[gmx-users] cpu detection in 3.2.1 double precision

[Milton Taidi Sonoda]

I've tried to install kernel 2.6.8-1.521 but it was not
possible. I had problems with the SATA_SIL option.
I have a sata hd, and in .config file that option is activated.
However in the "make modules_install" step there is a
complaint that SATA_SIL modules could not be found.

Anyway, I recompiled the kernel 2.6.5-1.358 explicitly
indicating the processor family (AMD-Opteron/Athlon64).
Even with that mdrun didn't probe SSE and SSE2.

Do you have any more advices?

David wrote:

>On Fri, 2004-08-27 at 21:55, Milton Taidi Sonoda wrote:
>  
>
>>Hi David
>>Yes, it should be. I have gromacs 3.2.1 in double precision installed
>>on Athlon MP with Linux RH 9.0 and FreeBSD 5.2.
>>Although Athon does not support it, gromacs tries to
>>probe SSE2.
>>
>>Now, on Opteron 242 I have Fedora 2, for 64 bits,
>>gromacs doesn't try to probe SSE2. At least
>>there is nothing in the log file that shows this.
>>
>>I've installed fftw-2.1.5 and gromacs 3.2.1 from
>>source code. I've also tried single precision and
>>enabling/disabling mpi, but none tried to find SSE/SSE2.
>>
>>Could the 64 bits system has something to do with this?
>>Maybe it has a different directory tree.
>>
>>    
>>
>I've tried it first on an Opteron with 32 bit OS and then on Athlon64
>with FC2, 64 bits. Both work. Although this is with the CVS code, I'm
>pretty sure nothing has changed in that bit. Have you updated to the
>latest kernel on your Opteron? Mine is at:
>
>[appel1:gmxbench/d.villin] % uname -a
>Linux appel1 2.6.8-1.521 #1 Mon Aug 16 09:01:00 EDT 2004 x86_64 x86_64
>x86_64 GNU/Linux
>
>
>  
>
>>Milton Taidi Sonoda
>>
>>David wrote:
>>
>>    
>>
>>>On Thu, 2004-08-26 at 22:46, Milton Taidi Sonoda wrote:
>>> 
>>>
>>>      
>>>
>>>>Hi
>>>>I'm testing gromacs 3.2.1 in a two nodes cluster
>>>>of opteron 242, compiled in double precision.
>>>>
>>>>I've searched the log and job files
>>>>for the stage where gromacs tries
>>>>to detect CPU version for optimization
>>>>but I didn't find it.
>>>>   
>>>>
>>>>        
>>>>
>>>It's in the md.log file. Look foor SSE:
>>>
>>>Testing x86 processor CPUID...
>>>CPU manufactured by AMD.
>>>
>>>Testing x86 SSE2 capabilities...
>>>CPU and OS support SSE2.
>>>Using Gromacs SSE2 double precision assembly innerloops.
>>>
>>>
>>>
>>> 
>>>
>>>      
>>>
>>>>I'm sure I didn't --disable-cpu-optimization
>>>>during configuration.
>>>>
>>>>Is any thing wrong?
>>>>
>>>>Is gromacs using the SSE2 or other capabilities
>>>>of opteron 242?
>>>>
>>>>Thank you.
>>>>[ ]'s
>>>>Milton Taidi Sonoda
>>>>
>>>>
>>>>_______________________________________________
>>>>gmx-users mailing list
>>>>gmx-users at gromacs.org
>>>>http://www.gromacs.org/mailman/listinfo/gmx-users
>>>>Please don't post (un)subscribe requests to the list. Use the 
>>>>www interface or send it to gmx-users-request at gromacs.org.
>>>>   
>>>>
>>>>        
>>>>
>>
>>_______________________________________________
>>gmx-users mailing list
>>gmx-users at gromacs.org
>>http://www.gromacs.org/mailman/listinfo/gmx-users
>>Please don't post (un)subscribe requests to the list. Use the 
>>www interface or send it to gmx-users-request at gromacs.org.
>>    
>>