 S /system/bin/mtk_agpsd
system    117   1     1148   436   c0140624 400f6098 S /system/bin/stp_dump3
root      119   1     17608  1476  ffffffff 4016e700 S /system/bin/atci_service
root      120   1     10588  1696  c0140624 40113098 S /system/bin/atcid
system    121   1     4740   620   ffffffff 4007af74 S /system/bin/dm_agent_binder
bluetooth 122   1     8224   1212  ffffffff 40234098 S /system/bin/mtkbt
system    123   1     3864   740   c00562e8 40118f74 S /system/bin/mdpd
root      126   1     1648   560   c00881a8 4009c700 S /system/bin/hscdtd007a
root      127   1     15312  1792  ffffffff 4004d700 S /system/bin/em_svr
system    128   1     4680   580   ffffffff 40150f74 S /system/bin/nvram_agent_binder
root      131   1     1028   352   c0288208 40086d3c S /system/bin/sh
root      134   2     0      0     c007e778 00000000 S pvr_workqueue
root      328   2     0      0     c007e778 00000000 S mtklfb
radio     347   1     13476  556   ffffffff 400e1700 S /system/bin/gsm0710muxd
shell     348   1     5148   660   ffffffff 40144d3c S /system/bin/mdlogger
radio     371   1     26488  944   ffffffff 4009a700 S /system/bin/rild
system    398   106   445644 58800 ffffffff 400dcf74 S system_server
root      482   2     0      0     c0344c0c 00000000 S ksdioirqd/mmc2
system    489   106   371684 52680 ffffffff 400dde50 S com.android.systemui
root      535   2     0      0     bf2124c8 00000000 S tx_thread
log       536   1     952    348   c0288208 40102d3c S /system/bin/logwrapper
wifi      538   536   3108   1112  c0140624 400f5098 S /system/bin/wpa_supplicant
radio     558   106   332432 33844 ffffffff 400dde50 S com.android.phone
u0_a51    564   106   299024 26940 ffffffff 400dde50 S com.vivo.motionrecognition
u0_a53    576   106   312772 29008 ffffffff 400dde50 S com.mediatek.bluetooth
system    585   1     1152   476   c016f01c 4008ae50 S /system/xbin/mnld
radio     587   106   296552 26788 ffffffff 400dde50 S com.mediatek.mdlogger

那麼如何在代碼中判斷當前的硬件系統有多少的 RAM 呢？

使用下面代碼可以奏效：

在 Framework  ProcessList.java 中有如下代碼可用：

ProcessList() {
   MemInfoReader minfo = new MemInfoReader();
   minfo.readMemInfo();
   mTotalMemMb = minfo.getTotalSize()/(1024*1024);
}

這個可以用於 app 層來適配不同內存配置的機型。