1 #include "lld/Common/Timer.h" 2 #include "lld/Common/ErrorHandler.h" 3 #include "llvm/Support/Format.h" 4 5 using namespace lld; 6 using namespace llvm; 7 8 ScopedTimer::ScopedTimer(Timer &T) : T(&T) { T.start(); } 9 10 void ScopedTimer::stop() { 11 if (!T) 12 return; 13 T->stop(); 14 T = nullptr; 15 } 16 17 ScopedTimer::~ScopedTimer() { stop(); } 18 19 Timer::Timer(llvm::StringRef Name) : Name(Name), Parent(nullptr) {} 20 Timer::Timer(llvm::StringRef Name, Timer &Parent) 21 : Name(Name), Parent(&Parent) {} 22 23 void Timer::start() { 24 if (Parent && Total.count() == 0) 25 Parent->Children.push_back(this); 26 StartTime = std::chrono::high_resolution_clock::now(); 27 } 28 29 void Timer::stop() { 30 Total += (std::chrono::high_resolution_clock::now() - StartTime); 31 } 32 33 Timer &Timer::root() { 34 static Timer RootTimer("Total Link Time"); 35 return RootTimer; 36 } 37 38 void Timer::print() { 39 double TotalDuration = static_cast<double>(root().millis()); 40 41 // We want to print the grand total under all the intermediate phases, so we 42 // print all children first, then print the total under that. 43 for (const auto &Child : Children) 44 Child->print(1, TotalDuration); 45 46 message(std::string(49, '-')); 47 48 root().print(0, root().millis(), false); 49 } 50 51 double Timer::millis() const { 52 return std::chrono::duration_cast<std::chrono::duration<double, std::milli>>( 53 Total) 54 .count(); 55 } 56 57 void 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%5d ms (%5.1f%%)", S.c_str(), (int)millis(), P); 64 65 message(Str); 66 67 if (Recurse) { 68 for (const auto &Child : Children) 69 Child->print(Depth + 1, TotalDuration); 70 } 71 } 72