On Mar 4, 3:49 pm, ja...@njkfrudils.plus.com wrote:
> On Wednesday 04 March 2009 15:40:04 Bill Hart wrote:
>
> > This is on a K10. The runs differ significantly. Interesting.
>
> > It might have to do with the almost completely unpredictable
> > scheduling on the K10. Certainly the differences at limb n are almost
> > always made up again, or nearly so, at limb n+1, and by the end of 40
> > limbs the times are usually within a cycle or so. On average
> > performance doesn't vary.
>
> > Bill.
>
> My K8 is very stable, the K10(cuda1) a bit less so , and I found the core2
> (sage.math) to be all over the place . You could try increasing the
> precision , yet again.
>
>
>
>
>
> > 2009/3/4 Jeff Gilchrist <jeff.gilchr...@gmail.com>:
> > > On Wed, Mar 4, 2009 at 10:27 AM, Bill Hart <goodwillh...@googlemail.com>
> wrote:
> > >> I've just noticed that the times from speed are not consistent between
> > >> runs!! I thought that was almost impossible.
>
> > > I did several runs on my systems and they all agreed for me, even when
> > > the system was loaded or not.
>
> > > Jeff.
> > > - Show quoted text -
I do see some variation on my Core 2 portable but my Athlon X2 gives
consistent results. The variation on the Core 2 is not large enough to
worry about.
By the way, does anyone have a theory about the mpn_mul_1 curve (2nd
to bottom) that goes up and down regularly?
Brian
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