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Manager: prefer compute-only queue family, set queue priority to 0.0f #462

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Manager: prefer compute-only queue family, set queue priority to 0.0f #462

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18 changes: 8 additions & 10 deletions src/Manager.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -380,16 +380,14 @@ Manager::createDevice(const std::vector<uint32_t>& familyQueueIndices,

uint32_t computeQueueFamilyIndex = 0;
bool computeQueueSupported = false;
// Pick the first compute-capable family, preferring one without
// graphics so long dispatches don't stall the desktop on iGPUs.
for (uint32_t i = 0; i < allQueueFamilyProperties.size(); i++) {
vk::QueueFamilyProperties queueFamilyProperties =
allQueueFamilyProperties[i];

if (queueFamilyProperties.queueFlags &
vk::QueueFlagBits::eCompute) {
computeQueueFamilyIndex = i;
computeQueueSupported = true;
break;
}
auto flags = allQueueFamilyProperties[i].queueFlags;
if (!(flags & vk::QueueFlagBits::eCompute)) continue;
computeQueueFamilyIndex = i;
computeQueueSupported = true;
if (!(flags & vk::QueueFlagBits::eGraphics)) break;
}

if (!computeQueueSupported) {
Expand Down Expand Up @@ -421,7 +419,7 @@ Manager::createDevice(const std::vector<uint32_t>& familyQueueIndices,
std::unordered_map<uint32_t, std::vector<float>> familyQueuePriorities;
for (const auto& value : this->mComputeQueueFamilyIndices) {
familyQueueCounts[value]++;
familyQueuePriorities[value].push_back(1.0f);
familyQueuePriorities[value].push_back(0.0f);
}

std::unordered_map<uint32_t, uint32_t> familyQueueIndexCount;
Expand Down