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Check FenceCycle signalled flag immediately before waiting

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The lock release within the wait for submission means that another thread could end up signalling the cycle and then the VK wait still happen after when the lock has been reacquired.
This commit is contained in:
Billy Laws 2022-10-22 13:25:51 +01:00
parent 1a23b929a7
commit 95d849e1f6
1 changed files with 4 additions and 3 deletions
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7
app/src/main/cpp/skyline/gpu/fence_cycle.h
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@ -132,14 +132,15 @@ namespace skyline::gpu {
});
std::unique_lock lock{mutex};
submitCondition.wait(lock, [&] { return submitted; });
if (signalled.test(std::memory_order_relaxed)) {
if (shouldDestroy)
DestroyDependencies();
return;
}
submitCondition.wait(lock, [&] { return submitted; });
vk::Result waitResult;
while ((waitResult = (*device).waitForFences(1, &fence, false, std::numeric_limits<u64>::max(), *device.getDispatcher())) != vk::Result::eSuccess) {
if (waitResult == vk::Result::eTimeout)
@ -227,7 +228,7 @@ namespace skyline::gpu {
* @param cycle The cycle to chain to this one, this is nullable and this function will be a no-op if this is nullptr
*/
void ChainCycle(const std::shared_ptr<FenceCycle> &cycle) {
if (cycle && !signalled.test(std::memory_order_consume) && cycle.get() != this)
if (cycle && !signalled.test(std::memory_order_consume) && cycle.get() != this && !cycle->Poll())
chainedCycles.Append(cycle); // If the cycle isn't the current cycle or already signalled, we need to chain it
}