Re: 2.2.18Pre Lan Performance Rocks!

David Weinehall
2000-10-31T23:39:45Z

On Wed, Nov 01, 2000 at 01:21:03AM +0200, Matti Aarnio wrote:
> On Tue, Oct 31, 2000 at 01:36:32PM -0800, Paul Menage wrote:
> > On Tue, 31 Oct 2000, Rik van Riel wrote:
> > >Ummm, last I looked Linux held the Specweb99 record;
> > >by a wide margin...
> >
> > ... but since then IBM/Zeus appear to have taken the lead:
> >
> > http://www.spec.org/osg/web99/results/res2000q3/
> >
> > But they were using a somewhat beefier machine - has anyone got Tux
> > SpecWeb99 figures for a 12 CPU, 64 GB, 12 NIC system?
>
> Good grief, what monster hardware...
>
> Those are (of course) system results which give some impression of
> how much users can pull out of the box.
>
> Trying to make them a bit more comparable, scaling the number with
> the number of processors:
>
> Zeus 12x600MHz IBM RS64-III 7288 SpecWEB99 ~ 607 SpecWEB99/CPU
> Zeus 4x375MHz IBM Power3-II 2175 SpecWEB99 ~ 544 SpecWEB99/CPU
> TUX 1.0 8x700MHz Pentium-III-Xeon 6387 SpecWEB99 ~ 798 SpecWeb99/CPU
> IIS 2x800MHz Pentium-III-Xeon 1060 SpecWEB99 ~ 530 SpecWEB99/CPU
> IIS 1x700MHz Pentium-III-Xeon 971 SpecWEB99 = 971 SpecWEB99/CPU
>
> Ok, more workers to do the thing, but each can achieve a bit less in
> the IBM/Zeus case than TUX 1.0. The smaller IBM/Zeus test case with
> older and slower processors yields almost as good results per CPU as
> the big one. CPU clock speed increase has been lost into inter-CPU
> collisions ? (that is, bad scaling)
>
> The IIS results are also interesting in their own. Single-CPU IIS
> yields impressive PER CPU result, but adding second CPU is apparently
> quite useless excercise. Hmm... Can't be.. As if that DUAL CPU
> result is actually run in single-CPU mode. The difference can
> directly be explained by the clock rate difference..
> (Surely the runners of that test *can't* make such an elementary
> mistake!)
>
>
> To be able to compare apples and apples, I would like to see single,
> and dual CPU SpecWEB99 results with TUX. Then that apparent 20%
> better "per CPU result" of the single-CPU IIS could not be explained
> away with SMP inter-CPU communication overhead/collisions.

You mean like:

TUX 1.0 1x667MHz Pentium-IIIEB 1270 SpecWeb99
TUX 1.0 2x800MHz Pentium-III-Xeon 2200 SpecWeb99
TUX 1.0 4x700MHz Pentium-III-Xeon 4200 SpecWeb99

(Check out quarter 2 instead of q3)

Truly impressive figures imho.

/David Weinehall
_ _
// David Weinehall <tao@acc.umu.se> /> Northern lights wander \\
// Project MCA Linux hacker // Dance across the winter sky //
\> http://www.acc.umu.se/~tao/ </ Full colour fire </