From owner-freebsd-smp Tue Sep 2 14:51:29 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id OAA29736 for smp-outgoing; Tue, 2 Sep 1997 14:51:29 -0700 (PDT) Received: from hutcs.cs.hut.fi (hutcs.cs.hut.fi [130.233.192.7]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id OAA29727 for ; Tue, 2 Sep 1997 14:51:25 -0700 (PDT) Received: (from apl@localhost) by hutcs.cs.hut.fi (8.8.5/8.7.3) id AAA10035; Wed, 3 Sep 1997 00:51:01 +0300 (EET DST) Message-ID: <19970903005101.00664@hutcs.cs.hut.fi> Date: Wed, 3 Sep 1997 00:51:01 +0300 From: Antti-Pekka Liedes To: freebsd-smp@freebsd.org Subject: SMP performance on P5 systems? Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.79 Sender: owner-freebsd-smp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk The current SMP performance on my Tyan Tomcat IIID dual pentium 200MMX system is not quite what I had expected, as a simple benchmark, this is what it takes for me to compile kernel, with UP kernel: make -j3 283.19s user 32.56s system 94% cpu 5:32.83 total and with SMP: make -j3 341.23s user 134.72s system 183% cpu 4:18.80 total I was expecting the wall clock time to be less for the SMP kernel, also, there seems to be quite a lot of system overhead :-/. Of course this might be because of my relatively slow disks (I use striping on two Quantum Fireballs, both on different channel of my AHA-3940U). The benchmarks at www.freebsd.org SMP pages show a lot better performance. Is it just that ppro beats pentium so much on SMP or what? -- Antti-Pekka Liedes * apl@IRC * In two hells there's JMT 6 B 406 * apl@iki.fi * one hell too many 02150 ESPOO * apl@apocalypse.tky.hut.fi * - Lucifer +358 - 9 - 468 3121 * +358 - 40 - 5873 593 * (in God's Army)