/proc/cpuinfo flags for HyperThreading and 64bit capability

Dave Jones davej at redhat.com
Tue Mar 21 08:56:40 UTC 2006


On Tue, Mar 21, 2006 at 12:44:57AM -0800, Robinson Tiemuqinke wrote:

 > [root at testnode01 ~]# cat /proc/cpuinfo | grep flags
 > 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 lm pni monitor ds_cpl
 > cid xtpr
 > 
 > In the above output, does "ht" means hyperthreading?

Yes, but also the 'siblings' field is relevant.
It's possible to have a ht CPU with no siblings. (Ie, only shows up
as single CPU)

 > and "lm" means "64bit capability"?

correct.

		Dave

-- 
http://www.codemonkey.org.uk




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