From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: Re: [parisc-linux] ext2 vs ext3 on hppa Date: Fri, 11 Feb 2005 14:42:44 +0000 Message-ID: <20050211144244.GD17242@parcelfarce.linux.theplanet.co.uk> References: <20050211071629.GA32318@colo.lackof.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: parisc-linux@lists.parisc-linux.org To: Grant Grundler In-Reply-To: <20050211071629.GA32318@colo.lackof.org> List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: parisc-linux-bounces@lists.parisc-linux.org On Fri, Feb 11, 2005 at 12:16:29AM -0700, Grant Grundler wrote: > Hi all, > ext3 perf isn't so good on parisc. > I've posted profile data for kernel builds: > > http://lists.parisc-linux.org/pipermail/parisc-linux/2004-November/025196.html > > But not for "tar". I can't find the data I collect before. :^( > ISTR the culprit in ext3 was the bitmap search using atomic ops. > On parisc, atomic ops are terrible since it requires a spinlock/op/unlock > sequence. I switched the ext2/3 bitops to use the non-atomic ops. Tried it on nicol (dual 550MHz PA8600) ... $ time tar xjf ~/linux-2.6.11-rc3.tar.bz2 real 25m4.557s user 1m7.262s sys 24m59.092s ouch. time to do some profiling, i guess, instead of assuming I saw the problem and the fix ... -- "Next the statesmen will invent cheap lies, putting the blame upon the nation that is attacked, and every man will be glad of those conscience-soothing falsities, and will diligently study them, and refuse to examine any refutations of them; and thus he will by and by convince himself that the war is just, and will thank God for the better sleep he enjoys after this process of grotesque self-deception." -- Mark Twain _______________________________________________ parisc-linux mailing list parisc-linux@lists.parisc-linux.org http://lists.parisc-linux.org/mailman/listinfo/parisc-linux