Re: [PATCH v2] x86: Reduce clock calibration time during slave cpu startup

Ingo Molnar
2011-08-06T06:59:20Z

* Yinghai Lu <yhlu.kernel@gmail.com> wrote:

> On Fri, Aug 5, 2011 at 6:16 AM, Jack Steiner <steiner@sgi.com> wrote:
> > Aside from the bogus comment (I'll send a V3 with a fixed comment), does the patch
> > look ok.
>
> Several months ago, Robin said that he will test updated version
>
> [PATCH] x86: Make calibrate_delay run in parallel.
>
> so any reason that you sgi guyes stop that path?

Running calibration in parallel is pretty stupid: cores/threads might
impact each other and there might be a lot of avoidable noise in the
results.

Thanks,

Ingo