On 15/06/2024 13:35, Marek Olšák wrote:
It's probably driver-specific. Some drivers might need glFlush before you use gbm_bo_map because gbm might only wait for work that has been flushed.
That would be needed on the "writing" side, right? So if I'm seeing issues when mapping for reading, then it would indicate a bug in the other peer? Which would be gnome-shell in my case.
Any way I could test this? Can I force extra syncs/flushes in some way and see if the issue goes away?
I tried adding a sleep of 10ms before reading the data, but did not see any improvement. Which would make sense if the commands are still sitting in an application buffer somewhere, rather than with the GPU.
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