1 //===- Timer.cpp ----------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "lld/Common/Timer.h"
10 #include "lld/Common/ErrorHandler.h"
11 #include "llvm/Support/Format.h"
12
13 using namespace lld;
14 using namespace llvm;
15
ScopedTimer(Timer & t)16 ScopedTimer::ScopedTimer(Timer &t) : t(&t) {
17 startTime = std::chrono::high_resolution_clock::now();
18 }
19
stop()20 void ScopedTimer::stop() {
21 if (!t)
22 return;
23 t->addToTotal(std::chrono::high_resolution_clock::now() - startTime);
24 t = nullptr;
25 }
26
~ScopedTimer()27 ScopedTimer::~ScopedTimer() { stop(); }
28
Timer(llvm::StringRef name)29 Timer::Timer(llvm::StringRef name) : name(std::string(name)) {}
Timer(llvm::StringRef name,Timer & parent)30 Timer::Timer(llvm::StringRef name, Timer &parent) : name(std::string(name)) {
31 parent.children.push_back(this);
32 }
33
root()34 Timer &Timer::root() {
35 static Timer rootTimer("Total Link Time");
36 return rootTimer;
37 }
38
print()39 void Timer::print() {
40 double totalDuration = static_cast<double>(root().millis());
41
42 // We want to print the grand total under all the intermediate phases, so we
43 // print all children first, then print the total under that.
44 for (const auto &child : children)
45 if (child->total > 0)
46 child->print(1, totalDuration);
47
48 message(std::string(49, '-'));
49
50 root().print(0, root().millis(), false);
51 }
52
millis() const53 double Timer::millis() const {
54 return std::chrono::duration_cast<std::chrono::duration<double, std::milli>>(
55 std::chrono::nanoseconds(total))
56 .count();
57 }
58
print(int depth,double totalDuration,bool recurse) const59 void Timer::print(int depth, double totalDuration, bool recurse) const {
60 double p = 100.0 * millis() / totalDuration;
61
62 SmallString<32> str;
63 llvm::raw_svector_ostream stream(str);
64 std::string s = std::string(depth * 2, ' ') + name + std::string(":");
65 stream << format("%-30s%5d ms (%5.1f%%)", s.c_str(), (int)millis(), p);
66
67 message(str);
68
69 if (recurse) {
70 for (const auto &child : children)
71 if (child->total > 0)
72 child->print(depth + 1, totalDuration);
73 }
74 }
75