Hyper threading on a Precision 530 MT
Marcmo at RitchieCapital.com
Thu Jun 6 17:10:01 CDT 2002
That was it -- I didn't know about the BIOS change.
From: Matt_Domsch at Dell.com [mailto:Matt_Domsch at Dell.com]
Sent: Thursday, June 06, 2002 4:33 PM
To: Marc Mondragon
Cc: linux-poweredge at dell.com
Subject: RE: Hyper threading on a Precision 530 MT
> Is hyper threading not supposed to work on the workstation's?
It's fairly easy to see if the CPU itself supports hyperthreading. If so,
/proc/cpuinfo lists the set of flags for each processor, and included in
that list will be "ht". The 2.4.9-21 and above kernels will certainly show
this if available. Since you've got the 2.2GHz Xeon CPUs, I believe they
Then the BIOS needs to enable HT. On many systems, it's default is off.
After power-on, go into BIOS Setup to enable HT. That would certainly
explain what you're seeing.
Then, you already know about the acpismp=force trick to make the kernel
recognize it for those that don't do it automatically.
If that doesn't work, come on back and we'll try some more.
Sr. Software Engineer
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