Date: Tue, 21 Sep 1999 21:25:20 +0200 (MET DST) From: Mats Lofkvist <mal@algonet.se> To: adams@digitalspark.net Cc: somsky@annwn.phys.washington.edu, freebsd-smp@FreeBSD.ORG Subject: Re: Examples of FreeBSD SMP success? Message-ID: <199909211925.VAA29450@kairos.algonet.se> In-Reply-To: <Pine.BSF.4.10.9909162037530.394-100000@nightfall.digitalspark.net> (message from Adam Strohl on Thu, 16 Sep 1999 20:58:38 %2B0000 (GMT)) References: <Pine.BSF.4.10.9909162037530.394-100000@nightfall.digitalspark.net>
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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
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