> if ( cpu_has(c, X86_FEATURE_TSC) ) {
> seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
> cpu_khz / 1000, (cpu_khz % 1000));
>
> But cpu_khz is not declared in this file.... even as extern.
>
> Any ideas to get cpu MHz (or KHz) in order to convert cycles to time
> units?
it'll be in a header
BUT
cpu_khz is NOT a constant.. power management will change the actual
frequency all the time..
and.. as I said, some processors entirely stop the tsc in the idle
loop..
Then what might be the best way to measure the time taken by a function?
Regards,
Om.
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