Search found 2 matches

by tschwabe
24 Apr 2015, 14:18
Forum: General discussions
Topic: Performance: MPI (OpenMPI) vs. threaded (OpenMP)
Replies: 9
Views: 16857

Re: Performance: MPI (OpenMPI) vs. threaded (OpenMP)

So, first of all thanks for considering my problem. And yes: my question is indeed "Why is there no improvement in throughput when apparently the library matrix multiply should be running eight times faster?" I wouldn't care too much if just most of the code would be serial and not much can be gaine...
by tschwabe
23 Apr 2015, 10:52
Forum: General discussions
Topic: Performance: MPI (OpenMPI) vs. threaded (OpenMP)
Replies: 9
Views: 16857

Re: Performance: MPI (OpenMPI) vs. threaded (OpenMP)

I would like to add to this thread. I just installed DALTON2015 myself and was confronted with similar performance considerations and finally decided to use a serial compilation with MKL=parallel. Now I did some tests for coupled cluster response calculations (with and without direct computation of ...