[Gllug] Best option for a lot of compute power

[John Hearns]

On Sat, 2004-06-12 at 00:14, Nix wrote:
> On Mon, 07 Jun 2004, John Hearns said:
> > As regards hyperthreading, we normally switch it off on compute nodes.
> > For HPC type applications, the concensus seems to be it has no
> > advantage. But as always YMMV - worth benchmarking with/without HT with
> > your applications.
> 
> When the next GCC release happens, that may change.
> 
> (Quite a number of autovectorization patches are landing... :) )

That's interesting.

Most of our customers use the Portland or Intel compilers, in preference
to gcc.
And if you are talking Fortran 90 there is really no open source
alternative.

I'm no compiler expert, but the Intel stuff seems impressive.
It has a feature where you run your code, collect stats, then
re-optimize.


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