Hello Jim, > So, I tried using the previous stampede.cfg included in the ET_2013_05 > branch of simfactory, the same one I used to compile my ET_2013_05 > build. This cfgfile uses the same version of IMPI but different Intel > compilers (version 13.0.2.146). The run speed shows the same trends as > when using the newer config file. Have you tried on a different machine as well?
> The parameter file I am using is EXACTLY the same, not a single change. > The run is fairly lightweight, not requiring many nodes to run (I used > 2). It is purely vacuum GR, an R1 configuration (equal-mass, > non-spinning BBH system with a small initial separation). Memory usage > in all three cases is the same, and is stable throughout the run. > > Are there new parameters that I should be setting to get similar > performance as before? New thorns that I should have active? If not, > has anyone else used stampede recently and experienced similar problems? In particular, please have a look at ticket #1512 https://trac.einsteintoolkit.org/ticket/1512 which contains a small parfile which you can use to test for particular issue in loopcontrol. The test runs in ~2 minutes or so and you should be able to verify if you see the slowdown you experienced. A workaround is to set LoopControl::settle_after_iteration = 0 . The slowdown after recovery however does not fit this picture. Yours, Roland -- My email is as private as my paper mail. I therefore support encrypting and signing email messages. Get my PGP key from http://keys.gnupg.net.
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