conn rcv_lock converted to spinlock, struct cor_sock created, kernel_packet skb_clone...
[cor_2_6_31.git] / Documentation / trace / power.txt
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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.
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.
9 To use this tracer:
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