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mesa/docs
Danylo Piliaiev 44bdac9849 tu: Implement VK_AMD_buffer_marker to support Graphics Flight Recorder
Graphics Flight Recorder is:
 "The Graphics Flight Recorder (GFR) is a Vulkan layer to help
  trackdown and identify the cause of GPU hangs and crashes.
  It works by instrumenting command buffers with completion tags."

This is a nice little tool which could help quickly identify the call
which hanged. Or if command buffer is executed for too long.

The tiling nature of our GPU shouldn't be a big issue aside from
lower performance.

For non-segfault case, if:
- Hang happens at the same place in cmdbuf and draw/dispatch is not
  finished at that point - it is likely that there is an infinite
  loop in some of the shaders in this draw.
- Hang happens always in different place - likely there is nothing
  wrong and command buffer just takes too long to execute and you
  should try increasing hangcheck_period_ms. If it doesn't help
  it is likely a synchronization issue.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13553>
2022-02-07 12:53:34 +02:00
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