1 //===- Timer.h ----------------------------------------------*- C++ -*-===// 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 #ifndef LLD_COMMON_TIMER_H 10 #define LLD_COMMON_TIMER_H 11 12 #include "llvm/ADT/DenseMap.h" 13 #include "llvm/ADT/StringRef.h" 14 #include <assert.h> 15 #include <atomic> 16 #include <chrono> 17 #include <map> 18 #include <memory> 19 #include <vector> 20 21 namespace lld { 22 23 class Timer; 24 25 struct ScopedTimer { 26 explicit ScopedTimer(Timer &t); 27 28 ~ScopedTimer(); 29 30 void stop(); 31 32 std::chrono::time_point<std::chrono::high_resolution_clock> startTime; 33 34 Timer *t = nullptr; 35 }; 36 37 class Timer { 38 public: 39 Timer(llvm::StringRef name, Timer &parent); 40 41 // Creates the root timer. 42 explicit Timer(llvm::StringRef name); 43 addToTotal(std::chrono::nanoseconds time)44 void addToTotal(std::chrono::nanoseconds time) { total += time.count(); } 45 void print(); 46 47 double millis() const; 48 49 private: 50 void print(int depth, double totalDuration, bool recurse = true) const; 51 52 std::atomic<std::chrono::nanoseconds::rep> total; 53 std::vector<Timer *> children; 54 std::string name; 55 }; 56 57 } // namespace lld 58 59 #endif 60