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What can a cpu core do that a gpu core can't do? (alien.top)

submitted 9 months ago by [email protected] to c/[email protected]

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Afaik, gpu cores a very stripped down cpu cores that do basic math, but what sort of math can cpus do that gpus can't

I'm talking, cpu core vs Tensor/Cuda cores.

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[–] [email protected] 1 points 9 months ago

Simultaneous multithreading

For what it's worth, GPUs are kind of getting SMT now with the advent of dedicated asynchronous queues for compute and memory transfers. Modern GPUs are able to draw primitives, run compute shaders and perform DMA transfers from CPU to GPU at the same time, with the first two even using the same hardware. Of course you need to be careful with where you do these as there can be hardware resource conflicts, but you can do something kind of like SMT to make use of otherwise idle hardware while the GPU is doing other work.