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FastDeploy/custom_ops/gpu_ops/seqs2seqs.cu
2025-06-09 19:20:15 +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.
#include "paddle/extension.h"
#ifndef PD_BUILD_STATIC_OP
#define PD_BUILD_STATIC_OP(name) PD_BUILD_OP(static_op_##name)
#endif
__global__ void GetSeqMapping(int* merged_seq_lens_this_time,
int* merged_seq_lens_encoder,
int* merged_seq_lens_decoder,
int* new_system_lens,
int* new_seq_lens_this_time,
int* new_seq_lens_encoder,
int* new_seq_lens_decoder,
int* seq_mapping,
int* dec_group_num,
const int* seq_lens_this_time,
const int* seq_lens_encoder,
const int* seq_lens_decoder,
const int* group_ids,
const int* group_lens,
const int* cum_group_lens,
const int* system_lens,
const int max_bsz) {
const int bi = blockIdx.x;
const int ti = threadIdx.x;
const int group_len = group_lens[bi];
if (group_len <= 0) return;
const int start_bi = bi == 0 ? 0 : cum_group_lens[bi - 1];
if (ti == 0) {
const int* group_ids_now = group_ids + bi * max_bsz;
int seq_len_sum = 0;
int seq_len_encoder_sum = 0;
int dec_count = 0;
int system_len = 0;
for (int i = 0; i < group_len; i++) {
const int group_id = group_ids_now[i];
const int seq_len_this_time = seq_lens_this_time[group_id];
const int seq_len_encoder = seq_lens_encoder[group_id];
if (seq_len_encoder <= 0) { // decoder
seq_len_sum += seq_len_this_time;
seq_len_encoder_sum += seq_len_encoder;
new_seq_lens_this_time[start_bi + dec_count] =
seq_len_this_time;
new_seq_lens_encoder[start_bi + dec_count] = seq_len_encoder;
new_seq_lens_decoder[start_bi + dec_count] =
seq_lens_decoder[group_id];
seq_mapping[start_bi + dec_count] = group_id;
system_len = system_lens[group_id];
new_system_lens[group_id] = system_len;
dec_count++;
} else { // encoder
int encoder_bid = atomicAdd(dec_group_num, 1);
new_seq_lens_this_time[encoder_bid] = seq_len_this_time;
new_seq_lens_encoder[encoder_bid] = seq_len_encoder;
new_seq_lens_decoder[encoder_bid] = seq_lens_decoder[group_id];
seq_mapping[encoder_bid] = group_id;
new_system_lens[group_id] = 0;
}
}
if (dec_count >= 1) {
merged_seq_lens_this_time[bi] = seq_len_sum;
merged_seq_lens_encoder[bi] = seq_len_encoder_sum;
if (dec_count == 1) {
merged_seq_lens_decoder[bi] = 0;
} else {
merged_seq_lens_decoder[bi] = system_len;
}
}
if (dec_count <= 1) {
for (int i = 0; i < group_len; i++) {
const int group_id = group_ids_now[i];
new_system_lens[group_id] = 0;
}
}
}
}
std::vector<paddle::Tensor> Seqs2Seqs(const paddle::Tensor& seq_lens_this_time,
const paddle::Tensor& seq_lens_encoder,
const paddle::Tensor& seq_lens_decoder,
const paddle::Tensor& group_ids,
const paddle::Tensor& group_lens,
const paddle::Tensor& dec_group_num,
const paddle::Tensor& cum_group_lens,
const paddle::Tensor& system_lens) {
auto cu_stream = seq_lens_this_time.stream();
const int bsz = seq_lens_this_time.shape()[0];
const int max_bsz = seq_lens_encoder.shape()[0];
auto merged_seq_lens_this_time = paddle::full(
{bsz, 1}, 0, paddle::DataType::INT32, seq_lens_this_time.place());
auto merged_seq_lens_encoder = paddle::full(
{bsz, 1}, 0, paddle::DataType::INT32, seq_lens_this_time.place());
auto merged_seq_lens_decoder = paddle::full(
{bsz, 1}, 0, paddle::DataType::INT32, seq_lens_this_time.place());
auto new_system_lens = paddle::full(
{bsz, 1}, 0, paddle::DataType::INT32, seq_lens_this_time.place());
auto new_seq_lens_this_time = paddle::full(
{bsz, 1}, 0, paddle::DataType::INT32, seq_lens_this_time.place());
auto new_seq_lens_encoder = paddle::full(
{bsz, 1}, 0, paddle::DataType::INT32, seq_lens_this_time.place());
auto new_seq_lens_decoder = paddle::full(
{bsz, 1}, 0, paddle::DataType::INT32, seq_lens_this_time.place());
auto seq_mapping = paddle::full(
{bsz, 1}, -1, paddle::DataType::INT32, seq_lens_this_time.place());
constexpr int BlockSize = 32;
// const int blockSize = (max_bsz + 32 - 1) / 32 * 32;
GetSeqMapping<<<bsz, BlockSize, 0, cu_stream>>>(
merged_seq_lens_this_time.data<int>(),
merged_seq_lens_encoder.data<int>(),
merged_seq_lens_decoder.data<int>(),
new_system_lens.data<int>(),
new_seq_lens_this_time.data<int>(),
new_seq_lens_encoder.data<int>(),
new_seq_lens_decoder.data<int>(),
seq_mapping.data<int>(),
const_cast<int*>(dec_group_num.data<int>()),
seq_lens_this_time.data<int>(),
seq_lens_encoder.data<int>(),
seq_lens_decoder.data<int>(),
group_ids.data<int>(),
group_lens.data<int>(),
cum_group_lens.data<int>(),
system_lens.data<int>(),
max_bsz);
return {merged_seq_lens_this_time,
merged_seq_lens_encoder,
merged_seq_lens_decoder,
new_system_lens,
new_seq_lens_this_time,
new_seq_lens_encoder,
new_seq_lens_decoder,
seq_mapping}; // , enc_token_num, dec_token_num};
}
std::vector<std::vector<int64_t>> Seqs2SeqsInferShape(
const std::vector<int64_t>& seq_lens_this_time_shape,
const std::vector<int64_t>& seq_lens_encoder_shape,
const std::vector<int64_t>& seq_lens_decoder_shape,
const std::vector<int64_t>& group_ids_shape,
const std::vector<int64_t>& group_lens_shape,
const std::vector<int64_t>& dec_group_num_shape,
const std::vector<int64_t>& cum_group_lens_shape,
const std::vector<int64_t>& system_lens_shape) {
int64_t bsz = seq_lens_this_time_shape[0];
return {{bsz, 1},
{bsz, 1},
{bsz, 1},
{bsz, 1},
{bsz, 1},
{bsz, 1},
{bsz, 1},
{bsz, 1}};
}
std::vector<paddle::DataType> Seqs2SeqsInferDtype(
const paddle::DataType& seq_lens_this_time_dtype,
const paddle::DataType& seq_lens_encoder_dtype,
const paddle::DataType& seq_lens_decoder_dtype,
const paddle::DataType& group_ids_dtype,
const paddle::DataType& group_lens_dtype,
const paddle::DataType& dec_group_num_dtype,
const paddle::DataType& cum_group_lens_dtype,
const paddle::DataType& system_lens_dtype) {
return {seq_lens_this_time_dtype,
seq_lens_this_time_dtype,
seq_lens_this_time_dtype,
seq_lens_this_time_dtype,
seq_lens_this_time_dtype,
seq_lens_this_time_dtype,
seq_lens_this_time_dtype,
seq_lens_this_time_dtype};
}
PD_BUILD_STATIC_OP(seqs2seqs)
.Inputs({"seq_lens_this_time",
"seq_lens_encoder",
"seq_lens_decoder",
"group_ids",
"group_lens",
"dec_group_num",
"cum_group_lens",
"system_lens"})
.Outputs({"merged_seq_lens_this_time",
"merged_seq_lens_encoder",
"merged_seq_lens_decoder",
"new_system_lens",
"new_seq_lens_this_time",
"new_seq_lens_encoder",
"new_seq_lens_decoder",
"seq_mapping"})
.SetKernelFn(PD_KERNEL(Seqs2Seqs))
.SetInferShapeFn(PD_INFER_SHAPE(Seqs2SeqsInferShape))
.SetInferDtypeFn(PD_INFER_DTYPE(Seqs2SeqsInferDtype));