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 _GLIBCXX_PERFORMANCE_H
  32 #define _GLIBCXX_PERFORMANCE_H
  33
  34 #include <sys/times.h>
  35 #include <sys/resource.h>
  36 #include <cstdlib>
  37 #include <string>
  38 #include <fstream>
  39 #include <iomanip>
  40
  41 #ifdef __linux__
  42 #include <malloc.h>
  43 #else
  44 extern "C"
  45 {
  46   struct mallinfo { int uordblks; };
  47   struct mallinfo empty = { 0 };
  48   struct mallinfo mallinfo(void) { return empty; }
  49 }
  50 #endif
  51
  52 namespace __gnu_cxx_test
  53 {
  54   class time_counter
  55   {
  56     clock_t     elapsed_begin;
  57     clock_t     elapsed_end;
  58     tms         tms_begin;
  59     tms         tms_end;
  60
  61   public:
  62     time_counter()
  63     { this->clear(); }
  64
  65     void
  66     clear()
  67     {
  68       elapsed_begin = 0;
  69       elapsed_end = 0;
  70       memset(&tms_begin, 0, sizeof(tms));
  71       memset(&tms_end, 0, sizeof(tms));
  72     }
  73
  74     void
  75     start()
  76     { elapsed_begin = times(&tms_begin); }
  77
  78     void
  79     stop()
  80     { elapsed_end = times(&tms_end); }
  81
  82     size_t
  83     real_time() const
  84     { return elapsed_end - elapsed_begin; }
  85
  86     size_t
  87     user_time() const
  88     { return tms_end.tms_utime - tms_begin.tms_utime; }
  89
  90     size_t
  91     system_time() const
  92     { return tms_end.tms_stime - tms_begin.tms_stime; }
  93   };
  94
  95   class resource_counter
  96   {
  97     int         who;
  98     rusage      rusage_begin;
  99     rusage      rusage_end;
 100     struct mallinfo     allocation_begin;
 101     struct mallinfo     allocation_end;
 102
 103   public:
 104     resource_counter(int i = RUSAGE_SELF) : who(i)
 105     { this->clear(); }
 106
 107     void
 108     clear()
 109     {
 110       memset(&rusage_begin, 0, sizeof(rusage_begin));
 111       memset(&rusage_end, 0, sizeof(rusage_end));
 112       memset(&allocation_begin, 0, sizeof(allocation_begin));
 113       memset(&allocation_end, 0, sizeof(allocation_end));
 114     }
 115
 116     void
 117     start()
 118     {
 119       if (getrusage(who, &rusage_begin) != 0 )
 120         memset(&rusage_begin, 0, sizeof(rusage_begin));
 121       malloc(0); // Needed for some implementations.
 122       allocation_begin = mallinfo();
 123     }
 124
 125     void
 126     stop()
 127     {
 128       if (getrusage(who, &rusage_end) != 0 )
 129         memset(&rusage_end, 0, sizeof(rusage_end));
 130       allocation_end = mallinfo();
 131     }
 132
 133     int
 134     allocated_memory() const
 135     { return allocation_end.uordblks - allocation_begin.uordblks; }
 136
 137     long
 138     hard_page_fault() const
 139     { return rusage_end.ru_majflt - rusage_begin.ru_majflt; }
 140
 141     long
 142     swapped() const
 143     { return rusage_end.ru_nswap - rusage_begin.ru_nswap; }
 144   };
 145
 146   void
 147   start_counters(time_counter& t, resource_counter& r)
 148   {
 149     t.start();
 150     r.start();
 151   }
 152
 153   void
 154   stop_counters(time_counter& t, resource_counter& r)
 155   {
 156     t.stop();
 157     r.stop();
 158   }
 159
 160   void
 161   clear_counters(time_counter& t, resource_counter& r)
 162   {
 163     t.clear();
 164     r.clear();
 165   }
 166
 167   void
 168   report_performance(const std::string file, const std::string comment,
 169                      const time_counter& t, const resource_counter& r)
 170   {
 171     const char space = ' ';
 172     const char tab = '\t';
 173     const char* name = "libstdc++-v3-performance.sum";
 174     std::string::const_iterator i = file.begin() + file.find_last_of('/') + 1;
 175     std::string testname(i, file.end());
 176
 177     std::ofstream out(name, std::ios_base::app);
 178
 179     out.setf(std::ios_base::left);
 180     out << std::setw(25) << testname << tab;
 181     out << std::setw(10) << comment << tab;
 182
 183     out.setf(std::ios_base::right);
 184     out << std::setw(4) << t.real_time() << "r" << space;
 185     out << std::setw(4) << t.user_time() << "u" << space;
 186     out << std::setw(4) << t.system_time() << "s" << space;
 187     out << std::setw(4) << r.allocated_memory() << "mem" << space;
 188     out << std::setw(4) << r.hard_page_fault() << "pf" << space;
 189
 190     out << std::endl;
 191     out.close();
 192   }
 193 }; // namespace __gnu_cxx_test
 194
 195 #endif // _GLIBCXX_PERFORMANCE_H
 196