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Date: Fri, 13 Sep 2002 17:02:56 -0700
From: Andrew Morton <akpm@digeo.com>
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To: William Lee Irwin III <wli@holomorphy.com>
CC: Dave Hansen <haveblue@us.ibm.com>, colpatch@us.ibm.com,
       "Martin J. Bligh" <mbligh@aracnet.com>,
       Michael Hohnbaum <hohnbaum@us.ibm.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] per-zone^Wnode kswapd process
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William Lee Irwin III wrote:
> 
> On Fri, Sep 13, 2002 at 03:52:21PM -0700, Dave Hansen wrote:
> > Here's a per-node kswapd.  It's actually per-pg_data_t, but I guess that
> > they're equivalent.  Matt is going to follow up his topology API with
> > something to bind these to their respective nodes.
> 
> >From 64 parallel tiobench 64's (higher counts livelock in fork() etc.):
> 
>    38 root      15   0     0    0     0 RW   23.0  0.0   1:11 kswapd0
>  4779 wli       22   0  4460 3588  1648 R    17.9  0.0   0:16 top
> 
> ...
> 
>  4779 wli       25   0  4460 3592  1648 R    14.1  0.0   0:27 top
>    38 root      15   0     0    0     0 DW    3.5  0.0   1:31 kswapd0
> 

Why do I see only one kswapd here?

Are you claiming an overall 4x improvement, or what?

I'll add some instrumentation whch tells us how many pages
kswapd is reclaiming versus direct reclaim.