Date: Sat, 4 Feb 2006 11:15:35 +0000 From: Marcin Jessa <lists@yazzy.org> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-current@freebsd.org, gallatin@cs.duke.edu Subject: Re: machdep.cpu_idle_hlt and SMP perf? Message-ID: <20060204111535.31e42861.lists@yazzy.org> In-Reply-To: <20060203225114.GA9845@xor.obsecurity.org> References: <17379.56708.421007.613310@grasshopper.cs.duke.edu> <20060203225114.GA9845@xor.obsecurity.org>
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On Fri, 3 Feb 2006 17:51:14 -0500 Kris Kennaway <kris@obsecurity.org> wrote: > On Fri, Feb 03, 2006 at 05:47:32PM -0500, Andrew Gallatin wrote: > > > > Why dooes machdep.cpu_idle_hlt=1 drop my 10GbE network rx > > performance by a considerable amount (7.5Gbs -> 5.5Gbs)? > > I don't know, but I've set this to 0 on my machines because I also > noticed a significant performance drop on general workloads with it > set to 1. On a 32 or 64-bits CPU?
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