From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 31342 invoked by uid 1002); 20 Dec 2002 23:55:59 -0000 Mailing-List: contact gentoo-dev-help@gentoo.org; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@gentoo.org Received: (qmail 30591 invoked from network); 20 Dec 2002 23:55:58 -0000 Date: Fri, 20 Dec 2002 18:53:03 -0500 (EST) From: Denis Shcherbakov To: gentoo-dev@gentoo.org In-Reply-To: <92B00EFA01D8464AB005885A5A6EDEDB2E973D@cltexch1.lendingtree.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: RE: [gentoo-dev] SMP kernel halts system - hyperthreading?? X-Archives-Salt: 549e94df-d10c-41a6-9a86-3a00ccf5c3e4 X-Archives-Hash: c77f0368414b5729768a9e0788981652 Hm. I guess this is the kernel issue then, huh. Tido- I have a very similar machine. Not Dell, though. It's got a Dual Tyan mobo in it, 2 2.2-GHz Intel Xeons (with hyperthreading), 2 GB of RDRAM, and a couple IDE hard drives. Yea - I think there are possibly some sort of scheduling conflicts happening on my machine. I use 2.4.19-gentoo-r7, and it was stable until I started running codes from a C++ numerical package. I asked the guys who wrote it, and they are saying that they run these codes all the time on SMP machines with stock RedHat 7.x installations and Debian boxes with no incidental hard-lock failures like I have seen. I have updated glibc and libc to the latest gentoo ebuilds, where I thought the problem was initially. Now since a lot of people are blaming it on the 2.4.19-gentoo-r7 kernel, I might as well join the list, if this software is proved stable on other distros using stock SMP kernel from kernel.org. I guess maybe I should just go with the vanilla's now, since they have been reported not to have these kinds of issues. Denis On Fri, 20 Dec 2002, Ciaravino, Tido wrote: i've been tracking similar issues with the new 1.4 boot CDs see gentoo bugzilla bug 11095 (and vote for it!!!) short version: i've gotten it to work properly with the vanilla-sources and xfs-sources - but something in the gentoo-sources causes my machine to lock hard (regardless of hyperthreading) My boxes are Dell PE2650 with dual 2.4G xeon 2Gig Ram & aacraid (xfs on top) (hyperthreading can be turned on/off in the bios) Hope this helps, odiT -----Original Message----- From: Riyad Kalla [mailto:rsk@u.arizona.edu] Sent: Wednesday, December 18, 2002 10:50 PM To: 'Denis Shcherbakov'; gentoo-dev@gentoo.org Subject: RE: [gentoo-dev] SMP kernel halts system - hyperthreading?? Denis, That sounds like the server at work I'm using, nice machine.. Anywya, there was a thread on something like this in the forums, and it basically turned out to be the SMP Gentoo kernel, the guy went to vanilla kernel and everything worked just dandy. Can you verify this? Maybe the kernel team needs to focus on something? Can you run 4 threads of Seti@Home to see if it kills the machine? That should be a good test as it will saturate your CPUs Best, -Riyad -----Original Message----- From: Denis Shcherbakov [mailto:deniss@Princeton.EDU] Sent: Wednesday, December 18, 2002 8:47 PM To: gentoo-dev@gentoo.org Subject: [gentoo-dev] SMP kernel halts system - hyperthreading?? Dear gentoo-dev, If some of you recall, I wrote to the list about a system halt resulting from running C++ codes and it possibly having to do with nVidia graphics or XFree 4.2.1. Well, the problem persists in text mode also. It happens when 3 or more CPU-intensive processes run simultaneously on the machine. I have an SMP kernel (2.4.19-gentoo-r7) with 2 Intel Xeon 2.2-GHz processors equipped with hyperthreading technology. I have 4 processors initialized at boot time, and 4 processors show up in "top". This is probably because of hyperthreading, as otherwise there should be only two. How do I turn off hyperthreading? Do you think hyperthreading is what's breaking my system and it could be more stable without hyperthreading? Can a certain process be confined only to a certain processor? Thanks for any help! Denis -- gentoo-dev@gentoo.org mailing list -- gentoo-dev@gentoo.org mailing list -- gentoo-dev@gentoo.org mailing list