From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Seth, Rohit" Date: Sat, 15 Mar 2003 03:08:48 +0000 Subject: RE: [Linux-ia64] page size > 16KB Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org The HugeTLB page documentation with 2.5.64 is most uptodate. The default setting on SLES8 uses 16MB hugepage size. > -----Original Message----- > From: Jesse Barnes [mailto:jbarnes@sgi.com] > Sent: Friday, March 14, 2003 9:34 AM > To: Jan Schreckenbach > Cc: linux-ia64@linuxia64.org > Subject: Re: [Linux-ia64] page size > 16KB > > > 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. > > Are you using the huge TLB support (it's not transparent to > the app). If you're seeing a few percent going from 16k to > 64k, I'd expect that you'd see a bigger gain going from 16k > to using the huge tlb api. See > Documentation/vm/hugetlbpage.txt in the kernel source for an > idea of how to make use it (not sure if the doc is up to > date, haven't used it myself). > > Jesse > > _______________________________________________ > Linux-IA64 mailing list > Linux-IA64@linuxia64.org > http://lists.linuxia64.org/lists/listinfo/linu> x-ia64 >