From owner-freebsd-current Tue Aug 12 11:25:43 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id LAA08954 for current-outgoing; Tue, 12 Aug 1997 11:25:43 -0700 (PDT) Received: from pluto.plutotech.com (ken@mail.plutotech.com [206.168.67.137]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id LAA08941 for ; Tue, 12 Aug 1997 11:25:17 -0700 (PDT) Received: (from ken@localhost) by pluto.plutotech.com (8.8.5/8.8.5) id MAA22693; Tue, 12 Aug 1997 12:24:36 -0600 (MDT) From: Kenneth Merry Message-Id: <199708121824.MAA22693@pluto.plutotech.com> Subject: Re: SMP machine runs really slow, last kernel changes ??? In-Reply-To: <199708121610.KAA19476@Ilsa.StevesCafe.com> from Steve Passe at "Aug 12, 97 10:10:12 am" To: smp@csn.net (Steve Passe) Date: Tue, 12 Aug 1997 12:24:36 -0600 (MDT) Cc: andreas.klemm@wup.de, andreas@klemm.gtn.com, current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL28s (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Steve Passe wrote... > Hi, > > I don't *think* its the SMP code, my test machines run fine here. I would > suspect an interaction with something else committed recently. You might > try undefing PEND_INTS in smptests.h, thats the only thing changing recently. > > Anyone else see a slowdown? Actually, I think it may have to do with the recent scheduling changes. I've seen slowdowns with both UP and SMP -current machines under load. Putting this in my config file fixes things: options NO_SCHEDULE_MODS Andreas mentioned that he didn't see the slowdown until he cranked up the two RSA crack processes. So I think it's probably the same problem.. John knows about it, and said that he would work on a fix. Ken -- Kenneth Merry ken@plutotech.com