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// Copyright (c) 2024 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 "paddle/phi/core/kernel_registry.h"
#include "paddle/phi/kernels/fusion/gpu/cudnn_bn_stats_finalize.cu.h"
#include "paddle/phi/kernels/fusion/gpu/cudnn_norm_conv.cu.h"
#include "paddle/phi/kernels/fusion/gpu/cudnn_scale_bias_add_relu.cu.h"
#include "paddle/utils/optional.h"
#if CUDNN_VERSION >= 8000
namespace phi {
template <typename T, typename Context>
void ResNetUnitGradKernel(const Context &dev_ctx,
const DenseTensor &x_in,
const DenseTensor &filter_x_in,
const DenseTensor &conv_x_in,
const DenseTensor &scale_x_in,
const DenseTensor &bias_x_in,
const DenseTensor &saved_mean_x_in,
const DenseTensor &saved_invstd_x_in,
const optional<DenseTensor> &z_in,
const optional<DenseTensor> &filter_z_in,
const optional<DenseTensor> &conv_z_in,
const optional<DenseTensor> &scale_z_in,
const optional<DenseTensor> &bias_z_in,
const optional<DenseTensor> &saved_mean_z_in,
const optional<DenseTensor> &saved_invstd_z_in,
const DenseTensor &out,
const DenseTensor &bit_mask,
const DenseTensor &out_grad,
int stride,
int stride_z,
int padding,
int dilation,
int group,
float momentum_in,
float epsilon,
const std::string &data_format,
bool fuse_add,
bool has_shortcut,
bool use_global_stats,
bool is_test,
bool use_addto,
const std::string &act_type,
DenseTensor *x_grad,
DenseTensor *filter_x_grad,
DenseTensor *scale_x_grad,
DenseTensor *bias_x_grad,
DenseTensor *z_grad,
DenseTensor *filter_z_grad,
DenseTensor *scale_z_grad,
DenseTensor *bias_z_grad) {
PADDLE_ENFORCE_EQ(backends::gpu::CudnnDataType<T>::type,
CUDNN_DATA_HALF,
common::errors::Unavailable(
"ResNetUnitOp only supports float16 for now."));
const DenseTensor *y_grad = &out_grad;
const DenseTensor *x = &x_in;
const DenseTensor *filter_x = &filter_x_in;
const DenseTensor *scale_x = &scale_x_in;
const DenseTensor *bias_x = &bias_x_in;
const DenseTensor *saved_mean_x = &saved_mean_x_in;
const DenseTensor *saved_invstd_x = &saved_invstd_x_in;
const DenseTensor *conv_out_x = &conv_x_in;
const DenseTensor *output = &out;
const DenseTensor *bitmask = &bit_mask;
double eps = static_cast<double>(epsilon);
double momentum = static_cast<double>(momentum_in);
auto x_shape = vectorize<int>(x->dims());
auto filter_x_shape = vectorize<int>(filter_x->dims());
auto param_shape = vectorize<int>(scale_x->dims());
auto output_shape = vectorize<int>(output->dims());
auto bitmask_shape = vectorize<int>(bitmask->dims());
// 1. Backward of BN (+ Add + Relu) for x, get conv_out_x_grad,
// scale_x_grad, bias_x_grad
DenseTensor conv_out_x_grad;
conv_out_x_grad.Resize(conv_out_x->dims());
phi::fusion::CudnnScaleBiasAddRelu<T> sbar_x_op(dev_ctx,
act_type,
fuse_add,
has_shortcut,
output_shape,
param_shape,
bitmask_shape);
if (has_shortcut) {
// X Z
// | |
// NormConv NormConv
// | |
// BNStatsFinalize BNStatsFinalize
// \ /
// ScaleBiasAddRelu
// |
// Y
const DenseTensor *z = z_in.get_ptr();
const DenseTensor *filter_z = filter_z_in.get_ptr();
const DenseTensor *scale_z = scale_z_in.get_ptr();
const DenseTensor *bias_z = bias_z_in.get_ptr();
const DenseTensor *saved_mean_z = saved_mean_z_in.get_ptr();
const DenseTensor *saved_invstd_z = saved_invstd_z_in.get_ptr();
const DenseTensor *conv_out_z = conv_z_in.get_ptr();
// 1.1 Backward of BN + Add (+ Relu) for x, get conv_out_x_grad,
// scale_x_grad, bias_x_grad and z_grad_temp
DenseTensor z_grad_temp;
z_grad_temp.Resize(conv_out_z->dims());
sbar_x_op.Backward(dev_ctx,
*y_grad,
*conv_out_x,
*scale_x,
*bias_x,
*saved_mean_x,
*saved_invstd_x,
bitmask,
&conv_out_x_grad,
&z_grad_temp,
scale_x_grad,
bias_x_grad,
eps);
// 1.2 bn backward for z, get conv_out_z_grad, dscale_z, dbias_z
DenseTensor conv_out_z_grad;
conv_out_z_grad.Resize(conv_out_z->dims());
phi::fusion::CudnnScaleBiasAddRelu<T> sbar_z_op(
dev_ctx, "", false, false, output_shape, param_shape, bitmask_shape);
sbar_z_op.Backward(dev_ctx,
z_grad_temp,
*conv_out_z,
*scale_z,
*bias_z,
*saved_mean_z,
*saved_invstd_z,
nullptr,
&conv_out_z_grad,
nullptr,
scale_z_grad,
bias_z_grad,
eps);
// 1.3 Backward of Conv for z, get z_grad and filter_z_grad
auto z_shape = vectorize<int>(z->dims());
auto filter_z_shape = vectorize<int>(filter_z->dims());
phi::fusion::CudnnNormConvolutionGrad<T> conv_z_op(dev_ctx,
z_shape,
filter_z_shape,
output_shape,
padding,
stride_z,
dilation,
group);
conv_z_op.Backward(
dev_ctx, *z, *filter_z, conv_out_z_grad, z_grad, filter_z_grad);
} else {
// 1.1 Backward of BN (+ Add + Relu) for x, get conv_out_x_grad,
// scale_x_grad, bias_x_grad (and z_grad)
DenseTensor *z_grad_tmp = fuse_add ? z_grad : nullptr;
sbar_x_op.Backward(dev_ctx,
*y_grad,
*conv_out_x,
*scale_x,
*bias_x,
*saved_mean_x,
*saved_invstd_x,
bitmask,
&conv_out_x_grad,
z_grad_tmp,
scale_x_grad,
bias_x_grad,
eps);
}
// 2. Backward of Conv for x, get x_grad and filter_x_grad
phi::fusion::CudnnNormConvolutionGrad<T> conv_x_op(dev_ctx,
x_shape,
filter_x_shape,
output_shape,
padding,
stride,
dilation,
group);
conv_x_op.Backward(dev_ctx,
*x,
*filter_x,
conv_out_x_grad,
x_grad,
filter_x_grad,
use_addto);
}
} // namespace phi
PD_REGISTER_KERNEL(resnet_unit_grad,
GPU,
ALL_LAYOUT,
phi::ResNetUnitGradKernel,
phi::float16) {}
#else
namespace phi {
template <typename T, typename Context>
void ResNetUnitGradEmptyKernel(const Context &dev_ctx,
const DenseTensor &x_in,
const DenseTensor &filter_x_in,
const DenseTensor &conv_x_in,
const DenseTensor &scale_x_in,
const DenseTensor &bias_x_in,
const DenseTensor &saved_mean_x_in,
const DenseTensor &saved_invstd_x_in,
const optional<DenseTensor> &z_in,
const optional<DenseTensor> &filter_z_in,
const optional<DenseTensor> &conv_z_in,
const optional<DenseTensor> &scale_z_in,
const optional<DenseTensor> &bias_z_in,
const optional<DenseTensor> &saved_mean_z_in,
const optional<DenseTensor> &saved_invstd_z_in,
const DenseTensor &out,
const DenseTensor &bit_mask,
const DenseTensor &out_grad,
int stride,
int stride_z,
int padding,
int dilation,
int group,
float momentum_in,
float epsilon,
const std::string &data_format,
bool fuse_add,
bool has_shortcut,
bool use_global_stats,
bool is_test,
bool use_addto,
const std::string &act_type,
DenseTensor *x_grad,
DenseTensor *filter_x_grad,
DenseTensor *scale_x_grad,
DenseTensor *bias_x_grad,
DenseTensor *z_grad,
DenseTensor *filter_z_grad,
DenseTensor *scale_z_grad,
DenseTensor *bias_z_grad) {}
} // namespace phi
PD_REGISTER_KERNEL(resnet_unit_grad,
GPU,
ALL_LAYOUT,
phi::ResNetUnitGradEmptyKernel,
phi::float16) {}
#endif