1/**
2 * Copyright (c) Glow Contributors. See CONTRIBUTORS file.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "glow/Graph/Graph.h"
18#include "glow/Graph/Node.h"
19#include "glow/Graph/Nodes.h"
20#include "glow/Optimizer/GraphOptimizer/GraphOptimizer.h"
21
22#include <unordered_set>
23
24using namespace glow;
25
26void glow::profileQuantization(
27 PlaceholderBindings &bindings, Function *F,
28 const quantization::ProfilingConfiguration &profConfig) {
29 // Iterate over all nodes in the graph and insert QuantizationProfile nodes
30 // to observe tensor values from every node's output.
31 std::unordered_set<NodeValue> nodesToInstrument;
32
33 // Add Quantization Profile node to all of the floating point outputs.
34 for (auto &node : F->getNodes()) {
35 for (unsigned i = 0, e = node.getNumResults(); i < e; ++i) {
36 if (node.getElementType(i) != ElemKind::FloatTy) {
37 continue;
38 }
39 nodesToInstrument.insert(node.getNthResult(i));
40 }
41 }
42
43 // Add Quantization Profile node to all floating point vars.
44 for (const auto &var : F->getParent()->getConstants()) {
45 if (var->getOutput().getElementType() != ElemKind::FloatTy) {
46 continue;
47 }
48 nodesToInstrument.insert(var->getOutput());
49 }
50
51 // Add Quantization Profile node to all floating point placeholders.
52 for (const auto &PH : F->getParent()->getPlaceholders()) {
53 if (PH->getOutput().getElementType() != ElemKind::FloatTy) {
54 continue;
55 }
56
57 /// Don't profile output nodes.
58 if (!PH->getUsers().empty()) {
59 auto *SN = llvm::dyn_cast<SaveNode>(PH->getUsers().begin()->getUser());
60 if (SN) {
61 continue;
62 }
63 }
64 nodesToInstrument.insert(PH->getOutput());
65 }
66
67 for (const auto &NV : nodesToInstrument) {
68 F->createQuantizationProfile(bindings,
69 "QP_" + NV.getNode()->getName().str(), NV,
70 profConfig.numHistogramBins);
71 }
72}
73