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[dxvk] Disable sparse zero buffer on pre-RDNA AMD hardware

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Philip Rebohle 2025-03-13 23:15:54 +01:00 committed by Philip Rebohle
parent ad253b8a7e
commit 29f33f04ab
1 changed files with 8 additions and 2 deletions
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10
src/dxvk/dxvk_context.cpp
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@ -7671,10 +7671,16 @@ namespace dxvk {
bufInfo.debugName = "Zero buffer"; bufInfo.debugName = "Zero buffer";
// If supported by the device, create a large sparse buffer and keep it unmapped // If supported by the device, create a large sparse buffer and keep it unmapped
// in order to avoid having to allocate and clear any actual memory // in order to avoid having to allocate and clear any actual memory. Some specific
// older AMD hardware seems to have some trouble with this, use the minimum subgroup
// size to disable the sparse path on anything that predates RDNA1.
bool noSparseWorkaroundAmd = m_device->properties().core.properties.vendorID == uint32_t(DxvkGpuVendor::Amd)
&& m_device->properties().vk13.minSubgroupSize == 64u;
if (m_device->features().core.features.sparseBinding if (m_device->features().core.features.sparseBinding
&& m_device->features().core.features.sparseResidencyBuffer && m_device->features().core.features.sparseResidencyBuffer
&& m_device->properties().core.properties.sparseProperties.residencyNonResidentStrict) { && m_device->properties().core.properties.sparseProperties.residencyNonResidentStrict
&& !noSparseWorkaroundAmd) {
bufInfo.size = align<VkDeviceSize>(size, DxvkMemoryPool::MaxChunkSize); bufInfo.size = align<VkDeviceSize>(size, DxvkMemoryPool::MaxChunkSize);
bufInfo.flags |= VK_BUFFER_CREATE_SPARSE_BINDING_BIT | VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT; bufInfo.flags |= VK_BUFFER_CREATE_SPARSE_BINDING_BIT | VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT;
} }