Re: Problem: scaling of /proc/stat on large systems

[KAMEZAWA Hiroyuki]

On Mon, 11 Oct 2010 17:22:26 -0700
Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:

> On Tue, 12 Oct 2010 09:09:07 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:
> 
> > > > 
> > > > How about this ? This is an add-on patch.
> > > 
> > > Nice!!
> > > 
> > > The combination of the 2 patches solves the problem.
> > > The timings are (4096p, 256 nodes, 4592 irqs):
> > > 
> > > 	# time cat /proc/stat > /dev/null
> > > 
> > > 	Baseline:		12.627 sec
> > > 	Patch1  :		 2.459 sec
> > > 	Patch 1 + Patch 2:	  .561 sec
> > > 
> > > 
> > > Acked-by: Jack Steiner <steiner@xxxxxxx>
> > > 
> > 
> > Thank you for testing. I'll post again if necessary.
> 
> Yes please.  This has been going on for two weeks so memories need
> refreshing.  Also we have no patch title and no changelog which
> includes the testing results.
> 
> I could stitch all that together of course, but it's best that it all
> be done afresh, I think.
> 
ok, will do today.

-Kame

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