This is systrace script for Linux Desktop/Server
1 Description
1.1 Usage
python systrace -h
Usage: systrace [options]
Options:
| options | description |
|---|---|
| -h, --help | show this help message and exit |
| -o FILE | write HTML to FILE |
| -t N, --time=N | trace for N seconds |
| -b N, --buf-size=N | use a trace buffer size of N KB |
| -d, --disk | trace disk I/O (requires root) |
| -f, --cpu-freq | trace CPU frequency changes |
| -i, --cpu-idle | trace CPU idle events |
| -l, --cpu-load | trace CPU load |
| -s, --no-cpu-sched | inhibit tracing CPU scheduler (allows longer trace times by reducing data rate into buffer) |
| -w, --workqueue | trace the kernel workqueues (requires root) |
| -g, --gpu | trace GPU events |
| -e TRACE_EVENT, --trace-event=TRACE_EVENT | trace Custom events |
1.2 DONE
add ext4/block request parser from old systrace
1.3 TODO
add userspace support library integrate with policykit ftrace_tracing_mark
2 USE
2.1 systrace
python systrace -t 1 -v -e "sched,irq"
open your chrome tracing page chrome://tracing
Drag trace.html into the chrome window
2.2 fix_time
2.2.1 fix_time.pl
We can see that the time shown in the Trace-Viewer(systrace) is relative-time,
However, the time displayed in the ftrace dumping is the system time(absolute time).
Use the script fix_time.pl to adjust absolute-time to relative-time.
perl scripts/fix_time.pl ./trace.html trace.html.jsThe relative time is shown in the output file trace.html.js
2.2.2 SystraceAnalysis.py
[Python解析systrace.html]chrome打开systrace分析，图形显示时间点与文本时间点一一对应，方便debug使用
GitHub: samarxie/systrace/SystraceAnalysis.py
python SystraceAnalysis.py -i systrace.html -o trace.txt -d delta_value3 Reference
Parser for Linux Ftrace (Android Systrace) logs for system power & performance analysis.