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WinRAR performance on Sandy Bridge with Core parking disabled - Page 2

post #11 of 15
Thread Starter 
I tested on x264 HD benchmark 3.0 and I didn't noticed any evident improvement.
I think this is because all logical cores are in full load in this benchmark. Core parking is (luckily) activated only when there is a light load on several cores. The system maybe believes that he can shut down some cores and increase the load on the other cores but this strategy doesn't work on WinRAR
post #12 of 15
Thread Starter 
I forgot the link to our review, where you can found more detail and tests: click
post #13 of 15
Quote:
Originally Posted by Le085 View Post

I've done some test on my i7 860 for you:
t121642_i7-860-default.png t121643_i7-860-modified.png
Same as Sandy Bridge, thus is a problem with all Hyper Threading enabled CPUs

I did the same test and saw no difference, at all. I tested with an i7 970, Xeon W3540, i5 540m, i7 2600k, and an i7 920. Two of the systems were running Server 2008 R2 SP1, the rest were running Windows 7 SP1 (a mix of Home Premium, Pro and Ultimate). All with most recent updates.

Do you have any EIST, C-state, or speed step settings enabled in your BIOS?

Was the min processor power setting in Window's advance power options at 100%?
Quote:
Originally Posted by Kand View Post

I wonder if this does things for other applications such as video encoding?

I didn't see any difference in any other test either.
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post #14 of 15
Thread Starter 
So do you think core parking is off or on? What is your score? Could you provide a screenshot of the benchmark running with task manager opened?

All settings at 100% in our systems.
post #15 of 15
Core parking in Win7 is more of a power saving feature. If you're using a desktop and you want to maximize performance, who cares about saving power? I stumbled upon this last week when I was trying to tweak out Skyrim, and was running out of options. I can say that disabling core parking gave me a slight performance increase by further minimizing the occasional stutter I get in game to next to nothing.

Only explaination I can think of is that Windows will generally spread out usage among cores, but unless usage kicks up to a certain point, your logic cores will remain parked. So, when you actually use an application that pushes your CPU, there is a very short period of time where Windows has to fire those logic cores back up. Disabling core parking just keeps all cores running at all times. I've noticed that even at windows idle, my background processes alone now utilize ALL of my cores instead of just 4 natives. The CPU usage is more evenly spread out among the cores.

I've read people marking FPS gain in several different games by giving this a shot. I think it helps people who have more progs running in the background (as well as services). For those of you that literally keep your background garbage to a minimum, this probably wont do much for you. For those of you with the newer quadcores and such, why the hell do you have such an awesome processor and care about minimizing background stuff? The CPU should chew up and spit out most background apps, while continuing to chug away at whatever game you have loaded. If you have hypterthreading enabled, this will allow you to take full advantage of that CPU at all times.

Kudos to the OP for sharing the knowledge. I was fishing around to see if anyone made a post about it before making one myself.

Edit: And one more note. Make sure you scan your registry for mulitple entries and modify each of them. You should have at least one for each profile on the computer.
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