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Windows 7: Downloading reduces performance

29 Jan 2010   #11

Windows 7 Ultimate 64Bit

I know you said you have installed the right driver, but let see how right it is. check the file you've downloaded with this guide.

Driver selection for your Hardware devices.

My System SpecsSystem Spec
30 Jan 2010   #12

Windows 7 Ultimate x64 | Windows XP Pro x86 | Windows Vista Ultimate x86

Pretty sure that's the right driver, everything matched.

%Marvell% = Marvell, NTamd64.6.1, NTx86.6.1,NTamd64.6.0, NTx86.6.0, NTamd64.5.2, NTx86.5.1
My System SpecsSystem Spec
30 Jan 2010   #13

Windows 7 Ultimate 64Bit

If that's the case, then it cannot have been due to W7 or your adapter.
My System SpecsSystem Spec

30 Jan 2010   #14

Windows 7

I haven't found the solution, but I have identified the culprit.

It's definitely Windows 7 networking services, I have the same problem when using torrents. It's not high bandwith that causes it, but multiple connections. I'm not getting anywhere near my router's 4048 max IP connection limit, nor my connection's 3MBps down/300KBps up max bandwith. As a matter of fact I have uTorrent at 500 global connections, down from 4000 which I used in Windows XP 32. XP could take all that and more.

I've noticed that there is a brief (1/100 second) CPU usage burst for the three Network/Firewall services in Windows 7 x64 every second or so. It is not exactly every second, sometimes the gaps are 1/2 second apart, sometimes as much as 10 seconds. It's enough to lock up every other program for just that instant, making audio skip and making frames per second stutter in games. If I shut down torrents completely, the problem fades away over about 5 seconds. If I start torrents again, it takes another minute or so to build up to a point where it's noticeable.

I haven't found a solution yet, just identified the problem. I noticed it all the way back with the early betas of Windows 7, and I'm very disappointed to see it made it to my retail copy.

You can see it happening by opening the Processes tab in your task manager, showing processes from all users and sorting by CPU usage. You will see one instance of svchost.exe pop up to 1% usage every second or so. I'm guessing Explorer averages out CPU usage, and since it's being maxed out so briefly, it displays as 1% instead of 100%. If you can click it quickly enough before it goes back down the list, you can then sort by name again to stop it moving, then right click and Go to Services, where you can see it is made up of three or four networking-related services:

NlaSvc (Network Location Awareness)
LanmanWorkstation (Workstation)
Dnscache (DNS Client)
CryptSvc (Cryptographic Services)

I don't know which of these is the culprit, because I don't know where to go from here. I can't see which of these 4 is making use of the CPU so much, so I'm at a dead end.
My System SpecsSystem Spec
11 Feb 2010   #15

Windows 7

Bump for any new info?
My System SpecsSystem Spec

 Downloading reduces performance

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