Re: Wrong number of cpus detected/reported

[Steven Cole]

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