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From: Jesse Barnes <jbarnes@engr.sgi.com>
To: "Martin J. Bligh" <mbligh@aracnet.com>
Subject: Re: Performance of -mm2 and -mm4
Date: Mon, 23 Aug 2004 14:31:25 -0700
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On Monday, August 23, 2004 9:58 am, Martin J. Bligh wrote:
> The -mm4 looks more like sched stuff to me (copy_to/from_user, etc),
> but the -mm2 stuff looks like something else. Buggered if I know what.
> -mm3 didn't compile cleanly, so I didn't bother, but I prob can if you
> like.

If you suspect the scheduler, you could try bumping SD_NODES_PER_DOMAIN in 
kernel/sched.c to a larger value (e.g. the number of nodes in your system).  
That'll make the scheduler balance more aggressively across the whole system.

Jesse