From owner-freebsd-performance@FreeBSD.ORG Tue Aug 1 05:24:05 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 815BF16B442; Tue, 1 Aug 2006 05:22:51 +0000 (UTC) (envelope-from mv@thebeastie.org) Received: from p4.roq.com (ns1.ecoms.com [207.44.130.137]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1825D43D45; Tue, 1 Aug 2006 05:22:48 +0000 (GMT) (envelope-from mv@thebeastie.org) Received: from p4.roq.com (localhost.roq.com [127.0.0.1]) by p4.roq.com (Postfix) with ESMTP id 031C24CEE2; Tue, 1 Aug 2006 05:23:12 +0000 (GMT) Received: from vaulte.jumbuck.com (ppp166-27.static.internode.on.net [150.101.166.27]) by p4.roq.com (Postfix) with ESMTP id 99EAF4CED7; Tue, 1 Aug 2006 05:23:11 +0000 (GMT) Received: from vaulte.jumbuck.com (localhost [127.0.0.1]) by vaulte.jumbuck.com (Postfix) with ESMTP id C14028A029; Tue, 1 Aug 2006 15:22:46 +1000 (EST) Received: from [192.168.46.102] (unknown [192.168.46.250]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by vaulte.jumbuck.com (Postfix) with ESMTP id BD1D48A027; Tue, 1 Aug 2006 15:22:46 +1000 (EST) Message-ID: <44CEE526.60603@thebeastie.org> Date: Tue, 01 Aug 2006 15:22:46 +1000 From: Michael Vince User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.7.13) Gecko/20060727 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Greg Lewis References: <44C47D64.6010804@thebeastie.org> <20060725150931.GA31017@misty.eyesbeyond.com> <44C6B826.5080308@thebeastie.org> <20060726144831.GA40775@misty.eyesbeyond.com> In-Reply-To: <20060726144831.GA40775@misty.eyesbeyond.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP X-Virus-Scanned: ClamAV using ClamSMTP Cc: freebsd-performance@freebsd.org, Achilleus Mantzios , freebsd-java@freebsd.org Subject: Re: AMD64 Diablo 1.5 JDK and libthr 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: Tue, 01 Aug 2006 05:24:05 -0000 Greg Lewis wrote: >On Wed, Jul 26, 2006 at 10:32:38AM +1000, Michael Vince wrote: > > >>Greg Lewis wrote: >> >> >>>On Mon, Jul 24, 2006 at 05:57:24PM +1000, Michael Vince wrote: >>> >>> >>>>I just ran it for you now, lower then the others. >>>>libc_r average hits per minute: 6,859 >>>>libc_r session average: 3,441 >>>>libc_r transactions per minute: 2,310 >>>> >>>> >>>Is the machine UP or SMP? >>> >>> >>> >>SMP, it was rebuild using a generic 6.1 SMP kernel for all these tests, >>with HT turned off. >>I did actually record load numbers per minute and Java memory usage. I >>didn't post these numbers as load reports via top vary greatly from the >>various threading libraries. >> >> > >libc_r is pretty much automatically going to lose then, since it can only >use one of the CPUs. It would be interesting to see the comparison on a >UP machine. > > OK I rebuilt the kernel to use GENERIC with no SMP for the Java performance tests. The results between libc_r and libthr are quite similar on single CPU, libc_r runs faster on a single CPU over 2 and is actually one of the better for single CPU machines compared libpthread, as libpthread was surprisingly low on a single CPU. libc_r average hits per minute: 8,841 libc_r session average:4,481 libc_r transactions per minute: 2,947 libthr average hits per minute: 9,020 libthr session average: 4,380 libthr transactions per minute: 3,004 libpthread average hits per minute: 6,128 libpthread session average: 3,139 libpthread transactions per minute: 2,043 For completeness here is a repaste of the SMP kernel results libc_r average hits per minute: 6,859 libc_r session average: 3,441 libc_r transactions per minute: 2,310 libthr average hits per minute: 11,581 libthr session average: 5,573 libthr transactions per minute: 3861 libpthread average hits per minute: 8,823 libpthread session average: 4,500 libpthread transactions per minute: 2891 Mike From owner-freebsd-performance@FreeBSD.ORG Tue Aug 1 18:55:55 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4657B16A4DF for ; Tue, 1 Aug 2006 18:55:55 +0000 (UTC) (envelope-from mlusetti@gmail.com) Received: from py-out-1112.google.com (py-out-1112.google.com [64.233.166.177]) by mx1.FreeBSD.org (Postfix) with ESMTP id AC02B43D94 for ; Tue, 1 Aug 2006 18:55:50 +0000 (GMT) (envelope-from mlusetti@gmail.com) Received: by py-out-1112.google.com with SMTP id b36so1042658pyb for ; Tue, 01 Aug 2006 11:55:50 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=hkMlKx0+l1QqefupFTvG/EXPm0e6Xvx0Qp/UJmQ0Y31M33HGHmVrmCVlK7rzC4qI/wxsGCDgjczsMd3p21akJ0Nd3aseeX2VyvXOOkSAxqloUpmRvVOXa653A2IlYZA+i3wNdiWuWPqtYOXItZJ+IcCrM2ifDEx3JbqhLm0di6k= Received: by 10.35.57.5 with SMTP id j5mr6153861pyk; Tue, 01 Aug 2006 11:55:50 -0700 (PDT) Received: by 10.35.48.16 with HTTP; Tue, 1 Aug 2006 11:55:49 -0700 (PDT) Message-ID: Date: Tue, 1 Aug 2006 20:55:49 +0200 From: "Massimo Lusetti" To: "Michael Vince" In-Reply-To: <44CEE526.60603@thebeastie.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <44C47D64.6010804@thebeastie.org> <20060725150931.GA31017@misty.eyesbeyond.com> <44C6B826.5080308@thebeastie.org> <20060726144831.GA40775@misty.eyesbeyond.com> <44CEE526.60603@thebeastie.org> X-Mailman-Approved-At: Tue, 01 Aug 2006 20:09:49 +0000 Cc: Greg Lewis , freebsd-performance@freebsd.org, freebsd-java@freebsd.org Subject: Re: AMD64 Diablo 1.5 JDK and libthr 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: Tue, 01 Aug 2006 18:55:55 -0000 On 8/1/06, Michael Vince wrote: > libc_r average hits per minute: 8,841 > libc_r session average:4,481 > libc_r transactions per minute: 2,947 > > libthr average hits per minute: 9,020 > libthr session average: 4,380 > libthr transactions per minute: 3,004 > > libpthread average hits per minute: 6,128 > libpthread session average: 3,139 > libpthread transactions per minute: 2,043 > > For completeness here is a repaste of the SMP kernel results > libc_r average hits per minute: 6,859 > libc_r session average: 3,441 > libc_r transactions per minute: 2,310 > > libthr average hits per minute: 11,581 > libthr session average: 5,573 > libthr transactions per minute: 3861 > > libpthread average hits per minute: 8,823 > libpthread session average: 4,500 > libpthread transactions per minute: 2891 Just to clarify. This is all with and AMD64 cpu under i386 mode while under amd64 mode libthr fails with a core dump. Right? Thanks for this infos, very interesting and useful. -- Massimo http://meridio.blogspot.com From owner-freebsd-performance@FreeBSD.ORG Wed Aug 2 06:28:10 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A3AFD16A4DA; Wed, 2 Aug 2006 06:28:10 +0000 (UTC) (envelope-from mv@thebeastie.org) Received: from p4.roq.com (ns1.ecoms.com [207.44.130.137]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4131343D46; Wed, 2 Aug 2006 06:28:08 +0000 (GMT) (envelope-from mv@thebeastie.org) Received: from p4.roq.com (localhost.roq.com [127.0.0.1]) by p4.roq.com (Postfix) with ESMTP id AEB574CEFD; Wed, 2 Aug 2006 06:28:33 +0000 (GMT) Received: from vaulte.jumbuck.com (ppp166-27.static.internode.on.net [150.101.166.27]) by p4.roq.com (Postfix) with ESMTP id 518084CEFC; Wed, 2 Aug 2006 06:28:33 +0000 (GMT) Received: from vaulte.jumbuck.com (localhost [127.0.0.1]) by vaulte.jumbuck.com (Postfix) with ESMTP id 1A67E8A027; Wed, 2 Aug 2006 16:28:06 +1000 (EST) Received: from [192.168.46.102] (unknown [192.168.46.250]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by vaulte.jumbuck.com (Postfix) with ESMTP id 164EA8A023; Wed, 2 Aug 2006 16:28:06 +1000 (EST) Message-ID: <44D045F5.9030702@thebeastie.org> Date: Wed, 02 Aug 2006 16:28:05 +1000 From: Michael Vince User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.7.13) Gecko/20060727 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Massimo Lusetti References: <44C47D64.6010804@thebeastie.org> <20060725150931.GA31017@misty.eyesbeyond.com> <44C6B826.5080308@thebeastie.org> <20060726144831.GA40775@misty.eyesbeyond.com> <44CEE526.60603@thebeastie.org> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP X-Virus-Scanned: ClamAV using ClamSMTP Cc: Greg Lewis , freebsd-performance@freebsd.org, freebsd-java@freebsd.org Subject: Re: AMD64 Diablo 1.5 JDK and libthr 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: Wed, 02 Aug 2006 06:28:10 -0000 Massimo Lusetti wrote: > On 8/1/06, Michael Vince wrote: > >> libc_r average hits per minute: 8,841 >> libc_r session average:4,481 >> libc_r transactions per minute: 2,947 >> >> libthr average hits per minute: 9,020 >> libthr session average: 4,380 >> libthr transactions per minute: 3,004 >> >> libpthread average hits per minute: 6,128 >> libpthread session average: 3,139 >> libpthread transactions per minute: 2,043 >> >> For completeness here is a repaste of the SMP kernel results >> libc_r average hits per minute: 6,859 >> libc_r session average: 3,441 >> libc_r transactions per minute: 2,310 >> >> libthr average hits per minute: 11,581 >> libthr session average: 5,573 >> libthr transactions per minute: 3861 >> >> libpthread average hits per minute: 8,823 >> libpthread session average: 4,500 >> libpthread transactions per minute: 2891 > > > > Just to clarify. This is all with and AMD64 cpu under i386 mode while > under amd64 mode libthr fails with a core dump. Right? > Thanks for this infos, very interesting and useful. Yes, although I find that way a difficult way to describe it :) Mike From owner-freebsd-performance@FreeBSD.ORG Thu Aug 3 03:59:30 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 93E4616A4DE for ; Thu, 3 Aug 2006 03:59:30 +0000 (UTC) (envelope-from kevin.taber@gmail.com) Received: from nz-out-0102.google.com (nz-out-0102.google.com [64.233.162.201]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7185743D4C for ; Thu, 3 Aug 2006 03:59:28 +0000 (GMT) (envelope-from kevin.taber@gmail.com) Received: by nz-out-0102.google.com with SMTP id 13so384707nzn for ; Wed, 02 Aug 2006 20:59:27 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type; b=dg5tiADMI1ZEGdsSSfWFjy/jk7StD0fsvMLdEUilhfDK03NoN38pVk440G3xHzhZrE1pM3T4HzPXFJdVuVlWAm8cUyGSqHyOxCDroA8ns1bSjF0P6Uf8878h304vsqh7OVY/8h66lSFxSqXCI7/slmehN6TcGrMqSQKQE2H2c/4= Received: by 10.65.59.20 with SMTP id m20mr2485492qbk; Wed, 02 Aug 2006 20:59:24 -0700 (PDT) Received: by 10.65.103.7 with HTTP; Wed, 2 Aug 2006 20:59:24 -0700 (PDT) Message-ID: Date: Wed, 2 Aug 2006 22:59:24 -0500 From: "Kevin Taber" To: freebsd-performance@freebsd.org MIME-Version: 1.0 X-Mailman-Approved-At: Thu, 03 Aug 2006 04:03:08 +0000 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: RAID 5 stripe size and newfs args 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: Thu, 03 Aug 2006 03:59:30 -0000 Hardware: HP DL380 G4, 3.2Ghz Xeon EM64T, Smart Array 6i, 3GB RAM, 2 logical drives: 2 x 36GB Ultra320 15k and 4 x 146GB Ultra320 10k RAID setup in question: 4 x 146GB Ultra320 drives ( roughly 300GB raid 5 ) I'm setting this array up for samba use... Windows 2003 folders will redirect to a share. I'm going with a raid stripe size of 128KB, what should my newfs args be? I have heard mixed answers via IRC. Thanks, Kevin From owner-freebsd-performance@FreeBSD.ORG Thu Aug 3 04:17:22 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D0E6F16A4DA for ; Thu, 3 Aug 2006 04:17:22 +0000 (UTC) (envelope-from kevin.taber@gmail.com) Received: from nz-out-0102.google.com (nz-out-0102.google.com [64.233.162.199]) by mx1.FreeBSD.org (Postfix) with ESMTP id E205E43D55 for ; Thu, 3 Aug 2006 04:17:21 +0000 (GMT) (envelope-from kevin.taber@gmail.com) Received: by nz-out-0102.google.com with SMTP id 13so385086nzn for ; Wed, 02 Aug 2006 21:17:21 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type; b=hKUQW6HAtQx3AZww+ZPOJLEFgEuQOgHZFowEgbnYw2Wo3cM6ezPg5YIkc+1BENcuqdFP4/2JLiriv4xovrm9ufcdJxu8lLcbadiiLQ3bYbT5XctZjM8O9iSHxTAQnNhnK4lIVDBDBLKDKTyk7XEo0Dtd0P1WBKA5E9K5mK1yVFI= Received: by 10.65.116.7 with SMTP id t7mr495995qbm; Wed, 02 Aug 2006 21:17:21 -0700 (PDT) Received: by 10.65.103.7 with HTTP; Wed, 2 Aug 2006 21:17:21 -0700 (PDT) Message-ID: Date: Wed, 2 Aug 2006 23:17:21 -0500 From: "Kevin Taber" To: freebsd-performance@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: RAID 5 stripe size and newfs args 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: Thu, 03 Aug 2006 04:17:22 -0000 OS: FreeBSD 6.1 Hardware: HP DL380 G4, 3.2Ghz Xeon EM64T, Smart Array 6i, 3GB RAM, 2 logical drives: 2 x 36GB Ultra320 15k and 4 x 146GB Ultra320 10k RAID setup in question: 4 x 146GB Ultra320 drives ( roughly 300GB raid 5 ) I'm setting this array up for samba use... Windows 2003 folders will redirect to a share. I'm going with a raid stripe size of 128KB, what should my newfs args be (looking for -b -f info)? I have heard mixed answers via IRC. Thanks in advance, Kevin From owner-freebsd-performance@FreeBSD.ORG Thu Aug 3 04:32:14 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BA24D16A4DD for ; Thu, 3 Aug 2006 04:32:14 +0000 (UTC) (envelope-from anderson@centtech.com) Received: from mh1.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6DD7743D53 for ; Thu, 3 Aug 2006 04:32:14 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [192.168.42.24] (andersonbox4.centtech.com [192.168.42.24]) by mh1.centtech.com (8.13.1/8.13.1) with ESMTP id k734WDnx090154; Wed, 2 Aug 2006 23:32:13 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <44D17C5E.3020401@centtech.com> Date: Wed, 02 Aug 2006 23:32:30 -0500 From: Eric Anderson User-Agent: Thunderbird 1.5.0.5 (X11/20060802) MIME-Version: 1.0 To: Kevin Taber References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.87.1/1634/Wed Aug 2 17:32:49 2006 on mh1.centtech.com X-Virus-Status: Clean Cc: freebsd-performance@freebsd.org Subject: Re: RAID 5 stripe size and newfs args 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: Thu, 03 Aug 2006 04:32:14 -0000 On 08/02/06 22:59, Kevin Taber wrote: > Hardware: HP DL380 G4, 3.2Ghz Xeon EM64T, Smart Array 6i, 3GB RAM, 2 logical > drives: 2 x 36GB Ultra320 15k and 4 x 146GB Ultra320 10k > RAID setup in question: 4 x 146GB Ultra320 drives ( roughly 300GB raid 5 ) > > > I'm setting this array up for samba use... Windows 2003 folders will > redirect to a share. I'm going with a raid stripe size of 128KB, what > should my newfs args be? I have heard mixed answers via IRC. I think if I recall correctly you'll want to make sure your filesystem starts on one of the stripe offsets, so either at 0 bytes, or 128k byte offset. If I recall, either phk@ or scottl@ knew the right magic for that. Maybe this paper is related: http://db.usenix.org/events/fast02/schindler/schindler_html/index.html The best way to know for sure, is to test it with your type of workload (simulated or real). Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------ From owner-freebsd-performance@FreeBSD.ORG Thu Aug 3 16:15:29 2006 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C852016A4DA; Thu, 3 Aug 2006 16:15:29 +0000 (UTC) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9F3F043D45; Thu, 3 Aug 2006 16:15:29 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id 8627E1A3C23; Thu, 3 Aug 2006 09:15:29 -0700 (PDT) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id B04595125B; Thu, 3 Aug 2006 12:15:27 -0400 (EDT) Date: Thu, 3 Aug 2006 12:15:26 -0400 From: Kris Kennaway To: etalk etalk Message-ID: <20060803161525.GA42517@xor.obsecurity.org> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="ZGiS0Q5IWpPtfppv" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.2i Cc: freebsd-fs@freebsd.org, freebsd-performance@freebsd.org Subject: Re: about the performance comparsion of 6.1 vs 5.3 on amd64 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: Thu, 03 Aug 2006 16:15:29 -0000 --ZGiS0Q5IWpPtfppv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jul 14, 2006 at 05:20:00PM +0800, etalk etalk wrote: > I did some test about io performance of bsd6.1 and bsd5.3 on amd64=20 > machine , and i didn't see any obvious performance's improvement . > Is there anybody know how about the performance improvement of bsd6.1= =20 > when comparing to bsd5.3 on amd64 machine, and is there any tools that ca= n=20 > let me see the improvement. The difference is that in 6.x it is no longer locked by Giant, meaning that concurrent operations can be performed concurrently instead of being explicitly serialized. This is particularly noticeable if there are other tasks also competing for the Giant lock, such as your disk driver. See http://www.bsdcan.org/2006/papers/FilesystemPerformance.pdf for more details. Kris --ZGiS0Q5IWpPtfppv Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFE0iEdWry0BWjoQKURApASAKD24kQK64bgMkjyvXhprrbYgDRSEACgrgLV 3cix/YCZraeYdBqcG6f8cgg= =vaDW -----END PGP SIGNATURE----- --ZGiS0Q5IWpPtfppv--