Date: Wed, 13 Aug 2003 12:20:33 -0400 From: "Dr. Richard E. Hawkins" <hawk@slytherin.ds.psu.edu> To: John Baldwin <jhb@FreeBSD.org> Cc: "Scott M. Likens" <damm@fpsn.net> Subject: Re: Dual P4 2.4Ghz Xeon With Hyperthreading enabled... Message-ID: <20030813162033.GD6964@slytherin.ds.psu.edu> In-Reply-To: <XFMail.20030813113514.jhb@FreeBSD.org> References: <20030813123415.GB6964@slytherin.ds.psu.edu> <XFMail.20030813113514.jhb@FreeBSD.org>
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On Wed, Aug 13, 2003 at 11:35:14AM -0400, John Baldwin wrote: > On 13-Aug-2003 Dr. Richard E. Hawkins wrote: > > On Tue, Aug 12, 2003 at 08:33:57PM -0500, Cagle, John (ISS-Houston) wrote: > >> I think the valid settings are only 0 or 1, with the default being 1 > >> which will disable all logical CPUs. If you want to enable the extra > >> logical CPUS, then set it to 0 (zero). They will come online > >> immediately. > > That can't be right. I've never done anything to configure the logical > > cpus on mine; they just showed up unexpectedly when i switched from > > stable to current. Now I have: > > slytherin ttyp1:hawk>sysctl -a | grep cpu > > kern.threads.virtual_cpu: 4 > > kern.ccpu: 1948 > > kern.smp.cpus: 4 > > hw.ncpu: 4 > > machdep.cpu_idle_hlt: 1 > > machdep.hlt_cpus: 10 > > machdep.hlt_logical_cpus: 1 > > machdep.logical_cpus_mask: 10 > > It launches four logical cpus all on it's own. It did panic during > > shutdown yesterday; If I read the messages right as it flashed by, it > > was because cpu#2 got the shutdown order. > Your logical CPU's aren't doing anything though, even though they are > started up. John's explanation is correct. I've also got the report in dmesg, SMP: AP CPU #1 Launched! SMP: AP CPU #2 Launched! SMP: AP CPU #3 Launched! Doesn't this mean that they *are* active? hawk -- Richard E. Hawkins, Asst. Prof. of Economics /"\ ASCII ribbon campaign dochawk@psu.edu Smeal 178 (814) 375-4700 \ / against HTML mail These opinions will not be those of X and postings. Penn State until it pays my retainer. / \
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