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0 pointsadrian_b9mo ago0 comments

This flexibility of CUDA is a software facility, which is independent of the hardware implementation.

For any SIMD processor one can write a compiler that translates a program written for the SIMT programming model into SIMD instructions. For example, for the Intel/AMD CPUs with SSE4/AVX/AVX-512 ISAs, there exists a compiler of this kind (ispc: https://github.com/ispc/ispc).

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porridgeraisin9mo ago

Thanks, I will look into that.

However, I'm still confused about the original statement. What I had thought was that

pre-volta GPUs, each thread in a warp has to execute in lock-step. Post-volta, they can all execute different instructions.

Obviously this is a surface level understanding. How do I reconcile this with what you wrote in the other comment and this one?

j / k navigate · click thread line to collapse

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porridgeraisin9mo ago

Thanks, I will look into that.

However, I'm still confused about the original statement. What I had thought was that

pre-volta GPUs, each thread in a warp has to execute in lock-step. Post-volta, they can all execute different instructions.

Obviously this is a surface level understanding. How do I reconcile this with what you wrote in the other comment and this one?

j / k navigate · click thread line to collapse