Set CPU Set masks for other processors

[RaceDriverMIKU]

The Windows 10 thread scheduler is pushing threads as much as possible to certain cores due to CPPC preferred cores, even there is an audio renderer thread priority is time critical.
When I play games supporting ASIO API(buffer size 32smps at 48KHz), I experience buffer underrun every 3~4 minutes. and it is really annoying.

Currently, I'm using it this way. but, it is always applied. I want it is applied when I launch game, or programs I want.
So, I hope there is option to select masks for other processors in masks tab.

BTW, I'm using 1CCD cores. 7840HS, 8845HS.

[RaceDriverMIKU]

Duplicated?
#42
#43

[SimonvBez]

Hello there! It does indeed sound like this could be achieved with the proposed Profile feature in #43
I really do hope I'll get to it at some point, but the truth is that I simply don't have that much time to work on it for probably the next foreseeable future, as it's not a small change.

[TsuZing]

My CPU is 5950X, and I disabled CPPC Prefer Cores in UEFI setup, this allow Windows to schedule tasks fairly within a single CCD. Have you tried this?

[RaceDriverMIKU]

My CPU is 5950X, and I disabled CPPC Prefer Cores in UEFI setup, this allow Windows to schedule tasks fairly within a single CCD. Have you tried this?

It is not possible with mobile processors, there is no option to disable CPPC prefered cores in BIOS/UEFI. so laptops, mini PCs.
There is no option at all, even no variable about it, even can not find it with scewin, smokeless UMAF.
And I already did set with desktop ryzen processors, 5700X3D, 5700X. they are working as just expected.

[TsuZing]

https://github.com/rcmaehl/NotCPUCores Try this? I'm using, it can automatically set remaining CPU core mask for other processes.
However, I don't think process affinity and priority effectively solves audio latency(or other latency), because kernel doesn't adhere to these scheduler. ISR and DPC have independent scheduler and can still be scheduled to CPU cores used for game. Therefore, I usually set game's affinity mask to CCD1 instead of CCD0, even though CCD1 has a slightly lower frequency, because there are always more ISR on CPU0.

[RaceDriverMIKU]

It is audio buffer underrun, and it sounds like this when happens.
https://youtu.be/Nz8PhB55XLU?t=912 https://youtu.be/Nz8PhB55XLU?t=2444
Happens when CPU couldn't fill the audio buffers in time.
And, thanks for suggestion, I knew it. but did tried with reserved CPU sets with CPU affinity instead of it. but it didn't work.
Well, at the end, I purchased another mini PC, and it just works almost fine. but there are still buffer underrun. but thankfully, just few times, not continuous like that. Also, CPUSetSetter mitigates symptoms even more.
But, the only thing I concern is it is always working putting every processors but game to weak cores whether game is running or not.

[TsuZing]

Since you said you purchased new PC and solve this, I suspect that audio issue is caused by some driver. 32sample 48kHz corresponds to 0.67ms buffer time, on Windows, DPC latency exceeding 0.5ms are common because Microsoft's programming is shit. I used WPA analysis, results showed that Windows kernel drivers such as ntoskrnl dxgkrnl tcpip ndis storport occasionally experience DPC latency exceeding 0.5ms, with a very low probability (about every 30min) of exceeding 1ms. Perhaps there is some driver on your old PC that keeps experiencing particularly high DPC latency, causing audio issues that you mistakenly believe are due to CPU scheduling.
You can use xperf in WPA to analyze DPC and ISR, and record times you hear audio issues. Compare with xperf's report to see which DPC or ISR has a frequency similar to you recorded, perhaps it cause audio issue.
Also you can try adjust interrupt setting in Windows power option, Interrupt Steering Settings>Interrupt Steering Mode set to Any unparked processor or Any unparked processor with time delay, and use https://github.com/spddl/GoInterruptPolicy to make your NVMe SSD, network adapter, GPU and sound card(if USB sound card, enable for USB xHCI Host controller) enabled MSI mode, and change their priority and affinity.
Many posts suggest use balanced instead of high performance Control Panel power options(I am not sure what basis these posts have). Windows 11 uses a new power mode(Windows Settings>System>Power>Power Mode), which can only be enabled when Control Panel power option set to balanced. I suggest change new power mode to balanced or best power efficiency. You can add game to Xbox Game Bar by pressing Win+G(if Windows not automatically add), this will allow Windows automatically set new power mode to high performance while playing.
These are my settings. I use 64sample 192kHz WASAPI and a USB sound card(use vendor specific driver instead of Windows universal driver), amost no audio issues.

[RaceDriverMIKU]

I also tried switching PCIe interrupt mode, interrupt steering in power plan. Windows is full of shit. a pure headache.
But, WPA analysis is beyond my knowledge.(I mean, it is much more complex than latencymon.)
Before is Beelink SER7, Now is GMKTec K8P. just basically same cores, why? their UEFI implementation? hmm.