[Beowulf] Re: [Rocks-Discuss]Intel compiler specifically tuned for SPEC2k (and other benchmarks?)

[Dr. Yong Duan]

On Tue, 10 Feb 2004, [big5] Andrew Wang wrote:

> Again, no matter how pretty the benchmarks results
> look, in the end we still need to run on the real
> system. So, what's the point of having benchmarks?
> 
> Andrew.
> 

A guidelines, I guess. A lot of CPUs (including some rather expensive 
ones and often call them HPC CPUs) perform at less than half the speed of 
consumer grade CPUs. You'd definitely avoid those, for instance.
Also, you can look at the performance in each area and figure out the 
relative performance expected to your own code. In the end, the most 
reliable benchmark is always on your own code, of course.

Whether Intel compiler has been tuned for SPEC2K is probably an open 
question. I tried various compilers on our code and found it is also tuned 
for it :), consistently 10-20% faster than others. This included 
performance on Opterons, strangely enough.

yong

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