Android Trace使用

目录

1. 使用命令

2. 使用DDMS

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 1. 使用命令比较准确方便，在android源码工程目录下，

external/chromium-trace# python systrace.py -help
Usage: systrace.py [options] [category1 [category2 ...]]

**Example: systrace.py -b 32768 -t 15 gfx input view sched freq**

Options:
  -h, --help            show this help message and exit
  -o FILE               write trace output to FILE
  -j, --json            write a JSON file
  --link-assets         (deprecated)
  --asset-dir=ASSET_DIR
                        (deprecated)
  -e DEVICE_SERIAL_NUMBER, --serial=DEVICE_SERIAL_NUMBER
                        adb device serial number
  --target=TARGET       choose tracing target (android or linux)
  --timeout=TIMEOUT     timeout for start and stop tracing (seconds)
  --collection-timeout=COLLECTION_TIMEOUT
                        timeout for data collection (seconds)
  -t N, --time=N        trace for N seconds
  -b N, --buf-size=N    use a trace buffer size  of N KB
  -l, --list-categories
                        list the available categories and exit

  Atrace options:
    --atrace-categories=ATRACE_CATEGORIES
                        Select atrace categories with a comma-delimited list,
                        e.g. --atrace-categories=cat1,cat2,cat3
    -k KFUNCS, --ktrace=KFUNCS
                        specify a comma-separated list of kernel functions to
                        trace
    --no-compress       Tell the device not to send the trace data in
                        compressed form.
    -a APP_NAME, --app=APP_NAME
                        enable application-level tracing for comma-separated
                        list of app cmdlines
    --from-file=FROM_FILE
                        read the trace from a file (compressed) rather than
                        running a live trace

  Atrace process dump options:
    --process-dump      Capture periodic per-process memory dumps.
    --process-dump-interval=PROCESS_DUMP_INTERVAL_MS
                        Interval between memory dumps in milliseconds.
    --process-dump-full=PROCESS_DUMP_FULL_CONFIG
                        Capture full memory dumps for some processes. Value:
                        all, apps or comma-separated process names.
    --process-dump-mmaps
                        Capture VM regions and memory-mapped files. It
                        increases dump size dramatically, hence only has
                        effect if --process-dump-full is a whitelist.

  Ftrace options:
    --ftrace-categories=FTRACE_CATEGORIES
                        Select ftrace categories with a comma-delimited list,
                        e.g. --ftrace-categories=cat1,cat2,cat3

  WALT trace options:
    --walt              Use the WALT tracing agent. WALT is a device for
                        measuring latency of physical sensors on phones and
                        computers. See https://github.com/google/walt

external/chromium-trace# python systrace.py -l
         gfx - Graphics
       input - Input
        view - View System
     webview - WebView
          wm - Window Manager
          am - Activity Manager
          sm - Sync Manager
       audio - Audio
       video - Video
      camera - Camera
         hal - Hardware Modules
         res - Resource Loading
      dalvik - Dalvik VM
          rs - RenderScript
      bionic - Bionic C Library
       power - Power Management
          pm - Package Manager
          ss - System Server
    database - Database
     network - Network
         adb - ADB
    vibrator - Vibrator
        aidl - AIDL calls
       nnapi - NNAPI
         rro - Runtime Resource Overlay
         pdx - PDX services
       sched - CPU Scheduling
         irq - IRQ Events
      irqoff - IRQ-disabled code section tracing
  preemptoff - Preempt-disabled code section tracing
         i2c - I2C Events
        freq - CPU Frequency
        idle - CPU Idle
        disk - Disk I/O
         mmc - eMMC commands
        sync - Synchronization
       workq - Kernel Workqueues
  memreclaim - Kernel Memory Reclaim
  regulators - Voltage and Current Regulators
  binder_driver - Binder Kernel driver
  binder_lock - Binder global lock trace
   pagecache - Page cache
      memory - Memory
         gfx - Graphics (HAL)
         ion - ION allocation (HAL)

external/chromium-trace# python systrace.py camera -t 5 -b 4096 -a com.xxx.xxx -o xxxtest_trace.html
Starting tracing (5 seconds)
Tracing completed. Collecting output...
Outputting Systrace results...
Tracing complete, writing results

Wrote trace HTML file: file:///home/xxx/external/chromium-trace/xxxtest_trace.html

2.使用DDMS

Android studio -> terminal 内执行 android sdk/tools/monitor.bat 调出DDMS(Dalvik Debug Monitor Server):

"could not open Selected VM debug port(8700) issue" ---- 关闭Android studio 即可解决。

 

3.添加Trace

In Android java,

import android.os.Trace;
Trace.beginSection("Trace section TAG");
... code ...
Trace.endSection();

In C++,

#include <Android/Trace.h>
Atrace_beginSection("Trace section TAG");
... code ...
Atrace_endSection();

 

4.查看Trace 文件