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-   -   gtx580m has bad performance under Linux with opencl (http://www.nvnews.net/vbulletin/showthread.php?t=166272)

markd75 09-14-11 09:01 AM

gtx580m has bad performance under Linux with opencl
 
Hello,


I have an Alienware M17XR3 with GTX580M. I have set it up with Ubuntu Lucid 32 bit and 2.6.38 Kernel (PAE-backport from Natty). I tried the NIVIDIA 280.13, 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 from pyopencl. I get 13 GFLOPS, which is very slow. Have set up Windows 7 today 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.


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