Re: BogoMIPS no longer supported on PowerPC?

Johannes Berg wrote:

On Wed, 2006-08-23 at 18:25 +0800, Li Yang-r58472 wrote:
 > I noticed a recent modification to __delay has changed from using empty
 > loops to reading timebase.  Thus, breaks the calculation of bogomips,
 > and makes it terribly low.  Is the bogomips no longer being supported on
 > powerpc arch?

What's there to be 'supported'? The only purpose of bogomips is
calibrating the delay loop, and that has changed now by using timebase,
hence bogomips no longer have a purpose. There was even a patch to
remove it from /proc/cpuinfo but I'm not sure whether that got applied
or not.

I missed the patch for this, but I have a related question.
What is the status of the calibration code now for PPC?
Is it just skipped?

I assume that the ability to set a preset loops_per_jiffy
is no longer relevant?
 -- Tim

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Tim Bird
Architecture Group Chair, CE Linux Forum
Senior Staff Engineer, Sony Electronics
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