[Beowulf] Re: vectors vs. loops
Douglas Eadline - ClusterWorld Magazine
deadline at clusterworld.com
Thu May 5 09:32:19 PDT 2005
I find your statements and conclusions so out of context that I cannot
respond in a meaningful way.
On Wed, 4 May 2005, Philippe Blaise wrote:
> Douglas Eadline - ClusterWorld Magazine wrote:
> >On Tue, 3 May 2005, Philippe Blaise wrote:
> >>Robert G. Brown wrote:
> >>>Still, the marketplace speaks for itself. It doesn't argue, and isn't
> >>>legendary, it just is.
> >>But, does the hpc marketplace have a direction ?
> >Just as any market place it is ruled by price/performance. One could argue
> >that during the "vector machine" epoch there was an artificial market that
> >was due to the cold war. Performance at any price was an important
> >strategic issue.
> You really think, that even today, the market place is ruled by price /
> performance ratio ?
> So why don't we use millions of slow and cheap cpus ?
> With this kind of argument we must stop the research programs, and try
> to transform all the
> scientific codes for embarrisingly parallel computing !
> More seriously, the market place seems mostly governed by big US
> companies and
> financial directors.
> Moreover, remember that some years ago NEC and Fujitsu supercomputers
> have been
> taxed by the US government. (and that was not during the cold war !).
> See for example
> Today everyone should be happy to see that some companies like Cray
> are trying to do better than HP or IBM in the linux cluster area, event
> it if it's not
> the Cray of yesterday as you said.
> I think that this is partially due to the "NEC earth simulator effect",
> and that linux clusters
> performances and functionalities are not fantastic for parallel jobs
> compare to a good old T3E.
> The price/perf ratio is too simplistic.
> The marketplace at a given instant means nothing.
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