source/debug/profiler.cpp

   1 #include <msp/core/maputils.h>
   2 #include <msp/time/units.h>
   3 #include "profiler.h"
   4
   5 using namespace std;
   6
   7 namespace Msp {
   8 namespace Debug {
   9
  10 Profiler::Profiler():
  11         period(0),
  12         inner(0)
  13 { }
  14
  15 void Profiler::set_period(unsigned p)
  16 {
  17         if(p==period)
  18                 return;
  19
  20         period = p;
  21         for(map<string, ScopeInfo>::iterator i=scopes.begin(); i!=scopes.end(); ++i)
  22         {
  23                 ScopeInfo &si = i->second;
  24                 if(p==0)
  25                         si.history.clear();
  26                 else
  27                         si.history.assign(period, Time::zero);
  28                 si.hist_pos = 0;
  29         }
  30 }
  31
  32 void Profiler::add_scope(const std::string &name)
  33 {
  34         if(!scopes.count(name))
  35         {
  36                 map<string, ScopeInfo>::iterator i = scopes.insert(map<string, ScopeInfo>::value_type(name, ScopeInfo())).first;
  37                 i->second.history.resize(period);
  38         }
  39 }
  40
  41 ProfilingScope *Profiler::enter(ProfilingScope *ps)
  42 {
  43         ProfilingScope *old = inner;
  44         inner = ps;
  45         return old;
  46 }
  47
  48 void Profiler::record(const string &scope_name, const string &parent, const Time::TimeDelta &time, const Time::TimeDelta &child_t)
  49 {
  50         map<string, ScopeInfo>::iterator i = scopes.find(scope_name);
  51         if(i==scopes.end())
  52         {
  53                 i = scopes.insert(map<string, ScopeInfo>::value_type(scope_name, ScopeInfo())).first;
  54                 i->second.history.resize(period);
  55         }
  56
  57         ScopeInfo &si = i->second;
  58         ++si.calls;
  59         ++si.called_from[parent];
  60         si.total_time += time;
  61         si.self_time += time-child_t;
  62         if(period)
  63         {
  64                 si.avg_time += time/period-si.history[si.hist_pos]/period;
  65                 si.history[si.hist_pos++] = time;
  66                 if(si.hist_pos>=period)
  67                         si.hist_pos -= period;
  68         }
  69         else
  70                 si.avg_time = si.total_time/si.calls;
  71 }
  72
  73 const Profiler::ScopeInfo &Profiler::scope(const string &sn) const
  74 {
  75         return get_item(scopes, sn);
  76 }
  77
  78
  79 Profiler::ScopeInfo::ScopeInfo():
  80         calls(0),
  81         hist_pos(0)
  82 { }
  83
  84 } // namespace Debug
  85 } // namespace Msp