Dual P4 2.4Ghz Xeon With Hyperthreading enabled...
Dr. Richard E. Hawkins
hawk at slytherin.ds.psu.edu
Wed Aug 13 09:15:47 PDT 2003
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
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