[Mesa-dev] [Bug 108925] vkCmdCopyQueryPoolResults(VK_QUERY_RESULT_WAIT_BIT) for timestamps with large query count hangs

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Dec 3 13:38:00 UTC 2018


https://bugs.freedesktop.org/show_bug.cgi?id=108925

--- Comment #1 from Alex Smith <asmith at feralinteractive.com> ---
FWIW, doesn't occur on AMDVLK. As far as I can see, that is just using a
barrier rather than waiting for each individual query value to be available.

Also, it looks like RADV is only waiting on the low 32 bits of the query value.
Couldn't you get very unlucky and get a valid timestamp with the low 32 bits as
0xffffffff, which would hang?

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