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Windows 7: Network usage causes high DPC Latency


05 May 2011   #71
snadge

Windows 7 Pro x64
 
 
Atheros AR5005 + Win7 = High DPC

Ive had this problem for years...never fixed it - i get 25% DPC Usage when I download on uTorrent OR web browser OR transfer files in or out of the laptop - its all to do with networking and ndis.sys driver - the fault lies with Microsoft, while I get 25% CPU usage it does not really affect my computer usage, although I dont play music or movies - it does dpike DPC CHECKER but not as much as ive seen some users on here, soon as I stop uTorrent or Download off web page it stops.. i installed XP SP2 on dualboot and the problem went away for me..

specs:
Acer 5051 Laptop
2Gb (2x1) 667Mhz RAM
1.8Ghz Dual-Core 1Mb L2-Cache
ATi Radeon X1100
120Gb 7200rpm drive
Atheros AR5005 54Mbps
Netgear DG834GT

I definitely think its windows 7 has a bug in the TCP Stack
I


My System SpecsSystem Spec
07 Jun 2012   #72
kraemersg

Windows 7 64-bit
 
 
Push: Found a solution on my machine

Lantency caused unacceptable audio dropouts on my machine. The pointers towards Intel were good.

This was one definite cause on my machine: The service

"intel desktop boards fsc application service".

If I disable this service, the dropouts are virtually gone!

The crackling noise I put down to heat (the system is very quiet at low fan speeds),
changing audio to CD quality helped here.

Hope this helps some.
My System SpecsSystem Spec
10 Jun 2012   #73
lofagi

Windows 7 Ultimate x64
 
 

Hello guys,

(first of all sry for my English) i have the same problem here, high latency, when im using the internet. Until i'm using my comp offline there isn't problems, after i connect n try to download something, or turn on the uTorrent, spikes are comming. I tried almost everyting, new windows, new drivers, (Bios, chipset, lan...), i got a new lancard also. When installed it first time, it goes very well, but after a restart spikes appear again.

I downloaded that LatencyMon, and it says the problem is whit raspppoe.sys ! But i dont know what to do whit it, i tried to replace it, but it is protected and i cant change that.





This is really annoying now...

What should i do?
My System SpecsSystem Spec
21 Jul 2012   #74
damiansevren

windows 7 64-bit
 
 

So... has anyone found a legit fix for this? Cause my high latency spikes are network related too.

However heres my problem:

I ran latencymon and narrowed my problem down to ndis.sys which I knew was my ethernet card. However when I disabled my LAN card and used wifi instead then latency mon showed that USBPORT.sys started causing high latency spikes.

Disabled my wifi card and used my LAN card. Then I was back to getting high latency from ndis.sys and some TCP driver.

So basically no matter what I do, if I want to use the internet im going to get latency problems :l

Anyone know how to fix this? Im getting really fed up... Im starting to regret buying windows 7
My System SpecsSystem Spec
22 Jul 2012   #75
Conditioned

Tomatoe
 
 

Sorry if this has been mentioned but after 3 pages I realized I dont want to read through more.

Please help, post your DPCLAT latency test results!

is a good guide for finding out which driver causes dpc latency problems. You can also check out a utility called latencymon.

Also I would try another intel inf driver. I can recommend 9.2.0.1031 and 9301021.

Please take care to do this:

http://imgur.com/izd69


My System SpecsSystem Spec
31 Jul 2012   #76
snowman47

Windows 7 Ultimate x64
 
 

Hi,
I've had similar problems like you guys.

The difference was that I experienced the problems during audio playback only when my ethernet cable was NOT plugged in!




After many things I tried, this helped:
  1. In Device Manager click View / Show hidden devices
  2. Under the Network adapters I could see a similar device ending with "VirtualBox Bridged Networking Driver Miniport" for every network device.
  3. I disabled all of them (ending with VirtualBox Bridged Networking Driver Miniport) and guess what This was THE ONLY thing that helped in my case (and I tried every suggestion on here).
  4. I also had "VirtualBox Host-Only Ethernet Adapter" disabled, but I'm not sure if this one needs to be disabled.
The down-side of this solution is that after leaving those devices disabled, when I plugged in the ethernet cable, I couldn't access internet. I tripple checked, if I have the legit network adapter enabled and it was. I also ran the windows troubleshooter, it didn't help.

So definitive solution - uninstalling VirtualBox. I needed it but clear sound without wired connection is what I need more...

I hope this will help to someone as well
My System SpecsSystem Spec
12 Sep 2012   #77
NetworkPro

XP SP3 32bit, Vista SP2 RC Business 32bit, 7 Beta 1
 
 

Holy f. I have this problem as IRQ interrupts in Windows 8. Will f. with the config when I get home and let you guys know the result.

Never noticed this f. s. with Windows 7 though. f.

P.S. http://www.smithsonmartin.com/downlo...C-Enhancer.zip this f. piece of s. did not help either. f.

P.S. 2 netstat -nt this shows InHost instead of Offloaded so this may be the problem now.

The Interrupts appear when there is network traffic.
My System SpecsSystem Spec
08 Dec 2013   #78
db133

Windows 7 64 bt Home Premium
 
 

I am running Windows 7 (64 bt).

I tracked the NDIS.SYS 6.20 Driver problem down to:

Atheros AR938X Wireless Network Adaptor.

If I disable it via Device Manager no more crackles and dropouts ! I am trying to find the correct advanced setting for the Atheros but as yet without success. I have spent hours looking and not a mention anywhere.

If anyone has the correct advance settings for the Atheros AR938X Wireless Network Adaptor please let me know.

Kind regards.
My System SpecsSystem Spec
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 Network usage causes high DPC Latency




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