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

[Barry Smith]

  Thanks, presumably we'll see the new Mac's there in a few days. BTW: the old streams benchmark page should point to this site; google is worthless.

  I get 24 on my Intel MacBook Pro and it also saturates with 1 core.

  Barry


> On Oct 18, 2021, at 4:48 PM, Jed Brown <jed at jedbrown.org> wrote:
> 
> 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.
> 
> https://browser.geekbench.com/v3/cpu/8931693
> 
> 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