From: Andrew Morton <akpm@linux-foundation.org>
To: Arjan van de Ven <arjan@linux.intel.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <peterz@infradead.org>,
"Kok, Auke-jan H" <auke-jan.h.kok@intel.com>
Subject: Re: [PATCH] sched: Provide iowait counters
Date: Fri, 24 Jul 2009 21:22:20 -0700 [thread overview]
Message-ID: <20090724212220.afa278ee.akpm@linux-foundation.org> (raw)
In-Reply-To: <4A64B813.1080506@linux.intel.com>
On Mon, 20 Jul 2009 11:31:47 -0700 Arjan van de Ven <arjan@linux.intel.com> wrote:
> For counting how long an application has been waiting for (disk) IO,
> there currently is only the HZ sample driven information available, while
> for all other counters in this class, a high resolution version is
> available via CONFIG_SCHEDSTATS.
>
> In order to make an improved bootchart tool possible, we also need
> a higher resolution version of the iowait time.
>
> This patch below adds this scheduler statistic to the kernel.
Doesn't this duplicate the delay accounting already available via the
taskstats interface?
next prev parent reply other threads:[~2009-07-25 4:22 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-20 18:31 [PATCH] sched: Provide iowait counters Arjan van de Ven
2009-07-20 19:16 ` Peter Zijlstra
2009-07-20 19:31 ` Arjan van de Ven
2009-07-20 19:42 ` Steven Rostedt
2009-07-20 20:11 ` Peter Zijlstra
2009-07-20 20:26 ` Steven Rostedt
2009-07-20 20:38 ` Peter Zijlstra
2009-07-20 21:03 ` Steven Rostedt
2009-07-25 4:22 ` Andrew Morton [this message]
2009-07-25 4:33 ` Arjan van de Ven
2009-07-25 4:40 ` Andrew Morton
2009-07-25 4:48 ` Arjan van de Ven
2009-07-25 5:04 ` Andrew Morton
2009-07-25 6:05 ` Peter Zijlstra
2009-07-25 7:21 ` Andrew Morton
2009-07-25 16:42 ` Arjan van de Ven
2009-07-25 17:41 ` Peter Zijlstra
2009-07-25 17:56 ` Arjan van de Ven
2009-07-25 18:25 ` Arjan van de Ven
2009-08-03 13:21 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2009-09-02 7:00 ` tip-bot for Arjan van de Ven
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