From owner-freebsd-hackers@FreeBSD.ORG Thu May 22 10:19:30 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7067037B404 for ; Thu, 22 May 2003 10:19:30 -0700 (PDT) Received: from rwcrmhc52.attbi.com (rwcrmhc52.attbi.com [216.148.227.88]) by mx1.FreeBSD.org (Postfix) with ESMTP id E503B43FAF for ; Thu, 22 May 2003 10:19:29 -0700 (PDT) (envelope-from julian@elischer.org) Received: from interjet.elischer.org (12-232-168-4.client.attbi.com[12.232.168.4]) by attbi.com (rwcrmhc52) with ESMTP id <2003052217192905200nv656e>; Thu, 22 May 2003 17:19:29 +0000 Received: from localhost (localhost.elischer.org [127.0.0.1]) by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id KAA82525; Thu, 22 May 2003 10:19:28 -0700 (PDT) Date: Thu, 22 May 2003 10:19:26 -0700 (PDT) From: Julian Elischer To: Dan Nelson In-Reply-To: <20030522165229.GA1694@dan.emsphone.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-hackers@freebsd.org cc: Daniel Eischen Subject: Re: libkse and SMP (was Re: USB bulk read & pthreads) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 May 2003 17:19:30 -0000 On Thu, 22 May 2003, Dan Nelson wrote: > In the last episode (May 22), Terry Lambert said: > > Make sure you use SCHED_4BSD, rather than SCHED_ULE, if you are using > > one of the kernel threads libraries, for now. > > > > You really should read the -current archives before attempting any of > > this, if you don't follow -current closely enough to have caught > > Jeff's message on this, or which kernel threading libraries are > > available. > > I do read -current, and I'm definitely not going anywhere near > SCHED_ULE. I just tested both libraries with today's kernel and > libraries, and was able to get a hard lockup with both libthr and > libkse. Mysql seems to run okay. Starting a threaded pike process > seems to be the killer. Unfortunately, pike's a pretty large app so > it's not easy to get a stripped-down testcase. Ok so we need to get a description of this 'lockup'. 1/ does teh whole system lock up? 2/ is this SMP? (how many cpus)? 3/ does the system respond to pings? 4/ do you have teh kernel dbugger installed, and if you do, does it respond on the console to . You may have to start you app from outside X11 on a console to be able to see the console once it has frozen if it si an X app. 5/ if it DOES go into ddb, what does 'ps' show? 6/ got a serial console? > > -- > Dan Nelson > dnelson@allantgroup.com >