6 Replies Latest reply on Jan 8, 2013 12:04 PM by buqchucker

    clAmdBlas/sgemm far from peak performance on FirePro W7000?

    buqchucker

      Hello everybody,

       

      I just did some tests on a FirePro W7000 using

      clAmdBlas-1.8.291 on Linux (Fedora 17, kernel 3.6.10-2.fc17, x86_64).

       

      Although tuning was not possible, as written in

      http://devgurus.amd.com/message/1286114

      the performance of sgemm was lower than expected.

       

      According to the sgemm testing available in clMagma

      the speed amounted to 900 GFLOPs, although the W7000

      is advertised with 2.4 TFLOPs.

       

      Interestingly, the dgemm performance for double precision

      was in spec, that is, around 150 GFLOPs.

       

      This has been tested using a Pitcairn card (W7000) using Driver 9.003.3-121120a-151130C

      and AMDAPP-SDK v2.8

       

       

      Can anyone give a hint as to why the single precision

      performance is so far behind the peak performance?

       

       

       

      Regards,

       

       

      buqchucker