]>
Commit | Line | Data |
---|---|---|
56c49951 TT |
1 | The power tracer collects detailed information about C-state and P-state |
2 | transitions, instead of just looking at the high-level "average" | |
3 | information. | |
4 | ||
5 | There is a helper script found in scrips/tracing/power.pl in the kernel | |
6 | sources which can be used to parse this information and create a | |
7 | Scalable Vector Graphics (SVG) picture from the trace data. | |
8 | ||
9 | To use this tracer: | |
10 | ||
11 | echo 0 > /sys/kernel/debug/tracing/tracing_enabled | |
12 | echo power > /sys/kernel/debug/tracing/current_tracer | |
13 | echo 1 > /sys/kernel/debug/tracing/tracing_enabled | |
14 | sleep 1 | |
15 | echo 0 > /sys/kernel/debug/tracing/tracing_enabled | |
16 | cat /sys/kernel/debug/tracing/trace | \ | |
17 | perl scripts/tracing/power.pl > out.sv |