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1 //===- Timer.cpp ----------------------------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "lld/Common/Timer.h"
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10 #include "lld/Common/ErrorHandler.h"
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11 #include "llvm/Support/Format.h"
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12
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13 using namespace lld;
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14 using namespace llvm;
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15
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173
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16 ScopedTimer::ScopedTimer(Timer &t) : t(&t) {
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17 startTime = std::chrono::high_resolution_clock::now();
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18 }
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19
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20 void ScopedTimer::stop() {
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21 if (!t)
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22 return;
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23 t->addToTotal(std::chrono::high_resolution_clock::now() - startTime);
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24 t = nullptr;
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25 }
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26
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27 ScopedTimer::~ScopedTimer() { stop(); }
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28
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173
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29 Timer::Timer(llvm::StringRef name) : name(std::string(name)) {}
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30 Timer::Timer(llvm::StringRef name, Timer &parent) : name(std::string(name)) {
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31 parent.children.push_back(this);
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150
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32 }
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33
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34 Timer &Timer::root() {
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35 static Timer rootTimer("Total Link Time");
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36 return rootTimer;
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37 }
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38
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39 void Timer::print() {
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40 double totalDuration = static_cast<double>(root().millis());
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41
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42 // We want to print the grand total under all the intermediate phases, so we
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43 // print all children first, then print the total under that.
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44 for (const auto &child : children)
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173
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45 if (child->total > 0)
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46 child->print(1, totalDuration);
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47
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207
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48 message(std::string(50, '-'));
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49
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50 root().print(0, root().millis(), false);
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51 }
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52
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53 double Timer::millis() const {
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54 return std::chrono::duration_cast<std::chrono::duration<double, std::milli>>(
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173
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55 std::chrono::nanoseconds(total))
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150
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56 .count();
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57 }
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58
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59 void Timer::print(int depth, double totalDuration, bool recurse) const {
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60 double p = 100.0 * millis() / totalDuration;
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61
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62 SmallString<32> str;
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63 llvm::raw_svector_ostream stream(str);
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64 std::string s = std::string(depth * 2, ' ') + name + std::string(":");
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65 stream << format("%-30s%7d ms (%5.1f%%)", s.c_str(), (int)millis(), p);
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66
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67 message(str);
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68
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69 if (recurse) {
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70 for (const auto &child : children)
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173
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71 if (child->total > 0)
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72 child->print(depth + 1, totalDuration);
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150
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73 }
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74 }
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