// d3d12umddi.h

typedef enum D3D12DDI_MEMORY_POOL {
  D3D12DDI_MEMORY_POOL_L0 = 0,
  D3D12DDI_MEMORY_POOL_L1 = 1
} ;
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Windows Driver Kit DDI reference (ne-d3d12umddi-d3d12ddi_memory_pool)

Description

A D3D12DDI_MEMORY_POOL value specifies the memory pool for the heap.

Constants

`D3D12DDI_MEMORY_POOL_L0:0`

The memory pool is L0, which is the physical system memory pool. When the adapter is discrete/NUMA, this pool has greater bandwidth for the CPU and less bandwidth for the GPU. When the adapter is UMA, this pool is the only one that is valid.

`D3D12DDI_MEMORY_POOL_L1:1`

The memory pool is L1, which is typically known as the physical (local) video memory pool. L1 is only available when the adapter is discrete/NUMA, and has greater bandwidth for the GPU and cannot even be accessed by the CPU. When the adapter is UMA, this pool is not available.

D3D12DDI_MEMORY_POOL - NtDoc