From: Jesse Barnes <jbarnes@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] page size > 16KB
Date: Fri, 14 Mar 2003 19:00:36 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590709806107@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590709806057@msgid-missing>
On Fri, Mar 14, 2003 at 09:33:30AM -0800, Jesse Barnes wrote:
> On Fri, Mar 14, 2003 at 01:33:12PM +0100, Jan Schreckenbach wrote:
> > yep, I'm doing some benchmark stuff with SAP/SAPDB and the performance
> > is not as good as I expected. CONFIG_HUGETLB_PAGE=y is standard on a
> > SLES8 kernel (2.4.19-SMP). I changed the page size from 16K to 64K
> > and the performance increase was 2-3 percent. Changing Huge TLB Page
> > Size" seems not to have any effect.
richa pointed out that it would probably be a good idea to use perfmon
to count L2DTLB_MISSES events for your app to see whether TLB misses
are really causing a problem. Another good thing to do might be to
run vmstat during your app run to see how much I/O wait time you're
seeing, and whether you're saturating your block device, etc.
Jesse
next prev parent reply other threads:[~2003-03-14 19:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-12 16:38 [Linux-ia64] page size > 16KB Jan Schreckenbach
2003-03-12 16:55 ` Grant Grundler
2003-03-12 17:07 ` n0ano
2003-03-12 17:40 ` David Mosberger
2003-03-12 17:46 ` David Mosberger
2003-03-12 17:49 ` Jesse Barnes
2003-03-12 18:07 ` David Mosberger
2003-03-12 18:08 ` Grant Grundler
2003-03-12 18:24 ` Jesse Barnes
2003-03-12 19:51 ` Mario Smarduch
2003-03-13 18:05 ` David Mosberger
2003-03-13 20:44 ` Mario Smarduch
2003-03-14 12:33 ` Jan Schreckenbach
2003-03-14 15:51 ` Chen, Kenneth W
2003-03-14 17:33 ` Jesse Barnes
2003-03-14 18:00 ` Mario Smarduch
2003-03-14 18:17 ` Grant Grundler
2003-03-14 19:00 ` Jesse Barnes [this message]
2003-03-14 19:43 ` David Mosberger
2003-03-15 3:08 ` Seth, Rohit
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