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Development and testing of modified XNU Kernels for AMD CPUs on OS X
User avatar
by: ithasryzen1600
#28021
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)?

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User avatar
by: Norton287
#28033
Have you poked around insanelymac.com, they might have some info on multithreading.
User avatar
by: AlGrey
#28057
All the threads are used correctly on my side.
6 threads are always active but when required the remaining 6 kick in.
Attachments
CPU mode (all cores)
CPU mode (all cores)
Screen Shot 2017-09-28 at 6.38.58 PM.png (1.37 MiB) Viewed 612 times
Single core CPU (
Single core CPU (
Screen Shot 2017-09-28 at 6.37.49 PM.png (1.31 MiB) Viewed 612 times
User avatar
by: ithasryzen1600
#28514
@AlGrey,
you're right, my cpu just never came in that area where it had to kick in the remaining 6 threads :thumbup:
User avatar
by: m4mmt
#45397
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?
User avatar
by: AlGrey
#45442
Activity Monitor
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