Core parking on Windows Seven

[tom1]

We had already noticed that the WinRAR benchmark, but also the application itself, does not benefit from Hyper-Threading Technology from Intel. In fact we had the same values ​​found on the CPU 2600K, both with 8 logical cores and both with 4 logical cores.
Now we will try to shed light on the problems and secrets of the core parking of Windows Seven.

http://www.xtremehardware.it/eng-rev...-201111226092/


UPDATE

[tom1]

added consumption

[andressergio]

yeah i did the fix and for ex BF3 was stuttering using HT, now it runs smooth

some of my friends reported nice increase in performance also with compression tools and encoding

cheers
Sergio

[Lanek]

Nice find ...

About Bulldozer or Interlagos, the problem seems a bit more complicate.. the OS don't understand how to interact with the 2 modules on full potential. i remember the article of Anandtech, where even with a single core enabled, the turbo boost was only of 18%... ( instead of 39% on more cores ) .. and it break sometimes at 1.4ghz ... not a problem on Environement dedicated to Interlagos, but a real big problem on Server 2003-2008 .

[Bojamijams]

OMG so this is why my core's (both physical and virtual) sometimes drop down from 100% usage when I encode music. CORE PARKING DAMN YOU!

Thanks for letting me know!

[WeaponX]

yeah i did the fix and for ex BF3 was stuttering using HT, now it runs smooth

some of my friends reported nice increase in performance also with compression tools and encoding

cheers
Sergio

What is this fix? basically turning off HT? Cause I get the same problems no matter what I'm playing.

[Lanek]

the fix about core parking described in the article on first post. ( disable core parking )

[tom1]

new bench guys

[Manicdan]

this is only showing how to get HT working for some apps that it does not work for right?

[savantu]

this is only showing how to get HT working for some apps that it does not work for right?

The problem is with the application actually, it's not telling the OS it can use all the threads available.

[[XC] hipno650]

great find Tom, I am going to try this on all of my i7 machines and on my bulldozer and see what happens

[Peakr]

Changing the "Attributes" did nothing for my setup but the "ValueMax" to 0 worked wonders. At least for Winrar anyway. You can see 2 cores weren't being used in task manager before the tweak now they all are.

[DeadlyFire]

How does this affect virtualization, if at all?

[andressergio]

ya thanks for this man the fix works and on the best part it solves the stutters of BF3, btw you guys changing the value be aware that there 3 places on the registry u need to change the same

on winrar when u uncompress it still uses 1 core

when u compress yes, uses all a bit of them

[behrouz]

Only on winrar :

Bulldozer CPU and non Hyper Threaded Intel CPU have not seen any improvement.

blah blah blah....

[tom1]

some improvement are provable on atom platform , or rather netbook

[fellix_bg]

Stuttering in games and some timing sensitive applications often can't be measured in benchmark numbers, so it's a good riddance in any case. Quite useless power-saving feature in a desktop machine, anyway.

[NEOAethyr]

Nice find, it's a tweak I didn't know.

It's definitely an improvement, I don't even see the load progress when starting sr3 anymore.
One other thing, and odd one, it fixes my skyrim prob.
Well sorta, I still have a prob, but it corrects it's self completely after a few secs, did so 3 times in a row so far when testing.
Why I have no freaking idea, makes no sense, but I'll take what I can get ^^.

I have to check this on a fresh install when c&q and turbo is working, doesn't work at all at the moment, I must of gutted something by accident, it was like this before the tweak.
If it doesn't screw with the power states it's a keeper.

[tom1]

definitely brings improvements to interely system

[ice_chill]

Can someone create a registry entry to enable the settings by double clicking ? So we don't have to navigate

[LostHawk]

Can someone create a registry entry to enable the settings by double clicking ? So we don't have to navigate

Just create a text file, copy paste the code here and save it as e.g. unpark.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\0cc5b647-c1df-4637-891a-dec35c318583]
"ValueMax"=dword:00000000

and if you want to put back the default value (0x40,64) e.g. park.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\0cc5b647-c1df-4637-891a-dec35c318583]
"ValueMax"=dword:00000040

[Pokerface]

I created a text file and named it with .reg, but its still a text file

[ice_chill]

Just create a text file, copy paste the code here and save it as e.g. unpark.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\0cc5b647-c1df-4637-891a-dec35c318583]
"ValueMax"=dword:00000000

and if you want to put back the default value (0x40,64) e.g. park.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\54533251-82be-4824-96c1-47b60b740d00\0cc5b647-c1df-4637-891a-dec35c318583]
"ValueMax"=dword:00000040

Works great thanks!

[Pokerface]

Ok I did that, both ways with a reg file, and went though each string, and I've still got a few cpus that say parked in the resource monitor.

[behrouz]

I created a text file and named it with .reg, but its still a text file

Alt + t in "win Explorer" ==> Tools ==> View tab ==> Remove tick : Hide extension for known file types ===> press ok