[daip] Y2K on vortex

[Richard Prestage]

Hi Eric -

thanks for doing the benchmarks. I'd be interested if you could expand
on why you think the performance is dissappointing. If I understand
it, you are saying the single-cpu performance of the 450 (which if I
recall correctly has  480MHz UltraSparc IIs) is comparable to a
single-cpu P3 800MHz. This doesn't sound too bad!

Cheers,
			Richard


On Fri, 2 Mar 2001, Eric Greisen wrote:

> 
> I have tested the new mega-machine in GB.  It is a Solaris box with 4
> Gbytes of memory and at poresent no users.  I tested first with simple
> data disks and then with raid disks using the old SOL (non-Ultra
> specific load modules) and then build a SUL using -fast and the
> version 6 compiler on vortex.  The results are not so good - the
> accuracies of the images and data are fine but the speeds disappoint:
> 
> Test              DDT                Y2K
>               sec    AMark       sec    AMark
> 
> SOL /data     152    26.3       1527     26.2
> SOL /raid     142    28.2       1522     26.3
> 
> SUL /raid     165    24.2       1686     23.7
> 
> This suggests that some of the optimization done by -fast is
> counterproductive   With non-Ultra load modules the single-head
> performance matches that of a single-head of a Pentium III 800 MHz
> Linux box.
> 
> ERic
>