Windows 10: Getting Around Core parking in Windows 10

this isnt a Problem but for some it is

i found a utility that works (atleast for me w/ an AMD A10 7850k APU)
ParkControl - Freeware to monitor and tweak CPU core parking and frequency scaling

this worked instead of teh RegEdit solution here on teh Forums to disable Core Parking.

:)

 

FYI: SMT Configuration Error Affecting AMD Ryzen Processors in Windows

Yes, just managing core affinity per program (making all its threads use a single CCX) should be enough to mitigate this problem in a simple way.

Have no idea on how this problem relates to core parking. As far as I know, cores are parked if there is not enough workload and keeping everything on fewer cores is more energy efficient. If your question is about parking cores on each CCX, and how that
could affect scheduling forcing a process/thread to change to another CCX, than I can't answer.

I don't know for sure how Windows scheduler and core parking algorithm works, but if they fix it for Zen, I expect that they're going to park more and more cores of a CCX until it is parked, then start parking cores from the other CCX. And, as they keep track
on how much work the cores are doing, I expect them to shift the CCX that is going to get parked from time to time, whenever possible (user AFK, for example), so all the cores are used evenly.

About slow delivery, I'm on the same boat.

 

Windows 10 only use half of max cpu speed

one thing I found out recently, is that win10 disables software based core parking by default. under windows 7 it was enabled on my laptop. when core parking is enabled, the cpu is able to reach it's max rated turbo boosted speed because the other cores
are not being used. On my system 1 core gives 2.8ghz max speed, additional active cores give a lower turboboost ratio. I suspect this isn't an issue for those with the latest and greatest CPU's as the intel specification now calls for hardware based core parking.
I managed to re-enable core parking using bitsums' park control software. the park control software is also built into bitsum's process lasso software.

 

Working as in improved performance, or just placebo?

(the 40% figure is exclusively for i7, pretty much the only CPU benefiting)

 

i saw more or less a performance increase with my AMD A10-7850k

 

Placebo, nothing more. Core Parking does not reduce overall performance, disabling does not increase performance. If those cores were being used to begin with they would not have parked.

When the time comes you run something to take advantage of all threads, those cores unpark magically themselves.

If you really want to determine if it did anything, benchmark.