To elaborate

By: Anon (no.delete@this.spam.com), July 13, 2020 1:06 pm
Room: Moderated Discussions
Adrian (a.delete@this.acm.org) on July 13, 2020 1:45 pm wrote:
> Therefore, for a given power limit per socket, a CPU with 512-bit
> SIMD will always beat any CPU with narrower FP units.

On the very limited subset of very well vectorizable workloads.

> That does not necessarily mean that it is good to have maximum vector width on all cores. I believe
> that an asymmetrical dual-socket could be faster, e.g. if in one socket you would have an 8-core
> or 16-core CPU with maximum clock frequency, which will not be down-clocked when the second socket
> consumes maximum power, the second socket having e.g. a 64-core CPU with dual 512-bit FMA.

Sounds like a host CPU with GPUs.

BTW, a lot of non-vector low frequency cores is also helpful, there are parallelizable workloads that are not vector friendly.
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