Question #244277 on Yade changed: https://answers.launchpad.net/yade/+question/244277
Klaus Thoeni posted a new comment: Hi guys, below some interesting stats from our server [2]. So far we tested 1 core on several grid nodes. The results show that the Intel cpus are much faster than the AMD Opterons. @ Matthias: I guess this is related to your point 2 of suboptimal compilation. Is there a way of compiling yade with the Portland compiler pgcc/pgc+ (see my question [1])? Another interesting observation is that the first run is always much slower than the subsequent one. Well, this is very strange. Maybe something is cached? I might do some more testing next week but it seems I we found one reason. Cheers Klaus [1] https://answers.launchpad.net/yade/+question/244322 [2] Some statistics: For comparison I ran the exact same command on the unix prompt on three different grid nodes: - 1 core on a heavily loaded opteron grid node Job summary: All jobs finished, total time 00:02:20 Log files: uniax.py.isoPrestress=-20e6.log Bye. - 1 core on a moderate opteron grid node Job summary: All jobs finished, total time 00:01:10 Log files: uniax.py.isoPrestress=-20e6.log Bye. - 1 core on an empty opteron grid node Job summary: All jobs finished, total time 00:01:13 Log files: uniax.py.isoPrestress=-20e6.log Bye. I reran it again with 1 core on the heavily loaded node and it has a completely different time: Job summary: All jobs finished, total time 00:01:03 Log files: uniax.py.isoPrestress=-20e6.log Bye. Running it for a third and fourth time on the heavily loaded node matches the above time. - 1core on an unloaded intel cpu machine twice Job summary: log All jobs finished, total time 00:00:31 Log files: uniax.py.isoPrestress=-20e6.log Bye. Job summary: All jobs finished, total time 00:00:23 Log files: uniax.py.isoPrestress=-20e6.log -- You received this question notification because you are a member of yade-users, which is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
