Date: Wed, 4 Jul 2007 17:46:34 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Attilio Rao <attilio@freebsd.org> Cc: arch@freebsd.org, Alfred Perlstein <alfred@freebsd.org> Subject: Re: Fine grain select locking. Message-ID: <20070704174511.C67251@fledge.watson.org> In-Reply-To: <3bbf2fe10707040800p4e003df0p65e2b802f81ec51e@mail.gmail.com> References: <20070702230728.E552@10.0.0.1> <20070703181242.T552@10.0.0.1> <20070704105525.GU45894@elvis.mu.org> <20070704124833.W37059@fledge.watson.org> <3bbf2fe10707040800p4e003df0p65e2b802f81ec51e@mail.gmail.com>
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On Wed, 4 Jul 2007, Attilio Rao wrote: > 2007/7/4, Robert Watson <rwatson@freebsd.org>: >> There seem to be two parts of owning a benchmark: >> >> - Establishing baselines over time -- how doe FreeBSD 4.8, 5.5, 6.0, 6.1, >> 6.2, >> 6-STABLE weekly, 7-CURRENT weekly, and maybe a Linux or NetBSD version >> perform for the workload using otherwise identical configuration. >> >> - Measurement and feedback -- identifying bottlenecks, working with >> developers >> to measure the results of specific optimizations, etc, across the life >> cycle >> of the patch. > > Another problem here would be about the hardware availabilty (obviously I'm > speaking about scalability improvements). Until now, tests have been done > mainly on amd64 machines provided by Kris and Jeff, IIRC. Having a wider > range of targets would help a lot in these cases. The FreeBSD Foundation is currently working on updating the Netperf test cluster from dual-cpu HTT boxes to 8-core systems, and from 1gbps to 10gbps ethernet. Hopefully this will improve access to larger multicore systems for developers without local hardware. This project has been "in progress" for a while now, but will wrap up soon. Robert N M Watson Computer Laboratory University of Cambridge
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