no Hyperthreading on P4 2,4?

Jinidog · Guru Joined: 26 Nov 2003 Posts: 593 Location: Berlin

Hi,

I've a system with an Pentium4 2,4 GHz here.
/proc/cpuinfo lists in the features the ht-flag, so I think this CPU supports HyperThreading.
SMP and HyperThreading-Support is in the kernel, but /proc/cpuinfo lists just one CPU.
I thought this have to be two, if HyperThreading works.
Benchmarks are a bit on the slow side for this system.

Any idea what the problem might be?
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think4urs11 · Posted: Sat Aug 07, 2004 9:55 am Post subject:

you might have one of the 'old style' P-4 which actually can't HT, mine for example, afaik depends on a higher stepping number than mine.

processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 2.40GHz
stepping : 7
...
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
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DaMouse · Apprentice Joined: 18 Jul 2003 Posts: 233

Mines a stepping 9 and has HT, but as a good check, if it has 800MHz FSB it has HT also

'cept the 3.06GHz with 533MHz FSB but the only one from that FSB set to have HT

-DaMouse
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Jinidog · Guru Joined: 26 Nov 2003 Posts: 593 Location: Berlin

This one has stepping 4.
I'm now taking SMP-Support out of the kernel, unneeded overhead.
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Just unused Microsoft-Software is good Microsoft-Software