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1The power tracer collects detailed information about C-state and P-state
2transitions, instead of just looking at the high-level "average"
3information.
4
5There is a helper script found in scrips/tracing/power.pl in the kernel
6sources which can be used to parse this information and create a
7Scalable Vector Graphics (SVG) picture from the trace data.
8
9To 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