Windows 10: What is "processor performance core parking overutilization threshold"?

I found it after updating to the latest 2004 Windows 10 Update.

I am wondering if I should keep it on 100%, If I have every single core unparked?

submitted by /u/UnknownGuyiii
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:)

 

processor power management optimization

ive been playing around with the processor power management options for quite a while already since i noticed that my old notebook's cpu (i7-720qm) struggles with running on full power (mainly due to heat i assume).

i already managed to optimize performance quite noticeably, but some of the settings are not fully clear to me resp. their default settings are quite confusing, even contradicting to their descriptions.

so if there is somebody familiar with processor power management - ie. idle and performance states and their respective settings, some explanations and recommendations would be highly appreciated.

my main aim is to make the cpu run on as few cores/threads possible, clocked as high as possible, before unparking additional cores/threads. ie. to be highly responsive for just a few tasks rather than manage multiple tasks simultaneously, and not getting
throttled because too many threads get unparked although just a few - but clocked high - would manage it better. mainly because most of my tasks much more require few but high clocked threads than more parallel processing.

here are the settings i have set currently:

processor performance increase threshold - 30%

processor performance core parking min cores - 13%

processor performance decrease threshold - 20%

processor performance core parking concurrency threshold - 95%

processor energy performance preference policy - 20%

allow throttle states - off

processor performance decrease policy - ideal

processor performance core parking parked performance state - no preference

processor performance boost policy - 100%

processor performance increase policy ideal - aggressive

processor idle demote threshold - 30%

processor performance core parking distribution threshold - 90%

processor duty cycling - disabled

processor idle disable enable - idle

processor performance core parking decrease threshold - 60%

processor performance core parking decrease policy - ideal

processor idle promote threshold - 50%

minimum processor state - 50%

processor performance autonomous mode - enabled

processor performance core parking overutilization threshold - 80%

system cooling policy - active

processor performance core parking core override - disabled

maximum processor state - 100%

processor performance boost mode - aggressive

processor performance core parking increase policy - ideal

processor performance core parking increase threshold - 80%

processor performance core parking utility distribution - disabled

processor performance core parking max cores - 100%

what confuses me a bit are the default settings in power saver & high performance profiles of

processor idle demote threshold - ps: 20% / hp: 40%

processor idle promote threshold - ps: 40% / hp: 60%

judging from their descriptions, i would actually suggest them being exactly opposite?!

any suggestions on these two options resp. how to optimize the power settings better to achieve what i explained above - as few cores/threads unparked as possible, clocked as high as possible, before unparking more, without capping
min/max states or preventing threads from parking/unparking completely?

thanks

 

How do I disable core parking in windows 10 build 10162


These are the keys I have changed to show under the advanced power settings and the values I'm using at the moment without any issues:

; Show Extra Options in Advanced Power Options
; Processor performance increase threshold, 10%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\06cadf0e-64ed-448a-8927-ce7bf90eb35d]
"Attributes"=dword:00000000
; Processor performance decrease threshold, 5%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\12a0ab44-fe28-4fa9-b3bd-4b64f44960a6]
"Attributes"=dword:00000000
; Processor performance core parking min cores, 100%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\0cc5b647-c1df-4637-891a-dec35c318583]
"Attributes"=dword:00000000
; Processor performance core parking max cores, 100%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\ea062031-0e34-4ff1-9b6d-eb1059334028]
"Attributes"=dword:00000000
; Allow Throttle States, Off
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\3b04d4fd-1cc7-4f23-ab1c-d1337819c4bb]
"Attributes"=dword:00000000
; Processor performance increase policy, IdealAgressive
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\465e1f50-b610-473a-ab58-00d1077dc418]
"Attributes"=dword:00000000
; Processor performance decrease policy, Ideal
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\40fbefc7-2e9d-4d25-a185-0cfd8574bac6]
"Attributes"=dword:00000000
; Processor performance core parking parked performance state, Lightest Performance State
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\447235c7-6a8d-4cc0-8e24-9eaf70b96e2b]
"Attributes"=dword:00000000
; Processor performance boost policy, 100%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\45bcc044-d885-43e2-8605-ee0ec6e96b59]
"Attributes"=dword:00000000
; Processor idle demote threshold, 40%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\4b92d758-5a24-4851-a470-815d78aee119]
"Attributes"=dword:00000000
; Latency sensitivity hint processor performance, 99%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\619b7505-003b-4e82-b7a6-4dd29c300971]
"Attributes"=dword:00000000
; Processor performance core parking increase policy, All Possible Cores
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\c7be0679-2817-4d69-9d02-519a537ed0c6]
"Attributes"=dword:00000000
; Processor performance core parking increase threshold, 50%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\df142941-20f3-4edf-9a4a-9c83d3d717d1]
"Attributes"=dword:00000000
; Processor performance core parking decrease threshold, 20%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\68dd2f27-a4ce-4e11-8487-3794e4135dfa]
"Attributes"=dword:00000000
; Processor idle promote threshold, 60%
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\7b224883-b3cc-4d79-819f-8374152cbe7c]
"Attributes"=dword:00000000
; Processor performance boost mode, Agressive
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\be337238-0d82-4146-a960-4f3749d470c7]
"Attributes"=dword:00000000
; Processor performance core parking utility distribution, Enabled
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\e0007330-f589-42ed-a401-5ddb10e785d3]
"Attributes"=dword:00000000

 

Set Core Parking Max

Here's all the settings relating to parking:
Code: 0cc5b647-c1df-4637-891a-dec35c318583 Processor performance core parking min cores 1299023c-bc28-4f0a-81ec-d3295a8d815d Processor performance core parking over utilization history decrease factor 2ddd5a84-5a71-437e-912a-db0b8c788732 Processor performance core parking increase time 447235c7-6a8d-4cc0-8e24-9eaf70b96e2b Processor performance core parking parked performance state 5b33697b-e89d-4d38-aa46-9e7dfb7cd2f9 Processor performance core parking affinity history threshold 68dd2f27-a4ce-4e11-8487-3794e4135dfa Processor performance core parking decrease threshold 71021b41-c749-4d21-be74-a00f335d582b Processor performance core parking decrease policy 8809c2d8-b155-42d4-bcda-0d345651b1db Processor performance core parking over utilization weighting 8f7b45e3-c393-480a-878c-f67ac3d07082 Processor performance core parking affinity history decrease factor 943c8cb6-6f93-4227-ad87-e9a3feec08d1 Processor performance core parking over utilization threshold 9ac18e92-aa3c-4e27-b307-01ae37307129 Processor performance core parking over utilization history threshold a55612aa-f624-42c6-a443-7397d064c04f Processor performance core parking core override c7be0679-2817-4d69-9d02-519a537ed0c6 Processor performance core parking increase policy df142941-20f3-4edf-9a4a-9c83d3d717d1 Processor performance core parking increase threshold dfd10d17-d5eb-45dd-877a-9a34ddd15c82 Processor performance core parking decrease time e70867f1-fa2f-4f4e-aea1-4d8a0ba23b20 Processor performance core parking affinity weighting ea062031-0e34-4ff1-9b6d-eb1059334028 Processor performance core parking max cores[/quote] Bitsum only enables 0cc5b647-c1df-4637-891a-dec35c318583 (default: 10%) and ea062031-0e34-4ff1-9b6d-eb1059334028 (default: 100%). I see now that my approach is all wrong. I recommend everyone that successfully ran my program put it back to 100 and leave it there (restart to apply if you need it now).

I think my preference would be that people modify core parking via Power Options but... the question is how many of those above options should be enabled?


Edit: I set it to 0% min cores and 0% max cores with BOINC running and Windows parked 4 (50%) of my cores. All 8 instances of BOINC were forced to those 4 active cores. I put it back to 10% min and 100% max (which is default) and Windows utilized all 8 cores, BOINC placing an instance on each.

Parking can only disable logical CPUs so that would mean Intel processors with Hyper-Threading or AMD Bulldozer chips.

Setting min cores to 100% seems to disable it.


Edit: I think I know what I'm going to do to fix this...