From owner-freebsd-current@FreeBSD.ORG Thu Oct 21 21:08:27 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0BBA116A4CE for ; Thu, 21 Oct 2004 21:08:27 +0000 (GMT) Received: from mail3.speakeasy.net (mail3.speakeasy.net [216.254.0.203]) by mx1.FreeBSD.org (Postfix) with ESMTP id DAFCB43D41 for ; Thu, 21 Oct 2004 21:08:26 +0000 (GMT) (envelope-from jhb@FreeBSD.org) Received: (qmail 28381 invoked from network); 21 Oct 2004 21:08:26 -0000 Received: from dsl027-160-063.atl1.dsl.speakeasy.net (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) encrypted SMTP for ; 21 Oct 2004 21:08:26 -0000 Received: from [10.50.41.228] (gw1.twc.weather.com [216.133.140.1]) (authenticated bits=0) by server.baldwin.cx (8.12.11/8.12.11) with ESMTP id i9LL8MxF068843; Thu, 21 Oct 2004 17:08:23 -0400 (EDT) (envelope-from jhb@FreeBSD.org) From: John Baldwin To: freebsd-current@FreeBSD.org Date: Thu, 21 Oct 2004 17:04:22 -0400 User-Agent: KMail/1.6.2 References: <20041020220102.22207.qmail@web21127.mail.yahoo.com> In-Reply-To: <20041020220102.22207.qmail@web21127.mail.yahoo.com> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200410211704.22967.jhb@FreeBSD.org> X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on server.baldwin.cx cc: Nik Azim Azam Subject: Re: number of CPUs and IPI panic X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Oct 2004 21:08:27 -0000 On Wednesday 20 October 2004 06:01 pm, Nik Azim Azam wrote: > hello list, > > i'm doing some testing on a 6 cpu pentium II overdrive > computer with 6-CURRENT. with 6 cpus, the system will > panic easily with moderate load (previous IPI is > stuck). i edited sys/i386/sys/param.h file and lowered > the MAXCPU to 4. now the system is running with 4 cpus > and it survived a make buildworld + portupgrade at the > same time. > > is this a known problem? i can give more information > if anyone interested. My quad PII-Xeon is also very unstable. You can try setting the kern.sched.ipiwakeups.enabled sysctl to 0 to help improve the stability. It may not completely fix the problem, however. -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org