From: cliff white <cliffw@osdl.org>
To: Nick Piggin <piggin@cyberone.com.au>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Nick's scheduler v17
Date: Fri, 24 Oct 2003 13:17:31 -0700 [thread overview]
Message-ID: <20031024131731.29ae599a.cliffw@osdl.org> (raw)
In-Reply-To: <3F996B10.4080307@cyberone.com.au>
On Sat, 25 Oct 2003 04:10:24 +1000
Nick Piggin <piggin@cyberone.com.au> wrote:
> Hi,
> http://www.kerneltrap.org/~npiggin/v17/
>
> Still working on SMP and NUMA. Some (maybe) interesting things I put in are
> - Sequential CPU balancing so you don't get a big storm of balances
> every 1/4s.
> - Balancing is trying to err more on the side of caution, I have to start
> analysing it more thoroughly though.
> - Attacked the NUMA balancing code. There should now be less buslocked ops /
> cache pingpongs in some fastpaths. Volanomark likes it, more realistic
> loads
> won't improve so much http://www.kerneltrap.org/~npiggin/v17/volano.png
> This improvement is NUMA only.
>
> I haven't had time to reproduce Cliff's serious reaim performance
> dropoffs so
> they're probably still there. I couldn't reproduce Martin's kernbench
> dropoff,
> but the 16-way I'm using only has 512K cache which might not show it up.
>
Okay, i put both v17 patches in the OSDL Patch Lifecycle Manager
( http://www.osdl.org/plm-cgi/plm/ )
sched-v17 is PLM #2251
sched-nopolicy-v17 is PLM #2252
Results asap.
cliffw
>
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--
The church is near, but the road is icy.
The bar is far, but i will walk carefully. - Russian proverb
next prev parent reply other threads:[~2003-10-24 20:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-24 18:10 Nick's scheduler v17 Nick Piggin
2003-10-24 20:17 ` cliff white [this message]
2003-10-24 21:49 ` Andrew Theurer
2003-10-25 1:12 ` Nick Piggin
2003-10-26 6:43 ` Nick Piggin
2003-10-27 17:02 ` Andrew Theurer
2003-10-27 23:13 ` Nick Piggin
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