Re: [PATCH] x86: Export tsc related information in sysfs

From: Andi Kleen
Date: Mon May 24 2010 - 19:42:22 EST


> > As more and more systems become dependent on clocksource==tsc
> > and more and more people assume nanosecond-class measurements
> > are relatively accurate, I'd expect the accuracy of tsc_khz
> > to become more important. While desktop users might bristle
> > at an extra second of boot delay, I'll bet many server
> > farm administrators would gladly pay that upfront cost
> > if they know an option exists.
>
> Maybe something like a tsc_long_calibration=1 option would allow for
> this?

On a system with synchronized TSC and multiple cores you could also simply do
a longer calibration on another core in the background after a quick "fast
calibration"

-Andi
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