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Re: Illusory Multicore Support in 5.2?
Contrablue wrote: > Greetings, > > One of the reasons I upgraded to Mathematica 5.2 was to enjoy the > benefits of multicore support. However, despite my running 5.2 on a > Windows XP x64 dual Opteron system, I have yet to see evidence that > more than one kernel thread runs in parallel (the evidence, on my > system, would be to see processor utilization rise above 50% while only > the Mathematica kernel was active). This is despite trying quite a few > evaluations of code that "should" -- according Wolfram documentation -- > initiate parallel execution on my system (numerical dot products, etc.) > > Please note, my system fully supports true multithreaded execution on > two CPUs, as evidenced by 100% CPU utilization on relevant Sandra > benchmarks and on the new multithreaded POV-Ray releases for AMD64. > > Has anyone verified multithreaded kernel operation of Mathematica 5.2 > on a dual processor Windows platform? If so, could you post a snippet > of your Mathematica expressions here? > > Thanks much! > Try using SingularValueDecomposition on a sufficiently large matrix Pratik Wolfram Research, Inc. Tech Support