High dpc latency

[Elect0]

Hello LTT community,

It's been an ongoing problem of high dpc latency(random lag spikes/crackling sound) which seems to be a cause of windows 10 and NIC conflict.

This problem occurred immediately after upgrading to windows 10( never happened on windows 7). During upgrade no hardware changes were made. I ran test on program  "LatencyMon" which identified "ndis.sys" driver causing high dpc latency http://imgur.com/oKp3Nnw. After a long time of troubleshooting i found out that lag spikes occur only when p2p client(utorrent, bittorrent) is running. I tried many solutions: fresh windows install, different p2p clients, bought new network adapter(TP-Link TG-3468) with no success. Any help is greatly appreciated.

Hardware:

Asrock Z77 Pro4-M

Intel i5-3470

+ TP-Link TG-3468

[Mojo-Jojo]

That's a ridiculously high execution time. You say you have tried a different network card, the TP-Link TG-3468.

Did you try finding the drivers for the direct chipset, rather than from TP-Link?

Also, do you have a firewall installed? They usually hook into NIDS.sys, and rather inefficiently at that.

 

[Elect0]

• Did you try finding the drivers for the direct chipset, rather than from TP-Link?

No it's been only a day i have new network card. Once realtek.com comes back online i'll test and get back with the results.

• Also, do you have a firewall installed? They usually hook into NIDS.sys, and rather inefficiently at that.

Default windows firewall + windows defender.

[Mojo-Jojo]

2 minutes ago, Elect0 said:

• Did you try finding the drivers for the direct chipset, rather than from TP-Link?

No it's been only a day i have new network card. Once realtek.com comes back online i'll test and get back with the results.

• Also, do you have a firewall installed? They usually hook into NIDS.sys, and rather inefficiently at that.

Default windows firewall + windows defender.

Sounds good. I found the realtek page but they're indeed down. 

You'd think Realtek would have their site in order but they've always been slow or down over the past years.

Let me know how it goes!

[TDP_Equinox]

DPC Latency sucks. 
First off, try reinstalling drivers. See if there are any drivers for the NIC specific to windows 10. 
Is your system overclocked? I found that windows 10 has DPC issues if the system is overclocked using the bclock instead of the multiplier. Best to disable and OC's for now. 

You can try a fresh install of windows ten, or just go back to 7.

[Elect0]

On 2/10/2016 at 5:31 PM, Mojo-Jojo said:

Sounds good. I found the realtek page but they're indeed down. 

You'd think Realtek would have their site in order but they've always been slow or down over the past years.

Let me know how it goes!

Drivers from realtek website had no effect.

19 hours ago, TDP_Equinox said:

DPC Latency sucks. 
First off, try reinstalling drivers. See if there are any drivers for the NIC specific to windows 10. 
Is your system overclocked? I found that windows 10 has DPC issues if the system is overclocked using the bclock instead of the multiplier. Best to disable and OC's for now. 

You can try a fresh install of windows ten, or just go back to 7.

I reinstalled drivers and tried different versions and did the same with new network card. Yes latest official drivers support windows 10 but doesn't solve the problem.

I tried disabling OC's and that didn't have any effect.

I tried fresh install of windows 10 which ended with same results. Yes downgrading to windows 7 eliminates the problem but that's not the solution i'm looking for.

[TDP_Equinox]

3 hours ago, Elect0 said:

Drivers from realtek website had no effect.

I reinstalled drivers and tried different versions and did the same with new network card. Yes latest official drivers support windows 10 but doesn't solve the problem.

I tried disabling OC's and that didn't have any effect.

I tried fresh install of windows 10 which ended with same results. Yes downgrading to windows 7 eliminates the problem but that's not the solution i'm looking for.

If a fresh install of windows 10 yields the same result with all the latest drivers, chances are there isn't really a solution at the moment. 
I'd go back to 7 for now and try upgrading again in a few months. It seems like this issue is in the hands of the manufacturer now. 

[kasinjsh]

I have the same problem and nothing helps that I have tried. (I have ga-ma770t-ud3p mb bdw) I'm using Focusrites Scarlett 2i2 audio interface and I have DPC latency problems. My DPC spikes are around ~120ms hi far as I have quickly debugged whit LatencyMon. My first problem was manufacturers drivers. They have it posted it only in troubleshoot section and beta site driver is a disaster on all OS versions. That special AMD fix driver solves just half of crackle,stutter problems, the ones that Latencymon didn't reported. My problem is NIC. I have read on internet and tried a lot of solutions, but there is no fix for it. I tested integrated NIC, old PCI NIC, usb wifi dongle - all of them produces this spike (ndis.sys driver if I remember correctly). After I disable all NICs problem is gone of course. I don't even have to torture NIC whit torrents or downloads, it just happens at least once every hour. A lot of people that reported this have minimized sudden spikes, but are not eliminated them. I use My audio interface for music production, so You understand that latency and fluent audio stream is needed. The only fix is to roll back to Win7 or Win8.1. This issue started after some insider build before "RTM" and is not fixed till now. I believe the fault is how new kernel is processing DPC tasks. M$ idea was to reduce latency and they have succeeded in most cases far as I know, but others like Me/Us have big problems whit no way to fix them. I think that only M$ can fix this, no hardware manufacturer.

I'm back to Win7 and will test interface on Win10 when I compile a new PC on skylake base.

[nkerrocking]

On 2/10/2016 at 12:07 PM, Elect0 said:

Hello LTT community,

It's been an ongoing problem of high dpc latency(random lag spikes/crackling sound) which seems to be a cause of windows 10 and NIC conflict.

This problem occurred immediately after upgrading to windows 10( never happened on windows 7). During upgrade no hardware changes were made. I ran test on program  "LatencyMon" which identified "ndis.sys" driver causing high dpc latency http://imgur.com/oKp3Nnw. After a long time of troubleshooting i found out that lag spikes occur only when p2p client(utorrent, bittorrent) is running. I tried many solutions: fresh windows install, different p2p clients, bought new network adapter(TP-Link TG-3468) with no success. Any help is greatly appreciated.

Hardware:

Asrock Z77 Pro4-M

Intel i5-3470

+ TP-Link TG-3468

Electo i've had similar problem. Here's what fixed my problem:

 

Enable NIC interrupt moderation

 

 

Set NIC interrupt moderation rate to Extreme

 

 

Enable Receive Segment Coalescing Run powershell as administrator the following command

Set-NetOffloadGlobalSetting -ReceiveSegmentCoalescing Enabled