[gmx-users] A SGI Altix 3700 system with 512 Itanium 2 processors and 1Terabyte of memory

Erik Lindahl lindahl at sbc.su.se
Fri Sep 2 14:00:16 CEST 2005


Altix is yet another platform we haven't been able to test ourselves,  
so please test the new release candidate for 3.3 and report any  
compile or runtime errors (preferrably through http:// 

There are both single and double precision Itanium2 loops that  
hopefully should work.



On Sep 1, 2005, at 3:28 PM, Mark Abraham wrote:

> Naser, Md Abu wrote:
>> Hi All,
>> A double precision version of gromacs (3.2.1) was installed on A  
>> SGI Altix 3700 . Everything else is fine but when I run mdrun_d it  
>> gives me following error. Can any one advise me where might be the  
>> problems?
> Hi,
> I posted about two months back about single precision gromacs 3.2.1  
> on an Altix 3700B running pretty dismally - slower than a new Dell  
> Dimension Pentium 4. That gromacs version doesn't have optimized  
> inner loops for Itanium 2 chips, but current CVS versions do & the  
> speedup on single precision was appreciable. Both single and double  
> versions of 3.3beta CVS versions work on the machine I use. I'd  
> suggest getting a version upgrade and hoping the problem goes away :-)
> Mark
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