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[dxbc] Disable subgroup early discard on Nvidia GPUs

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People report performance regressions up to 5% with it enabled.
This commit is contained in:
Philip Rebohle 2018-11-23 12:28:48 +01:00
parent 6dd82dfe03
commit 3e686098cc
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GPG Key ID: C8CC613427A31C99
1 changed files with 6 additions and 0 deletions
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6
src/dxbc/dxbc_options.cpp
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@ -21,6 +21,12 @@ namespace dxvk {
&& (devInfo.coreSubgroup.supportedOperations & VK_SUBGROUP_FEATURE_ARITHMETIC_BIT); && (devInfo.coreSubgroup.supportedOperations & VK_SUBGROUP_FEATURE_ARITHMETIC_BIT);
useSubgroupOpsClustered = useSubgroupOpsForEarlyDiscard useSubgroupOpsClustered = useSubgroupOpsForEarlyDiscard
&& (devInfo.coreSubgroup.supportedOperations & VK_SUBGROUP_FEATURE_CLUSTERED_BIT); && (devInfo.coreSubgroup.supportedOperations & VK_SUBGROUP_FEATURE_CLUSTERED_BIT);
// Disable early discard on Nvidia because it may hurt performance
if (DxvkGpuVendor(devInfo.core.properties.vendorID) == DxvkGpuVendor::Nvidia) {
useSubgroupOpsForEarlyDiscard = false;
useSubgroupOpsClustered = false;
}
} }
} }