Date: Mon, 3 Mar 2003 18:31:45 -0600 From: Andy Isaacson <adi@hexapodia.org> To: Spencer Minear <spencer_minear@securecomputing.com> Cc: freebsd-smp@freebsd.org Subject: Re: Compaq 370/380/580 G3 SMP problem details? Message-ID: <20030303183144.A18225@hexapodia.org> In-Reply-To: <200303032351.h23Npq029060@sem.sctc.com>; from spencer_minear@securecomputing.com on Mon, Mar 03, 2003 at 05:51:52PM -0600 References: <200303032351.h23Npq029060@sem.sctc.com>
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On Mon, Mar 03, 2003 at 05:51:52PM -0600, Spencer Minear wrote: > I'm told that there may have been some discussion in a FreeBSD mail > list about the real details behind the problems with new Compaq G3 > servers not running in MP mode. The root problem appears to be that > on these systems, placing a value of 0x10 in the Local APIC TPR > register results in blocking all interrupts. The spec clearly says > that this should not block interrupts with priorty greater than 1, but > it sure appears to be happening. > > As mentioned I've been lead to belive that there are some entries in > the FreeBSD mail archive discussing the details behind the problem, > but I cannot find them. I have had one customer report that upgrading > the BIOS on a 370 to the lastest reve resolved the problem on that > system. I have upgraded the BIOS on the 380 to the lastest available > from Compaq and found that did not provide any change in behavior. > > If anyone is can point me to the details that may have been discussed > or have more details on the solutions available from Compaq I would > appreciate hearing from you. See the thread "4.7 on 2 Xeons SMP?" dated January 22. Message-ID: <vqoptqo6tri.fsf@imag.fr> > Paul Saab <ps@FreeBSD.ORG> writes: > > >> By the way, this is also a problem with 5.0-release. > > > > Peter committed a fix to -current solves this problem. a RELENG_4 > > commit > > is coming shortly to fix it there as well. > > Yep ! I updated (-CURRENT) my Proliant ML370 this morning, and the fix > works well. With hypethreading enabled, FreeBSD now uses 4 CPUs. :-) > > You all did a really great job ! > Thanks a lot. -andy To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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