目录
?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 sdlguitest_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
