adb shell top
top命令提供了实时的对系统处理器的状态监视.它将显示系统中CPU最“敏感”的任务列表.该命令可以按CPU使用.内存使用和执行时间对任务进行排序.
top 用法
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>adb shell top -h
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Usage: top [ -m max_procs ] [ -n iterations ] [ -d delay ] [ -s sort_column ] [-t ] [ -h ]
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-m num Maximum number of processes to display. 最多显示多少个进程
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-n num Updates to show before exiting. 刷新次数
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-d num Seconds to wait between updates. 刷新间隔时间(默认5秒)
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-s col Column to sort by (cpu,vss,rss,thr). 按哪列排序
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-t Show threads instead of processes. 显示线程信息而不是进程
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-h Display this help screen. 显示帮助文档
adb shell top
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> adb shell top
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User 13%, System 5%, IOW 0%, IRQ 0%
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User 85 + Nice 0 + Sys 37 + Idle 509 + IOW 0 + IRQ 0 + SIRQ 0 = 631
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PID PR CPU% S #THR VSS RSS PCY UID Name
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22205 0 13% S 56 423416K 88160K fg u0_a92 com.tmall.wireless
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24310 1 2% R 1 1232K 536K root top
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22600 0 1% S 46 341712K 40872K fg u0_a90 com.wandoujia.phoenix2.usbproxy
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31125 1 1% S 31 319976K 33284K fg u0_a74 com.android.Chinpower
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1533 0 1% S 32 67320K 20552K fg system /system/bin/surfaceflinger
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1852 0 1% S 112 445876K 80304K fg system system_server
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...
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10 0 0% S 1 0K 0K root watchdog/0
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16 1 0% S 1 0K 0K root khelper
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22 1 0% S 1 0K 0K root suspend_sys_syn
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23 1 0% S 1 0K 0K root suspend
第一组数据的含义:
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User 处于用户态的运行时间,不包含优先值为负进程
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Nice 优先值为负的进程所占用的CPU时间
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Sys 处于核心态的运行时间
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Idle 除IO等待时间以外的其它等待时间
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IOW IO等待时间
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IRQ 硬中断时间
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SIRQ 软中断时间
第二组数据的含义:
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PID 进程id
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PR 优先级
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CPU% 当前瞬时CPU占用率
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S 进程状态:D=不可中断的睡眠状态, R=运行, S=睡眠, T=跟踪/停止, Z=僵尸进程
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#THR 程序当前所用的线程数
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VSS Virtual Set Size 虚拟耗用内存(包含共享库占用的内存)
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RSS Resident Set Size 实际使用物理内存(包含共享库占用的内存)
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PCY 调度策略优先级,SP_BACKGROUND/SP_FOREGROUND
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UID 进程所有者的用户id
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Name 进程的名称
具体信息可以查看源代码中: xx\system\core\toolbox\top.c
监控CPU的命令使用实战
>adb shell top | findstr tmall > d:\cpu.txt
打印 top命令,并查找 包含 tmall的命令行,输出至 d:\cpu.txt
result:
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22137 1 0% S 10 304728K 28900K bg u0_a92 com.tmall.wireless:push
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22205 0 0% S 15 322944K 38236K bg u0_a92 com.tmall.wireless
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22205 1 27% R 34 345304K 49396K fg u0_a92 com.tmall.wireless
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22112 1 0% S 9 303704K 29380K bg u0_a92 com.tmall.wireless:containerprocess1
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22137 1 0% S 10 304728K 28900K bg u0_a92 com.tmall.wireless:push
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22252 1 0% S 9 302600K 28596K fg u0_a92 com.tmall.wireless:notify
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22205 0 45% R 40 365500K 56708K fg u0_a92 com.tmall.wireless
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22252 0 22% S 19 325476K 40868K bg u0_a92 com.tmall.wireless:notify
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22137 0 2% S 14 308944K 31320K fg u0_a92 com.tmall.wireless:push
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22112 0 0% S 9 305892K 29888K bg u0_a92 com.tmall.wireless:containerprocess1
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22137 1 14% S 17 323080K 39696K bg u0_a92 com.tmall.wireless:push
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22252 0 3% S 21 327656K 41556K bg u0_a92 com.tmall.wireless:notify
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22205 1 2% S 38 366420K 59700K fg u0_a92 com.tmall.wireless
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22112 0 0% S 9 305892K 29888K bg u0_a92 com.tmall.wireless:containerprocess1
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22408 0 0% R 9 278424K 21936K fg u0_a92 com.tmall.wireless:utremote
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22408 1 7% S 9 304180K 30964K bg u0_a92 com.tmall.wireless:utremote
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22205 0 2% R 39 367456K 59612K fg u0_a92 com.tmall.wireless