[Beowulf] HPCG

[Benson Muite]

Maybe the following are helpful:

https://sx-aurora.github.io/posts/hpcg-tuning/
https://www.hpcadvisorycouncil.com/pdf/HPCG_Analysis_POWER8.pdf
https://link.springer.com/chapter/10.1007/978-3-030-50743-5_21
https://ulhpc-tutorials.readthedocs.io/en/latest/parallel/hybrid/HPCG/
https://www.intel.com/content/dam/www/public/us/en/documents/presentation/hpc-clusters-best-practices-performance-study.pdf
http://developer.amd.com/wp-content/resources/56420.pdf
https://upcommons.upc.edu/bitstream/handle/2117/116642/1HPCG_shared_mem_implementation_tech_report.pdf?sequence=8&isAllowed=y
https://armkeil.blob.core.windows.net/developer/Files/downloads/hpc/files/Arm-HPC-UG-ISC18/GoingArm_SC18_BSC.pdf
https://dl.acm.org/doi/10.1145/3182177

On 8/7/20 11:31 AM, Jim Cownie wrote:
>> Source is unfortunately only accessible for SPEC members. 
> 
> Spec HPG <https://www.spec.org/hpg/> (“High Performance Group”) 
> benchmarks are available free to “Non-profit/educational” users:
> 
>     /Non-profit/educational pricing for HPG suites (ACCEL, MPI2007,
>     OMP2012)/
>     The HPG benchmarks are available free of charge to organizations
>     which qualify for the non-commercial license
>     <https://www.spec.org/order.html#hpgcommercial> by submitting a
>     request <https://www.spec.org/hpgdownload.html> for a license. As
>     with all non-profit/educational licenses, the software is licensed
>     to the organization rather than an individual.
> 
> https://www.spec.org/order.html
> 
> -- Jim
> James Cownie <jcownie at gmail.com <mailto:jcownie at gmail.com>>
> Mob: +44 780 637 7146
> 
>> On 6 Aug 2020, at 20:32, Jan Wender <j.wender at web.de 
>> <mailto:j.wender at web.de>> wrote:
>>
>> Hi Prentice,
>>
>> If all you want to compare is the performance of one CPU, then you 
>> could use the SPEC benchmarks, SPECint and SPECfp. Both are available 
>> for many CPUs at spec.org <http://spec.org>. Source is unfortunately 
>> only accessible for SPEC members.
>>
>> Best, Jan
>> -- 
>> Jan Wender - j.wender at web.de <mailto:j.wender at web.de>
>>
>>> Am 05.08.2020 um 20:09 schrieb Prentice Bisbal via Beowulf 
>>> <beowulf at beowulf.org <mailto:beowulf at beowulf.org>>:
>>>
>>> Beowulfers,
>>>
>>> Do any of you have any experience using HPCG as a benchmark. I'm 
>>> trying to compare the performance of several different processors for 
>>> an upcoming purchase. I've already run LINPACK, and now I'd like to 
>>> run HPCG. It seems the only tuning parameter is the size of the local 
>>> grid in the x,y,z dimensions.
>>>
>>> While the guidelines say to increase the gridsize until the job 
>>> consumes 1/4 or more of RAM, my testing has shown that as the 
>>> gridsize goes up, so does the performance,  and it keeps going up for 
>>> me until I consume all the memory and the job gets killed by Slurm 
>>> for exceeding memory requirements.
>>>
>>> I've been doing a lot of Google searching for how to tune HPCG for 
>>> maximum results, and there are some papers for tuning HPCG for large 
>>> supercomputers. In these cases, they use x,y,z dimensions that are 
>>> not necessarily equal, but I don't understand how they determined to 
>>> use these unique values for x,y,z.
>>>
>>> When I compare my HPL results to my HPCG results, I'm getting HPCG 
>>> results that are 0.3 - 0.5% of HPL. On the HPCG Top500 list, most 
>>> systems are getting 2-3% of HPL, so I'm off by an order of magnitude.
>>>
>>> -- 
>>> Prentice
>>>
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> 
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