libstdc++-v3/testsuite/testsuite_performance.h

   1 // -*- C++ -*-
   2 // Testing performance utilities for the C++ library testsuite.
   3 //
   4 // Copyright (C) 2003 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  20 // USA.
  21 //
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 #ifndef _GLIBCPP_PERFORMANCE_H
  32 #define _GLIBCPP_PERFORMANCE_H
  33
  34 #include <sys/times.h>
  35 #include <sys/resource.h>
  36 #include <malloc.h>
  37 #include <string>
  38 #include <fstream>
  39 #include <iomanip>
  40
  41 namespace __gnu_cxx_test
  42 {
  43   class time_counter
  44   {
  45     clock_t     elapsed_begin;
  46     clock_t     elapsed_end;
  47     tms         tms_begin;
  48     tms         tms_end;
  49
  50   public:
  51     time_counter()
  52     { this->clear(); }
  53
  54     void
  55     clear()
  56     {
  57       elapsed_begin = 0;
  58       elapsed_end = 0;
  59       memset(&tms_begin, 0, sizeof(tms));
  60       memset(&tms_end, 0, sizeof(tms));
  61     }
  62
  63     void
  64     start()
  65     { elapsed_begin = times(&tms_begin); }
  66
  67     void
  68     stop()
  69     { elapsed_end = times(&tms_end); }
  70
  71     size_t
  72     real_time() const
  73     { return elapsed_end - elapsed_begin; }
  74
  75     size_t
  76     user_time() const
  77     { return tms_end.tms_utime - tms_begin.tms_utime; }
  78
  79     size_t
  80     system_time() const
  81     { return tms_end.tms_stime - tms_begin.tms_stime; }
  82   };
  83
  84   class resource_counter
  85   {
  86     int         who;
  87     rusage      rusage_begin;
  88     rusage      rusage_end;
  89     struct mallinfo     allocation_begin;
  90     struct mallinfo     allocation_end;
  91
  92   public:
  93     resource_counter(int i = RUSAGE_SELF) : who(i)
  94     { this->clear(); }
  95
  96     void
  97     clear()
  98     {
  99       memset(&rusage_begin, 0, sizeof(rusage_begin));
 100       memset(&rusage_end, 0, sizeof(rusage_end));
 101       memset(&allocation_begin, 0, sizeof(allocation_begin));
 102       memset(&allocation_end, 0, sizeof(allocation_end));
 103     }
 104
 105     void
 106     start()
 107     {
 108       if (getrusage(who, &rusage_begin) != 0 )
 109         memset(&rusage_begin, 0, sizeof(rusage_begin));
 110       // allocation_begin = mallinfo();
 111     }
 112
 113     void
 114     stop()
 115     {
 116       if (getrusage(who, &rusage_end) != 0 )
 117         memset(&rusage_end, 0, sizeof(rusage_end));
 118       // allocation_end = mallinfo();
 119     }
 120
 121     int
 122     allocated_memory() const
 123     { return allocation_end.arena - allocation_begin.arena; }
 124
 125     long
 126     hard_page_fault() const
 127     { return rusage_end.ru_majflt - rusage_begin.ru_majflt; }
 128
 129     long
 130     swapped() const
 131     { return rusage_end.ru_nswap - rusage_begin.ru_nswap; }
 132   };
 133
 134   void
 135   start_counters(time_counter& t, resource_counter& r)
 136   {
 137     t.start();
 138     r.start();
 139   }
 140
 141   void
 142   stop_counters(time_counter& t, resource_counter& r)
 143   {
 144     t.stop();
 145     r.stop();
 146   }
 147
 148   void
 149   clear_counters(time_counter& t, resource_counter& r)
 150   {
 151     t.clear();
 152     r.clear();
 153   }
 154
 155   void
 156   report_performance(const std::string file, const std::string comment,
 157                      const time_counter& t, const resource_counter& r)
 158   {
 159     const char space = ' ';
 160     const char tab = '\t';
 161     const char* name = "libstdc++-v3.performance";
 162     std::string::const_iterator i = file.begin() + file.find_last_of('/') + 1;
 163     std::string testname(i, file.end());
 164
 165     std::ofstream out(name, std::ios_base::app);
 166
 167     out.setf(std::ios_base::left);
 168     out << std::setw(25) << testname << tab;
 169     out << std::setw(10) << comment << tab;
 170
 171     out.setf(std::ios_base::right);
 172     out << std::setw(4) << t.real_time() << "r" << space;
 173     out << std::setw(4) << t.user_time() << "u" << space;
 174     out << std::setw(4) << t.system_time() << "s" << space;
 175     //    out << std::setw(4) << r.allocated_memory() << "mem" << space;
 176     out << std::setw(4) << r.hard_page_fault() << "pf" << space;
 177
 178     out << std::endl;
 179     out.close();
 180   }
 181 }; // namespace __gnu_cxx_test
 182
 183 #endif // _GLIBCPP_PERFORMANCE_H
 184