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SubjectRe: [PATCH] trace: reset sleep/block start time on task switch
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On Wed, 2012-01-25 at 11:50 -0800, Arun Sharma wrote:

> # perf record -agP -e sched:sched_switch --filter "prev_state == 1 ||
> prev_state == 2" -e sched:sched_stat_sleep -- sleep 3
> [ perf record: Woken up 107 times to write data ]
> [ perf record: Captured and wrote 32.629 MB perf.data (~1425585 samples) ]
> Warning:
> Processed 104066 events and lost 4 chunks!
>
> Check IO/CPU overload!

Just for kicks, could you try trace-cmd?

git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git

trace-cmd record -e sched_switch -f 'prev_state == 1 || prev_state == 2' -e sched_stat_sleep sleep 3
I'm not sure the filter is even needed, and it should still keep up
fine.

-- Steve




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