From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Small Subject: Re: SiI 3726 pmp doesn't work with 2.6.38 and Marvell 88SE9123 AHCI controller Date: Thu, 07 Jul 2011 13:13:37 +0100 Message-ID: <4E15A2F1.7080106@seoss.co.uk> References: <4DEE6831.9020501@seoss.co.uk> <20110609143755.GA2615@htj.dyndns.org> <4DF136FF.2010404@seoss.co.uk> <20110610102403.GE15235@htj.dyndns.org> <4DF249BB.3040808@seoss.co.uk> <4E14C6ED.5040208@buttersideup.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from relay0.allsecurenet.com ([109.169.27.60]:59187 "EHLO relay0.allsecurenet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755856Ab1GGMNn (ORCPT ); Thu, 7 Jul 2011 08:13:43 -0400 In-Reply-To: <4E14C6ED.5040208@buttersideup.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo , Hubert Bailey , lil@marvell.com Cc: "linux-ide@vger.kernel.org" A few more data points on this issue: I've tried the 88SE9123 and the 88SE9125 card in a Windows XP machine (a relatively slow PCI-e gen1 box), and have these results: 2x 2G Hitachi drives connected via a SiI 3726, and to a SiI 3132: works for simultaneous reads with hdparm (for Windows - http://hdparm-win32.dyndns.org/hdparm/ - simultaneous read done with "start /b hdparm -t /dev/sdb & hdparm -t /dev/sdc" at windows command prompt) - read speeds at 60M per second on both drives. Reads from a single drive at 115M per second. Reads from a single drive (direct to host, not via PMP) at 117M per second. 2x 2G Hitachi drives connected via a SiI 3726, and to a SiI 3132 (Debian 6.0 2.6.32 NCQ depth any) - works for simultaneous reads with hdparm - read speeds at 60M per second on both drives. Reads from a single drive at 122M per second. Reads from a single drive (direct to host, not via PMP) at 121M per second. 2x 2G Hitachi drives connected via a SiI 3726, and to the 88SE9123 card (Windows XP mv91xx.sys v1.1.0.6 14-Feb-2011 ) - works for simultaneous reads with hdparm - read speeds at 60M per second on both drives. Reads from a single drive at 117M per second. Reads from a single drive (direct to host, not via PMP) at 130M per second. 2x 2G Hitachi drives connected via a SiI 3726, and to the 88SE9123 card ( Debian 6.0 2.6.32 NCQ depth 31 - same with any value between 2 and 31 ) - works for simultaneous reads with hdparm - read speeds at 30M per second on both drives. Reads from a single drive at 130M per second. Reads from a single drive (direct to host, not via PMP) at 130M per second. 2x 2G Hitachi drives connected via a SiI 3726, and to the 88SE9123 card ( Debian 6.0 2.6.32 NCQ depth 1 ) - works for simultaneous reads with hdparm - read speeds at 60M per second on both drives. Reads from a single drive at 130M per second. Reads from a single drive (direct to host, not via PMP) at 130M per second. 2x 2G Hitachi drives connected via a SiI 3726, and to the 88SE9125 card ( Debian 6.0 2.6.32 NCQ depth 31 - same with any value between 2 and 31 ) - works for simultaneous reads with hdparm - read speeds at 31M per second on both drives. Reads from a single drive at between 19M per second and 130M per second with NCQ depth = 31 (most often 130M), but reads from a single drive with NCQ depth = 2 varied between 5M per second and 54M per second. Reads from a single drive (direct to host, not via PMP) at 130M per second (127M per second with depth = 2). 2x 2G Hitachi drives connected via a SiI 3726, and to the 88SE9125 card ( Debian 6.0 2.6.32 NCQ 1 ) - works for simultaneous reads with hdparm - read speeds at 60M per second on both drives. Reads from a single drive at 130M per second. Reads from a single drive (direct to host, not via PMP) at 126M per second (consistantly 3M per second slower than via PMP!). Gotta dash, more testing later... Tim. -- South East Open Source Solutions Limited Registered in England and Wales with company number 06134732. Registered Office: 2 Powell Gardens, Redhill, Surrey, RH1 1TQ VAT number: 900 6633 53 http://seoss.co.uk/ +44-(0)1273-808309