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FastDeploy/custom_ops/metax_ops/fused_moe.cu
2025-11-03 17:44:27 +08:00

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// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
#include "fused_moe_op.h"
#include "helper.h"
#include "mc_fused_moe_helper.h"
__global__ void compute_total_rows_before_expert_kernel(
int* sorted_experts,
const int64_t sorted_experts_len,
const int64_t num_experts,
int32_t* total_rows_before_expert) {
const int expert = blockIdx.x * blockDim.x + threadIdx.x;
if (expert >= num_experts) return;
total_rows_before_expert[expert] =
find_total_elts_leq_target(sorted_experts, sorted_experts_len, expert);
}
void compute_total_rows_before_expert(int* sorted_indices,
const int64_t total_indices,
const int64_t num_experts,
int32_t* total_rows_before_expert,
cudaStream_t stream) {
const int threads = std::min(int64_t(1024), num_experts);
const int blocks = (num_experts + threads - 1) / threads;
compute_total_rows_before_expert_kernel<<<blocks, threads, 0, stream>>>(
sorted_indices, total_indices, num_experts, total_rows_before_expert);
}
template <paddle::DataType T,
typename ElementA,
typename ElementB,
typename ElementC>
void FusedMoeKernel(const paddle::Tensor& input,
const paddle::Tensor& gate_weight,
const paddle::Tensor& ffn1_weight,
const paddle::optional<paddle::Tensor>& ffn1_scale,
const paddle::optional<paddle::Tensor>& ffn1_bias,
const paddle::Tensor& ffn2_weight,
const paddle::optional<paddle::Tensor>& ffn2_scale,
const paddle::optional<paddle::Tensor>& ffn2_bias,
const std::string& quant_method,
const int moe_topk,
const bool group_moe,
const bool norm_topk_prob,
paddle::Tensor* output) {
typedef PDTraits<T> traits_;
typedef typename traits_::DataType DataType_;
typedef typename traits_::data_t data_t;
auto* output_data = output->data<data_t>();
auto moe_compute =
McMoeHelper<data_t, ElementA, ElementB, ElementC>(quant_method);
moe_compute.computeFFN(&input,
&gate_weight,
&ffn1_weight,
ffn1_scale ? ffn1_scale.get_ptr() : nullptr,
ffn1_bias ? ffn1_bias.get_ptr() : nullptr,
&ffn2_weight,
ffn2_scale ? ffn2_scale.get_ptr() : nullptr,
ffn2_bias ? ffn2_bias.get_ptr() : nullptr,
nullptr,
moe_topk,
group_moe,
norm_topk_prob,
1.0, // ComputeFFN
"ffn",
output);
}
std::vector<paddle::Tensor> FusedExpertMoe(
const paddle::Tensor& input,
const paddle::Tensor& gate_weight,
const paddle::Tensor& ffn1_weight,
const paddle::Tensor& ffn2_weight,
const paddle::optional<paddle::Tensor>& ffn1_bias,
const paddle::optional<paddle::Tensor>& ffn1_scale,
const paddle::optional<paddle::Tensor>& ffn2_bias,
const paddle::optional<paddle::Tensor>& ffn2_scale,
const std::string& quant_method,
const int moe_topk,
const bool norm_topk_prob,
const bool group_moe) {
const auto input_type = input.dtype();
auto output = paddle::empty_like(input);
if (output.dims()[0] == 0) {
return {output};
}
switch (input_type) {
case paddle::DataType::BFLOAT16:
FusedMoeKernel<paddle::DataType::BFLOAT16,
maca_bfloat16,
int8_t,
maca_bfloat16>(input,
gate_weight,
ffn1_weight,
ffn1_scale,
ffn1_bias,
ffn2_weight,
ffn2_scale,
ffn2_bias,
quant_method,
moe_topk,
group_moe,
norm_topk_prob,
&output);
break;
// case paddle::DataType::FLOAT16:
// FusedMoeKernel<paddle::DataType::FLOAT16>(input,
// gate_weight,
// ffn1_weight,
// ffn1_scale,
// ffn1_bias,
// ffn2_weight,
// ffn2_scale,
// ffn2_bias,
// quant_method,
// moe_topk,
// group_moe,
// norm_topk_prob,
// &output);
// break;
default:
PD_THROW("Only support bf16 for FusedMoeKernel");
}
return {output};
}
std::vector<std::vector<int64_t>> FusedExpertMoeInferShape(
const std::vector<int64_t>& input_shape,
const std::vector<int64_t>& gate_weight_shape,
const std::vector<int64_t>& ffn1_weight_shape,
const std::vector<int64_t>& ffn2_weight_shape,
const paddle::optional<std::vector<int64_t>>& ffn1_bias_shape,
const paddle::optional<std::vector<int64_t>>& ffn1_scale_shape,
const paddle::optional<std::vector<int64_t>>& ffn2_bias_shape,
const paddle::optional<std::vector<int64_t>>& ffn2_scale_shape) {
return {input_shape};
}
std::vector<paddle::DataType> FusedExpertMoeInferDtype(
const paddle::DataType& input_dtype,
const paddle::DataType& gate_weight_dtype,
const paddle::DataType& ffn1_weight_dtype,
const paddle::DataType& ffn2_weight_dtype,
const paddle::optional<paddle::DataType>& ffn1_bias_dtype,
const paddle::optional<paddle::DataType>& ffn1_scale_dtype,
const paddle::optional<paddle::DataType>& ffn2_bias_dtype,
const paddle::optional<paddle::DataType>& ffn2_scale_dtype) {
return {input_dtype};
}
PD_BUILD_OP(fused_expert_moe)
.Inputs({"input",
"gate_weight",
"ffn1_weight",
"ffn2_weight",
paddle::Optional("ffn1_bias"),
paddle::Optional("ffn1_scale"),
paddle::Optional("ffn2_bias"),
paddle::Optional("ffn2_scale")})
.Outputs({"output"})
.Attrs({"quant_method:std::string",
"moe_topk:int",
"norm_topk_prob:bool",
"group_moe:bool"})
.SetKernelFn(PD_KERNEL(FusedExpertMoe))
.SetInferShapeFn(PD_INFER_SHAPE(FusedExpertMoeInferShape))
.SetInferDtypeFn(PD_INFER_DTYPE(FusedExpertMoeInferDtype));