Received: with ECARTIS (v1.0.0; list xfs); Wed, 26 Sep 2007 02:52:46 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.3.0-r574664 (2007-09-11) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-0.2 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS autolearn=ham version=3.3.0-r574664 Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by oss.sgi.com (8.12.11.20060308/8.12.10/SuSE Linux 0.7) with ESMTP id l8Q9qeZr014242 for ; Wed, 26 Sep 2007 02:52:42 -0700 Received: by lucidpixels.com (Postfix, from userid 1001) id 12F1B1C000260; Wed, 26 Sep 2007 05:52:40 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by lucidpixels.com (Postfix) with ESMTP id 0E5B64019B78; Wed, 26 Sep 2007 05:52:40 -0400 (EDT) Date: Wed, 26 Sep 2007 05:52:39 -0400 (EDT) From: Justin Piszcz X-X-Sender: jpiszcz@p34.internal.lan To: Ralf Gross cc: linux-xfs@oss.sgi.com, linux-raid@vger.kernel.org Subject: Re: mkfs options for a 16x hw raid5 and xfs (mostly large files) In-Reply-To: <20070926084924.GB30287@p15145560.pureserver.info> Message-ID: References: <498689.78850.qm@web32907.mail.mud.yahoo.com> <20070926082322.GA30287@p15145560.pureserver.info> <20070926084924.GB30287@p15145560.pureserver.info> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: ClamAV 0.91.2/4403/Wed Sep 26 00:09:09 2007 on oss.sgi.com X-Virus-Status: Clean X-archive-position: 13122 X-ecartis-version: Ecartis v1.0.0 Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com X-original-sender: jpiszcz@lucidpixels.com Precedence: bulk X-list: xfs On Wed, 26 Sep 2007, Ralf Gross wrote: > Justin Piszcz schrieb: >> What was the command line you used for that output? >> tiobench.. ? > > tiobench --numruns 3 --threads 1 --threads 2 --block 4096 --size 20000 > > --size 20000 because the server has 16 GB RAM. > > Ralf > > Here is my output on my SW RAID5 keep in mind it is currently being used so the numbers are a little slower than they probably should be: My machine only has 8 GiB of memory but I used the same command you did: This is with the 2.6.22.6 kernel, the 2.6.23-rcX/final when released is supposed to have the SW RAID5 accelerator code, correct? Unit information ================ File size = megabytes Blk Size = bytes Rate = megabytes per second CPU% = percentage of CPU used during the test Latency = milliseconds Lat% = percent of requests that took longer than X seconds CPU Eff = Rate divided by CPU% - throughput per cpu load Sequential Reads File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.6.22.6 20000 4096 1 523.01 45.79% 0.022 510.77 0.00000 0.00000 1142 2.6.22.6 20000 4096 2 501.29 85.84% 0.046 855.59 0.00000 0.00000 584 Random Reads File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.6.22.6 20000 4096 1 0.90 0.276% 13.003 74.41 0.00000 0.00000 326 2.6.22.6 20000 4096 2 1.61 1.167% 14.443 126.43 0.00000 0.00000 137 Sequential Writes File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.6.22.6 20000 4096 1 363.46 75.72% 0.030 2757.45 0.00000 0.00000 480 2.6.22.6 20000 4096 2 394.45 287.9% 0.056 2798.92 0.00000 0.00000 137 Random Writes File Blk Num Avg Maximum Lat% Lat% CPU Identifier Size Size Thr Rate (CPU%) Latency Latency >2s >10s Eff ---------------------------- ------ ----- --- ------ ------ --------- ----------- -------- -------- ----- 2.6.22.6 20000 4096 1 3.16 1.752% 0.011 1.02 0.00000 0.00000 180 2.6.22.6 20000 4096 2 3.07 3.769% 0.013 0.10 0.00000 0.00000 82