topic how to tell how many physical cpu... in Operating System - Linux

how to tell how many physical cpu...

K.C. Chan — Fri, 06 May 2005 16:40:38 GMT

Is there a way to tell how many physical cpu running on a linux box (redhat) with rebooting the server and not knowing if you have HT enable?

Attached is the output from /proc/cpuinfo

Thanks.

Re: how to tell how many physical cpu...

Steven E. Protter — Fri, 06 May 2005 17:37:34 GMT

Seems pretty clear that there is only one workng CPU in the box.

If you expect two, I would start figuring out what happened to thte dead one and arranging replacement.

SEP

Re: how to tell how many physical cpu...

Stuart Browne — Fri, 06 May 2005 18:54:12 GMT

*blink* hey sep, we looking at the same thing here?

To me it looks like it's a dual-Xeon-3.2Ghz-HT (physical id 0 & 6), with both CPU's and HT operating correctly.

Re: how to tell how many physical cpu...

Gopi Sekar — Sat, 07 May 2005 06:22:59 GMT

your /proc/cpuinfo says you have dual xeon 3.2GHZ processor both Hypherthreading enabled.

if you want to find physical number of cpus, then search /proc/cpuinfo for unique 'physical id'

Gopi

Re: how to tell how many physical cpu...

Hein van den Heuvel — Sun, 08 May 2005 10:51:58 GMT

See also:
http://forums1.itrc.hp.com/service/forums/bizsupport/questionanswer.do?threadId=246357

I found this back googling for:
+linux +cpuinfo +hyper +site:itrc.hp.com

Word of warning: the cpuinfo flag value "HT" indicates whether the processor is capable of Hyperthreading, not whether it is actually active or not.

Hein.

Re: how to tell how many physical cpu...

Alex Lavrov. — Sun, 08 May 2005 11:50:41 GMT

I can recommend you this tool:

http://ezix.sourceforge.net/software/lshw.html

It gives you system information just like ioscan and it has a nice graphical interface. With this tool you can find in seconds what hardware you have in your box.

Regards.

Re: how to tell how many physical cpu...

Rick Garland — Mon, 09 May 2005 10:38:16 GMT

In the /proc filesystem/directory is a whole bunch of info concerning the system.

There is a file called 'cpuinfo' in this directory. View it.

The lshw application is a neat tool for parsing through the /proc and displaying lots of info concerning the system.