Date: Fri, 16 Dec 2005 10:40:22 -0500 From: Martin Cracauer <cracauer@cons.org> To: Scott Long <scottl@samsco.org> Cc: hackers@FreeBSD.ORG Subject: Re: My wish list for 6.1 Message-ID: <20051216104022.A20877@cons.org> In-Reply-To: <43A26FFB.9080405@samsco.org>; from scottl@samsco.org on Fri, Dec 16, 2005 at 12:42:51AM -0700 References: <43A26FFB.9080405@samsco.org>
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Scott Long wrote on Fri, Dec 16, 2005 at 12:42:51AM -0700: > > 2. SMP kernels for install. Right now we only install a UP kernel, for > performance reasons. We should be able to package both a UP and SMP > kernel into the release bits, and have sysinstall install both. It > should also select the correct one for the target system and make that > the default on boot. If people are concerned about performance, I benchmarked a 6-beta kernel SMP versus UP on a socket 939 Opteron. The performance characteristic for the parallel tests with CPU-eaters and plain http streams in the background is different. But there certainly is no slowdown that would make us look bad when people use a SMP kernel on a one-processor machine. CPU time results: http://www.cons.org/cracauer/crabench/smpkernel.user.html Wall clock time results: http://www.cons.org/cracauer/crabench/smpkernel.wall.html General benchmark homepage (lots of AMD64 and memory benchmarking there): http://cracauer-forum.cons.org/forum/crabench.html Martin -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer <cracauer@cons.org> http://www.cons.org/cracauer/ FreeBSD - where you want to go, today. http://www.freebsd.org/
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