Hi Helmut, I pushed some changes to the feature/Euler1D branch which should make this simulation somewhat faster. It would be great if you could test that to see if it helps with your problem. Cheers, Douglas 2016-05-18 13:29 GMT+01:00 Kühnelt Helmut <Helmut.Kuehnelt@ait.ac.at>:
Hi Spencer, hi Douglas,
Indeed, using Collections (auto => SumFac) definitively helps: Total Computation Time = 95s (180s before)
I noticed that the code runs single threaded, even though Boost_USE_MULTITHREADED is ON and OpenBlas is compiled as multi threaded. Any hints on that?
Cheers, Helmut
------------------------------ *Von:* Sherwin, Spencer J [s.sherwin@imperial.ac.uk] *Gesendet:* Mittwoch, 18. Mai 2016 10:25 *An:* Kühnelt Helmut *Cc:* nektar-users *Betreff:* Re: [Nektar-users] EulerCFE - performance issue & MPI problem
HI Helmut,
I am building with Release mode and nothing else in particular. I happen to have MPI turned on but I do not think that will make a difference.
One thing that might be worth checking is the use of openblas. I have had trouble with openblas in the past for small matrix sizes. The compilation I used will have been using the default installation in /usr/lib/libblas.a. I guess Douglas’ test will have used the Framework of Mac OS X. However looking at the set up on the compute module I do seem to have openblas loaded
(@Chris: Could you confirm what version of openblas is running on Victoria
Other configurations are: library gcc 4.9.2 boost 1.58 - installed from a module
Do you have another machine/laptop we could turn this test on?
Cheers, Spencer.
PS I had a time step of 1e-6 and attach my .xml file below