On Friday 10 March 2006 02:15, john stultz wrote:

> On an x86-64 AMD server using nopmtimer/clocksource=tsc:
>                                       mainline vs TOD
> gettimeofday():                               74.2%
> clock_gettime(CLOCK_MONOTONIC):               77.4%
> clock_gettime(CLOCK_REALTIME):                71.6%
> 
> Hmmmm. I'm heading out of town for the weekend in a few moments, and I'd
> really like to re-verify those numbers, but yea, that's a 25%
> improvement. Might be too good to be true, but that should get Andi's
> attention :)

What is clocksource=tsc? It doesn't exist on 64bit kernels. And what are the 
absolute
numbers?

And clock_gettime uses a completely different path from gettimeofday so if they 
have the same percentage your results look somewhat suspicious.

-Andi
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