Question #244634 on Yade changed: https://answers.launchpad.net/yade/+question/244634
Anton Gladky proposed the following answer: Hi Giulia, 2014-02-26 19:16 GMT+01:00 Giulia Macaro <[email protected]>: > I'm running yade-1.07.0 --performance -j on a new Ubuntu machine. The > machine has 32 cores (16 virtual), but no matter which number I specify with > -j, yade only takes 1 core to run. well, using "virtual" cores for intensive processes can slow down the performance. Usually I switch off HyperThreading for machines, which suppose to be used for Yade and any other DEM software. > I've checked the CPU usage from system monitor and htop and I can see that > it's not always the same processors being used (which means that all the > processors are working fine), but only one at the time is working at 100%, > most of the others are 0%, and a couple of them are 0.7% and 1.3%. > I've run the same performance script on an old 8 cores machines: the cores > are used as specified and, as expected, the velocity increases with the > number of cores. Please, show your CMakeCache.txt Anton -- 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
