[petsc-dev] Anyone run STREAMS on an Apple M1 system?

Jed Brown jed at jedbrown.org
Mon Oct 18 15:48:40 CDT 2021

I don't have one, but this suggests it gets about 40 GB/s and can be saturated by a single core. I believe it uses two channels of LPDDR4X-4266, which has a theoretical peak of 68 GB/s.


The press release claims up to 400 GB/s on the Max using DDR5. I assume that's calculated based on 8 channels of LPDDR5-6400, which seems like a surprisingly big step and I'm skeptical of what will actually be realized.

Barry Smith <bsmith at petsc.dev> writes:

>    Can anyone who owns an Apple M1 system run the MPI streams benchmark? Make sure the -O3 (or something) optimization flags are turned on.
>   Thanks
>     Barry

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