How to get number of physical processors/cores on Linux

[serveshjain]

Hi,
So far I have tried all the available utilities to find the exact number of physical cpus on Linux but never succeeded.
I have used /proc/cpuinfo file but the combination seems to work for one hosts but not for other and situation gets even worse while dealing different processors from same/different vendors like Intel , AMD etc.

Is there any c-code or utility availble which can provide this information correctly ?

Thanks
--Servesh

[RobinVossen]

Conky works fine with me.
I hope it can do what you want..
Also cat /proc/cpuinfo | grep processor works perfectly.
Cheers,
Robin

[oz]

This works pretty well for me:

grep cores /proc/cpuinfo

[bkeller]

In a C program, I use the following as a more portable mechanism:

numCPUs = sysconf(_SC_NPROCESSORS_ONLN);


my biggest problem with this is that when Hyper Threading is enabled, that reports twice as many CPUs as I would like to see being reported.

-Brion