From owner-freebsd-stable@FreeBSD.ORG Sun Mar 18 21:49:10 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 310A8106566B; Sun, 18 Mar 2012 21:49:10 +0000 (UTC) (envelope-from prvs=142406e4fa=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) by mx1.freebsd.org (Postfix) with ESMTP id 907178FC0A; Sun, 18 Mar 2012 21:49:09 +0000 (UTC) X-Spam-Processed: mail1.multiplay.co.uk, Sun, 18 Mar 2012 21:48:10 +0000 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mail1.multiplay.co.uk X-Spam-Level: X-Spam-Status: No, score=-5.0 required=6.0 tests=USER_IN_WHITELIST shortcircuit=ham autolearn=disabled version=3.2.5 Received: from r2d2 ([188.220.16.49]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50018888167.msg; Sun, 18 Mar 2012 21:48:10 +0000 X-MDRemoteIP: 188.220.16.49 X-Return-Path: prvs=142406e4fa=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk Message-ID: From: "Steven Hartland" To: "Dmitry Morozovsky" References: <4EB522A5E2744235B0680BAF97F81862@multiplay.co.uk> Date: Sun, 18 Mar 2012 21:48:15 -0000 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Cc: mav@freebsd.org, freebsd-stable@freebsd.org Subject: Re: ahci hangs on Supermicro MicroCloud second channel X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 18 Mar 2012 21:49:10 -0000 ----- Original Message ----- From: "Dmitry Morozovsky" To: "Steven Hartland" Cc: ; Sent: Sunday, March 18, 2012 8:45 PM Subject: Re: ahci hangs on Supermicro MicroCloud second channel > On Sun, 18 Mar 2012, Steven Hartland wrote: > >> > different on ada0 and ada1!): >> > ada0, MC 50-60 MBps ada1, MC 13-25 MBps >> > ada*, 5017 130+ MBps >> > >> > Could you please post SATA/AHCI BIOS settings from your machines? Thanks a >> > lot! >> >> Just AHCI configured as far as I remember. > > Microcloud has AFAIR additional settings for delaying disk spin and > enablink/disabling hotswap, but mangling these options does not change anything > for me > >> What you mean by MC vs 5017? > > platform name: MicroCloud vs 5017C-MTF, both based on the same chipset > >> How are you measuring disk speed? > > the simplest: dd if=/dev/ada0 of=/dev/null bs=1m count=16k (linear read > 16g at the beginning of disk) I'm seeing the following here:- * ada0: ATA-8 SATA 2.x device: gives 109MB/s * ada1: ATA-8 SATA 3.x device: gives 114MB/s So both pretty reasonable although not fantastic. >> What value do you have for sysctl vfs.read_max? > > default for both cases, 8 Try 32 that's what we have here set here. Not sure its been released yet but we where running a pre-release BIOS which added the ability to disabled C1E, which caused us CPU performance issue in are particular environment. Regards Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.