提交 b6dc3a59 编写于 作者: F fengjiayi

Add DataBalanceOpHandle to MultiDeviceSSAGragh

上级 a1f1a5ed
......@@ -25,11 +25,12 @@ else()
cc_library(broadcast_op_handle SRCS broadcast_op_handle.cc DEPS op_handle_base scope ddim memory variable_visitor)
endif()
cc_library(data_balance_op_handle SRCS data_balance_op_handle.cc DEPS op_handle_base scope lod_tensor)
cc_library(gather_op_handle SRCS gather_op_handle.cc DEPS op_handle_base scope ddim memory variable_visitor)
cc_library(fuse_vars_op_handle SRCS fuse_vars_op_handle.cc DEPS op_handle_base scope)
cc_library(multi_devices_graph_builder SRCS multi_devices_graph_builder.cc DEPS ssa_graph_builder computation_op_handle
scale_loss_grad_op_handle rpc_op_handle all_reduce_op_handle reduce_op_handle broadcast_op_handle)
scale_loss_grad_op_handle rpc_op_handle all_reduce_op_handle reduce_op_handle broadcast_op_handle data_balance_op_handle)
cc_library(ssa_graph_builder_factory SRCS ssa_graph_builder_factory.cc DEPS multi_devices_graph_builder ssa_graph_printer ssa_graph_checker)
......
// Copyright (c) 2018 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/fluid/framework/details/data_balance_op_handle.h"
#include <algorithm>
#include "paddle/fluid/framework/details/container_cast.h"
namespace paddle {
namespace framework {
namespace details {
DataBalanceOpHandle::DataBalanceOpHandle(
const std::vector<Scope *> &local_scopes,
const std::vector<platform::Place> &places)
: local_scopes_(local_scopes), places_(places) {}
std::string DataBalanceOpHandle::Name() const { return "data balance"; }
std::vector<std::array<int, 3>> DataBalanceOpHandle::GetBalancePlan(
const std::vector<int> &device_sizes) {
int device_num = device_sizes.size();
int total_size = 0;
int empty_num = 0;
std::vector<std::array<int, 2>> size_device_vec;
size_device_vec.reserve(device_num);
for (int i = 0; i < device_num; ++i) {
if (device_sizes[i] == 0) {
++empty_num;
}
total_size += device_sizes[i];
size_device_vec.push_back({{device_sizes[i], i}});
}
std::vector<std::array<int, 3>> res;
if (empty_num == 0) {
// No need to do data balance.
return res;
}
if (total_size < device_num) {
// No enough data.
PADDLE_THROW("There is no next data.");
}
std::sort(size_device_vec.begin(), size_device_vec.end(),
[](const std::array<int, 2> &a, const std::array<int, 2> &b) {
return a[0] > b[0];
});
int expected_device_size = total_size / device_num;
int src_idx = 0;
for (int dst_idx = device_num - empty_num; dst_idx < device_num; ++dst_idx) {
if (size_device_vec[src_idx][0] <= expected_device_size) {
++src_idx;
PADDLE_ENFORCE_LT(src_idx, device_num - empty_num);
}
size_device_vec[src_idx][0] -= expected_device_size;
size_device_vec[dst_idx][0] += expected_device_size;
res.push_back({{size_device_vec[src_idx][1], size_device_vec[dst_idx][1],
expected_device_size}});
}
return res;
}
void DataBalanceOpHandle::RunImpl() {
if (places_.size() == 1) {
return;
}
auto in_var_handles = DynamicCast<VarHandle>(inputs_);
auto out_var_handles = DynamicCast<VarHandle>(outputs_);
PADDLE_ENFORCE(in_var_handles.size() % places_.size() == 0);
PADDLE_ENFORCE_EQ(
in_var_handles.size(), out_var_handles.size(),
"The NoDummyInputSize and NoDummyOutputSize should be equal.");
int data_num = in_var_handles.size() / places_.size();
WaitInputVarGenerated();
std::vector<std::vector<LoDTensor *>> lod_tensors;
std::vector<int> device_sizes;
for (int i = 0; i < static_cast<int>(in_var_handles.size()); ++i) {
PADDLE_ENFORCE_EQ(in_var_handles[i]->name_, out_var_handles[i]->name_,
"The name of input and output should be equal.");
int place_idx = i / data_num;
int data_idx = i % data_num;
auto *local_scope =
local_scopes_[place_idx]->FindVar(kLocalExecScopeName)->Get<Scope *>();
auto *tensor_var = local_scope->FindVar(in_var_handles[i]->name_);
PADDLE_ENFORCE(tensor_var->IsType<LoDTensor>());
auto *tensor = tensor_var->GetMutable<LoDTensor>();
PADDLE_ENFORCE(places_[place_idx] == tensor->place());
lod_tensors[data_idx].push_back(tensor);
int ins_size =
tensor->lod().empty() ? tensor->dims()[0] : tensor->NumElements();
if (data_idx == 0) {
device_sizes.emplace_back(ins_size);
} else {
PADDLE_ENFORCE_EQ(ins_size, device_sizes.at(place_idx));
}
}
const auto &balance_plan = GetBalancePlan(device_sizes);
for (const auto &trans : balance_plan) {
for (int data_idx = 0; data_idx < data_num; ++data_idx) {
LoDTensor *src_tensor = lod_tensors[data_idx][trans[0]];
LoDTensor *dst_tensor = lod_tensors[data_idx][trans[1]];
int trans_ins_size = trans[2];
LoD src_lod = src_tensor->lod();
int src_ins_size =
src_lod.empty() ? src_tensor->dims()[0] : src_tensor->NumElements();
int cut_point = src_ins_size - trans_ins_size;
if (!src_lod.empty()) {
for (auto &level : src_lod) {
cut_point = level[cut_point];
}
}
TensorCopySync(src_tensor->Slice(cut_point, src_tensor->dims()[0]),
dst_tensor->place(), dst_tensor);
src_tensor->ShareDataWith(src_tensor->Slice(0, cut_point));
if (!src_lod.empty()) {
dst_tensor->set_lod(SliceInLevel(
src_lod, 0, src_ins_size - trans_ins_size, src_ins_size));
src_tensor->set_lod(
SliceInLevel(src_lod, 0, 0, src_ins_size - trans_ins_size));
}
}
}
}
} // namespace details
} // namespace framework
} // namespace paddle
// Copyright (c) 2018 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 <string>
#include <vector>
#include "paddle/fluid/framework/details/op_handle_base.h"
#include "paddle/fluid/framework/lod_tensor.h"
#include "paddle/fluid/framework/scope.h"
namespace paddle {
namespace framework {
namespace details {
struct DataBalanceOpHandle : public OpHandleBase {
public:
DataBalanceOpHandle(const std::vector<Scope *> &local_scopes,
const std::vector<platform::Place> &places);
std::string Name() const override;
bool IsMultiDeviceTransfer() override { return false; };
protected:
void RunImpl() override;
private:
// std::vector<(src_dev_id, dst_dev_id, trans_size)>
std::vector<std::array<int, 3>> GetBalancePlan(
const std::vector<int> &batch_size_per_device);
const std::vector<Scope *> &local_scopes_;
const std::vector<platform::Place> &places_;
};
} // namespace details
} // namespace framework
} // namespace paddle
......@@ -20,6 +20,7 @@
#include "paddle/fluid/framework/details/all_reduce_op_handle.h"
#include "paddle/fluid/framework/details/broadcast_op_handle.h"
#include "paddle/fluid/framework/details/computation_op_handle.h"
#include "paddle/fluid/framework/details/data_balance_op_handle.h"
#include "paddle/fluid/framework/details/multi_devices_graph_builder.h"
#include "paddle/fluid/framework/details/reduce_op_handle.h"
#include "paddle/fluid/framework/details/rpc_op_handle.h"
......@@ -217,6 +218,11 @@ std::unique_ptr<SSAGraph> MultiDevSSAGraphBuilder::Build(
// gradients.
CreateComputationalOps(&result, *op, places_.size());
if (op->Type() == "read") {
const auto &data_var_names = op->Output("Out");
InsertDataBalanceOp(&result, data_var_names);
}
if (!is_forwarding && places_.size() > 1) {
// Currently, we assume that once gradient is generated, it can be
// broadcast, and each gradient is only broadcast once.
......@@ -360,6 +366,24 @@ void MultiDevSSAGraphBuilder::InsertAllReduceOp(SSAGraph *result,
}
}
void MultiDevSSAGraphBuilder::InsertDataBalanceOp(
SSAGraph *result, const std::vector<std::string> &datas) const {
result->ops_.emplace_back(new DataBalanceOpHandle(local_scopes_, places_));
auto *op_handle = result->ops_.back().get();
for (size_t i = 0; i < places_.size(); ++i) {
auto &p = places_[i];
SetCommunicationContext(op_handle, p);
for (const std::string &d_name : datas) {
auto &vars = result->vars_[i][d_name];
PADDLE_ENFORCE(!vars.empty());
op_handle->AddInput(vars.back().get());
auto var = new VarHandle(vars.size(), i, d_name, p);
vars.emplace_back(var);
op_handle->AddOutput(var);
}
}
}
bool MultiDevSSAGraphBuilder::IsParameterGradientOnce(
const std::string &og,
std::unordered_set<std::string> *og_has_been_broadcast) const {
......@@ -509,7 +533,8 @@ void MultiDevSSAGraphBuilder::CreateRPCOp(SSAGraph *result,
op_dev_id = GetVarDeviceID(op.InputArgumentNames()[0]);
// the variable name which contains .block means it was splited by
// split_byref op
// so that we can balance the variable blocks to all the pserver instances.
// so that we can balance the variable blocks to all the pserver
// instances.
if (strategy_.reduce_ == BuildStrategy::ReduceStrategy::kAllReduce &&
op.InputArgumentNames()[0].find(".block") == std::string::npos) {
op_dev_id = GetAppropriateDeviceID(op.InputArgumentNames());
......
......@@ -101,6 +101,9 @@ class MultiDevSSAGraphBuilder : public SSAGraphBuilder {
void InsertAllReduceOp(SSAGraph *result, const std::string &og) const;
void InsertDataBalanceOp(SSAGraph *result,
const std::vector<std::string> &datas) const;
void CreateBroadcastOp(SSAGraph *result, const std::string &p_name,
size_t src_dev_id) const;
......
......@@ -68,7 +68,7 @@ std::ostream &operator<<(std::ostream &os, const LoDTensor &t) {
// only print first ten elements
int64_t size = t.numel() < 10 ? t.numel() : 10;
for (int64_t i = 0; i < size; ++i) {
if (t.type().hash_code() == typeid(float).hash_code()) {
if (t.type().hash_code() == typeid(float).hash_code()) { // NOLINT
os << t.data<float>()[i] << " ";
} else if (t.type().hash_code() == typeid(int64_t).hash_code()) {
os << t.data<int64_t>()[i] << " ";
......@@ -89,6 +89,7 @@ std::string LoDToString(const LoD &lod) {
LoD SliceInLevel(const LoD &in, size_t level, size_t elem_begin,
size_t elem_end) {
PADDLE_ENFORCE_LT(level, in.size());
PADDLE_ENFORCE_LT(elem_begin, elem_end);
PADDLE_ENFORCE_LT(elem_end, in[level].size());
LoD res;
......
......@@ -66,9 +66,15 @@ class ReadOp : public framework::OperatorBase {
std::vector<std::string> out_arg_names = Outputs("Out");
std::vector<framework::LoDTensor> ins;
reader->ReadNext(&ins);
PADDLE_ENFORCE(!ins.empty(), "There is no next data.");
if (ins.empty()) {
ins.resize(out_arg_names.size());
for (auto& tensor : ins) {
// data type is not important for subsequent DataBalanceOpHandle
tensor.mutable_data<float>(framework::make_ddim({0}), dev_place);
}
}
PADDLE_ENFORCE_EQ(ins.size(), out_arg_names.size());
for (size_t i = 0; i < ins.size(); ++i) {
for (size_t i = 0; i < out_arg_names.size(); ++i) {
auto* out =
scope.FindVar(out_arg_names[i])->GetMutable<framework::LoDTensor>();
out->ShareDataWith(ins[i]);
......
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