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Date: Fri, 13 Sep 2002 16:46:53 -0700
From: William Lee Irwin III <wli@holomorphy.com>
To: Dave Hansen <haveblue@us.ibm.com>
Cc: Andrew Morton <akpm@digeo.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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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

...

OTOH, with such a small task count, ZONE_NORMAL is the only thing
feeling pressure anyway. There's also very little cpu pressure:
CPU states:   0.2% user,   6.4% system,   0.0% nice,  93.4% idle

Cheers,
Bill