Re: [PATCH 00/12] perf lock: New subcommand "perf lock", foranalyzing lock statistics

From: Jens Axboe
Date: Fri Jan 29 2010 - 09:34:14 EST

On Fri, Jan 22 2010, Hitoshi Mitake wrote:
> Adding new subcommand "perf lock" to perf.
> I made this patch series on
> latest perf/core of tip (ef12a141306c90336a3a10d40213ecd98624d274),
> so please apply this series to perf/core.


I wanted to give this a go today, since I think it's pretty nifty and a
lot better than using /proc/lock_stat. But it basically spirals the
system into death [1]. How big a system did you test this on?

[1] Got this: [ 117.097918] hrtimer: interrupt took 35093901 ns

Jens Axboe

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