Date: Sat, 24 Dec 2005 12:35:47 +1030 From: Kris Kennaway <kris@obsecurity.org> To: Martin Cracauer <cracauer@cons.org> Cc: freebsd-hackers@freebsd.org Subject: Re: My wish list for 6.1 Message-ID: <43ACACFB.9070308@obsecurity.org> In-Reply-To: <20051222173308.B23728@cons.org> References: <43A26FFB.9080405@samsco.org> <20051216104022.A20877@cons.org> <20051217063409.GB19094@silverwraith.com> <20051217080109.GA31849@xor.obsecurity.org> <20051222173308.B23728@cons.org>
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Martin Cracauer wrote: > > I tried to model different worklods. The parallel part of my > benchmark suite has CPU-heavy processes, short plain http, php, long > plain http and mixtures thereof. > > None of these showed the SMP kernel to be an overall disadvantage on a > one-processor system. What you want is to find a real-world workload that exercises a lot of mutexes. These exist, and they'll see the most pessimization from running SMP kernel on UP. Kris
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