How do I retrieve the number of processors on C / Linux ?

Posted by Andrei Ciobanu on Stack Overflow See other posts from Stack Overflow or by Andrei Ciobanu
Published on 2010-04-22T19:48:31Z Indexed on 2010/04/23 3:03 UTC
Read the original article Hit count: 302

Filed under:

I am writing a small C application that use some threads for processing data. I want to be able to know the number of processors on a certain machine, without using system() & in combination to a small script.

The only way i can think of is to parse /proc/cpuinfo. Any other useful suggestions ?

Related posts about posix

Get seconds since epoch in any POSIX compliant shell

as seen on Stack Overflow - Search for 'Stack Overflow'
I'd like to know if there's a way to get the number of seconds since the UNIX epoch in any POSIX compliant shell, without resorting to non-POSIX languages like perl, or using non-POSIX extensions like GNU awk's strftime function. Here are some solutions I've already ruled out... date +%s //… >>> More
Where do I initialise the LANG and LC_ALL sys variables under Ubuntu 8.10?

as seen on Super User - Search for 'Super User'
Under Ubuntu 8.10, bash shell, the LANG and LC_ALL variables are not set: user@machine1:~$ locale LANG= LC_CTYPE="POSIX" LC_NUMERIC="POSIX" LC_TIME="POSIX" LC_COLLATE="POSIX" LC_MONETARY="POSIX" LC_MESSAGES="POSIX" LC_PAPER="POSIX" LC_NAME="POSIX" LC_ADDRESS="POSIX" LC_TELEPHONE="POSIX" LC_MEASUREMENT="POSIX" LC_IDENTIFICATION="POSIX" LC_ALL= Where… >>> More
how to install posix in php

as seen on Stack Overflow - Search for 'Stack Overflow'
posix does not appear when I run php -m cmd, however, I see it from the phpinfo() –enable-posix=shared on Linux with Plesk 9. Basically, I can't use posix_*() functions as described at http://www.php.net/manual/en/ref.posix.php this shows doesn't exists: if (function_exists(‘posix_getuid’)) { echo… >>> More
are posix pipes lightweight?

as seen on Stack Overflow - Search for 'Stack Overflow'
In a linux application I'm using pipes to pass information between threads. The idea behind using pipes is that I can wait for multiple pipes at once using poll(2). That works well in practice, and my threads are sleeping most of the time and only wake up if there is something to do for them. On… >>> More
C++ wrapper for posix and linux specific functions

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Do you know about any good library wrapping posix and linux functions and structures ( eg. sockets or file descriptors ) into C++ classes? For example I'm thinking about a base FileDescriptor class and some inheriting classes ( unix sockets etc ) with methods like write, read or even some syscalls… >>> More

Developer IT

How do I retrieve the number of processors on C / Linux ? - Developer IT

How do I retrieve the number of processors on C / Linux ?

c

posix

parallel-processing

Related posts about c

Related posts about posix

Get seconds since epoch in any POSIX compliant shell

Where do I initialise the LANG and LC_ALL sys variables under Ubuntu 8.10?

how to install posix in php

are posix pipes lightweight?

C++ wrapper for posix and linux specific functions

Categories cloud