1 //===-- Timer.cpp - Interval Timing Support -------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Interval Timing implementation.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Support/Timer.h"
15 #include "llvm/ADT/OwningPtr.h"
16 #include "llvm/ADT/StringMap.h"
17 #include "llvm/Support/CommandLine.h"
18 #include "llvm/Support/Debug.h"
19 #include "llvm/Support/Format.h"
20 #include "llvm/Support/ManagedStatic.h"
21 #include "llvm/Support/Mutex.h"
22 #include "llvm/Support/Process.h"
23 #include "llvm/Support/raw_ostream.h"
26 // CreateInfoOutputFile - Return a file stream to print our output on.
27 namespace llvm { extern raw_ostream *CreateInfoOutputFile(); }
29 // getLibSupportInfoOutputFilename - This ugly hack is brought to you courtesy
30 // of constructor/destructor ordering being unspecified by C++. Basically the
31 // problem is that a Statistic object gets destroyed, which ends up calling
32 // 'GetLibSupportInfoOutputFile()' (below), which calls this function.
33 // LibSupportInfoOutputFilename used to be a global variable, but sometimes it
34 // would get destroyed before the Statistic, causing havoc to ensue. We "fix"
35 // this by creating the string the first time it is needed and never destroying
37 static ManagedStatic<std::string> LibSupportInfoOutputFilename;
38 static std::string &getLibSupportInfoOutputFilename() {
39 return *LibSupportInfoOutputFilename;
42 static ManagedStatic<sys::SmartMutex<true> > TimerLock;
46 TrackSpace("track-memory", cl::desc("Enable -time-passes memory "
47 "tracking (this may be slow)"),
50 static cl::opt<std::string, true>
51 InfoOutputFilename("info-output-file", cl::value_desc("filename"),
52 cl::desc("File to append -stats and -timer output to"),
53 cl::Hidden, cl::location(getLibSupportInfoOutputFilename()));
56 // CreateInfoOutputFile - Return a file stream to print our output on.
57 raw_ostream *llvm::CreateInfoOutputFile() {
58 const std::string &OutputFilename = getLibSupportInfoOutputFilename();
59 if (OutputFilename.empty())
60 return new raw_fd_ostream(2, false); // stderr.
61 if (OutputFilename == "-")
62 return new raw_fd_ostream(1, false); // stdout.
64 // Append mode is used because the info output file is opened and closed
65 // each time -stats or -time-passes wants to print output to it. To
66 // compensate for this, the test-suite Makefiles have code to delete the
67 // info output file before running commands which write to it.
69 raw_ostream *Result = new raw_fd_ostream(OutputFilename.c_str(),
70 Error, raw_fd_ostream::F_Append);
74 errs() << "Error opening info-output-file '"
75 << OutputFilename << " for appending!\n";
77 return new raw_fd_ostream(2, false); // stderr.
81 static TimerGroup *DefaultTimerGroup = 0;
82 static TimerGroup *getDefaultTimerGroup() {
83 TimerGroup *tmp = DefaultTimerGroup;
87 llvm_acquire_global_lock();
88 tmp = DefaultTimerGroup;
90 tmp = new TimerGroup("Miscellaneous Ungrouped Timers");
92 DefaultTimerGroup = tmp;
94 llvm_release_global_lock();
99 //===----------------------------------------------------------------------===//
100 // Timer Implementation
101 //===----------------------------------------------------------------------===//
103 void Timer::init(StringRef N) {
104 assert(TG == 0 && "Timer already initialized");
105 Name.assign(N.begin(), N.end());
107 TG = getDefaultTimerGroup();
111 void Timer::init(StringRef N, TimerGroup &tg) {
112 assert(TG == 0 && "Timer already initialized");
113 Name.assign(N.begin(), N.end());
120 if (!TG) return; // Never initialized, or already cleared.
121 TG->removeTimer(*this);
124 static inline size_t getMemUsage() {
125 if (!TrackSpace) return 0;
126 return sys::Process::GetMallocUsage();
129 TimeRecord TimeRecord::getCurrentTime(bool Start) {
131 sys::TimeValue now(0,0), user(0,0), sys(0,0);
134 Result.MemUsed = getMemUsage();
135 sys::Process::GetTimeUsage(now, user, sys);
137 sys::Process::GetTimeUsage(now, user, sys);
138 Result.MemUsed = getMemUsage();
141 Result.WallTime = now.seconds() + now.microseconds() / 1000000.0;
142 Result.UserTime = user.seconds() + user.microseconds() / 1000000.0;
143 Result.SystemTime = sys.seconds() + sys.microseconds() / 1000000.0;
147 static ManagedStatic<std::vector<Timer*> > ActiveTimers;
149 void Timer::startTimer() {
151 ActiveTimers->push_back(this);
152 Time -= TimeRecord::getCurrentTime(true);
155 void Timer::stopTimer() {
156 Time += TimeRecord::getCurrentTime(false);
158 if (ActiveTimers->back() == this) {
159 ActiveTimers->pop_back();
161 std::vector<Timer*>::iterator I =
162 std::find(ActiveTimers->begin(), ActiveTimers->end(), this);
163 assert(I != ActiveTimers->end() && "stop but no startTimer?");
164 ActiveTimers->erase(I);
168 static void printVal(double Val, double Total, raw_ostream &OS) {
169 if (Total < 1e-7) // Avoid dividing by zero.
172 OS << format(" %7.4f (%5.1f%%)", Val, Val*100/Total);
175 void TimeRecord::print(const TimeRecord &Total, raw_ostream &OS) const {
176 if (Total.getUserTime())
177 printVal(getUserTime(), Total.getUserTime(), OS);
178 if (Total.getSystemTime())
179 printVal(getSystemTime(), Total.getSystemTime(), OS);
180 if (Total.getProcessTime())
181 printVal(getProcessTime(), Total.getProcessTime(), OS);
182 printVal(getWallTime(), Total.getWallTime(), OS);
186 if (Total.getMemUsed())
187 OS << format("%9" PRId64 " ", (int64_t)getMemUsed());
191 //===----------------------------------------------------------------------===//
192 // NamedRegionTimer Implementation
193 //===----------------------------------------------------------------------===//
197 typedef StringMap<Timer> Name2TimerMap;
200 StringMap<std::pair<TimerGroup*, Name2TimerMap> > Map;
203 for (StringMap<std::pair<TimerGroup*, Name2TimerMap> >::iterator
204 I = Map.begin(), E = Map.end(); I != E; ++I)
205 delete I->second.first;
208 Timer &get(StringRef Name, StringRef GroupName) {
209 sys::SmartScopedLock<true> L(*TimerLock);
211 std::pair<TimerGroup*, Name2TimerMap> &GroupEntry = Map[GroupName];
213 if (!GroupEntry.first)
214 GroupEntry.first = new TimerGroup(GroupName);
216 Timer &T = GroupEntry.second[Name];
217 if (!T.isInitialized())
218 T.init(Name, *GroupEntry.first);
225 static ManagedStatic<Name2TimerMap> NamedTimers;
226 static ManagedStatic<Name2PairMap> NamedGroupedTimers;
228 static Timer &getNamedRegionTimer(StringRef Name) {
229 sys::SmartScopedLock<true> L(*TimerLock);
231 Timer &T = (*NamedTimers)[Name];
232 if (!T.isInitialized())
237 NamedRegionTimer::NamedRegionTimer(StringRef Name,
239 : TimeRegion(!Enabled ? 0 : &getNamedRegionTimer(Name)) {}
241 NamedRegionTimer::NamedRegionTimer(StringRef Name, StringRef GroupName,
243 : TimeRegion(!Enabled ? 0 : &NamedGroupedTimers->get(Name, GroupName)) {}
245 //===----------------------------------------------------------------------===//
246 // TimerGroup Implementation
247 //===----------------------------------------------------------------------===//
249 /// TimerGroupList - This is the global list of TimerGroups, maintained by the
250 /// TimerGroup ctor/dtor and is protected by the TimerLock lock.
251 static TimerGroup *TimerGroupList = 0;
253 TimerGroup::TimerGroup(StringRef name)
254 : Name(name.begin(), name.end()), FirstTimer(0) {
256 // Add the group to TimerGroupList.
257 sys::SmartScopedLock<true> L(*TimerLock);
259 TimerGroupList->Prev = &Next;
260 Next = TimerGroupList;
261 Prev = &TimerGroupList;
262 TimerGroupList = this;
265 TimerGroup::~TimerGroup() {
266 // If the timer group is destroyed before the timers it owns, accumulate and
267 // print the timing data.
268 while (FirstTimer != 0)
269 removeTimer(*FirstTimer);
271 // Remove the group from the TimerGroupList.
272 sys::SmartScopedLock<true> L(*TimerLock);
279 void TimerGroup::removeTimer(Timer &T) {
280 sys::SmartScopedLock<true> L(*TimerLock);
282 // If the timer was started, move its data to TimersToPrint.
284 TimersToPrint.push_back(std::make_pair(T.Time, T.Name));
288 // Unlink the timer from our list.
291 T.Next->Prev = T.Prev;
293 // Print the report when all timers in this group are destroyed if some of
294 // them were started.
295 if (FirstTimer != 0 || TimersToPrint.empty())
298 raw_ostream *OutStream = CreateInfoOutputFile();
299 PrintQueuedTimers(*OutStream);
300 delete OutStream; // Close the file.
303 void TimerGroup::addTimer(Timer &T) {
304 sys::SmartScopedLock<true> L(*TimerLock);
306 // Add the timer to our list.
308 FirstTimer->Prev = &T.Next;
310 T.Prev = &FirstTimer;
314 void TimerGroup::PrintQueuedTimers(raw_ostream &OS) {
315 // Sort the timers in descending order by amount of time taken.
316 std::sort(TimersToPrint.begin(), TimersToPrint.end());
319 for (unsigned i = 0, e = TimersToPrint.size(); i != e; ++i)
320 Total += TimersToPrint[i].first;
322 // Print out timing header.
323 OS << "===" << std::string(73, '-') << "===\n";
324 // Figure out how many spaces to indent TimerGroup name.
325 unsigned Padding = (80-Name.length())/2;
326 if (Padding > 80) Padding = 0; // Don't allow "negative" numbers
327 OS.indent(Padding) << Name << '\n';
328 OS << "===" << std::string(73, '-') << "===\n";
330 // If this is not an collection of ungrouped times, print the total time.
331 // Ungrouped timers don't really make sense to add up. We still print the
332 // TOTAL line to make the percentages make sense.
333 if (this != DefaultTimerGroup)
334 OS << format(" Total Execution Time: %5.4f seconds (%5.4f wall clock)\n",
335 Total.getProcessTime(), Total.getWallTime());
338 if (Total.getUserTime())
339 OS << " ---User Time---";
340 if (Total.getSystemTime())
341 OS << " --System Time--";
342 if (Total.getProcessTime())
343 OS << " --User+System--";
344 OS << " ---Wall Time---";
345 if (Total.getMemUsed())
347 OS << " --- Name ---\n";
349 // Loop through all of the timing data, printing it out.
350 for (unsigned i = 0, e = TimersToPrint.size(); i != e; ++i) {
351 const std::pair<TimeRecord, std::string> &Entry = TimersToPrint[e-i-1];
352 Entry.first.print(Total, OS);
353 OS << Entry.second << '\n';
356 Total.print(Total, OS);
360 TimersToPrint.clear();
363 /// print - Print any started timers in this group and zero them.
364 void TimerGroup::print(raw_ostream &OS) {
365 sys::SmartScopedLock<true> L(*TimerLock);
367 // See if any of our timers were started, if so add them to TimersToPrint and
369 for (Timer *T = FirstTimer; T; T = T->Next) {
370 if (!T->Started) continue;
371 TimersToPrint.push_back(std::make_pair(T->Time, T->Name));
373 // Clear out the time.
375 T->Time = TimeRecord();
378 // If any timers were started, print the group.
379 if (!TimersToPrint.empty())
380 PrintQueuedTimers(OS);
383 /// printAll - This static method prints all timers and clears them all out.
384 void TimerGroup::printAll(raw_ostream &OS) {
385 sys::SmartScopedLock<true> L(*TimerLock);
387 for (TimerGroup *TG = TimerGroupList; TG; TG = TG->Next)