From owner-freebsd-performance@FreeBSD.ORG Mon May 17 21:39:11 2010 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 73FC3106564A for ; Mon, 17 May 2010 21:39:11 +0000 (UTC) (envelope-from dieterbsd@engineer.com) Received: from imr-ma05.mx.aol.com (imr-ma05.mx.aol.com [64.12.100.31]) by mx1.freebsd.org (Postfix) with ESMTP id 34F738FC16 for ; Mon, 17 May 2010 21:39:11 +0000 (UTC) Received: from imo-da03.mx.aol.com (imo-da03.mx.aol.com [205.188.169.201]) by imr-ma05.mx.aol.com (8.14.1/8.14.1) with ESMTP id o4HLStQD018621; Mon, 17 May 2010 17:28:55 -0400 Received: from dieterbsd@engineer.com by imo-da03.mx.aol.com (mail_out_v42.9.) id n.bea.638be79d (43983); Mon, 17 May 2010 17:28:51 -0400 (EDT) Received: from smtprly-ma02.mx.aol.com (smtprly-ma02.mx.aol.com [64.12.207.141]) by cia-dd04.mx.aol.com (v129.4) with ESMTP id MAILCIADD048-5c4c4bf1b50e383; Mon, 17 May 2010 17:28:50 -0400 Received: from web-mmc-m09 (web-mmc-m09.sim.aol.com [64.12.224.142]) by smtprly-ma02.mx.aol.com (v129.4) with ESMTP id MAILSMTPRLYMA022-5c4c4bf1b50e383; Mon, 17 May 2010 17:28:46 -0400 To: freebsd-hardware@freebsd.org, freebsd-performance@freebsd.org Content-Transfer-Encoding: quoted-printable Date: Mon, 17 May 2010 17:28:45 -0400 X-MB-Message-Source: WebUI X-AOL-IP: 72.251.79.159 X-MB-Message-Type: User MIME-Version: 1.0 From: dieterbsd@engineer.com Content-Type: text/plain; charset="us-ascii"; format=flowed X-Mailer: Mail.com Webmail 31650-STANDARD Received: from 72.251.79.159 by web-mmc-m09.sysops.aol.com (64.12.224.142) with HTTP (WebMailUI); Mon, 17 May 2010 17:28:45 -0400 Message-Id: <8CCC41F10E5080B-1B6C-354B@web-mmc-m09.sysops.aol.com> X-Spam-Flag: NO X-AOL-SENDER: dieterbsd@engineer.com X-Mailman-Approved-At: Mon, 17 May 2010 22:16:10 +0000 Cc: Subject: SATA controller speed, JMB 363 vs. Sil 3132 X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 May 2010 21:39:11 -0000 I ran a few quick&dirty performance tests comparing the JMB 363 and Sil=20 3132 SATA controllers. Both are PCIe-x1 cards costing under $US20. The same pair of drives was used with both controllers. System was otherwise=20 idle. Each test was run at least 3 times and the fastest results were used. FreeBSD 8.0 amd64 Hitachi 2 TB 7200rpm drives Sil 3132 siis(4) ada[0-3] JMB 363 achi(4) ada[45] read from 1 disk: dd if=3D/dev/ada5 bs=3D1m count=3D1000 of=3D/dev/null jmb363: 128414841 bytes/sec 7.2% faster=20 than sil 3132 sil3132: 119762153 read from both disks: dd if=3D/dev/ada4 bs=3D1m count=3D1000 of=3D/dev/null & dd if=3D/dev/= ada5=20 bs=3D1m count=3D1000 of=3D/dev/null jmb363: 193589185 bytes/sec (total) 25.1% faster=20 than sil 3132 sil3132: 154734047 write to 1 disk: dd of=3D/dev/ada4 bs=3D1m count=3D1000 if=3D/dev/zero jmb363: 122418113 bytes/sec 20.1% faster=20 than sil 3132 sil3132: 101934754 write to both disks: dd of=3D/dev/ada4 bs=3D1m count=3D1000 if=3D/dev/zero & dd of=3D/dev/= ada5=20 bs=3D1m count=3D1000 if=3D/dev/zero jmb363: 175237444 bytes/sec (total) 10.1% faster=20 than sil 3132 sil3132: 159158014 read from 1 disk & write to 1 disk: dd if=3D/dev/ada4 bs=3D1m count=3D1000 of=3D/dev/null & dd of=3D/dev/= ada5=20 bs=3D1m count=3D1000 if=3D/dev/zero jmb363: 231763096 bytes/sec (total) 16.7% faster=20 than sil 3132 sil3132: 198604276 In all cases, the jmb363 outperformed the sil3132. In all cases, using both disks at once results in less than the expected performance. The Sil 3132 can write to both drives faster than it can read from both drives. I would expect reading to be at least as fast as writing.