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paddlepaddle--paddle/paddle/phi/kernels/selected_rows/gpu/adam_kernel.cu
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// Copyright (c) 2022 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/phi/kernels/selected_rows/adam_kernel.h"
#include "glog/logging.h"
#include "paddle/phi/backends/gpu/gpu_context.h"
#include "paddle/phi/common/amp_type_traits.h"
#include "paddle/phi/core/kernel_registry.h"
#include "paddle/phi/core/tensor_utils.h"
#include "paddle/phi/kernels/funcs/adam_functors.h"
#include "paddle/phi/kernels/funcs/for_range.h"
#include "paddle/phi/kernels/funcs/selected_rows_functor.h"
namespace phi {
namespace sr {
template <typename T>
__global__ void UpdateBetaPow(T beta1,
T beta2,
const T* beta1_pow_,
const T* beta2_pow_,
T* beta1_pow_out,
T* beta2_pow_out) {
*beta1_pow_out = beta1 * beta1_pow_[0];
*beta2_pow_out = beta2 * beta2_pow_[0];
}
template <typename T, typename MT>
__global__ void SparseAdamCUDAKernelREG(MT beta1,
MT beta2,
MT epsilon,
const MT beta1_pow,
const MT beta2_pow,
const MT* mom1_,
MT* mom1_out_,
const MT* mom2_,
MT* mom2_out_,
const MT* mom2_max_,
MT* mom2_max_out_,
const double* lr_,
const T* grad_,
const T* param_,
T* param_out_,
const MT* master_param,
MT* master_param_out,
const int64_t* rows_,
int64_t row_numel,
int64_t row_count,
bool lazy_mode,
int ndim,
bool amsgrad) {
int64_t id =
static_cast<int64_t>(blockIdx.x) * static_cast<int64_t>(blockDim.x) +
static_cast<int64_t>(threadIdx.x);
MT lr = static_cast<MT>(*lr_);
for (; id < ndim; id += blockDim.x * gridDim.x) {
auto row_idx =
funcs::BinarySearch<int64_t>(rows_, row_count, id / row_numel);
if (lazy_mode && row_idx < 0) {
return;
} else {
MT mom1 = mom1_[id];
MT mom2 = mom2_[id];
MT p = master_param ? master_param[id] : static_cast<MT>(param_[id]);
MT g = row_idx >= 0
? static_cast<MT>(grad_[row_idx * row_numel + id % row_numel])
: static_cast<MT>(0);
mom1 = beta1 * mom1 + (static_cast<MT>(1.0) - beta1) * g;
mom2 = beta2 * mom2 + (static_cast<MT>(1.0) - beta2) * g * g;
MT denom;
if (amsgrad) {
MT mom2_max = mom2_max_[id];
MT moment2_max_ = std::max(mom2, mom2_max);
mom2_max_out_[id] = moment2_max_;
denom = (sqrt(moment2_max_) / sqrt(static_cast<MT>(1.0) - beta2_pow)) +
epsilon;
} else {
denom = (sqrt(mom2) / sqrt(static_cast<MT>(1.0) - beta2_pow)) + epsilon;
}
p += (mom1 / denom) * (-(lr / (static_cast<MT>(1.0) - beta1_pow)));
// Write back to global memory
mom1_out_[id] = mom1;
mom2_out_[id] = mom2;
param_out_[id] = static_cast<T>(p);
if (master_param_out) {
master_param_out[id] = p;
}
}
}
}
template <typename T, typename Context>
void AdamDenseParamSparseGradKernel(const Context& dev_ctx,
const DenseTensor& param,
const SelectedRows& grad,
const DenseTensor& learning_rate,
const DenseTensor& moment1,
const DenseTensor& moment2,
const optional<DenseTensor>& moment2_max,
const DenseTensor& beta1_pow,
const DenseTensor& beta2_pow,
const optional<DenseTensor>& master_param,
const optional<DenseTensor>& skip_update,
const Scalar& beta1,
const Scalar& beta2,
const Scalar& epsilon,
bool lazy_mode,
int64_t min_row_size_to_use_multithread,
bool multi_precision,
bool use_global_beta_pow,
bool amsgrad,
DenseTensor* param_out,
DenseTensor* moment1_out,
DenseTensor* moment2_out,
DenseTensor* moment2_max_out,
DenseTensor* beta1_pow_out,
DenseTensor* beta2_pow_out,
DenseTensor* master_param_outs) {
using MT = typename phi::dtype::MPTypeTrait<T>::Type;
VLOG(4) << "use_global_beta_pow:" << use_global_beta_pow;
bool skip_update_ = false;
if (skip_update.is_initialized()) {
PADDLE_ENFORCE_EQ(
skip_update->numel(),
1,
errors::InvalidArgument("Input(SkipUpdate) size must be 1, but get %d",
skip_update->numel()));
std::vector<bool> skip_update_vec;
TensorToVector(*skip_update, dev_ctx, &skip_update_vec);
skip_update_ = skip_update_vec[0];
}
// skip_update=true, just copy input to output, and TensorCopy will call
// mutable_data
if (skip_update_) {
VLOG(4) << "Adam skip update";
phi::Copy(dev_ctx, param, dev_ctx.GetPlace(), false, param_out);
phi::Copy(dev_ctx, moment1, dev_ctx.GetPlace(), false, moment1_out);
phi::Copy(dev_ctx, moment2, dev_ctx.GetPlace(), false, moment2_out);
if (amsgrad) {
phi::Copy(dev_ctx,
moment2_max.get(),
dev_ctx.GetPlace(),
false,
moment2_max_out);
}
if (!use_global_beta_pow) {
phi::Copy(dev_ctx, beta1_pow, beta1_pow.place(), false, beta1_pow_out);
phi::Copy(dev_ctx, beta2_pow, beta2_pow.place(), false, beta2_pow_out);
}
return;
}
MT beta1_ = beta1.to<MT>();
MT beta2_ = beta2.to<MT>();
MT epsilon_ = epsilon.to<MT>();
VLOG(3) << "beta1_pow.numel() : " << beta1_pow.numel()
<< "beta2_pow.numel() : " << beta2_pow.numel();
VLOG(3) << "param.numel(): " << param.numel();
PADDLE_ENFORCE_EQ(
beta1_pow_out->numel(),
1,
errors::InvalidArgument("beta1 pow output size should be 1, but received "
"value is:%d.",
beta1_pow_out->numel()));
PADDLE_ENFORCE_EQ(
beta2_pow_out->numel(),
1,
errors::InvalidArgument("beta2 pow output size should be 1, but received "
"value is:%d.",
beta2_pow_out->numel()));
const MT* master_in_data =
multi_precision ? master_param->data<MT>() : nullptr;
MT* master_out_data =
multi_precision ? dev_ctx.template Alloc<MT>(master_param_outs) : nullptr;
const MT* moment2_max_in_data =
amsgrad ? moment2_max.get().data<MT>() : nullptr;
MT* moment2_max_out_data =
amsgrad ? dev_ctx.template Alloc<MT>(moment2_max_out) : nullptr;
if (grad.rows().size() == 0) {
VLOG(3) << "grad row size is 0!!";
return;
}
std::vector<int64_t> cpu_rows(grad.rows().begin(), grad.rows().end());
bool is_strict_sorted = true;
for (size_t i = 1; i < cpu_rows.size(); ++i) {
if (cpu_rows[i - 1] >= cpu_rows[i]) {
is_strict_sorted = false;
break;
}
}
SelectedRows tmp_grad_merge;
const SelectedRows* grad_merge_ptr;
if (is_strict_sorted) {
grad_merge_ptr = &grad;
} else {
// merge duplicated rows if any.
// The rows of grad_merge have been sorted inside MergeAdd functor
funcs::scatter::MergeAdd<Context, T> merge_func;
merge_func(dev_ctx, grad, &tmp_grad_merge, true);
grad_merge_ptr = &tmp_grad_merge;
}
auto& grad_merge = *grad_merge_ptr;
auto& grad_tensor = grad_merge.value();
const T* grad_data = grad_tensor.template data<T>();
auto* grad_merge_rows = &grad_merge.rows();
phi::MixVector<int64_t> mixv_grad_merge_rows(grad_merge_rows);
const int64_t* rows = mixv_grad_merge_rows.Data(dev_ctx.GetPlace());
auto row_numel = grad_tensor.numel() / grad_merge.rows().size();
if (beta1_pow.place() == CPUPlace() && beta2_pow.place() == CPUPlace()) {
int threads = 512;
int64_t ndim = param.numel();
int64_t blocks = (ndim + threads - 1) / threads;
// NOTE(large-tensor): Kernel launch requires int type for grid dimension
PADDLE_ENFORCE_LE_INT_MAX(blocks, "blocks");
SparseAdamCUDAKernelREG<T, MT>
<<<static_cast<int>(blocks), threads, 0, dev_ctx.stream()>>>(
beta1_,
beta2_,
epsilon_,
*beta1_pow.data<MT>(),
*beta2_pow.data<MT>(),
moment1.data<MT>(),
dev_ctx.template Alloc<MT>(moment1_out),
moment2.data<MT>(),
dev_ctx.template Alloc<MT>(moment2_out),
moment2_max_in_data,
moment2_max_out_data,
learning_rate.data<double>(),
grad_data,
param.data<T>(),
dev_ctx.template Alloc<T>(param_out),
master_in_data,
master_out_data,
rows,
row_numel,
grad_merge.rows().size(),
lazy_mode,
ndim,
amsgrad);
if (!use_global_beta_pow) {
// Update with cpu
dev_ctx.template HostAlloc<MT>(beta1_pow_out)[0] =
beta1_ * beta1_pow.data<MT>()[0];
dev_ctx.template HostAlloc<MT>(beta2_pow_out)[0] =
beta2_ * beta2_pow.data<MT>()[0];
}
} else {
funcs::SparseAdamFunctor<T, funcs::GPUAdam, MT> functor(
beta1_,
beta2_,
epsilon_,
beta1_pow.data<MT>(),
beta2_pow.data<MT>(),
moment1.data<MT>(),
dev_ctx.template Alloc<MT>(moment1_out),
moment2.data<MT>(),
dev_ctx.template Alloc<MT>(moment2_out),
moment2_max_in_data,
moment2_max_out_data,
learning_rate.data<double>(),
grad_data,
param.data<T>(),
dev_ctx.template Alloc<T>(param_out),
master_in_data,
master_out_data,
rows,
row_numel,
grad_merge.rows().size(),
lazy_mode,
amsgrad);
// FIXME(minqiyang): remove BinarySearch in GPU later
funcs::ForRange<Context> for_range(dev_ctx, param.numel());
for_range(functor);
if (!use_global_beta_pow) {
// update beta1 and beta2
UpdateBetaPow<MT><<<1, 32, 0, dev_ctx.stream()>>>(
beta1_,
beta2_,
beta1_pow.data<MT>(),
beta2_pow.data<MT>(),
dev_ctx.template Alloc<MT>(beta1_pow_out),
dev_ctx.template Alloc<MT>(beta2_pow_out));
}
}
}
} // namespace sr
} // namespace phi
PD_REGISTER_KERNEL(adam_dense_param_sparse_grad,
GPU,
ALL_LAYOUT,
phi::sr::AdamDenseParamSparseGradKernel,
float,
double,
phi::float16) {
// Skip beta1_pow, beta2_pow, skip_update data transform
kernel->InputAt(6).SetBackend(phi::Backend::ALL_BACKEND);
kernel->InputAt(7).SetBackend(phi::Backend::ALL_BACKEND);
kernel->InputAt(9).SetBackend(phi::Backend::ALL_BACKEND);
if (kernel_key.dtype() == phi::DataType::FLOAT16) {
kernel->OutputAt(1).SetDataType(phi::DataType::FLOAT32);
kernel->OutputAt(2).SetDataType(phi::DataType::FLOAT32);
kernel->OutputAt(3).SetDataType(phi::DataType::FLOAT32);
kernel->OutputAt(4).SetDataType(phi::DataType::FLOAT32);
kernel->OutputAt(5).SetDataType(phi::DataType::FLOAT32);
kernel->OutputAt(6).SetDataType(phi::DataType::FLOAT32);
}
kernel->OutputAt(4).SetBackend(phi::Backend::UNDEFINED);
kernel->OutputAt(5).SetBackend(phi::Backend::UNDEFINED);
}