From owner-freebsd-smp Tue Sep 21 12:25:28 1999 Delivered-To: freebsd-smp@freebsd.org Received: from hromeo.algonet.se (hromeo.algonet.se [194.213.74.10]) by hub.freebsd.org (Postfix) with SMTP id 6A66C14F39 for ; Tue, 21 Sep 1999 12:25:23 -0700 (PDT) (envelope-from mal@algonet.se) Received: (qmail 14850 invoked from network); 21 Sep 1999 21:25:21 +0200 Received: from kent.algonet.se (194.213.74.90) by hromeo.algonet.se with SMTP; 21 Sep 1999 21:25:21 +0200 Received: from kairos.algonet.se ([194.213.74.18]) by algonet.se (BLUETAIL Mail Robustifier1.0.4) with ESMTP ; Tue, 21 Sep 1999 19:25:21 GMT Received: (mal@localhost) by kairos.algonet.se (8.8.8+Sun/8.6.12) id VAA29450; Tue, 21 Sep 1999 21:25:20 +0200 (MET DST) Date: Tue, 21 Sep 1999 21:25:20 +0200 (MET DST) Message-Id: <199909211925.VAA29450@kairos.algonet.se> X-Authentication-Warning: kairos.algonet.se: mal set sender to mal@kairos.algonet.se using -f From: Mats Lofkvist To: adams@digitalspark.net Cc: somsky@annwn.phys.washington.edu, freebsd-smp@FreeBSD.ORG In-reply-to: (message from Adam Strohl on Thu, 16 Sep 1999 20:58:38 +0000 (GMT)) Subject: Re: Examples of FreeBSD SMP success? References: Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Adam Strohl wrote: Running two copies of seti@home results in twice the number of blocks being cleared in the same amount of time as 1. How large caches do you have on that machine?!? On my kind-of-dated dual pentium pro with 256k caches a seti@home block takes 24.6 hours on one cpu, but when running two in parallell they need 43.9 hours each. So the speedup going from one to two processors is a mere 12%. Easier tasks as rc5des or parallell makes achive close to factor two speedups. (I'm running current, cvsupped and rebuilt august 14.) _ Mats Lofkvist mal@algonet.se To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message