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[VK] VMA changes
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This commit is contained in:
wildcard 2025-08-26 22:12:33 +02:00
parent 44d658bbc5
commit e95b908318
1 changed files with 25 additions and 4 deletions
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29
src/video_core/vulkan_common/vulkan_memory_allocator.cpp
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@ -291,10 +291,16 @@ MemoryCommit MemoryAllocator::Commit(const VkMemoryRequirements& requirements, M
return std::move(*commit);
}
// Commit has failed, allocate more memory.
const u64 chunk_size = AllocationChunkSize(requirements.size);
u64 chunk_size = AllocationChunkSize(requirements.size);
if (!TryAllocMemory(flags, type_mask, chunk_size)) {
// TODO(Rodrigo): Handle out of memory situations in some way like flushing to guest memory.
throw vk::Exception(VK_ERROR_OUT_OF_DEVICE_MEMORY);
const u64 floor = std::max<u64>(requirements.size, 4ull << 20);
while (chunk_size > floor && !TryAllocMemory(flags, type_mask, (chunk_size >>= 1))) {
// keep halving until we can make progress
}
if (chunk_size <= floor && !TryAllocMemory(flags, type_mask, floor)) {
// TODO(Rodrigo): Handle out of memory situations in some way like flushing to guest memory.
throw vk::Exception(VK_ERROR_OUT_OF_DEVICE_MEMORY);
}
}
// Commit again, this time it won't fail since there's a fresh allocation above.
// If it does, there's a bug.
@ -331,11 +337,26 @@ void MemoryAllocator::ReleaseMemory(MemoryAllocation* alloc) {
std::optional<MemoryCommit> MemoryAllocator::TryCommit(const VkMemoryRequirements& requirements,
VkMemoryPropertyFlags flags) {
//conservative, spec-compliant alignment for suballocation
VkDeviceSize eff_align = requirements.alignment;
const auto& limits = device.GetPhysical().GetProperties().limits;
if ((flags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) &&
!(flags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT)) {
// Non-coherent memory must be invalidated on atom boundary
if (limits.nonCoherentAtomSize > eff_align) eff_align = limits.nonCoherentAtomSize;
}
// Separate buffers to avoid stalls on tilers
if (buffer_image_granularity > eff_align)
{
eff_align = buffer_image_granularity;
}
eff_align = std::bit_ceil(eff_align);
for (auto& allocation : allocations) {
if (!allocation->IsCompatible(flags, requirements.memoryTypeBits)) {
continue;
}
if (auto commit = allocation->Commit(requirements.size, requirements.alignment)) {
if (auto commit = allocation->Commit(requirements.size, eff_align)) {
return commit;
}
}