[gmx-users] K20 test

Hi! When I run gromacs-4.6.1 with k20. I meet a question. I have 6 nodes.And each node has one K20.And I use one process on one node with one gpu. But the test result shows that the runtime of one node is less than that of six nodes.Is the scalability of GPU not good? Thanks! -- gmx-users

Re: [gmx-users] K20 test

Hi, No, it just means that *your simulation* does not scale. The question is very vague, hence impossible to answer without more details However, assuming that you are not running a, say, 5000 atom system over 6 nodes, the most probable reason is that you have 6 Sandy Bridge nodes with 12-16