73 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9#include "lld/Common/Timer.h"10#include "lld/Common/ErrorHandler.h"11#include "llvm/ADT/SmallString.h"12#include "llvm/Support/Format.h"13#include <ratio>14 15using namespace lld;16using namespace llvm;17 18ScopedTimer::ScopedTimer(Timer &t) : t(&t) {19 startTime = std::chrono::high_resolution_clock::now();20}21 22void ScopedTimer::stop() {23 if (!t)24 return;25 t->addToTotal(std::chrono::high_resolution_clock::now() - startTime);26 t = nullptr;27}28 29ScopedTimer::~ScopedTimer() { stop(); }30 31Timer::Timer(llvm::StringRef name) : total(0), name(std::string(name)) {}32Timer::Timer(llvm::StringRef name, Timer &parent)33 : total(0), name(std::string(name)) {34 parent.children.push_back(this);35}36 37void Timer::print() {38 double totalDuration = static_cast<double>(millis());39 40 // We want to print the grand total under all the intermediate phases, so we41 // print all children first, then print the total under that.42 for (const auto &child : children)43 if (child->total > 0)44 child->print(1, totalDuration);45 46 message(std::string(50, '-'));47 48 print(0, millis(), false);49}50 51double Timer::millis() const {52 return std::chrono::duration_cast<std::chrono::duration<double, std::milli>>(53 std::chrono::nanoseconds(total))54 .count();55}56 57void Timer::print(int depth, double totalDuration, bool recurse) const {58 double p = 100.0 * millis() / totalDuration;59 60 SmallString<32> str;61 llvm::raw_svector_ostream stream(str);62 std::string s = std::string(depth * 2, ' ') + name + std::string(":");63 stream << format("%-30s%7d ms (%5.1f%%)", s.c_str(), (int)millis(), p);64 65 message(str);66 67 if (recurse) {68 for (const auto &child : children)69 if (child->total > 0)70 child->print(depth + 1, totalDuration);71 }72}73