Problem summary
GPU utilisation remains high when the cursor is outside the Canvas and 'Pause Canvas Rendering' is enabled
This issue appears to be affected by Vsync - It does not occur when Vsync is switched on.
Customer reported version
Mari 4.8v2
Customer reported platform
Windows 10
Steps to reproduce
1) Set a MARI_VSYNC=0 environment variable
2) Launch Mari and open an Example Material Design Project
3) Open Preferences and ensure that GPU > Canvas > Pause Canvas Rendering checkbox is ticked
On Windows:
4) Open Windows Task Manager and add a GPU column to the Processes overview (right-click column headers and tick GPU)
5) Inspect Mari's GPU usage while moving the cursor in and out of the Canvas
On Linux (NVidia GPUs only):
4) Open a terminal and run the following command:
nvidia-smi -l 1
5) Inspect the GPU usage percentage under 'GPU-Util' in the nvidia-smi terminal output while moving the cursor in and out of the Canvas in Mari
Expected behaviour
Mari's GPU usage should drop closer to 0% when the cursor is not over the Canvas:
4.7v7 - Cursor on Canvas:
4.7v7 - Cursor outside Canvas:
Actual behaviour
The GPU usage remains high compared to Mari 4.7:
4.8v2 - Cursor on Canvas:
4.8v2 - Cursor outside Canvas:
Workaround
Unknown.
Reproduced by support
This bug has been reproduced in:
Mari 5.0v2 - Windows 10 - CentOS 7.9
Mari 4.8v2 - Windows 10
Mari 4.8v1 - Windows 10 - CentOS 7.9 - regression
Unable to reproduce bug in:
Mari 4.7v7 - Windows 10 - CentOS 7.9
Earliest version tested
Mari 4.7v7 - This issue doesn't appear in this version and has regressed
