topic Re: Potential Memory Leak in User Mode Driver for Intel Graphics Technology when using OpenGL in Graphics

Potential Memory Leak in User Mode Driver for Intel Graphics Technology when using OpenGL

ALind15 — Fri, 18 Oct 2019 16:36:53 GMT

We are facing a memory leak when using .net Application (.net 4.6.1 C# Windows Forms with OpenTK GLControl) with Intel HD graphics (inside igdgmm32.dll). Our capabilities are limited, can you help further analyzing?

Preconditions

Intel HD Graphics

verified with:
Intel UHD 630 (Driver: 26.20.100.6911), Windows 10 => igdgmm32.dll
Intel HD 530 (Driver: 21.20.16.4542), Windows 7 => ig9icd32.dll
Intel HD 620 (Driver: 26.20.100.6888), Windows 10 => igdgmm32.dll

Create Windows Form
Add GLControl (make sure property "Dock" is set to "DockStyle.Fill"
Shrink or grow GLControl on every frame

Note: when removing the dock-style setting, the leak does not occure.

Note: this is not representing the actual usage, this is just to make this issue occur more likely.

Screenshot of growing memory consumption in igdgmm32.dll

Related information

Operating system

Windows 10 (OS build 17134.1006)

NuGet:

OpenTK 3.1.0
OpenTK GLControl 3.1.0

What runtime (.NET Framework, CoreCLR, Mono)

.net Framework 4.6.1

Re: Potential Memory Leak in User Mode Driver for Intel Graphics Technology when using OpenGL

ALind15 — Fri, 18 Oct 2019 16:50:23 GMT

Below you find a Redgate ANTS Memory Profiler Result ("MemleakTest_ProfilerResults_101819.zip") and a CSharp Test Project ("MemleakTest.zip").

After starting the Test Project, the GLControl (UserControl as a Container for OpenGL Drawings) will start switching back and forth the Back and Front Buffer. By pressing the "s" key, a thread is started to Grow and Shrink this UserControl leading to the described MemoryLeak.

Please let me know if you need any further details or want me to re-transmit the files if outdated before investigating.

Thanks in advance!

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Re: Potential Memory Leak in User Mode Driver for Intel Graphics Technology when using OpenGL

Leonardo_C_Intel — Sat, 19 Oct 2019 05:03:49 GMT

Hello ALind15

Thank you for posting in the Intel Community.

In order to understand more about this behavior please confirm the following details:

What application is having this behavior?

Are you developing this application?

Regards,

Leonardo C.

Intel Customer Support Technician

A Contingent Worker at Intel

Re: Potential Memory Leak in User Mode Driver for Intel Graphics Technology when using OpenGL

ALind15 — Mon, 21 Oct 2019 15:47:28 GMT

Hi Leornardo,

thanks for your answer.

The application is written in C# (.net 4.6.1). In that application, I use OpenTK as a wrapper for OpenGL (https://github.com/opentk/opentk).

I sent the same request to their board as well in order to isolate the faulty behavior.

I wrote a sample project that shows the described behavior. You can find it attached to my previous comment (MemleakTest.zip).

I hope that helps,

Best regards,

André

Re: Potential Memory Leak in User Mode Driver for Intel Graphics Technology when using OpenGL

Leonardo_C_Intel — Tue, 22 Oct 2019 00:24:18 GMT

Hello ALind15

After reviewing the details on the behavior that you are having I am noticing that you are writing/developing the application, I would recommend referring to our Intel® developer zone (https://software.intel.com/en-us/home) for more detail assistance on this issue.

Regards,

Leonardo C.

Intel Customer Support Technician

A Contingent Worker at Intel

Re: Potential Memory Leak in User Mode Driver for Intel Graphics Technology when using OpenGL

ALind15 — Tue, 22 Oct 2019 15:42:48 GMT

I reopened this request on the developer board. Thanks for you assistance.