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quant_conv2d_dequant_fuse_pass.cc
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quant_conv2d_dequant_fuse_pass.cc
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// 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/ir/quant_conv2d_dequant_fuse_pass.h"
#include <string>
#include "paddle/fluid/framework/op_version_registry.h"
namespace paddle {
namespace framework {
namespace ir {
QuantDequantFusePass::QuantDequantFusePass() {
AddOpCompat(OpCompat("fake_quantize_range_abs_max"))
.AddInput("X")
.IsTensor()
.End()
.AddInput("InScale")
.IsTensor()
.End()
.AddInput("Iter")
.IsTensor()
.IsOptional()
.End()
.AddOutput("Out")
.IsTensor()
.End()
.AddOutput("OutScale")
.IsTensor()
.End()
.AddOutput("OutScales")
.IsTensor()
.IsOptional()
.End()
.AddAttr("window_size")
.IsType<int>()
.IsNumGT(0)
.End()
.AddAttr("bit_length")
.IsIntIn({8, 16})
.End();
AddOpCompat(OpCompat("fake_quantize_moving_average_abs_max"))
.AddInput("X")
.IsTensor()
.End()
.AddInput("InScale")
.IsTensor()
.End()
.AddInput("InAccum")
.IsTensor()
.IsOptional()
.End()
.AddInput("InState")
.IsTensor()
.IsOptional()
.End()
.AddOutput("Out")
.IsTensor()
.End()
.AddOutput("OutScale")
.IsTensor()
.End()
.AddOutput("OutState")
.IsTensor()
.IsOptional()
.End()
.AddOutput("OutAccum")
.IsTensor()
.IsOptional()
.End()
.AddAttr("moving_rate")
.IsType<float>()
.IsNumGT(0.0f)
.End()
.AddAttr("bit_length")
.IsIntIn({8, 16})
.End();
AddOpCompat(OpCompat("fake_dequantize_max_abs"))
.AddInput("X")
.IsTensor()
.End()
.AddInput("Scale")
.IsTensor()
.End()
.AddOutput("Out")
.IsTensor()
.End()
.AddAttr("max_range")
.IsType<float>()
.IsNumGT(0.0f)
.End();
AddOpCompat(OpCompat("fake_channel_wise_dequantize_max_abs"))
.AddInput("X")
.IsTensor()
.End()
.AddInput("Scales") // "Scales" is a vector with at most two tensors
.End()
.AddOutput("Out")
.IsTensor()
.End()
.AddAttr("quant_bits")
.IsType<std::vector<int>>()
.End()
.AddAttr("quant_axis")
.IsIntIn({0, 1})
.IsOptional()
.End()
.AddAttr("x_num_col_dims")
.IsType<int>()
.IsOptional()
.End();
AddOpCompat(OpCompat("conv2d"))
.AddInput("Input")
.IsTensor()
.End()
.AddInput("Filter")
.IsTensor()
.End()
.AddInput("Bias")
.IsTensor()
.IsOptional()
.End()
.AddInput("ResidualData")
.IsTensor()
.IsOptional()
.End()
.AddOutput("Output")
.IsTensor()
.End()
.AddAttr("strides")
.IsType<std::vector<int>>()
.End()
.AddAttr("paddings")
.IsType<std::vector<int>>()
.End()
.AddAttr("padding_algorithm")
.IsOptional()
.IsStringIn({"EXPLICIT", "SAME", "VALID"})
.End()
.AddAttr("groups")
.IsNumGE(1)
.End()
.AddAttr("dilations")
.IsType<std::vector<int>>()
.End()
.AddAttr("data_format")
.IsStringIn({"NCHW", "NHWC", "AnyLayout"})
.End();
AddOpCompat(OpCompat("depthwise_conv2d"))
.AddInput("Input")
.IsTensor()
.End()
.AddInput("Filter")
.IsTensor()
.End()
.AddInput("Bias")
.IsTensor()
.IsOptional()
.End()
.AddInput("ResidualData")
.IsTensor()
.IsOptional()
.End()
.AddOutput("Output")
.IsTensor()
.End()
.AddAttr("strides")
.IsType<std::vector<int>>()
.End()
.AddAttr("paddings")
.IsType<std::vector<int>>()
.End()
.AddAttr("padding_algorithm")
.IsOptional()
.IsStringIn({"EXPLICIT", "SAME", "VALID"})
.End()
.AddAttr("groups")
.IsNumGE(1)
.End()
.AddAttr("dilations")
.IsType<std::vector<int>>()
.End()
.AddAttr("data_format")
.IsStringIn({"NCHW", "NHWC", "AnyLayout"})
.End();
AddOpCompat(OpCompat("mul"))
.AddInput("X")
.IsTensor()
.End()
.AddInput("Y")
.IsTensor()
.End()
.AddOutput("Out")
.IsTensor()
.End()
.AddAttr("x_num_col_dims")
.IsNumGE(1)
.End()
.AddAttr("y_num_col_dims")
.IsNumEQ(1)
.End();
AddOpCompat(OpCompat("matmul_v2"))
.AddInput("X")
.IsTensor()
.End()
.AddInput("Y")
.IsTensor()
.End()
.AddOutput("Out")
.IsTensor()
.End()
.AddAttr("trans_x")
.IsBoolEQ(false)
.End()
.AddAttr("trans_y")
.IsBoolEQ(false)
.End();
AddOpCompat(OpCompat("matmul"))
.AddInput("X")
.IsTensor()
.End()
.AddInput("Y")
.IsTensor()
.End()
.AddOutput("Out")
.IsTensor()
.End()
.AddAttr("alpha")
.IsNumGE(0.99f)
.IsNumLE(1.01f)
.End()
.AddAttr("transpose_X")
.IsBoolEQ(false)
.End()
.AddAttr("transpose_Y")
.IsBoolEQ(false)
.End();
AddOpCompat(OpCompat("fc"))
.AddInput("Input")
.IsTensor()
.End()
.AddInput("W")
.IsTensor()
.End()
.AddInput("Bias")
.IsTensor()
.End()
.AddOutput("Out")
.IsTensor()
.End()
.AddAttr("in_num_col_dims")
.IsNumGE(1)
.End()
.AddAttr("activation_type")
.IsStringIn({"relu", ""})
.End();
AddOpCompat(OpCompat("conv2d_transpose"))
.AddInput("Input")
.IsTensor()
.End()
.AddInput("Filter")
.IsTensor()
.End()
.AddInput("Bias")
.IsTensor()
.IsOptional()
.End()
.AddOutput("Output")
.IsTensor()
.End()
.AddAttr("output_padding")
.IsType<std::vector<int>>()
.IsOptional()
.End()
.AddAttr("output_size")
.IsType<std::vector<int>>()
.IsOptional()
.End()
.AddAttr("groups")
.IsNumGE(1)
.End()
.AddAttr("dilations")
.IsType<std::vector<int>>()
.End()
.AddAttr("strides")
.IsType<std::vector<int>>()
.End()
.AddAttr("paddings")
.IsType<std::vector<int>>()
.End()
.AddAttr("padding_algorithm")
.IsOptional()
.IsStringIn({"EXPLICIT", "SAME", "VALID"})
.End()
.AddAttr("data_format")
.IsStringIn({"NCHW", "NHWC", "AnyLayout"})
.End();
}
// Delete quant op before quantized ops, and set input scale in the attr of
// quantized ops
void QuantDequantFusePass::DeleteQuant(ir::Graph* graph, Scope* scope,
const std::string& quant_type) const {
const std::string pattern_name = "delete_quant_fuse";
GraphPatternDetector gpd;
auto* input_act_node = gpd.mutable_pattern()
->NewNode("input_act_node")
->assert_is_op_input(quant_type, "X")
->AsInput();
// Create pattern
patterns::DeleteQuantOpFuse pattern(gpd.mutable_pattern(), pattern_name);
pattern(input_act_node, quant_type);
// extract input scale from quant op input to set it in attr of all quantized
// ops linked from it
auto handler = [&](const GraphPatternDetector::subgraph_t& subgraph,
Graph* g) {
if (!IsCompat(subgraph, g)) {
LOG(WARNING) << "Pass in op compat failed.";
return;
}
PADDLE_ENFORCE_EQ(
subgraph.count(input_act_node), true,
platform::errors::NotFound(
"Input act node(%s) not found in QuantDequantFuse pass.",
input_act_node->name()));
Node* input_act = subgraph.at(input_act_node);
Node* input_scale = subgraph.at(pattern.GetPDNode("input_scale_node"));
Node* quant = subgraph.at(pattern.GetPDNode("quant_node"));
Node* output_scale = subgraph.at(pattern.GetPDNode("output_scale_node"));
Node* output_act = subgraph.at(pattern.GetPDNode("output_act_node"));
int bit_length = BOOST_GET_CONST(int, quant->Op()->GetAttr("bit_length"));
int range = ((1 << (bit_length - 1)) - 1);
// Get input scale from tensor
std::string input_scale_var_name = quant->Op()->Input("InScale").front();
PADDLE_ENFORCE_NOT_NULL(
scope, platform::errors::InvalidArgument(
"Scope in QuantDequantFuse pass should not be null."));
const LoDTensor& input_scale_tensor =
scope->FindVar(input_scale_var_name)->Get<LoDTensor>();
PADDLE_ENFORCE_EQ(
paddle::platform::is_cpu_place(input_scale_tensor.place()), true,
platform::errors::InvalidArgument(
"Input scale tensor's place should be CPU."));
const float* input_scale_data = input_scale_tensor.data<float>();
float in_scale = input_scale_data[0];
float scale_value = in_scale / range;
// Set input scale in attr, and relink nodes
std::string input_act_name = input_act->Var()->Name();
std::string output_act_name = output_act->Var()->Name();
auto outlinks = output_act->outputs;
for (auto* quantized_node : outlinks) {
auto op_desc = quantized_node->Op();
std::string quantized_op_type = op_desc->Type();
if (quantized_op_type == "conv2d" ||
quantized_op_type == "conv2d_fusion" ||
quantized_op_type == "depthwise_conv2d" ||
quantized_op_type == "fc" ||
quantized_op_type == "conv2d_transpose") {
op_desc->SetAttr("Input_scale", scale_value);
} else if (quantized_op_type == "mul" || quantized_op_type == "matmul" ||
quantized_op_type == "matmul_v2") {
op_desc->SetAttr("X_scale", scale_value);
} else {
PADDLE_THROW(platform::errors::Unimplemented(
"Unsupported quantized op type %s.", quantized_op_type));
}
op_desc->SetAttr("bit_length", bit_length);
op_desc->RenameInput(output_act_name, input_act_name);
op_desc->Flush();
IR_NODE_LINK_TO(input_act, quantized_node);
}
// Delete nodes and edges
std::unordered_set<const Node*> nodes2rm = {input_scale, quant,
output_scale, output_act};
GraphSafeRemoveNodes(graph, nodes2rm);
};
gpd(graph, handler);
}
// Delete dequant op after quantized ops, and convert weight from fp32 range to
// int8 range
void QuantDequantFusePass::FuseDequant(ir::Graph* graph, Scope* scope,
const std::string& quantized_op_type,
const std::string& dequant_type) const {
std::string weight_name = "";
std::string input_name = "";
if (quantized_op_type == "conv2d" ||
quantized_op_type == "depthwise_conv2d" ||
quantized_op_type == "conv2d_fusion" ||
quantized_op_type == "conv2d_transpose") {
weight_name = "Filter";
input_name = "Input";
} else if (quantized_op_type == "mul" || quantized_op_type == "matmul" ||
quantized_op_type == "matmul_v2") {
weight_name = "Y";
input_name = "X";
} else if (quantized_op_type == "fc") {
weight_name = "W";
input_name = "Input";
} else {
PADDLE_THROW(platform::errors::Unimplemented(
"QuantDequantFuse: We only support conv2d, conv2d_fusion, "
"conv2d_transpose, fc, mul, matmul, matmul_v2 for "
"now."));
}
const std::string pattern_name = "dequant_fuse";
GraphPatternDetector gpd;
auto* quantized_op_input =
gpd.mutable_pattern()
->NewNode("quantized_op_input")
->assert_is_op_input(quantized_op_type, input_name)
->AsInput();
// Create pattern
patterns::DequantOpFuse pattern(gpd.mutable_pattern(), pattern_name);
pattern(quantized_op_input, quantized_op_type, dequant_type, weight_name);
// Create new op desc
auto handler = [&](const GraphPatternDetector::subgraph_t& subgraph,
Graph* g) {
if (!IsCompat(subgraph, g)) {
LOG(WARNING) << "Pass in op compat failed.";
return;
}
PADDLE_ENFORCE_EQ(
subgraph.count(quantized_op_input), true,
platform::errors::NotFound("Quantized op input node(%s) did not find "
"in QuantDequantFuse pass.",
quantized_op_input->name()));
Node* quantized_op_input_node = subgraph.at(quantized_op_input);
Node* quantized_op_weight_node =
subgraph.at(pattern.GetPDNode("quantized_op_weight"));
Node* quantized_op_node = subgraph.at(pattern.GetPDNode("quantized_op"));
Node* dequant_op_node = subgraph.at(pattern.GetPDNode("dequant_op"));
Node* dequant_op_out_node =
subgraph.at(pattern.GetPDNode("dequant_op_out"));
std::unordered_set<const Node*> nodes2rm = {};
int bit_length =
BOOST_GET_CONST(int, quantized_op_node->Op()->GetAttr("bit_length"));
int range = ((1 << (bit_length - 1)) - 1);
std::vector<float> weight_scale;
int quant_axis = 0;
if (dequant_op_node->Op()->HasAttr("quant_axis")) {
quant_axis =
BOOST_GET_CONST(int, dequant_op_node->Op()->GetAttr("quant_axis"));
}
// Get weight scale
if (dequant_type == "fake_channel_wise_dequantize_max_abs") {
Node* dequant_channel_scale_node =
subgraph.at(pattern.GetPDNode("dequant_channel_scale"));
auto scales_name = dequant_op_node->Op()->Input("Scales");
PADDLE_ENFORCE_EQ(
scales_name.size(), 2,
platform::errors::InvalidArgument(
"Scales size in channel-wise dequantize op should be 2, got %d.",
scales_name.size()));
const LoDTensor& channel_scale_tensor =
scope->FindVar(scales_name[0])->Get<LoDTensor>();
PADDLE_ENFORCE_EQ(
paddle::platform::is_cpu_place(channel_scale_tensor.place()), true,
platform::errors::InvalidArgument(
"Channel scale tensor's place should be CPU."));
const float* channel_scale_data = channel_scale_tensor.data<float>();
for (int i = 0; i < channel_scale_tensor.numel(); i++) {
weight_scale.push_back(channel_scale_data[i] / range);
}
nodes2rm.insert(dequant_channel_scale_node);
} else {
float max_range =
BOOST_GET_CONST(float, dequant_op_node->Op()->GetAttr("max_range"));
weight_scale.push_back((range * range) / max_range / range);
}
// Convert weight to fp32 range
auto* weight_tensor =
scope->Var(quantized_op_weight_node->Name())->GetMutable<LoDTensor>();
auto w_dims = weight_tensor->dims();
float* quantized_weight_data =
weight_tensor->mutable_data<float>(platform::CPUPlace());
// If quantized op is fc, weight scale size = 1;
// If quantized op is conv2d, weight scale size = weight dims[0]
// If quantized op is conv2d_transpose, weight scale size = weight dims[1]
if (quantized_op_type == "mul" || quantized_op_type == "matmul" ||
quantized_op_type == "matmul_v2" || quantized_op_type == "fc") {
if (dequant_type == "fake_dequantize_max_abs") {
PADDLE_ENFORCE_EQ(weight_scale.size(), 1,
platform::errors::InvalidArgument(
"mul/matmul/matmul_v2 op weight dequantized by "
"[fake_dequantize_max_abs] "
"requires weight scale size = 1, but got %d.",
weight_scale.size()));
for (int j = 0; j < weight_tensor->numel(); j++) {
quantized_weight_data[j] *= weight_scale[0];
}
}
if (dequant_type == "fake_channel_wise_dequantize_max_abs") {
if (quant_axis == 0) {
} else {
PADDLE_ENFORCE_EQ(
quant_axis == 1, true,
platform::errors::InvalidArgument(
"'quant_axis' of mul/matmul/fc/matmul_v2 op weight "
"dequantized by "
"[fake_channel_wise_dequantize_max_abs]should be 1, but "
"the received is %d",
quant_axis));
}
PADDLE_ENFORCE_EQ(
weight_scale.size(), static_cast<size_t>(w_dims[1]),
platform::errors::InvalidArgument(
"mul/matmul/matmul_v2 op weight dequantized by "
"[fake_channel_wise_dequantize_max_abs] requires weight scale "
"size = 2nd dim of mul/matmul/matmul_v2's weight, which is %d, "
"but got "
"%d.",
static_cast<size_t>(w_dims[1]), weight_scale.size()));
for (int j = 0; j < weight_tensor->numel(); j++) {
quantized_weight_data[j] *= weight_scale[j % w_dims[1]];
}
}
} else if (quantized_op_type == "conv2d" ||
quantized_op_type == "depthwise_conv2d") {
PADDLE_ENFORCE_EQ(
dequant_type, "fake_channel_wise_dequantize_max_abs",
platform::errors::InvalidArgument(
"conv2d op must be dequantized by "
"[fake_channel_wise_dequantize_max_abs], but got %s. "
"If you uses PaddleSlim to generate the quantized "
"model, please set the 'weight_quantize_type' params as "
"'channel_wise_abs_max' and generate the quantized model again.",
dequant_type));
if (quant_axis == 0) {
} else {
PADDLE_ENFORCE_EQ(
quant_axis == 0, true,
platform::errors::InvalidArgument(
"'quant_axis' of conv2d/depthwise_conv2d op weight dequantized "
"by [fake_channel_wise_dequantize_max_abs]should be 0, but "
"the received is %d",
quant_axis));
}
PADDLE_ENFORCE_EQ(
weight_scale.size(), static_cast<size_t>(w_dims[0]),
platform::errors::InvalidArgument(
"conv2d op requires weight scale size = channel size of the "
"weight, which is %d, but got %d.",
static_cast<size_t>(w_dims[0]), weight_scale.size()));
for (int j = 0; j < weight_tensor->numel(); j++) {
int inner_size = w_dims[1] * w_dims[2] * w_dims[3];
quantized_weight_data[j] *= weight_scale[j / inner_size];
}
} else if (quantized_op_type == "conv2d_transpose") {
PADDLE_ENFORCE_EQ(
dequant_type, "fake_channel_wise_dequantize_max_abs",
platform::errors::InvalidArgument(
"conv2d_transpose must be dequantized by "
"[fake_channel_wise_dequantize_max_abs], but got %s",
dequant_type));
if (quant_axis == 0) {
} else {
PADDLE_ENFORCE_EQ(
quant_axis == 1, true,
platform::errors::InvalidArgument(
"'quant_axis' of conv2d_transpose op weight dequantized by "
"[fake_channel_wise_dequantize_max_abs]should be 1, but "
"the received is %d",
quant_axis));
}
PADDLE_ENFORCE_EQ(
weight_scale.size(), static_cast<size_t>(w_dims[1]),
platform::errors::InvalidArgument(
"conv2d_transpose op requires weight scale size = channel size "
"of the weight, which is %d, but got %d.",
static_cast<size_t>(w_dims[1]), weight_scale.size()));
for (int j = 0; j < weight_tensor->numel(); j++) {
int inner_size = w_dims[2] * w_dims[3];
quantized_weight_data[j] *= weight_scale[(j / inner_size) % w_dims[1]];
}
} else {
PADDLE_THROW(platform::errors::InvalidArgument(
"Unsupported quantized op type: %s", quantized_op_type));
}
// create new op_desc
auto base_op_desc = *quantized_op_node->Op()->Proto();
std::string new_input = quantized_op_input_node->Name();
std::string new_output = dequant_op_out_node->Name();
framework::OpDesc new_op_desc(base_op_desc,
quantized_op_node->Op()->Block());
new_op_desc.SetType(quantized_op_type);
new_op_desc.SetAttr("enable_int8", true);
if (quantized_op_type == "conv2d" || quantized_op_type == "conv2d_fusion" ||
quantized_op_type == "depthwise_conv2d" ||
quantized_op_type == "conv2d_transpose") {
new_op_desc.SetInput("Input", {new_input});
new_op_desc.SetOutput("Output", {new_output});
} else if (quantized_op_type == "fc") {
new_op_desc.SetInput("Input", {new_input});
new_op_desc.SetOutput("Out", {new_output});
} else if (quantized_op_type == "mul" || quantized_op_type == "matmul" ||
quantized_op_type == "matmul_v2") {
new_op_desc.SetInput("X", {new_input});
new_op_desc.SetOutput("Out", {new_output});
}
new_op_desc.SetAttr("weight_scale", weight_scale);
new_op_desc.Flush();
auto* new_op = graph->CreateOpNode(&new_op_desc);
IR_NODE_LINK_TO(quantized_op_input_node, new_op);
IR_NODE_LINK_TO(quantized_op_weight_node, new_op);
IR_NODE_LINK_TO(new_op, dequant_op_out_node);
// Delete nodes and edges
nodes2rm.insert(quantized_op_node);
nodes2rm.insert(dequant_op_node);
GraphSafeRemoveNodes(graph, nodes2rm);
};
gpd(graph, handler);
}
void QuantDequantFusePass::ApplyImpl(ir::Graph* graph) const {
const std::string pattern_name = "quant_dequant_fuse";
FusePassBase::Init(pattern_name, graph);
std::unordered_set<std::string> dequant_types = {
"fake_channel_wise_dequantize_max_abs", "fake_dequantize_max_abs"};
std::unordered_set<std::string> quant_types = {
"fake_quantize_range_abs_max", "fake_quantize_moving_average_abs_max"};
std::unordered_set<std::string> quantized_op_types = {
"conv2d", "mul", "matmul", "depthwise_conv2d",
"conv2d_transpose", "fc", "matmul_v2",
};
auto* scope = param_scope();
for (auto& quant_type : quant_types) {
DeleteQuant(graph, scope, quant_type);
}
for (auto& dequant_type : dequant_types) {
for (auto& quantized_op_type : quantized_op_types) {
FuseDequant(graph, scope, quantized_op_type, dequant_type);
}
}
}
} // namespace ir
} // namespace framework
} // namespace paddle
REGISTER_PASS(quant_conv2d_dequant_fuse_pass,
paddle::framework::ir::QuantDequantFusePass);
REGISTER_PASS_CAPABILITY(quant_conv2d_dequant_fuse_pass)
.AddCombination(
paddle::framework::compatible::OpVersionComparatorCombination()
.LE("conv2d", 1)
.EQ("fc", 0)
.LE("conv2d_transpose", 2)
.EQ("fake_quantize_abs_max", 0)
.EQ("fake_quantize_range_abs_max", 0)
.EQ("fake_quantize_moving_average_abs_max", 0)
.LE("fake_channel_wise_quantize_abs_max", 1)
.EQ("fake_dequantize_max_abs", 0));