Re: [OMPI users] Affinity settings for hyperthreading

Yes, sadly the terminology is badly overloaded at this stage :-( > On Jul 18, 2016, at 9:20 AM, John Hearns wrote: > > Thankyou Ralph. i guess the information I did not have in my head was that > core = physical core (not hyperthreaded core) > > On 18 July 2016 at 14:45, Ralph Castain

Re: [OMPI users] Affinity settings for hyperthreading

Thankyou Ralph. i guess the information I did not have in my head was that core = physical core (not hyperthreaded core) On 18 July 2016 at 14:45, Ralph Castain wrote: > It sounds like you just want to bind procs to cores since each core is > composed of 2 HTs. So a simple “--map-by core --b

Re: [OMPI users] Affinity settings for hyperthreading

It sounds like you just want to bind procs to cores since each core is composed of 2 HTs. So a simple “--map-by core --bind-to core" should do the trick. FWIW: the affinity settings are controlled by the bind-to option. You can use “mpirun -h” to get the list of supported options and a little