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What does 24GFLOPs GPU speed mean?

e14 Contributor

The 3rd bullet at: 

http://www.element14.com/community/docs/DOC-52938/l/raspberry-pi-model-a--now-available-in-eu

 

says GPU is capable of 24GFLOPs. 

Is this single-precision or double-precision?

Is it sustained or burst-mode only?

Does it rely on operands being in cache memory?

What clock frequency is the GPU?

How many parallel functional units?

What benchmark is used to measure the speed?

 

Parents

  • I was part of the team that build the  3D engine so I know it has vector floating point.

    There are a number of 'issues with that:

    1/ You are unlikely to get access to the details how to program it. It is very special and very valuable IP.

    2/ The core is designed for graphic (pixel) calculatons so it has only very few of the IEEE exceptions build in.

Reply

  • I was part of the team that build the  3D engine so I know it has vector floating point.

    There are a number of 'issues with that:

    1/ You are unlikely to get access to the details how to program it. It is very special and very valuable IP.

    2/ The core is designed for graphic (pixel) calculatons so it has only very few of the IEEE exceptions build in.

Children
  • in reply to e14 Contributor

    I think it is well understood that the GPU IP is proprietary, but many people

    have asked whether it was possible for Broadcom to develop an

    interface that exposes the 24GFLOPS of performance, but the answer

    has always been that it could perhaps be done for integers but not for floats.

    So this is an interesting relevation if in fact a floating-point array library

    could in theory be developed, even without IEEE exceptions.