Network usage causes high DPC Latency

[cutcopypaste]

Well I guess it's not clear sailing yet.

Things are looking a little bit better I think but I'm still getting spikes of around 16000 regularly... exactly every 40 seconds actually. and one as high as 116034 (my previous spike was 540694)

latency mon says windows' tcp/ip driver is the culprit

 

[DarrylGittins]

Microsoft virus scanners apparently can contribute to the problem. If you are running Microsoft Security essentials or Forefront, try this:


1. Open Microsoft Security Essential or Forefront.
2. Click the Settings tab.
3. Click Excluded files and Locations
4. Click Add.
5. Select either of the following paths, depending on the scanner you are using:

c:\Program files\Microsoft security essentials\MsMpEng.exe
C:\Program Files\Microsoft Forefront\Forefront System\Client\AntiMalware\MsMpEng.exe

6. Click Ok.
7. Click Save changes.
8. Close the scanner program, and then restart the computer.

You might also try excluding other network intensive programs like iTunes.exe or iTuneHelper.exe.

For more on this, see the following:
http://social.answers.microsoft.com/Forums/en-US/msestart/thread/0519ba5e-f3d8-4caa-a193-01fea178aa4f

 

[cutcopypaste]

Thanks Darryl.. sounds like a good idea just in general!

Just a quick update on my end... I haven't had any autio glitching since I installed that last windows update. I have had some pretty large DPC spikes, but they haven't had any observable negative affects, so that is pretty cool!
I am pretty curious why this affected some of us so badly and others not at all

 

[binni]

I'm having this problem too, though I don't get as many red spikes. The spikes I get are perfectly synced with disruption in audio output which is horribly annoying. I've tried many of the suggestions in this thread and found that it seems to be my tcp/ip driver (according to LatencyMon's last report the highest execution time was around 15ms). Disabling the wireless network adapter (Intel WiFi Link 5100 AGN) gets rid of the spikes and audio disruption but keeping the WiFi disabled is not a viable option for me.

I wonder if this is something Intel could fix with a driver update (I have the most current drivers) or if it's more of a problem inherent to Windows 7 since this seems to be happening with other network adapters.

Anyways, replying and subscribing in hopes that a solution will pop up eventually.

 

[pankov]

Guys,
I've been struggling to find a solution for this high DPC Latency when I use WiFi for a very long time and almost accidentally after the last 12 hour round of fight I've done it.

The solution was as simple as changing a single option in the driver properties of my Intel Pro/Wireless 2915abg network adapter in Device manager.
In Advanced -> Power Management move the slider to "Highest" (which means no power saving and highest performance, not the other way around).
This changed the times from this

to this

The last one is not perfect but it's far better than before.

The laptop with this problem was an old Dell Latitude D410 with Windows XP SP3 but I hope this will help somebody else as I think that the problem is pretty general IMHO.

 

[TSK]

I signed up to say that I've found a service that is a possible culprit.
If you suffer from Latency spikes appearing in certain intervals disabling the Service "Network Location Awareness" might get rid of the latency spikes. This service is not required for accessing the internet.

I appologize if this has already been pointed out.

 

[Krisp PL]

I'm always getting red bars after power on/off or restart. But I've discovered everything comes instantly to normal (green bars) after putting computer to sleep and wakeing it up again. My comp is ASRock ION 330HT-BD desktop and about a year with Windows 7 Professional 32 there were no problems - they come suddently with windows update I suppose, because I didn't do anything myself in Windows config or software.

This fact comes me to a conclusion that there is some Windows 7 power management issue causing all this usb, ndis, audio etc. conflicts.

In the meantime, I'm only putting PC to sleep.

 

[Holy Moses]

I have been having issues with this for some time now, as previously posted in this thread.

The problem ONLY ever arises when using uTorrent, Vuze or similar P2P apps (at least on my end)

The other day, I was looking for a program to cycle reboots to handle the latency. I thought I could find a program to reboot my PC every 4 hours or so, and with the way I have it set up at login (none), it would just be a 40 second pause in data transfer, at every set interval.

Well, I ended up downloading a program called Shutdown Scheduler. I messed around with it for while, got some scheduling set up and it suited my needs.

Then I reset it to default.....meant to set it again but forgot about. Magically though, I have not touched my PC in a week now, no reboots and no latency.


This is the only program I have installed in my laptop in nearly two months or so, and Windows updates were recently shut off as I also suspected them as being a latency trigger.



Long story short, I installed Shutdown Scheduler, and that alone seems to have fixed the issue. Maybe it's the Smart Ram feature it uses, :huh: but I no longer suffer from latency at all.

Hopefully some REAL answers come forth one day though.

 

[Krisp PL]

For torrentz suff I bought dedicated PC for about 20USD (old IBM) which I operate through RDP. So, torrentz is not my problem

 

[Joningi]

Hi All!

I just registered to tell you guys what i did!
I've got an Acer Aspire TimelineX 5820T, with Realtek HD audio.
I've been having clicks and pops in my speakers for almost 9 months, since i bought the computer. I managed to solve it once, when I installed some new realtek drivers, think it was the 2.45 driver. But few weeks ago I decided to update to the newest 2.5X from the realtek website, and POOF, I got the clicks and pops again!

SO I read through this forum and finally, Holy Moses from pg. 4 came up with the solution for me!
I disabled the Atheros PCI-E Gigabit Ethernet Controller in device manager, and wolah. IT WORKS!!
Try it out!

 

[snadge]

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

 

[kraemersg]

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.

 

[lofagi]

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?

 

[damiansevren]

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

 

[Conditioned]

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

 

[snowman47]

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

 

[NetworkPro]

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/download/free_tools/DPC-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.

 

[db133]

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.

 

[FishnFurNubs]

Glad to see I am on windows 10 and this issue is still present. I have most of these fixes with no luck. I am going to try installing windows on a different ssd maybe and swapping out the CPU. If anyone has found out after all these year please share.
edit: using a 3.0 usb ethernet adapter helped a bit, but did not fix the issue.

 

[trefrog]

Just coming in to report that uninstalling Oracle VirtualBox fixed my problem. I didn't even have to reboot. Disabling the VirtualBox network adapters didn't work. It seems like it's injecting itself into the network stack, and having effects despite never running. I guess I'll just have to stick with VMware (which also has virtual network devices installed). I'm running uTorrent (on a drip right now) and running a GNU Wget script (which I did confirm was triggering the problem, then monitoring with DPC Latency Checker... and unlike earlier today, I haven't had a single red bar. mostly green...

and I spoke too soon. exactly as I type, I'm seeing a wave of red bars, and about 50/50 green vs yellow. Still, nothing like the mountains of constant red I was getting before. now it's smooth green across the board again.

Maybe there's something inherently wrong with how the Windows network stack interacts with certain chipsets/hardware/drivers. I have to assume that not everyone is having this problem.

So my advice? Look into some of the programs you're using. Anything that seems like it might inject itself into your network stack in some fashion? Antivirus/Firewall, virtual machines, hardware monitors... things that may need to operate on a lower level... things that need more than just "surface" network connectivity. A web browser is unlikely to be doing anything funny like this, but something like a VPN client, a packet sniffer or a DDoS bot (for example! tsk tsk) might be needing access to core network functions

Then again, maybe it's not even that complicated. Maybe the developers of certain software just haven't updated their code since they first cooked it up in the Windows XP days. VirtualBox is essentially proprietary abandonware scooped up by Oracle. I thought I'd give it an update before using it after a long break. There were no updates to be had.

for the record:
Windows 10 Pro 1703
motherboard: MSI P35 Platinum (MS-7345) {2007!}
CPU: Intel Core 2 Quad Q9450
GFX: GeForce GTX 750 Ti
RAM: 4x 2GB DDR2-400
chipsets: P35 & ICH9R
ethernet: Realtek PCIe GBE Family Controller (driver 10.10.714.2016)
USB bluetooth: Broadcom BCM20702
USB 3.0 card: Syba SY-PEX20140 (Etron chip) {piece of junk}