Question #677951 on Yade changed: https://answers.launchpad.net/yade/+question/677951
Robert Caulk posted a new comment: BTW: >>Why GPU is slower than CPU? In order to use the GPU, you need to reorgnize the data into a format that the GPU can understand and send the data through PCIe (and don't forget, this is a round trip ticket :-) ). This roundtrip costs time. Thus, there is some break even point where the cost to organize and send the data is equivalent to the time gained by solving the system on the GPU itself. Hence somewhere between 30-60k spheres. Beyond that, the GPU starts "paying for itself" by solvingthe system fast enough that it is worth it to send the data on that round trip. Of course, this all depends on hardware and simulation etc, but we found that for 350k spheres the GPU saves about 50% time compared to CPU. And finally, if you want specific flow solver stats, use: flow.getCHOLMODPerfTimings = True [1] [1]https://yade- dem.org/doc/yade.wrapper.html#yade.wrapper.FlowEngine.getCHOLMODPerfTimings -- You received this question notification because your team yade-users 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
