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<th>Bug ID</th>
<td><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">108925</a>
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<th>Summary</th>
<td>vkCmdCopyQueryPoolResults(VK_QUERY_RESULT_WAIT_BIT) for timestamps with large query count hangs
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<th>Product</th>
<td>Mesa
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>major
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/Vulkan/radeon
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
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<th>Reporter</th>
<td>asmith@feralinteractive.com
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=142700" name="attach_142700" title="Test case">attachment 142700</a> <a href="attachment.cgi?id=142700&action=edit" title="Test case">[details]</a></span>
Test case
According to the Vulkan spec we need VK_QUERY_RESULT_WAIT_BIT here to ensure
that all previous query commands have written a result. Using that on RADV with
a large query count causes a GPU hang.
Attached a test case which reproduces this. Hangs for me on a Vega 64, with
latest git master and 18.3 branch. Doesn't hang if the query count is reduced
(in my testing, 512 queries hangs but 256 doesn't), or if
VK_QUERY_RESULT_WAIT_BIT is not used.</pre>
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