wehub-resource-sync
227 lines
7.8 KiB
Plaintext
227 lines
7.8 KiB
Plaintext
// Copyright (c) 2024 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/partial_sum_kernel.h"
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#include "paddle/phi/common/memory_utils.h"
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#include "paddle/phi/core/kernel_registry.h"
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#include "paddle/phi/kernels/impl/partial_sum_kernel_impl.h"
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namespace phi {
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#define CEIL_DIV(x, y) (((x) + (y)-1) / (y))
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template <class T>
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__global__ void SumArrayPartialCUDAKernel(T **in,
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T *out,
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int64_t lod_length,
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size_t in_size,
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int64_t start_index,
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int64_t length,
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int64_t row_length) {
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int64_t id =
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static_cast<int64_t>(blockIdx.x) * static_cast<int64_t>(blockDim.x) +
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static_cast<int64_t>(threadIdx.x);
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while (id < lod_length) {
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T total = static_cast<T>(0);
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int b_id = id / length;
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int b_offset = id % length;
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for (int i = 0; i < in_size; ++i) {
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const T *tmp = in[i];
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if (tmp) {
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total += tmp[start_index + b_id * row_length + b_offset];
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}
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}
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out[id] = total;
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id += blockDim.x * gridDim.x;
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}
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}
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template <class T>
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__global__ void PartialSumGradCUDAKernel(T **res_grad,
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const T *out_grad,
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int64_t lod_length,
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size_t in_size,
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int64_t start_index,
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int64_t length,
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int64_t row_length) {
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int64_t id =
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static_cast<int64_t>(blockIdx.x) * static_cast<int64_t>(blockDim.x) +
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static_cast<int64_t>(threadIdx.x);
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while (id < lod_length) {
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T total = static_cast<T>(0);
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int b_id = id / length;
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int b_offset = id % length;
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for (int i = 0; i < in_size; ++i) {
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T *tmp = res_grad[i];
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tmp[start_index + b_id * row_length + b_offset] = out_grad[i];
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}
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id += blockDim.x * gridDim.x;
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}
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}
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template <typename T, typename Context>
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void PartialSumOpCUDAKernel(const Context &dev_ctx,
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const std::vector<const DenseTensor *> &x,
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int start_index,
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int length,
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DenseTensor *out) {
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auto in_vars = x;
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PADDLE_ENFORCE_EQ(
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x.size() > 0,
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true,
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common::errors::InvalidArgument("The input should not be null."));
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auto place = dev_ctx.GetPlace(); // GPUPlace only now
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auto batch_size = in_vars[0]->dims()[0];
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if (length == -1) {
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length = in_vars[0]->dims()[1] - start_index;
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}
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constexpr size_t theory_sm_threads = 1024;
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auto stream = dev_ctx.stream();
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auto max_threads = dev_ctx.GetMaxPhysicalThreadCount();
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auto sm_count = max_threads / theory_sm_threads;
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size_t tile_size = 0;
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dim3 grids;
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dim3 blocks;
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auto ComputeKernelParameter = [&](size_t length) {
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if (length >= max_threads)
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tile_size = 1024;
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else if (length < max_threads && length > sm_count * 128)
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tile_size = 512;
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else if (length <= sm_count * 128)
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tile_size = 256;
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grids = dim3(CEIL_DIV(length, tile_size), 1, 1);
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blocks = dim3(tile_size, 1, 1);
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};
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auto lod_length = length * batch_size;
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auto row_length = in_vars[0]->dims()[1];
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auto in_num = in_vars.size();
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std::vector<const T *> in_data;
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for (int i = 0; i < in_num; ++i) {
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in_data.emplace_back(in_vars[i]->data<T>());
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}
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if (!in_data.empty()) {
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auto tmp_in_array = memory_utils::Alloc(
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dev_ctx.GetPlace(),
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in_data.size() * sizeof(T *),
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Stream(reinterpret_cast<StreamId>(dev_ctx.stream())));
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memory_utils::Copy(dev_ctx.GetPlace(),
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tmp_in_array->ptr(),
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CPUPlace(),
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reinterpret_cast<void *>(in_data.data()),
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in_data.size() * sizeof(T *));
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T **in_array_data = reinterpret_cast<T **>(tmp_in_array->ptr());
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ComputeKernelParameter(lod_length);
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SumArrayPartialCUDAKernel<T><<<grids, blocks, 0, stream>>>(in_array_data,
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out->data<T>(),
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lod_length,
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in_data.size(),
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start_index,
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length,
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row_length);
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}
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}
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template <typename T, typename Context>
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void PartialSumGradOpCUDAKernel(const Context &dev_ctx,
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const std::vector<const DenseTensor *> &x,
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const DenseTensor out_grad,
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int start_index,
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int length,
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std::vector<DenseTensor *> x_grad) {
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auto ins = x;
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auto outs = x_grad;
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PADDLE_ENFORCE_EQ(
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ins.size() > 0,
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true,
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common::errors::InvalidArgument("The input should not be null."));
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if (length == -1) {
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length = ins[0]->dims()[1] - start_index;
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}
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// initialize
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auto &place = *dev_ctx.eigen_device();
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for (size_t i = 0; i < outs.size(); ++i) {
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dev_ctx.template Alloc<T>(outs[i]);
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auto dxt = EigenVector<T>::Flatten(*outs[i]);
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dxt.device(place) = dxt.constant(static_cast<T>(0));
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}
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auto batch_size = ins[0]->dims()[0];
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if (length == -1) {
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length = ins[0]->dims()[1] - start_index;
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}
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auto lod_length = length * batch_size;
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auto row_length = ins[0]->dims()[1];
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auto out_num = outs.size();
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constexpr size_t theory_sm_threads = 1024;
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auto stream = dev_ctx.stream();
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auto max_threads = dev_ctx.GetMaxPhysicalThreadCount();
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auto sm_count = max_threads / theory_sm_threads;
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size_t tile_size = 0;
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dim3 grids;
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dim3 blocks;
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auto ComputeKernelParameter = [&](size_t length) {
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if (length >= max_threads)
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tile_size = 1024;
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else if (length < max_threads && length > sm_count * 128)
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tile_size = 512;
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else if (length <= sm_count * 128)
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tile_size = 256;
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grids = dim3(CEIL_DIV(length, tile_size), 1, 1);
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blocks = dim3(tile_size, 1, 1);
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};
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std::vector<const T *> out_data;
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for (int i = 0; i < out_num; ++i) {
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out_data.emplace_back(outs[i]->data<T>());
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}
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if (!out_data.empty()) {
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auto tmp_out_array = memory_utils::Alloc(
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dev_ctx.GetPlace(),
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out_data.size() * sizeof(T *),
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Stream(reinterpret_cast<StreamId>(dev_ctx.stream())));
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memory_utils::Copy(dev_ctx.GetPlace(),
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tmp_out_array->ptr(),
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CPUPlace(),
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reinterpret_cast<void *>(out_data.data()),
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out_data.size() * sizeof(T *));
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T **out_grad_data = reinterpret_cast<T **>(tmp_out_array->ptr());
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ComputeKernelParameter(lod_length);
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PartialSumGradCUDAKernel<T>
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<<<grids, blocks, 0, stream>>>(out_grad_data,
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out_grad.data<T>(),
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lod_length,
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out_data.size(),
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start_index,
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length,
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row_length);
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}
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}
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} // namespace phi
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