Crippling CPU usage when downloading

Thanny

My machine has a Threadripper 2950X 16-core processor with 64GB of RAM.  Before yesterday, I never had any issues downloading large amounts of data.  Starting yesterday, however, any attempt at downloading data causes the System process to use 100% of the CPU on two threads, with roughly half of that being interrupts.  This causes the entire machine to lag, and even makes it nearly impossible to use the mouse.

The only device driver that made it high on the list when sorted by CPU usage in Process Explorer was that of Bitdefender.

I'd like to be able to just disable protection temporarily to verify that Bitdefender is the problem, but the program inexplicably has no such functionality.  So while my machine was lagging on a 6GB download at just 2MB/sec (my connection goes up to 40MB/sec), I uninstalled Bitdefender.  That solved the problem completely.  The download no longer pegged the System process on two threads, the machine was entirely responsive, and the download speed even increased.

So how do I report this bug properly, and be notified when it's fixed, so I know when it's safe to re-install the program?  Right now, Bitdefender is completely unusable.

 

 

xgman

I've also been experiencing this. I actually remember this being a problem a couple of years ago in an earlier version of Bitdefender and the solution was to turn off the "Block port scans in the network" option. That does not help this time though so I'm not sure if the bug popped up again somewhere else or what but if not fixed soon I probably have to uninstall Bitdefender.

 

edit: I actually found the original thread from a few years back about the issue if it helps someone report this problem better:

/index.php?/topic/68902-fixed-network-traffic-causes-bitdefender-to-use-excessive-cpu/&do=embed" style="height:385px;max-width:500px;">

 

Stefan I.

Hi /index.php?/profile/216080-thanny/&do=hovercard" data-mentionid="216080" href="<___base_url___>/index.php?/profile/216080-thanny/" id="ips_uid_6984_5" rel="">@Thanny /index.php?/profile/200594-xgman/&do=hovercard" data-mentionid="200594" href="<___base_url___>/index.php?/profile/200594-xgman/" rel="">@xgman,

Please try to toggle off each of the following one at a time and let me know if there are any changes:

- open Bitdefender and click on Protection from the side-menu

- click the blue slider next to Firewall

- click on Settings under the Online Threat Prevention column -> toggle off everything one at a time

xgman

I've tried turning off the blue slider next to Firewall as well as toggling everything off under Online Threat Prevention. Still having lag.

Roxana G

4 hours ago, xgman said:

I've tried turning off the blue slider next to Firewall as well as toggling everything off under Online Threat Prevention. Still having lag.

Hi,

Please write us at bitsy@bitdefender.com and our team will gladly help you in identifying the issue.