Memory leak when starting IMU

[oilst]

When starting the IMU with
_device.StartImu();
the memory consumption increases steadily. As soon as I stop the imu with
_device.StopImu();
the memory consumption does not increase anymore.

Expected behavior
Starting the Imu should not create a memory leak.

Desktop:

• OS with Version: Windows 1903
• SDK Version: 1.4.0
• Firmware version:
  RGB camera firmware: 1.6.98
  Depth camera firmware: 1.6.70
  Depth config file: 6109.7
  Audio firmware: 1.6.14

[qm13]

Could you please provide more precise repro steps? Is this C/C++ or C#?
Are you running one of the samples?
What tool are you using to monitor memory leakage?
Did you wait long enough for queue stabilization (wait beyond 15 seconds)?

[oilst]

Steps to reproduce:

• checkout https://github.com/microsoft/Azure-Kinect-Samples/tree/master/body-tracking-samples/csharp_3d_viewer
• add device.StartImu(); after line 26 in Program.cs
• run the program in VS 2019 and monitor the memory in VS. The memory increases over time (I tried for 10 minutes and it is still increasing)

[DirkKramer]

Same issue on my side

[Vangos]

The issue is also occurring in C# and Unity3D. You can reproduce it easily:

Unity3D

• Start any Kinect Unity application.
• Open the Profiler.
• Select Memory.
• Take a sample.

On some computers, ManagedHeap.UsedSize reaches 1 GB within a few seconds and keeps growing. Also, you'll notice that the Task Manager's memory consumption is increasing.

[kimjetam]

I discovered this issue too, with nuget package Microsoft.Azure.Kinect.Sensor 1.4.1. Are there going to be an update in the future @qm13 ?

[gregorijk]

This is still an open issue. I've just spent couple of hours trying to find a memory leak in my code and it turned out to be this bug related to the IMU. :(