From: Andi Kleen <andi@firstfloor.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [Announce] Development release 0.1 of the LatencyTOP tool II
Date: Sat, 19 Jan 2008 06:37:58 +0100 [thread overview]
Message-ID: <20080119053758.GC28467@one.firstfloor.org> (raw)
In-Reply-To: <20080119053330.GB28467@one.firstfloor.org>
On Sat, Jan 19, 2008 at 06:33:30AM +0100, Andi Kleen wrote:
> > another thing that the current profiling can't do, is to show what the
> > system is doing
> > when it hits the latency.. so someone calling fsync() will show up in the
> > waiting for
> > IO function, but not that it was due to an fsync().
>
> Hmm so how about extending oprofile to always log the syscall number
> in the event logs (can be gotten from top of stack). I think given
Ok to handle exceptions like page faults this way you would need to save
the vector somewhere on entry, but that shouldn't be very costly
or difficult and could probably even be done unconditionally.
-Andi
next prev parent reply other threads:[~2008-01-19 5:34 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-18 17:36 [Announce] Development release 0.1 of the LatencyTOP tool Arjan van de Ven
2008-01-18 17:39 ` [patch 1/3] LatencyTOP infrastructure patch Arjan van de Ven
2008-01-20 11:34 ` Helge Deller
2008-01-20 16:47 ` Dmitry Adamushko
2008-01-20 17:18 ` Dmitry Adamushko
2008-01-21 8:06 ` KOSAKI Motohiro
2008-01-21 16:16 ` Arjan van de Ven
2008-01-18 17:40 ` [patch 2/3] Latencytop instrumentations part 1 Arjan van de Ven
2008-01-18 22:26 ` Frank Ch. Eigler
2008-01-18 22:33 ` Arjan van de Ven
2008-01-18 22:47 ` Arnaldo Carvalho de Melo
2008-01-18 23:11 ` Frank Ch. Eigler
2008-01-18 23:20 ` Arjan van de Ven
2008-01-18 17:42 ` [patch 3/3] LatencyTOP instrumentations part 2 Arjan van de Ven
2008-01-18 18:27 ` [Announce] Development release 0.1 of the LatencyTOP tool Roberto Fichera
2008-01-18 18:35 ` Arjan van de Ven
2008-01-18 18:46 ` Roberto Fichera
2008-01-18 19:02 ` Zan Lynx
2008-01-19 5:07 ` Andi Kleen
2008-01-19 5:16 ` Arjan van de Ven
2008-01-19 5:27 ` Andi Kleen
2008-01-19 5:25 ` Arjan van de Ven
2008-01-19 5:33 ` Andi Kleen
2008-01-19 5:34 ` Arjan van de Ven
2008-01-19 6:08 ` Andi Kleen
2008-01-19 5:37 ` Andi Kleen [this message]
2008-01-21 0:52 ` KOSAKI Motohiro
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