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Mojo struct

Conv2dSmem

struct Conv2dSmem[act_type: DType, filter_type: DType, out_type: DType, *, config: Conv2dConfig[act_type, filter_type, out_type]]

Shared memory layout for SM100 Conv2D fprop kernel.

This struct manages shared memory allocation for:

  • Activation tiles (after im2col transformation)
  • Filter tiles
  • Output tiles for accumulation
  • Synchronization barriers

The layout mirrors B200MatmulSmem but with conv-specific semantics:

  • A tiles = im2col'd activation (M x K where M = NHW, K = CRS)
  • B tiles = filter (transposed, K x N where K = CRS, N = K_out)
  • C tiles = output (M x N)

Parameters​

Fields​

  • ​input_tiles (Conv2dSmem[act_type, filter_type, out_type, config=config].InputTiles):
  • ​output_tiles (Conv2dSmem[act_type, filter_type, out_type, config=config].OutputTiles):
  • ​source_tiles (Conv2dSmem[act_type, filter_type, out_type, config=config].SourceTiles):
  • ​pipelines (Conv2dSmem[act_type, filter_type, out_type, config=config].Pipelines):
  • ​epi_load_pipeline (Conv2dSmem[act_type, filter_type, out_type, config=config].EpiLoadPipeline):
  • ​load_order_barrier (Conv2dSmem[act_type, filter_type, out_type, config=config].LoadOrderBarrier):

Implemented traits​

AnyType, Deinitable, Movable

comptime members​

act_smem_elements​

comptime act_smem_elements = Layout[*(), *()].static_product

ActTileArray​

comptime ActTileArray = Conv2dSmem[act_type, filter_type, out_type, config=config].InputTiles.ATileArray

BK​

comptime BK = config.block_tile_shape[Int(2)]

BM​

comptime BM = config.block_tile_shape[Int(0)]

BN​

comptime BN = config.block_tile_shape[Int(1)]

EpiLoadBarriers​

comptime EpiLoadBarriers = Conv2dSmem[act_type, filter_type, out_type, config=config].EpiLoadPipeline.BarrierArray

EpiLoadPipeline​

comptime EpiLoadPipeline = EpiLoadPipelineStorage[(config.mma_shape[Int(1)] // config.output_tile_shape[Int(1)])]

filter_smem_elements​

comptime filter_smem_elements = Layout[*(), *()].static_product

FilterTileArray​

comptime FilterTileArray = Conv2dSmem[act_type, filter_type, out_type, config=config].InputTiles.BTileArray

InputTiles​

comptime InputTiles = StandardTileStorage[act_type, filter_type, IndexList(config.block_tile_shape[Int(0)], config.block_tile_shape[Int(2)], __list_literal__=NoneType(None)), IndexList(config.block_tile_shape[Int(1)], config.block_tile_shape[Int(2)], __list_literal__=NoneType(None)), config.num_pipeline_stages]

LoadOrderBarrier​

comptime LoadOrderBarrier = LoadOrderBarrierStorage

LoadOrderBarriers​

comptime LoadOrderBarriers = Conv2dSmem[act_type, filter_type, out_type, config=config].LoadOrderBarrier.BarrierArray

num_accum_pipeline_stages​

comptime num_accum_pipeline_stages = config.num_accum_pipeline_stages

num_clc_pipeline_stages​

comptime num_clc_pipeline_stages = config.num_clc_pipeline_stages

num_epi_load_stages​

comptime num_epi_load_stages = (config.mma_shape[Int(1)] // config.output_tile_shape[Int(1)])

num_group_pipeline_stages​

comptime num_group_pipeline_stages = (config // config)

num_output_stages​

comptime num_output_stages = config.num_output_stages

num_pipeline_stages​

comptime num_pipeline_stages = config.num_pipeline_stages

out_smem_layout​

comptime out_smem_layout = Layout.row_major(config.output_tile_shape[Int(0)], config.output_tile_shape[Int(1)])

OutputM​

comptime OutputM = config.output_tile_shape[Int(0)]

OutputN​

comptime OutputN = config.output_tile_shape[Int(1)]

OutputTiles​

comptime OutputTiles = OutputTileStorage[out_type, config.output_tile_shape[Int(0)], config.output_tile_shape[Int(1)], config.num_output_stages]

OutTileArray​

comptime OutTileArray = Conv2dSmem[act_type, filter_type, out_type, config=config].OutputTiles.CTileArray

Pipelines​

comptime Pipelines = SmemPipelineBundle[(config // config), config.num_accum_pipeline_stages, config.num_clc_pipeline_stages, StandardTilePayload[act_type, filter_type, IndexList(config.block_tile_shape[Int(0)], config.block_tile_shape[Int(2)], __list_literal__=NoneType(None)), IndexList(config.block_tile_shape[Int(1)], config.block_tile_shape[Int(2)], __list_literal__=NoneType(None)), config.num_pipeline_stages]]

SourceTiles​

comptime SourceTiles = SourceTileStorage[out_type, IndexList(config.output_tile_shape[Int(0)], config.output_tile_shape[Int(1)], __list_literal__=NoneType(None)), (config.mma_shape[Int(1)] // config.output_tile_shape[Int(1)])]

SrcTileArray​

comptime SrcTileArray = Conv2dSmem[act_type, filter_type, out_type, config=config].SourceTiles.SrcTileArray

Methods​

act_tiles​

def act_tiles(ref[AddressSpace._value] self) -> Self.ActTileArray

Get activation tiles (im2col'd).

Returns:

Self.ActTileArray

filter_tiles​

def filter_tiles(ref[AddressSpace._value] self) -> Self.FilterTileArray

Get filter tiles.

Returns:

Self.FilterTileArray

out_tiles​

def out_tiles(ref[AddressSpace._value] self) -> Self.OutTileArray

Get output tiles.

Returns:

Self.OutTileArray

src_tiles​

def src_tiles(ref[AddressSpace._value] self) -> Self.SrcTileArray

Get source C tiles (for residual operations).

Returns:

Self.SrcTileArray

epi_load_barriers​

def epi_load_barriers(ref[AddressSpace._value] self) -> Self.EpiLoadBarriers

Get epilogue load pipeline barriers.

Used for synchronization between EpilogueLoad warp (producer) and Epilogue warps (consumers) for source C tensor loading.

Returns:

Self.EpiLoadBarriers

get_load_order_barrier​

def get_load_order_barrier(ref[AddressSpace._value] self) -> Self.LoadOrderBarriers

Get load order barrier.

Used to coordinate MainLoad warp with EpilogueLoad warp, ensuring epilogue loads don't start before mainloop prologue completes.

Returns:

Self.LoadOrderBarriers

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