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

add ext4/block request parser from old systrace

add userspace support library integrate with policykit ftrace_tracing_mark

python systrace -t 1 -v -e "sched,irq"

open your chrome tracing page chrome://tracing

Drag trace.html into the chrome window

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.js

The relative time is shown in the output file trace.html.js

python SystraceAnalysis.py -i systrace.html -o trace.txt -d delta_value