From: Ingo Molnar <mingo@elte.hu>
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch] sched: Keep total / count stats in addition to the max for wait time
Date: Tue, 22 Jan 2008 22:06:59 +0100 [thread overview]
Message-ID: <20080122210659.GA26764@elte.hu> (raw)
In-Reply-To: <20080121110809.1b584998@laptopd505.fenrus.org>
* Arjan van de Ven <arjan@infradead.org> wrote:
> From: Arjan van de Ven <arjan@linux.intel.com>
> Subject: sched: Keep total / count stats in addition to the max for wait time
>
> Right now, the linux kernel (with scheduler statistics enabled) keeps
> track of the maximum time a process is waiting to be scheduled. While
> the maximum is a very useful metric, tracking average and total is
> equally useful (at least for latencytop) to figure out the accumulated
> effect of scheduler delays. The accumulated effect is important to
> judge the performance impact of scheduler tuning/behavior.
thanks, applied to sched-devel.git.
Ingo
prev parent reply other threads:[~2008-01-22 21:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-21 19:08 [patch] sched: Keep total / count stats in addition to the max for wait time Arjan van de Ven
2008-01-22 21:06 ` Ingo Molnar [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080122210659.GA26764@elte.hu \
--to=mingo@elte.hu \
--cc=arjan@infradead.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.