MSE gradually increases DPC latency when there are high network activity

Hi!

 

When you use MS Security Essentials together with uTorrent or other application which produces a high network traffic the DPC latency increases dramatically after 3-4 hours of working. If you restart uTorrent or disable and then re-enable the MSE Realtime Protection the DPC latency drops back to minimal (normal) level.

Here are the screenshots (DPC Latency Checker from http://www.thesycon.de/ was used) :

1) The PC is restarted, MSE (with Realtime protection turned on) and uTorrent are loaded. The DPC Latency checker shows minimal DPC latency level: http://www.rugby-forum.ru/temp/morro1.jpg .

2) MSE and uTorrent were not restarted for 5-6 hours. Note the increased DPC Latency: http://www.rugby-forum.ru/temp/morro2.jpg .

3) The MSE Realtime protection was turned off and then back on. DPC latency drops back to minimal level: http://www.rugby-forum.ru/temp/morro3.jpg .

 

(Win7, latest MSE, Marvell Yukon 88E8055 PCI-E Gigabit Ethernet Controller with the latest Win7 drivers).

 

Last autumn I already reported this issue to the MSE developers during MSE beta program, but they marked this issue as 'not reproducible':

 

-----

Product/Technology - Microsoft Security Essentials Beta
Feedback ID – 473290
Feedback Title – DPC Latency increases dramatically when using MSE with uTorrent

The following fields or values changed:
Field Status changed from [Active] to [Resolved]
Field Resolution changed from [None] to [Not Reproducible]

-----

 

But the problem still persists, and there are many reports about this problem in Internet (for example: http://forum.utorrent.com/viewtopic.php?id=59644 ). Most of the users know nothing about DPC Latency, so they are reporting the issue as 'Music flickers/crackles when browsing the Internet','Sound output pops/crackles/hesitates', 'audio stops working after Windows 7 has been running for a while', 'Jerky sound playback Win7', 'Windows 7 Audio Stutter Problem' etc... This is because high DPC latency results in unstable audio playback.

 

Can we try to tackle this (rather important) issue down?

 

Thank you.

 

Question Info


Last updated June 27, 2019 Views 13,060 Applies to:
Answer
Answer
Done. Support case: 1130220707.

Did this solve your problem?

Sorry this didn't help.

Great! Thanks for marking this as the answer.

How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site.

How satisfied are you with this response?

Thanks for your feedback.