🚀 go-pugleaf

In article <1993Jan19.132612.4970@wl.com> agrafiot@wl.com (Dimitris Agrafiotis) writes:
>Is there a system call that returns the number of processors available
>on a convex?
>Thanks

getsysinfo(2) does report the number of CPUs in the box. however, if you
have set "limit concurrency n" from the shell to a lesser number, you can
also do a limit command from within a program to find out the number of
processes actually used (note that i don't know the behavior if your
launching shell is sh or ksh, i just know this works if it is csh):

#include <stdio.h>
char buf[1025];
void main (int argc, char *argv[])
{
	FILE *stream;

	if ((stream = popen("csh -c limit", "r")) == (FILE *) NULL)
	{
		fprintf (stderr, "popen failed\n");
		exit (1);
	}
	while (1)
	{
		fgets (buf, 1024, stream);
		if (feof (stream))
			break;
		fputs (buf, stdout);
	}
	exit (0);
}

say u have a 4 processor system and did "limit concurrency 2" from csh.
this should report 2 for concurrency (which you'll have to parse from
the popen stream, ie look for "concurrency"). getsysinfo(2) would report
4 CPUs...

-bill
rosenkra@convex.com

-- 
Bill Rosenkranz            |UUCP: {uunet,texsun}!convex!rosenkra
Convex Computer Corp.      |ARPA: rosenkra@convex.com