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]
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