[Mesa-users] MESA multithreaded performance

[Rob Farmer]

Hi,

There is a discussion of this in section 6 of
https://ui.adsabs.harvard.edu/abs/2019ApJS..243...10P

The short answer depends on the problem, but you're probably maxing the
benefit at ~12 threads for most problems.  I would usually say if you're
running one mesa problem at a time get a faster cpu, if you're running
multiple mesas at once then get more cores.

Rob

On Thu, 2 Jul 2020 at 16:01, Jeremy Sakstein <sakstein at hawaii.edu> wrote:

> Hi Nick,
>
> In my experience this depends on what type of star you are running. Using
> both r12266 and r12778 I found:
>
> solar mass main-sequence/RGB before helium burning/low-Z blue loops worked
> best with about 4 cores.
>
> RSP test_suite cases didn't seem to use more than two cores even when I
> requested more.
>
> Big jobs like the PPISN test_suite worked best with 16 cores.
>
> I hope this helps, I'm sure people who have tested this more
> systematically than me have a better idea.
>
> Cheers,
>
> Jeremy
>
>
>
> On Thu, Jul 2, 2020 at 9:54 AM Nicholas Herrington via Mesa-users <
> mesa-users at lists.mesastar.org> wrote:
>
>> Hi all
>>
>> I just had a quick question. I am upgrading my Linux machine and I’m just
>> wondering from people’s experience does MESA favour more cpu cores or
>> faster single core, if that makes sense?
>>
>> Trying to decide between two CPUs of same generation, one has less cores
>> but higher clock speeds and the other has more cores but lower clock speeds.
>>
>> Thanks
>> Nick
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