• SONAR
  • Windows 7 & Core Parking .... a *better* way to Turn It OFF ....
2009/11/01 05:11:13
TomG
Firstly major props to new forum member sky60234 for the following method.
 
Some of you will recall my previous regedit to turn-off Win 7 Core Parking here:-  http://forum.cakewalk.com/fb.ashx?m=1852473
 
This is now superseded by a much better method.   Thanks to  sky60234   there is now an  easier  / non-destructive  /  fully reversible  way to do this - ie: no deletions of .Reg keys needed - only an entry value adjustment.

 
________________________________________________________
 
In short, here is the better method from sky60234:-
 
- Go to Regedit
 
- Find this key:-  " 0cc5b647-c1df-4637-891a-dec35c318583 "
 
- Within this key, there is a value called:  " ValueMax "
 
- This value represents the % number of cores the system will park - the default 100%  ie:  all Cores are potentially park-able
 
- Change the value from 64 to 0 so the " ValueMin "  and  " ValueMax " are both zero
 
- You will have to find the key a few times and repeat the process for each time it is found - the number of instances will depend on the number of power profiles in your system  [  in my DAW it was only found twice ]
 
- Do a full shutdown and power-off and cold-re-start
 
________________________________________________________
 
 
I have tested the above on a clean Windows 7 x64 / Clean 8.5.1 install and it works perfectly - all Cores are available at all times and none are ever parked - the result  =  even CPU loads at all times regardless of loads.
 
As sky60234 noted, the advantage of the above is that nothing at all is being deleted from the Registry -  all that is being done is that a value is being adjusted.
 
Again, major thanks and props to   sky60234  for this excellent  fix.
 
Tom
2009/11/01 06:15:39
Fret Wizz
That's a good tip.

Is that setting in any way related to 'Minimum Processor State"
 and "Maximum Processor State" in the" Processor power management"
section of "Advanced Power Settings" in Win 7?

2009/11/01 07:37:41
TomG
Hi Fret Wizz

No.

The setting in the 1st post of this thread  [ and the regedit it " replaces " in the cross-referenced thread ]  is solely to disable CPU Core Parking in Win 7 for  quad-core DAW's.

It  [ and the regedit it " replaces " in the cross-referenced thread]  are the only 2 known ways to disable CPU Core Parking in Win 7 for  quad-core DAW's.

Tom
2009/11/01 08:53:49
riojazz
Just a reminder from that other thread:

"It  only  applies to Windows 7 X64 and X32 and  only  in systems using  more  than 2 physicial CPU's  and/or  more than 2  "logical" cores - ie:  Core i7 DAW's. "
2009/11/01 09:12:56
Fret Wizz
Thanks for the info guys.

I guess this doesn't apply to me yet as even though 
I'm now wunning Win 7 my PC is a Core 2 Duo.

Building an i5 soon so it'll come in  handy then.

2009/11/01 09:23:33
eratu
Thanks for the heads-up!
2009/11/01 09:42:43
Damp Sneaker
That was easy! Big thanks to TomG and Sky60234.
2009/11/01 12:11:50
Anubis
Great stuff! I'm bookmarking this thread for when I take da leap.
2009/11/01 12:37:10
rockreid
just to be clear, does this issue include my Q9550 cpu?
2009/11/01 18:49:14
TomG
Hi rockreid !

Yes it  %100 does include your Q9550 - so if/when you go to Windows 7, you will need to make this adjustment.

As riojazz noted  it applies to  all  Windows 7 X64 and X32 installations where the system is using  more  than 2 physicial CPU's  and/or  more than 2  "logical" cores - ie:  all Intel CPU's that are Quad-Core or higher.

Tom

PS: I assume it also applies to AMD quad-core cpu's but I dont use AMD for my DAW'a any more so I cant be certain, but my expectation would be that AMD quad-core would respond to core-parking exaclty the same as the Intel quad-cores.
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