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Message-Id: <20090701.231758.128627745.mitake@dcl.info.waseda.ac.jp> Date: Wed, 01 Jul 2009 23:17:58 +0900 (JST) From: mitake@....info.waseda.ac.jp To: mingo@...e.hu Cc: fweisbec@...il.com, a.p.zijlstra@...llo.nl, paulus@...ba.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH][RFC] Adding information of counts processes acquired how many spinlocks to schedstat From: Ingo Molnar <mingo@...e.hu> Subject: Re: [PATCH][RFC] Adding information of counts processes acquired how many spinlocks to schedstat Date: Wed, 1 Jul 2009 15:50:32 +0200 > > > Which makes me think it may be better to use the existing ftrace > > lock events as softwares counters for that, which takes into > > account the following events: > > > > - lock_acquire > > - lock_release > > - lock_contended > > - lock_acquired > > > > And these events are per lock. > > > > Now the missing piece is the sampling count for events... > > Yeah, this is an even better idea. It gets the acquire counts - and > much more. > Is there another way to implement more easily? Fortunately or unfortunately, I didn't start implementing because my x86_64 box died suddenly :-( So I'll need a few days to fix, sorry... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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