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Num Processors Linux

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Started by Wolfdog October 12, 2007 09:12 PM

1 comment, last by Wolfdog 16 years, 6 months ago

Wolfdog

268

Author

October 12, 2007 09:12 PM

I am using GetSystemInfo in Windows to find the number of physical processors/cores in a machine. Then I am scaling my custom thread pool accordingly. What I am looking for is an equivalent function for Linux, and I would prefer not to use any assembly to do this. Anyone know of a library function for this?

SimonForsman

7,644

October 12, 2007 09:30 PM

Quote:Original post by Wolfdog
I am using GetSystemInfo in Windows to find the number of physical processors/cores in a machine. Then I am scaling my custom thread pool accordingly. What I am looking for is an equivalent function for Linux, and I would prefer not to use any assembly to do this.

Anyone know of a library function for this?

try reading /proc/cpuinfo

Edit: might not work correctly with intel P4 cpus (HyperThreading seems to make the OS think that there are more physical cpus than there really are)
Ofcourse, treating a HT cpu as 2 cpus doesn't really hurt that much.

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Wolfdog

268

Author

October 13, 2007 12:05 AM

I think GetSystemInfo has the same problem with HT, but I have prior knowledge of the different types of hardware this will be running on and none have HT. So this is perfect, thanks.

Num Processors Linux

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