Re: Determine clock speed

From: Peter C. Tribble (ptribble_at_hgmp.mrc.ac.uk)
Date: 01/28/05 

Date: Fri, 28 Jan 2005 21:22:42 +0000 (UTC)

In article <C9WdnRgsPMmIO2fcRVn-qw@rogers.com>,
        Josh Lessard <NOjlessardSPAM@rogers.com> writes:
> How can I determine, in software, the clock speed in MHz of the SPARC
> machine I'm using? Is there a system call/C function I can use to find
> this information?

Fairly easy using kstats

For example, assuming you're using Solaris 8 or later, the command:

kstat cpu_info:::clock_MHz

will do the trick. A fragment of C to do the same thing (with no
error checking...)

#include <kstat.h>
#include <stdio.h>
main(void)
{
    kstat_ctl_t *kc;
    kstat_t *ksp;
    kstat_named_t *kn;
    kc = kstat_open();
    /*
     * replace the two 0s by the number of your cpu
     * or walk the chain
     */
    ksp = kstat_lookup(kc, "cpu_info", 0, "cpu_info0");
    kstat_read(kc, ksp, 0);
    kn = kstat_data_lookup(ksp, "clock_MHz");
    printf("%ld\n", kn->value.i32);
    exit(0);
} 

-- 
-Peter Tribble
MRC Rosalind Franklin Centre for Genomics Research
http://www.rfcgr.mrc.ac.uk/~ptribble/ - http://ptribble.blogspot.com/