- android性能测试工具之dumpsys
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补记: MAT(memory analyzer tool )是google 推荐的进行内存使用量分析的工具.功能全面而强大!!!
首先看一下dumpsys有哪些功能:
dumpsys 用来给出手机中所有应用程序的信息,并且也会给出现在手机的状态。 dumpsys [Option] meminfo 显示内存信息 cpuinfo 显示CPU信息 account 显示accounts信息 activity 显示所有的activities的信息 window 显示键盘,窗口和它们的关系 wifi 显示wifi信息 从我的G14中可以看到它从以下service获得所有的信息 Currently running services: SurfaceFlinger accessibility account activity alarm appwidget assetredirection audio backup battery batteryinfo bluetooth bluetooth_a2dp bluetooth_hid bluetooth_network clipboard connectivity content cpuinfo device_policy devicestoragemonitor diskstats dropbox entropy hardware input_method iphonesubinfo isms location media.audio_flinger media.audio_policy media.camera media.player meminfo mount netstat network_management notification package 接下来,来看看Android系统是如何实现dumpsys的。
dumpsys的代码在mydroid/frameworks/base/cmds/dumpsys/dumpsys.cpp 所有的dump信息都是由重载了Binder中的dump函数的类来完成: @Override protected void dump(FileDescriptor fd, PrintWriter pw, String[]args) { ... } 代码很简单,发现搜有dump的信息都是由defaultServiceManager(关于Android的ServiceManager的结构分析参见我之后的一篇文章)提供的由系统注册的所有service来提供信息。 以meminfo为例: 它是在mydroid/frameworks/base/services/java/com/android/server/am/ActivityManagerService.java中的setSystemProcess函数处被注册的 SrviceManager.addService("activity", m); ServiceManager.addService("meminfo", new MemBinder(m)); ... MemBinder->ProcessRecord->各个正在运行状态的ApplicationThread的状态(mydroid/frameworks/base/core/java/android/app/ActivityThread.java),从中得到需要的meminfo信息。 这其中其实牵涉到负责的Android的是如何管理Linux的进程,同时又是如何把Linux的进程管理起来提供各种信息给层使用。 总之,关键还是package的管理和它的活动周期的管理问题。值得深入理解。
摘自 Melody_lu123
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这是一个很好用的工具,在adbshell下可以使用,主要用来获取一些系统service的信息,也可以对这些服务做一些简单的控制。 首先是获得哪些service信息可以dump
- $ adb shell dumpsys | grepDUMP
- DUMP OF SERVICE AtCmdFwd: DUMP OF SERVICE SurfaceFlinger: DUMP OF SERVICE accessibility: DUMP OF SERVICE account: DUMP OF SERVICE activity: DUMP OF SERVICE alarm: DUMP OF SERVICE appwidget: DUMP OF SERVICE audio: DUMP OF SERVICE backup: DUMP OF SERVICE battery: DUMP OF SERVICE batteryinfo: DUMP OF SERVICE bluetooth: DUMP OF SERVICE bluetooth_a2dp: DUMP OF SERVICE clipboard: ....
然后就是具体获取某个服务的信息,比如电池使用信息:
- $ adb shell dumpsysbatteryinfo
比如抓某个package的进程的memory使用情况:
- $ adb shell dumpsys meminfoYourPkg
再比如测试wifi功能,写个script脚本:
- $ adb shell svc wifienable # disable对应禁用wifi
- $ adb shell sleep 4
- $ adb shell dumpsys wifi >wifiEnable.txt
如果dumpsys不能用,检查你的manifest.xml是不是加了这个permission:
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ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)
Main stack: TaskRecord{438f1ed8 #9 A com.leaves.ipanel U 0} Intent {act=android.intent.action.MAINcat=[android.intent.category.LAUNCHER] flg=0x10000000cmp=com.leaves.ipanel/.MainActivity } Hist #2: ActivityRecord{4265b1b0 u0com.leaves.ipanel/.ActivityA} Intent { act=com.leaves.ipanel.ActivityA flg=0x20000000cmp=com.leaves.ipanel/.ActivityA } ProcessRecord{4292a550 2115:com.leaves.ipanel/u0a10061} Hist #1: ActivityRecord{42485758 u0com.leaves.ipanel/.MainActivity} Intent { act=android.intent.action.MAINcat=[android.intent.category.LAUNCHER] flg=0x10000000cmp=com.leaves.ipanel/.MainActivity } ProcessRecord{4292a550 2115:com.leaves.ipanel/u0a10061} TaskRecord{426f4820 #2 A com.android.launcher U 0} Intent {act=android.intent.action.MAIN cat=[android.intent.category.HOME]flg=0x10600000cmp=com.android.launcher/com.android.launcher2.Launcher } Hist #0: ActivityRecord{4291c7b0 u0com.android.launcher/com.android.launcher2.Launcher} Intent { act=android.intent.action.MAINcat=[android.intent.category.HOME] flg=0x10000000cmp=com.android.launcher/com.android.launcher2.Launcher } ProcessRecord{4267f0b8 636:com.android.launcher/1000}