Re: Detection of HyperThreading

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, May 02, 2011 at 03:47:30PM +1200, Pieter De Wit wrote:
 > Hello Guys,
 > 
 > I found something quite weird over the weekend. I have a few machines that 
 > claim they have HT (using cat /proc/cpuinfo). These machines doesn't 
 > really support HT (both with the number of threads and Intel's website)
 > 
 > I was wondering:
 > 
 > a) Is this the right list to send to (Sorry if not)

no, this list is for cpu frequency scaling. linux-kernel would have been
more appropriate. 

 > and
 > 
 > b) How is the HT flag detected ?
 > 
 > CPU's like the Core2 Duo E6300 doesn't have HT, but yet the flag is 
 > displayed ? See http://ark.intel.com/Product.aspx?id=27248 for info. I can 
 > send a dump of /proc/cpuinfo later from home.
 
the 'ht' flag in /proc/cpuinfo means "this cpu knows how to report how
many siblings it has".  On a CPU which doesn't have hyperthreading, that
number will be 0.

	Dave

--
To unsubscribe from this list: send the line "unsubscribe cpufreq" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Kernel Devel]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Forum]     [Linux SCSI]

  Powered by Linux