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    NVidia opencl performance issues on Linux

    Discussion in 'Alienware 17 and M17x' started by mark75, Sep 13, 2011.

  1. mark75

    mark75 Newbie

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    Hello,


    I have an M17XR3 with GTX580M. Have set it up with Ubuntu Lucid 32 bit and 2.6.38 Kernel (PAE-backport from Natty). I tried the NIVIDIA 280.13 (directly from NVidia), bumblebee for Lucid, Ironhide for Natty, but the performance of OpenCL on the NVidia-card is very bad. As a benchmark-program I used matrix-multiply.py which is an example provided with pyopencl (just multiplies two matrices and prints the GFLOPS). I get 13 GFLOPS, which is very slow. Have set up Windows 7 today with Nividia-driver from Dell-support and ran matrix-multiply.py there, which gives me 115 GFLOPS. Seems to me something is hitting the brakes on Linux... Does anyone have any idea what could cause this?


    Thanks.
     
    mark75, Sep 13, 2011
    #1