wehub-resource-sync
139 lines
4.8 KiB
C++
139 lines
4.8 KiB
C++
// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "paddle/phi/kernels/c_concat_kernel.h"
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#include "paddle/phi/api/backward/backward_api.h"
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#include "paddle/phi/api/include/api.h"
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#include "paddle/phi/backends/all_context.h"
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#include "paddle/phi/backends/device_manager.h"
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#include "paddle/phi/core/distributed/collective/process_group.h"
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#include "paddle/phi/core/distributed/comm_context_manager.h"
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#include "paddle/phi/core/distributed/xccl_comm_context.h"
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#include "paddle/phi/core/kernel_registry.h"
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#include "paddle/phi/core/tensor_utils.h"
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#ifdef PADDLE_WITH_CUSTOM_DEVICE
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namespace phi {
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template <typename T, typename Context>
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void CConcatKernel(const Context& dev_ctx,
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const DenseTensor& x_in,
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int rank,
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int nranks,
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int ring_id UNUSED,
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bool use_calc_stream,
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bool use_model_parallel UNUSED,
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DenseTensor* out) {
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auto x = &x_in;
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int rid = ring_id;
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auto place = dev_ctx.GetPlace();
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PADDLE_ENFORCE_GE(rank,
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0,
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common::errors::PreconditionNotMet(
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"The value of rank (%d) for c_concat must be "
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"greater than or equal to 0.",
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rank));
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PADDLE_ENFORCE_GE(nranks,
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2,
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common::errors::PreconditionNotMet(
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"The value of nranks (%d) for c_concat must be "
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"greater than or equal to 2.",
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nranks));
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PADDLE_ENFORCE_LT(rank,
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nranks,
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common::errors::PreconditionNotMet(
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"The value of rank (%d) for c_concat must be "
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"less than that of nranks (%d).",
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rank,
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nranks));
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DenseTensor temp_out;
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DDim temp_out_dims = x->dims();
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temp_out_dims[0] *= nranks;
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temp_out.Resize(temp_out_dims);
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dev_ctx.template Alloc<T>(&temp_out);
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auto map = distributed::ProcessGroupMapFromGid::getInstance();
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if (map->has(rid)) {
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// Use ProcessGroup
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distributed::ProcessGroup* pg = map->get(rid);
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std::vector<DenseTensor> in_tensor;
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std::vector<DenseTensor> out_tensor;
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in_tensor.push_back(*x);
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out_tensor.push_back(temp_out);
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auto task = pg->AllGather(in_tensor, out_tensor, use_calc_stream, false);
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task->Wait();
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} else {
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auto comm = reinterpret_cast<phi::distributed::XCCLCommContext*>(
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phi::distributed::CommContextManager::GetInstance().Get(
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std::to_string(rid)));
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PADDLE_ENFORCE_EQ(
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nranks,
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comm->GetSize(),
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common::errors::InvalidArgument(
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"nranks: %s should equal to %s", nranks, comm->GetSize()));
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int64_t send_numel = x->numel();
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const T* send_buff = x->data<T>();
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T* recv_buff = temp_out.data<T>();
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std::shared_ptr<phi::stream::Stream> stream;
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if (use_calc_stream) {
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stream = dev_ctx.GetStream();
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} else {
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stream = comm->GetStream();
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}
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phi::DeviceManager::CCLAllGather(
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place.GetDeviceType(),
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reinterpret_cast<void*>(const_cast<T*>(send_buff)),
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recv_buff,
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send_numel,
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x->dtype(),
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comm->GetXcclComm(),
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stream->raw_stream());
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}
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std::vector<DenseTensor> inputs;
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int axis = x->dims().size() - 1;
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auto out_dims = x->dims();
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out_dims[out_dims.size() - 1] *= nranks;
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int rows_per_tensor = x->dims()[0];
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int offset = 0;
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for (int i = 0; i < nranks; i++) {
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DenseTensor temp = temp_out.Slice(offset, offset + rows_per_tensor);
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inputs.emplace_back(temp);
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offset += rows_per_tensor;
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}
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out->Resize(out_dims);
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std::vector<paddle::Tensor> inputs_t(inputs.size());
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for (size_t i = 0; i < inputs.size(); i++) {
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auto t = std::make_shared<DenseTensor>();
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t->ShareDataWith(inputs[i]);
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inputs_t[i].set_impl(t);
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}
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auto output = paddle::experimental::concat(inputs_t, axis);
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out->ShareDataWith(*reinterpret_cast<DenseTensor*>(output.impl().get()));
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}
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} // namespace phi
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PD_REGISTER_KERNEL(c_concat,
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Custom,
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ALL_LAYOUT,
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phi::CConcatKernel,
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float,
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phi::float16,
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phi::bfloat16) {}
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#endif
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