From: "Rupert Wood" <me@rupey.net>
To: "'Cong'" <vo.chi.cong@is.titech.ac.jp>
Cc: "'Bharathi S'" <bharathi@lantana.tenet.res.in>, <gcc-help@gcc.gnu.org>
Subject: RE: how to get the number of CPUs?
Date: Thu, 04 Jul 2002 05:52:00 -0000 [thread overview]
Message-ID: <616BE6A276E3714788D2AC35C40CD18D5EC4E6@whale.softwire.co.uk> (raw)
In-Reply-To: <616BE6A276E3714788D2AC35C40CD18D6C01F7@whale.softwire.co.uk>
Bharathi S. wrote:
> On Thu, 4 Jul 2002, Cong wrote:
> > number of CPUs on each of them. So I want to get the number of CPUs
> cpu info is avilable in /proc/cpuinfo file
> if processor is 0 then No. of CPU is 1
> Explore /proc dir you will more idea :)
Or the sysconf solution - for Solaris, at least, but this ought to be
portable:
#include <stdio.h>
#include <unistd.h>
int main(void)
{
long nProcessorsConfigured = sysconf(_SC_NPROCESSORS_CONF);
long nProcessorsOnline = sysconf(_SC_NPROCESSORS_ONLN);
if (nProcessorsConfigured != -1)
{
printf("Processors configured :
%ld\n",nProcessorsConfigured);
}
else
{
printf("Unable to read configured processor count.\n");
}
if (nProcessorsOnline != -1)
{
printf("Processors online : %ld\n",nProcessorsOnline);
}
else
{
printf("Unable to read online processor count.\n");
}
return 0;
}
Try 'man sysconf' to get a list of supported sysconf arguments and their
descriptions on your platform.
Rup.
next parent reply other threads:[~2002-07-04 12:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <616BE6A276E3714788D2AC35C40CD18D6C01F7@whale.softwire.co.uk>
2002-07-04 5:52 ` Rupert Wood [this message]
2002-07-06 21:24 ` Cong
2002-07-13 8:00 ` Nix
2002-07-04 13:11 Dockeen
[not found] <1025766825.11142.ezmlm@gcc.gnu.org>
2002-07-04 4:45 ` Cong
2002-07-04 5:30 ` Bharathi S
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