Re: Timers and timing, was: MySQL Performance 6.0rc1

On Fri, 2005-10-28 at 10:23 +0200, Massimo Lusetti wrote:


> Yep, and on 5.3-STABLE of 12/2004 on a Xeon 2.8G
> 
>        null function: 0.00460
>             getpid(): 0.41424
>               time(): 0.55854
>       gettimeofday(): 0.54748
> 
> 
> But, while repeating, I've seen values of time() and gettimeofday()
> changing even to more then 2 secs.

These results are with
kern.timecounter.hardware: TSC
kern.timecounter.choice: TSC(800) i8254(0) dummy(-1000000)

> For the records her
> (e is the result on a Linux kernel 2.6.12-1.1380_FC3
> (Fedora Core 3) on a P4 1.8G
> 
>        null function: 0.00947
>             getpid(): 0.00988
>               time(): 3.80196
>       gettimeofday(): 4.04731

I don't know how to get infos about timecounter on linux.

Regards

-- 
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