Re: Interesting scheduling times
Richard Gooch (rgooch@atnf.csiro.au)
Fri, 18 Sep 1998 17:51:24 +1000
Petko Manolov writes:
> Linus Torvalds wrote:
> >
> > PS. Here's the patch to make 2.1.122 perform as it should wrt scheduling,
> > and not save the FP register state all the time. Embarrassing.
>
> OK, i've applied your patch and got strange results:
> first time i run Richards prog i got 4us. All next
> values were 6us. I reboot the machine and the result
> was the same!
> I'm afraid i don't understand what exactly the patch
> does. At first glance only the sequence of lines is
> changed - so what? Or there is some relatione between
> "fnsave" and setting task switch bit?
Actually, after some further testing, I get the same result! The first
time it's faster, then subsequent runs are slower (when using RT
processes). For non-RT processes, the times are stable. Strange.
Regards,
Richard....
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