CGII/framework/include/cgv/utils/profiler.h

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2018-05-17 14:01:02 +00:00
#ifndef PROFILER_H
#define PROFILER_H
#include <map>
#include <vector>
#include <ctime>
#include <cgv/utils/stopwatch.h>
#include <iostream>
#include <string>
namespace cgv {
namespace utils{
/**
* A profiler class for managing different stopwatches.
*
* Example:
*
* Profiler<> p;
*
* p.prepare_counter("all");
* p.prepare_counter("graphics");
* p.prepare_counter("simulation");
*
* ...
* while(not_stopped)
* {
* stopwatch sa(p.get_time_accu("all"));
* {
* stopwatch ss(p.get_time_accu("simulation"));
* simulate();
* }
* {
* stopwatch sr(p.get_time_accu("graphics"));
* render();
* }
* }
* ...
* std::cout << p;
*/
template< typename T = std::string>
class Profiler
{
std::map<T,double> counter_times;
std::map<T,int> counter_calls;
public:
void prepare_counter(const T &handle)
{
counter_times[handle]=0.0;
counter_calls[handle]=0;
}
inline double *get_time_accu(const T handle)
{
counter_calls[handle]++;
return &(counter_times[handle]);
}
void zero_counters()
{
for(std::map<T,double>::iterator it = counter_times.begin();
it != counter_times.end();it++)
{
it->second=0;
counter_calls[it->first]=0;
}
}
friend std::ostream& operator<< (std::ostream& out, Profiler p)
{
for(std::map<T,double>::iterator it = p.counter_times.begin();
it != p.counter_times.end();it++)
{
out << it->first << ": "<< p.counter_calls[it->first] << " calls, "<<it->second << " sec, "
<< it->second/p.counter_calls[it->first] << " sec/call (mean)"<< std::endl;
}
return out;
}
};
}
}
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#endif// PROFILER_H