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Resource Management 7: Device memory sub-allocation using buddy allocator.

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Uses a large buddy system to allocate binary sized heaps on-demand.

BUG=dawn:27

Change-Id: I72e425c23e601da6ee53827423bef7ff13be049c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10880
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Bryan Bernhart <bryan.bernhart@intel.com>
This commit is contained in:
Bryan Bernhart
2019-10-03 18:17:31 +00:00
committed by Commit Bot service account
parent 277d2e15d5
commit 21dfc91954
12 changed files with 597 additions and 32 deletions
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19
src/dawn_native/ResourceMemoryAllocation.h
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@@ -35,25 +35,36 @@ namespace dawn_native {
kInvalid
};
// Metadata that describes how the allocation was allocated.
struct AllocationInfo {
// AllocationInfo contains a separate offset to not confuse block vs memory offsets.
// The block offset is within the entire allocator memory range and only required by the
// buddy sub-allocator to get the corresponding memory. Unlike the block offset, the
// allocation offset is always local to the memory.
uint64_t mBlockOffset = 0;
AllocationMethod mMethod = AllocationMethod::kInvalid;
};
// Handle into a resource heap pool.
class ResourceMemoryAllocation {
public:
ResourceMemoryAllocation();
ResourceMemoryAllocation(uint64_t offset,
ResourceMemoryAllocation(const AllocationInfo& info,
uint64_t offset,
ResourceHeapBase* resourceHeap,
AllocationMethod method,
uint8_t* mappedPointer = nullptr);
~ResourceMemoryAllocation() = default;
ResourceHeapBase* GetResourceHeap() const;
uint64_t GetOffset() const;
AllocationMethod GetAllocationMethod() const;
uint8_t* GetMappedPointer() const;
AllocationInfo GetInfo() const;
void Invalidate();
private:
AllocationMethod mMethod;
AllocationInfo mInfo;
uint64_t mOffset;
ResourceHeapBase* mResourceHeap;
uint8_t* mMappedPointer;