chore: import upstream snapshot with attribution
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wehub-resource-sync
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# pylint: disable=invalid-name
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"""GEMM kernel generator and profiler for CUTLASS."""
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import os
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import pickle
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from functools import partial
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from .gemm_operation import EmitGemmInstance, GemmOperation
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from .gemm_profiler import GemmProfilerEmitter
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from .gen_tensor_op import EPILOGUE_MAP, GENERATOR_FUNC_TABLE, ProfilerEngine
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from .library import (
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DataType,
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DataTypeTag,
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EpilogueFunctor,
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LayoutType,
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SwizzlingFunctor,
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TensorDescription,
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)
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def create_gemm_operator_with_epilogue(
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op_type,
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tile_description,
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data_type,
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alignment,
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swizzling_functor,
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batched=False,
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layout_b=LayoutType.ColumnMajor,
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):
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"""
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Instantiate a cutlass kernel from the given configuration,
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along with the epilouge functor
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"""
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element_a, element_b, element_c, element_epilogue = data_type
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A = TensorDescription(element_a, LayoutType.RowMajor, alignment)
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B = TensorDescription(element_b, layout_b, alignment)
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C = TensorDescription(element_c, LayoutType.RowMajor, alignment)
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if batched:
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swizzling_functor = SwizzlingFunctor.Batched
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if "residual" in op_type:
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if "hardswish" in op_type:
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activation = "cutlass::epilogue::thread::HardSwish"
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elif "silu" in op_type:
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activation = "cutlass::epilogue::thread::SiLu"
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elif "sigmoid" in op_type:
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activation = "cutlass::epilogue::thread::Sigmoid"
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elif "gelu" in op_type:
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activation = "cutlass::epilogue::thread::GELU"
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elif "relu" in op_type:
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activation = "cutlass::epilogue::thread::ReLu"
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else:
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activation = "cutlass::epilogue::thread::Identity"
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binary_op = "cutlass::multiplies" if "residual_multiply" in op_type else "cutlass::plus"
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unary_op = (
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"cutlass::epilogue::thread::ReLu"
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if op_type.endswith("relu")
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else "cutlass::epilogue::thread::Identity"
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)
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residual_block_info = {
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"activation": activation,
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"binary_op": binary_op,
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"unary_op": unary_op,
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}
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epilogue = EpilogueFunctor.LinearCombinationResidualBlock
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no_beta_scaling = False
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else:
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residual_block_info = None
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epilogue, no_beta_scaling = EPILOGUE_MAP[op_type]
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op = GemmOperation(
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tile_description.minimum_compute_capability,
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tile_description,
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A,
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B,
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C,
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element_epilogue,
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epilogue,
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swizzling_functor,
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)
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return (
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op.procedural_name(),
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EmitGemmInstance().emit(
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op,
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no_beta_scaling=no_beta_scaling,
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batched=batched,
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residual_block_info=residual_block_info,
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),
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)
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def enumerate_gemm_operators(
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tile_descriptions,
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data_type,
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alignment_constraints,
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swizzling_functor=SwizzlingFunctor.Identity8,
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layout_b=LayoutType.ColumnMajor,
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):
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"""Exhaustively instantiate all kernels from a given configuration."""
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ret = []
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kernel_emitter = EmitGemmInstance()
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profiler_emitter = GemmProfilerEmitter()
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element_a, element_b, element_c, element_epilogue = data_type
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for tile_description in tile_descriptions:
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for alignment in alignment_constraints:
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A = TensorDescription(element_a, LayoutType.RowMajor, alignment)
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B = TensorDescription(element_b, layout_b, alignment)
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C = TensorDescription(element_c, LayoutType.RowMajor, alignment)
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if element_c == DataType.s32 and A.alignment == 1:
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tile_description.threadblock_shape[0] = min(
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tile_description.threadblock_shape[0], 128
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)
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tile_description.threadblock_shape[1] = min(
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tile_description.threadblock_shape[1], 128
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)
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op = GemmOperation(
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tile_description.minimum_compute_capability,
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tile_description,
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A,
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B,
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C,
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element_epilogue,
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EpilogueFunctor.LinearCombination,
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swizzling_functor,
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)
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src = profiler_emitter.emit(
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op.procedural_name(),
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kernel_emitter.emit(op, batched=False),
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DataTypeTag[element_a],
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DataTypeTag[element_b],
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DataTypeTag[element_c],
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op.leading_dim(),
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)
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ret.append(
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{
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"src": src,
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"op": op,
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"name": op.procedural_name(),
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"tile_description": tile_description,
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"alignment": alignment,
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"data_type": data_type,
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"swizzle_functor": swizzling_functor,
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}
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)
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return ret
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# TODO(masahi): A sensible way to pick reasonable default kernels
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DEFAULT_KERNELS = {
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75: {
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("float16", "float16"): "cutlass_tensorop_h1688gemm_128x64_32x2_tn_align1",
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("float16", "float32"): "cutlass_tensorop_s1688gemm_f16_64x64_32x2_tn_align1",
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},
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# align1 variants do not seem to be available for sm80
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80: {
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("float16", "float16"): "cutlass_tensorop_h1688gemm_128x64_32x2_tn_align1",
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("float16", "float32"): "cutlass_tensorop_s1688gemm_f16_64x64_32x2_tn_align1",
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# two kernels for tf32 and 3xtf32
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("float32", "float32"): (
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"cutlass_tensorop_s1688gemm_128x64_32x3_tn_align1",
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"cutlass_tensorop_s1688gemm_64x64_16x3_tn_align1",
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),
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},
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}
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class CutlassGemmProfiler:
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"""Profile all candidate kernels and select the best one."""
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def __init__(self, sm, cutlass_path, binary_path):
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assert sm in GENERATOR_FUNC_TABLE and sm in DEFAULT_KERNELS, f"sm{sm} not supported yet."
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self.engine = ProfilerEngine(sm, cutlass_path, binary_path)
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self.sm = sm
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self.cache_path = os.path.join(binary_path, "cutlass_gemm_cache.pickle")
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if os.path.exists(self.cache_path):
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self.cache = pickle.load(open(self.cache_path, "rb"))
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else:
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self.cache = {}
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def get_default(
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self,
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op_type,
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out_dtype,
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arg0_dtype,
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arg1_dtype,
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use_3xtf32=True,
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batched=False,
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layout_b=LayoutType.ColumnMajor,
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):
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"""Return the default kernel for the requested architecture.
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For now, the default kernel was picked arbitrary.
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"""
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ops = GENERATOR_FUNC_TABLE[self.sm](
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out_dtype,
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arg0_dtype,
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arg1_dtype,
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partial(enumerate_gemm_operators, layout_b=layout_b),
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lambda align: align == 1, # Only request align1 kernels
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use_3xtf32,
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profile_all_alignments=True, # To include all align1 kernels
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# TODO(masahi): Invesitigate when fp32 accumulation is needed for gemm
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accumlator_dtype=out_dtype,
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)
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default_kernel_name = DEFAULT_KERNELS[self.sm][(arg0_dtype, out_dtype)]
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if arg0_dtype == "float32":
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default_kernel_name = (
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default_kernel_name[0] if not use_3xtf32 else default_kernel_name[1]
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)
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filtered = list(filter(lambda op: op["name"] == default_kernel_name, ops))
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assert len(filtered) == 1
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op = filtered[0]
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name, opdef = create_gemm_operator_with_epilogue(
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op_type,
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op["tile_description"],
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op["data_type"],
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op["alignment"],
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op["swizzle_functor"],
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batched=batched,
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layout_b=layout_b,
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)
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op.update({"name": name, "opdef": opdef})
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return op
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def select_op(
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self,
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M,
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N,
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K,
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out_dtype,
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arg0_dtype,
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arg1_dtype,
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use_3xtf32,
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profile_all_alignments=False,
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find_first_valid=False,
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use_multiprocessing=False,
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layout_b=LayoutType.ColumnMajor,
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):
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"""
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Profile and select the best kernel from candidate kernels.
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See the documentation for the profile method below.
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"""
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if (M, N, K) in self.cache:
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op = self.cache[(M, N, K)]
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return op
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# TODO(masahi): CUTLASS alignment check on gemm kernels is too restrictive.
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# See https://github.com/NVIDIA/cutlass/issues/362.
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# When the above issue is resolved, we can remove the alignment check on M below.
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ops = GENERATOR_FUNC_TABLE[self.sm](
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out_dtype,
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arg0_dtype,
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arg1_dtype,
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partial(enumerate_gemm_operators, layout_b=layout_b),
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lambda align: all([dim % align == 0 for dim in [M, N, K]]),
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use_3xtf32,
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profile_all_alignments=profile_all_alignments,
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# TODO(masahi): Invesitigate when fp32 accumulation is needed for gemm
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accumlator_dtype=out_dtype,
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)
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if not find_first_valid:
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self.engine.compile_all(ops, use_multiprocessing)
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for op in ops:
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out = self.engine.evaluate(op, [M, N, K])
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op["runtime"] = out
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if out < float("inf") and find_first_valid:
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self.cache[(M, N, K)] = op
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return op
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op = min(ops, key=lambda i: i["runtime"])
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self.cache[(M, N, K)] = op
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with open(self.cache_path, "wb") as f:
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pickle.dump(self.cache, f)
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return op
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def profile(
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self,
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op_type,
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M,
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N,
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K,
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out_dtype,
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arg0_dtype,
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arg1_dtype,
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use_3xtf32=True,
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profile_all_alignments=False,
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find_first_valid=False,
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use_multiprocessing=False,
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batched=False,
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layout_b=LayoutType.ColumnMajor,
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):
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"""Profile and select the best kernel from candidate kernels.
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If find_first_valid is True, return immediately after the first applicable kernel is found.
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If use_multiprocessing is True, compile all profiler executables in parallel.
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"""
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op = self.select_op(
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M,
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N,
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K,
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out_dtype,
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arg0_dtype,
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arg1_dtype,
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use_3xtf32,
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profile_all_alignments=profile_all_alignments,
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find_first_valid=find_first_valid,
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use_multiprocessing=use_multiprocessing,
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layout_b=layout_b,
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)
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name, opdef = create_gemm_operator_with_epilogue(
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op_type,
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op["tile_description"],
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op["data_type"],
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op["alignment"],
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op["swizzle_functor"],
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batched=batched,
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layout_b=layout_b,
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)
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return name, opdef, op["runtime"]
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