source/debug/profiler.cpp

   1 /* $Id$
   2
   3 This file is part of libmspcore
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include "../core/except.h"
   9 #include "../time/units.h"
  10 #include "profiler.h"
  11
  12 using namespace std;
  13
  14 namespace Msp {
  15 namespace Debug {
  16
  17 Profiler::Profiler():
  18         period(0),
  19         inner(0)
  20 { }
  21
  22 void Profiler::set_period(unsigned p)
  23 {
  24         if(p==period)
  25                 return;
  26
  27         period=p;
  28         for(map<string, ScopeInfo>::iterator i=scopes.begin(); i!=scopes.end(); ++i)
  29         {
  30                 ScopeInfo &si=i->second;
  31                 if(p==0)
  32                         si.history.clear();
  33                 else
  34                         si.history.assign(period, Time::zero);
  35                 si.hist_pos=0;
  36         }
  37 }
  38
  39 void Profiler::add_scope(const std::string &name)
  40 {
  41         if(!scopes.count(name))
  42         {
  43                 map<string, ScopeInfo>::iterator i=scopes.insert(map<string, ScopeInfo>::value_type(name, ScopeInfo())).first;
  44                 i->second.history.resize(period);
  45         }
  46 }
  47
  48 ProfilingScope *Profiler::enter(ProfilingScope *ps)
  49 {
  50         ProfilingScope *old=inner;
  51         inner=ps;
  52         return old;
  53 }
  54
  55 void Profiler::record(const string &scope_name, const string &parent, const Time::TimeDelta &time, const Time::TimeDelta &child_t)
  56 {
  57         map<string, ScopeInfo>::iterator i=scopes.find(scope_name);
  58         if(i==scopes.end())
  59         {
  60                 i=scopes.insert(map<string, ScopeInfo>::value_type(scope_name, ScopeInfo())).first;
  61                 i->second.history.resize(period);
  62         }
  63
  64         ScopeInfo &si=i->second;
  65         ++si.calls;
  66         ++si.called_from[parent];
  67         si.total_time+=time;
  68         si.self_time+=time-child_t;
  69         if(period)
  70         {
  71                 si.avg_time+=(time-si.history[si.hist_pos])/period;
  72                 si.history[si.hist_pos++]=time;
  73                 if(si.hist_pos>=period)
  74                         si.hist_pos-=period;
  75         }
  76         else
  77                 si.avg_time=si.total_time/si.calls;
  78 }
  79
  80 const Profiler::ScopeInfo &Profiler::scope(const string &sn) const
  81 {
  82         map<string, ScopeInfo>::const_iterator i=scopes.find(sn);
  83         if(i==scopes.end())
  84                 throw KeyError("Unknown scope");
  85
  86         return i->second;
  87 }
  88
  89
  90 Profiler::ScopeInfo::ScopeInfo():
  91         calls(0),
  92         hist_pos(0)
  93 { }
  94
  95 } // namespace Debug
  96 } // namespace Msp