Date: Fri, 17 Mar 2006 11:39:05 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Tom Daly <tom@dyndns.com> Subject: Re: Recommended SMP Config Message-ID: <200603171139.07121.jhb@freebsd.org> In-Reply-To: <20060317085746.S15860@quartz.bos.dyndns.com> References: <20060317085746.S15860@quartz.bos.dyndns.com>
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On Friday 17 March 2006 09:04, Tom Daly wrote: > Hi, > I'm running FreeBSD 6.0 Release (amd64) on Dell Poweredge 2850s. So far, > so good. I'm doing a pretty vanilla install of things, enabling SMP in the > kernel, and that's pretty much it. This server has 2 EM64T CPUs in it. > > When looking at top, CPU 1 rarely shows up with processes on it. systat > does show it idle most of the time. Why is this? Why do processes land on > CPU 0, 2, and 3 in most cases. > > Also, by setting machdep.hyperthreading_allowed=1, CPU 1 starts taking > process onto it. Because CPU 1 is a hyperthread. So is CPU 3 for that matter. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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