In the last few weeks the HPC|GPU group has made public several interesting testing results. The latest publications can be found on the HPC|GPU Working Group page – http://www.hpcadvisorycouncil.com/subgroups_hpc_gpu.php.
The most recent publication covered the GPU/Node optimum ratio topic, and in particular for the NAMD application (a parallel molecular dynamics code that received the 2002 Gordon Bell Award and designed for high-performance simulation of large biomolecular systems). The group was looking to indentify the desired ratio between how many GPU should be placed in a single node (from 1 to 4) in order to achieve the highest performance. The results indicate that a single GPU per node, and using more nodes is a better configuration performance wise versus packing more GPUs in a single node.
The testing effort covered other topics such as the performance gain versus the application dataset and more. You are encouraged to review the complete results on the group page. The group welcomes new testing ideas and comments – please send them to the group mailing list.
Gilad, HPC Advisory Council Chairman