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SubjectRe: Wrong number of cpus detected/reported
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Date
On Tue, 2003-06-10 at 14:36, Samuel Flory wrote:
> John Appleby wrote:
>
> >>After the upgrade the system is reporting that the machine has 8 cpu
> >>instead of 4. I have been looking for some kind of information on the
> >>Internet (www.google.com/linux) about that but I didn't have success.
> >>
> >>
> >
> >I suspect that it is identifying 4 Xeon CPUs with Hyperthreading, which
> >will correctly double the amount of processors your kernel thinks you
> >have. Intel's Hyperthreading
> >
> >This ought to be a good thing... the only thing I don't quite understand
> >is that I thought Hyperthreading was added in 2.4.17.
> >
> >
> >
>
> Red Hat enabled basic hyperthreading support in their 2.4.9 eratta
> kernels some where along the line. I just didn't think 1.4 Xeons did
> HT. (Maybe the MP Xeons are different from the DP xeons.)

His does. From his cpuinfo:

processor : 7
vendor_id : GenuineIntel
cpu family : 15
model : 1
model name : Intel(R) Xeon(TM) CPU 1.40GHz
stepping : 1
cpu MHz : 1399.982
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
bogomips : 2798.38

See that ht flag near the end?

Don't know why he doesn't go with RH 9 or RH AS though.

Steven

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