From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Andrew Morton <akpm@osdl.org>
Cc: steiner@sgi.com, mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] - Reduce overhead of calc_load
Date: Sat, 18 Mar 2006 17:10:46 +1100 [thread overview]
Message-ID: <441BA466.6000903@yahoo.com.au> (raw)
In-Reply-To: <441B9CE2.2050204@yahoo.com.au>
Nick Piggin wrote:
> Andrew Morton wrote:
>> Take a look at (for example) nr_iowait. We forget to spill the count out
>> of the departing CPU's runqueue and hence we have to sum it across all
>
>
> I don't think a departing runqueue should have any iowaiters on it,
> should it?
>
No I'm wrong there. Instead of doing all these migrations and having the
ugly nr_iowait and nr_uninterruptible things I would much prefer just to
migrate the stat when the actual task is migrated. This should take care
of cpu hotplug, and also can make everything consistent.
I'll try doing a patch for that sometime.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
prev parent reply other threads:[~2006-03-18 6:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-17 14:57 [PATCH] - Reduce overhead of calc_load Jack Steiner
2006-03-17 14:59 ` Ingo Molnar
2006-03-17 15:26 ` Jack Steiner
2006-03-18 1:15 ` Andrew Morton
2006-03-18 2:09 ` Nick Piggin
2006-03-18 2:37 ` Andrew Morton
2006-03-18 2:46 ` Nick Piggin
2006-03-18 5:13 ` Andrew Morton
2006-03-18 5:38 ` Nick Piggin
2006-03-18 6:10 ` Nick Piggin [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=441BA466.6000903@yahoo.com.au \
--to=nickpiggin@yahoo.com.au \
--cc=akpm@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=steiner@sgi.com \
/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.