Memory leak in latest driver

tuath · 09-04-2013, 01:48 PM

Hello DisplayLink,

I have diagnosed a memory leak in the dlcdcncm6_x64.sys driver which causes my 8 gig of rams on my laptop to rapidly be allocated and then the system crashes.

I have attached the usual log files as well as a dump file from the wdk tool poolmon, which shows the tag "NBLP" to be allocating memory and never realeasing it. It seems to has side effects as not all of the pool is taken up by this driver.

tuath · 09-10-2013, 08:59 PM

Any news ?

JamesH · 09-11-2013, 12:22 PM

Hi,

I've raised this internally for investigation.

Thanks,
James

JamesH · 09-19-2013, 10:05 AM

Hi,

Can you let me know if this happens if the dock is connected to a USB 2.0 port?

Thanks,
James

tuath · 09-19-2013, 01:03 PM

Hi James,

I did a quick test over usb 2 and the problem still arrises. My Non-Paged pool was at 218 megs and after transferring a 700 meg file, it went up to 1.3 gigs. Besically, it`s like the buffers used to copy the data from the nework card to os are never released.

I am a software developer if i can assist with anything special.

Since i have declared the problem, i have upgraded to Windows 8.1 rtm and the problem tstill arises.

JamesH · 09-20-2013, 10:07 AM

Hi,

Thanks for the info.

Aside from the applications listed that the support tool captures (in the Installed_Programs.txt file) are there any other applications installed?

Do you have any filter drivers installed?
Can you provide details of any networking related software you have installed?

If possible can you provide the logs from your Windows 8.1 install as well?

Thanks,
James

09-10-2013, 08:59 PM	#2
tuath Junior Member Join Date: Sep 2013 Posts: 17	Follow-up Any news ?

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09-11-2013, 12:22 PM	#3
JamesH Senior Member Join Date: Jan 2012 Posts: 1,523	Hi, I've raised this internally for investigation. Thanks, James

09-19-2013, 10:05 AM	#4
JamesH Senior Member Join Date: Jan 2012 Posts: 1,523	Hi, Can you let me know if this happens if the dock is connected to a USB 2.0 port? Thanks, James

09-19-2013, 01:03 PM	#5
tuath Junior Member Join Date: Sep 2013 Posts: 17	Hi James, I did a quick test over usb 2 and the problem still arrises. My Non-Paged pool was at 218 megs and after transferring a 700 meg file, it went up to 1.3 gigs. Besically, it`s like the buffers used to copy the data from the nework card to os are never released. I am a software developer if i can assist with anything special. Since i have declared the problem, i have upgraded to Windows 8.1 rtm and the problem tstill arises.

09-20-2013, 10:07 AM	#6
JamesH Senior Member Join Date: Jan 2012 Posts: 1,523	Hi, Thanks for the info. Aside from the applications listed that the support tool captures (in the Installed_Programs.txt file) are there any other applications installed? Do you have any filter drivers installed? Can you provide details of any networking related software you have installed? If possible can you provide the logs from your Windows 8.1 install as well? Thanks, James