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Improve buffer zero-initialization in resolveQuerySet on Vulkan 

Simplify the buffer clear logic, and tolerate clear twice when resolving
unavailable queries if the destination buffer is not initialized and not
fully written.

Bug: dawn:973

Change-Id: Iaaf16acfd789787cb2f3eb18cd324c60d5f720b1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/59680
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Hao Li <hao.x.li@intel.com>
This commit is contained in:
Li Hao 2021-07-27 01:22:29 +00:00 committed by Dawn LUCI CQ
parent 3b6af4ff53
commit 6e5b080547
1 changed files with 7 additions and 11 deletions
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18
src/dawn_native/vulkan/CommandBufferVk.cpp
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@ -732,27 +732,23 @@ namespace dawn_native { namespace vulkan {
QuerySet* querySet = ToBackend(cmd->querySet.Get());
Buffer* destination = ToBackend(cmd->destination.Get());
destination->EnsureDataInitializedAsDestination(
recordingContext, cmd->destinationOffset,
cmd->queryCount * sizeof(uint64_t));
// vkCmdCopyQueryPoolResults only can retrieve available queries because
// VK_QUERY_RESULT_WAIT_BIT is set, for these unavailable queries, we need to
// clear the resolving region of the buffer to 0s if the buffer has been
// initialized or fully used.
// VK_QUERY_RESULT_WAIT_BIT is set. In order to resolve the unavailable queries
// as 0s, we need to clear the resolving region of the destination buffer to 0s.
auto startIt = querySet->GetQueryAvailability().begin() + cmd->firstQuery;
auto endIt = querySet->GetQueryAvailability().begin() + cmd->firstQuery +
cmd->queryCount;
bool hasUnavailableQueries = std::find(startIt, endIt, false) != endIt;
if (hasUnavailableQueries &&
(destination->IsDataInitialized() ||
destination->IsFullBufferRange(cmd->destinationOffset,
cmd->queryCount * sizeof(uint64_t)))) {
if (hasUnavailableQueries) {
destination->TransitionUsageNow(recordingContext,
wgpu::BufferUsage::CopyDst);
device->fn.CmdFillBuffer(commands, destination->GetHandle(),
cmd->destinationOffset,
cmd->queryCount * sizeof(uint64_t), 0u);
} else {
destination->EnsureDataInitializedAsDestination(
recordingContext, cmd->destinationOffset,
cmd->queryCount * sizeof(uint64_t));
}
destination->TransitionUsageNow(recordingContext,