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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - vkCmdCopyQueryPoolResults(VK_QUERY_RESULT_WAIT_BIT) for timestamps with large query count hangs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108925#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - vkCmdCopyQueryPoolResults(VK_QUERY_RESULT_WAIT_BIT) for timestamps with large query count hangs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=108925">bug 108925</a>
from <span class="vcard"><a class="email" href="mailto:asmith@feralinteractive.com" title="Alex Smith <asmith@feralinteractive.com>"> <span class="fn">Alex Smith</span></a>
</span></b>
<pre>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?</pre>
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