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Reorder active descriptor set slots to end of list

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Speeds up allocations by significantly reducing the number of needed atomic ops per alloc. Could be optimised further in the future if needed.
This commit is contained in:
Billy Laws 2022-09-23 22:06:50 +01:00
parent 128b68d8b2
commit f3184cdff1
1 changed files with 7 additions and 3 deletions
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10
app/src/main/cpp/skyline/gpu/descriptor_allocator.cpp
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@ -94,9 +94,13 @@ namespace skyline::gpu {
vk::Result lastResult{};
if (it != pool->layoutSlots.end()) {
auto &slots{it->second};
for (auto &slot : it->second)
if (!slot.active.test_and_set(std::memory_order_acq_rel))
return ActiveDescriptorSet{pool, &slot};
for (auto slotIt{it->second.begin()} ; slotIt != it->second.end() ; slotIt++) {
if (!slotIt->active.test_and_set(std::memory_order_acq_rel)) {
// Move active slots to end of list to reduce search time
it->second.splice(it->second.end(), it->second, slotIt);
return ActiveDescriptorSet{pool, &*slotIt};
}
}
// If we couldn't find an available slot, we need to allocate a new one
auto set{AllocateVkDescriptorSet(layout)};