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//===-- Timer.cpp - Interval Timing Support -------------------------------===//
//
// Interval Timing implementation.
//
//===----------------------------------------------------------------------===//
#include "Support/Timer.h"
#include <sys/resource.h>
#include <sys/time.h>
#include <sys/unistd.h>
#include <unistd.h>
#include <malloc.h>
#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <functional>
static TimerGroup *DefaultTimerGroup = 0;
static TimerGroup *getDefaultTimerGroup() {
if (DefaultTimerGroup) return DefaultTimerGroup;
return DefaultTimerGroup = new TimerGroup("Miscellaneous Ungrouped Timers");
}
Timer::Timer(const std::string &N)
: Elapsed(0), UserTime(0), SystemTime(0), MaxRSS(0), Name(N),
Started(false), TG(getDefaultTimerGroup()) {
TG->addTimer();
}
Timer::Timer(const std::string &N, TimerGroup &tg)
: Elapsed(0), UserTime(0), SystemTime(0), MaxRSS(0), Name(N),
Started(false), TG(&tg) {
TG->addTimer();
}
Timer::Timer(const Timer &T) {
TG = T.TG;
if (TG) TG->addTimer();
operator=(T);
}
// Copy ctor, initialize with no TG member.
Timer::Timer(bool, const Timer &T) {
TG = T.TG; // Avoid assertion in operator=
operator=(T); // Copy contents
TG = 0;
}
Timer::~Timer() {
if (TG) {
if (Started) {
Started = false;
TG->addTimerToPrint(*this);
}
TG->removeTimer();
}
}
struct TimeRecord {
double Elapsed, UserTime, SystemTime;
unsigned long MaxRSS;
};
static TimeRecord getTimeRecord() {
struct rusage RU;
struct timeval T;
gettimeofday(&T, 0);
if (getrusage(RUSAGE_SELF, &RU)) {
perror("getrusage call failed: -time-passes info incorrect!");
}
struct mallinfo MI = mallinfo();
TimeRecord Result;
Result.Elapsed = T.tv_sec + T.tv_usec/1000000.0;
Result.UserTime = RU.ru_utime.tv_sec + RU.ru_utime.tv_usec/1000000.0;
Result.SystemTime = RU.ru_stime.tv_sec + RU.ru_stime.tv_usec/1000000.0;
Result.MaxRSS = MI.uordblks+MI.usmblks;
return Result;
}
void Timer::startTimer() {
Started = true;
TimeRecord TR = getTimeRecord();
Elapsed -= TR.Elapsed;
UserTime -= TR.UserTime;
SystemTime -= TR.SystemTime;
MaxRSS -= TR.MaxRSS;
}
void Timer::stopTimer() {
TimeRecord TR = getTimeRecord();
Elapsed += TR.Elapsed;
UserTime += TR.UserTime;
SystemTime += TR.SystemTime;
MaxRSS += TR.MaxRSS;
if ((signed long)MaxRSS < 0)
MaxRSS = 0;
}
void Timer::sum(const Timer &T) {
Elapsed += T.Elapsed;
UserTime += T.UserTime;
SystemTime += T.SystemTime;
MaxRSS += T.MaxRSS;
}
//===----------------------------------------------------------------------===//
// TimerGroup Implementation
//===----------------------------------------------------------------------===//
static void printVal(double Val, double Total) {
if (Total < 1e-7) // Avoid dividing by zero...
fprintf(stderr, " ----- ");
else
fprintf(stderr, " %7.4f (%5.1f%%)", Val, Val*100/Total);
}
void Timer::print(const Timer &Total) {
if (Total.UserTime)
printVal(UserTime, Total.UserTime);
if (Total.SystemTime)
printVal(SystemTime, Total.SystemTime);
if (Total.getProcessTime())
printVal(getProcessTime(), Total.getProcessTime());
printVal(Elapsed, Total.Elapsed);
fprintf(stderr, " ");
if (Total.MaxRSS)
fprintf(stderr, " %8ld ", MaxRSS);
std::cerr << Name << "\n";
Started = false; // Once printed, don't print again
}
void TimerGroup::removeTimer() {
if (--NumTimers == 0 && !TimersToPrint.empty()) { // Print timing report...
// Sort the timers in descending order by amount of time taken...
std::sort(TimersToPrint.begin(), TimersToPrint.end(),
std::greater<Timer>());
// Figure out how many spaces to indent TimerGroup name...
unsigned Padding = (80-Name.length())/2;
if (Padding > 80) Padding = 0; // Don't allow "negative" numbers
++NumTimers;
{ // Scope to contain Total timer... don't allow total timer to drop us to
// zero timers...
Timer Total("TOTAL");
for (unsigned i = 0, e = TimersToPrint.size(); i != e; ++i)
Total.sum(TimersToPrint[i]);
// Print out timing header...
std::cerr << "===" << std::string(73, '-') << "===\n"
<< std::string(Padding, ' ') << Name << "\n"
<< "===" << std::string(73, '-')
<< "===\n Total Execution Time: " << Total.getProcessTime()
<< " seconds (" << Total.getWallTime()
<< " wall clock)\n\n";
if (Total.UserTime)
std::cerr << " ---User Time---";
if (Total.SystemTime)
std::cerr << " --System Time--";
if (Total.getProcessTime())
std::cerr << " --User+System--";
std::cerr << " ---Wall Time---";
if (Total.getMaxRSS())
std::cerr << " ---Mem---";
std::cerr << " --- Name ---\n";
// Loop through all of the timing data, printing it out...
for (unsigned i = 0, e = TimersToPrint.size(); i != e; ++i)
TimersToPrint[i].print(Total);
Total.print(Total);
std::cerr << std::endl; // Flush output
}
--NumTimers;
TimersToPrint.clear();
}
// Delete default timer group!
if (NumTimers == 0 && this == DefaultTimerGroup) {
delete DefaultTimerGroup;
DefaultTimerGroup = 0;
}
}
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