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Multithreading on Ryzen

Posted: Thu Sep 28, 2017 9:01 pm
by ithasryzen1600
So I've succesfully built a system running 12.10.6 quite stable.
One thing I noticed when I wanted to check if my system is running at it's capabilities was that the six cores of my Ryzen are running but only 6 instead of 12 threads are being used.

SMT is turned on in UEFI, I tried Voodoo TSC sync but i guess that it's not made for this purpose.

Do you have any ideas on how to enable multithreading (hyperthreading)?

Re: Multithreading on Ryzen

Posted: Thu Sep 28, 2017 9:33 pm
by Norton287
Have you poked around insanelymac.com, they might have some info on multithreading.

Re: Multithreading on Ryzen

Posted: Thu Sep 28, 2017 10:46 pm
by AlGrey
All the threads are used correctly on my side.
6 threads are always active but when required the remaining 6 kick in.

Re: Multithreading on Ryzen

Posted: Mon Oct 02, 2017 9:35 am
by ithasryzen1600
@AlGrey,
you're right, my cpu just never came in that area where it had to kick in the remaining 6 threads :thumbup:

Re: Multithreading on Ryzen

Posted: Wed Feb 06, 2019 11:02 pm
by m4mmt
AlGrey wrote: Thu Sep 28, 2017 10:46 pm All the threads are used correctly on my side.
6 threads are always active but when required the remaining 6 kick in.
Hi, which program are you using to monitor the cores?

Re: Multithreading on Ryzen

Posted: Sat Feb 09, 2019 5:06 am
by AlGrey
Activity Monitor

Re: Multithreading on Ryzen

Posted: Fri Aug 09, 2019 5:48 am
by eppcmogen
In terminal, type: sysctl hw.logicalcpu

Im using the 3700x and it shows 16 logical cores, 8 physical cores