Re: Interesting scheduling times
Richard Gooch (rgooch@atnf.csiro.au)
Fri, 18 Sep 1998 16:37:04 +1000
Linus Torvalds writes:
> Yes, it happened during the switch-over to a software task-switch
> routine, but the reason the numbers got worse for some people is simply
> that I screwed up the floating point save code, and it saved _every_
> time through instead of doing the lazy save it was meant to do.
>
> The effect of this is not huge, but it's certainly noticeable. With
> that fixed, the software context switch is pretty comparable to the
> hardware one.
>
> 2.1.123 should have this context switch slowdown fixed.
I tried the patch you sent, and it makes no noticable difference on my
PPro 180 (less than 1 us).
Regards,
Richard....
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