From owner-freebsd-bugs@FreeBSD.ORG Mon Mar 5 19:10:09 2007 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 02C9B16A401 for ; Mon, 5 Mar 2007 19:10:09 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [69.147.83.40]) by mx1.freebsd.org (Postfix) with ESMTP id CE70813C48E for ; Mon, 5 Mar 2007 19:10:08 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id l25JA8A4073570 for ; Mon, 5 Mar 2007 19:10:08 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id l25JA8if073569; Mon, 5 Mar 2007 19:10:08 GMT (envelope-from gnats) Date: Mon, 5 Mar 2007 19:10:08 GMT Message-Id: <200703051910.l25JA8if073569@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org From: Remko Lodder Cc: Subject: Re: kern/109936: SMP kernel performance problem on FSC TX600 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Remko Lodder List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Mar 2007 19:10:09 -0000 The following reply was made to PR kern/109936; it has been noted by GNATS. From: Remko Lodder To: Ludger Bolmerg Cc: freebsd-gnats-submit@FreeBSD.org Subject: Re: kern/109936: SMP kernel performance problem on FSC TX600 Date: Mon, 05 Mar 2007 20:07:02 +0100 Ludger Bolmerg wrote: >> Number: 109936 >> Category: kern >> Synopsis: SMP kernel performance problem on FSC TX600 >> Confidential: no >> Severity: serious >> Priority: high >> Responsible: freebsd-bugs >> State: open >> Quarter: >> Keywords: >> Date-Required: >> Class: sw-bug >> Submitter-Id: current-users >> Arrival-Date: Mon Mar 05 18:20:03 GMT 2007 >> Closed-Date: >> Last-Modified: >> Originator: Ludger Bolmerg >> Release: 6.2 >> Organization: >> Environment: > FreeBSD bsd60.myname.de 6.2-RELEASE-p2 FreeBSD 6.2-RELEASE-p2 #1 >> Description: > I installed FreeBSD 6.2 on a Fujitsu Siemens TX600 S3 with 2 dual core Xeon processors and 4G RAM. > Here is the link to the data sheet of the server on Fujitsu-Siemens' Web page. It may be helpful > > http://extranet.fujitsu-siemens.com/vil/pc/vil/primergy/model_line_400/rack_server/ds_prim-rx600-s3.pdf > > The SMP kernel is awfully slow. make buildkernel takes about 6 hours to complete. When I boot a UP kernel the build completes within 12 minutes. I don't see any unusual message in any log file. > > Booting the SMP kernel with kern.smp.disabled=1 shows good performance values. > > When booting the SMP kernel with > > hint.lapic.10.disabled=1 > hint.lapic.12.disabled=1 > hint.lapic.14.disabled=1 > > also results in good performance. Disabling single CPUs didn't work. I had to apply a patch provided by John Baldwin. > http://lists.freebsd.org/pipermail/freebsd-smp/2007-February/001320.html > > Disabling all but one CPU also gives good performance. As soon as the second CPU gets enabled it becomes slow again. > > > >> How-To-Repeat: > Install on same hardware >> Fix: > >> Release-Note: >> Audit-Trail: >> Unformatted: > _______________________________________________ > freebsd-bugs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-bugs > To unsubscribe, send any mail to "freebsd-bugs-unsubscribe@freebsd.org" Can you tell us what your kernel configuration is? What kind of scheduler do you use etc.. Thanks! -- Kind regards, Remko Lodder ** remko@elvandar.org FreeBSD ** remko@FreeBSD.org /* Quis custodiet ipsos custodes */