wehub-resource-sync
86 lines
3.1 KiB
C++
86 lines
3.1 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 <glog/logging.h>
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#include "paddle/phi/api/backward/backward_api_base.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 CBroadcastKernel(const Context& dev_ctx,
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const DenseTensor& x_in,
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int root,
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DenseTensor* out) {
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auto x = &x_in;
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const auto& place = dev_ctx.GetPlace();
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dev_ctx.template Alloc<T>(out);
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auto comm = reinterpret_cast<phi::distributed::XCCLCommContext*>(
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dev_ctx.GetCommContext());
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std::shared_ptr<phi::stream::Stream> stream;
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stream = comm->GetStream();
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int numel = x->numel();
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auto dtype = x->dtype();
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if (root == comm->GetRank()) {
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phi::DeviceManager::CCLBroadcast(place.GetDeviceType(),
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const_cast<void*>(x->data()),
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numel,
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dtype,
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root,
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comm->GetXcclComm(),
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stream->raw_stream());
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VLOG(3) << "rank " << comm->GetRank() << " invoke Bcast. sent "
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<< x->numel();
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if (out != x) {
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phi::Copy(dev_ctx,
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*static_cast<const DenseTensor*>(x),
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place,
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false,
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static_cast<DenseTensor*>(out));
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}
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} else {
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phi::DeviceManager::CCLBroadcast(place.GetDeviceType(),
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out->data(),
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numel,
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dtype,
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root,
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comm->GetXcclComm(),
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stream->raw_stream());
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VLOG(3) << "rank " << comm->GetRank() << " invoke Bcast. received "
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<< common::product(out->dims());
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}
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out->set_lod(x->lod());
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}
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} // namespace phi
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PD_REGISTER_KERNEL(c_broadcast,
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Custom,
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ALL_LAYOUT,
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phi::CBroadcastKernel,
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float,
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double,
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int32_t,
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int64_t,
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phi::float16) {}
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#endif
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