Carsten Kutzner wrote:
Hi,
Mark Abraham wrote:
Lee Soin wrote:
By invoking "uname -a":
Linux sgi4700 2.6.16.46-0.12-default #1 SMP Thu May 17 14:00:09 UTC
2007 ia64 ia64 ia64 GNU/Linux
I don't know any other command to retrieve system information.
Hmm, that looks like an SGI Altix 4700. IA64 kernels work on those
machines.
Well, not exactly.
Ah, oops. I was thinking of the Altix 3700 series, which predates
Montecito. My bad.
They work in combination with Gromacs version <= 3.3.x,
but at least I have never managed to get them working with this year's
CVS Gromacs or Gromacs 4.x - see also
http://www.gromacs.org/pipermail/gmx-developers/2008-February/002405.html
The strange thing is that these inner loops have not changed since 3.3.x,
so the problem might be somewhere else. But actually the Fortran loops
have a quite decent performance on that machine compared to assembly: In
a single-CPU test I did with gmx 3.3 they were just about 10% slower.
Good to know. Lee should definitely compare performance when using
configure with and without --enable-fortran (and using
--disable-cpu-optimization to avoid needing to set the environment
variable).
Mark
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