gnu/dist/gcc4/libstdc++-v3/testsuite/testsuite_performance.h

   1 // -*- C++ -*-
   2 // Testing performance utilities for the C++ library testsuite.
   3 //
   4 // Copyright (C) 2003, 2004, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  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 #elif defined (__FreeBSD__)
  44 extern "C"
  45 {
  46   struct mallinfo
  47   {
  48     int uordblks;
  49     int hblkhd;
  50   };
  51
  52   struct mallinfo
  53   mallinfo(void)
  54   {
  55     struct mallinfo m = { (((size_t) sbrk (0) + 1023) / 1024), 0 };
  56     return m;
  57   }
  58 }
  59 #elif !defined (__hpux__)
  60 extern "C"
  61 {
  62   struct mallinfo
  63   {
  64     int uordblks;
  65     int hblkhd;
  66   };
  67
  68   struct mallinfo empty = { 0, 0 };
  69
  70   struct mallinfo
  71   mallinfo(void)
  72   { return empty; }
  73 }
  74 #endif
  75
  76 namespace __gnu_test
  77 {
  78   class time_counter
  79   {
  80   private:
  81     clock_t     elapsed_begin;
  82     clock_t     elapsed_end;
  83     tms         tms_begin;
  84     tms         tms_end;
  85
  86   public:
  87     explicit
  88     time_counter() : elapsed_begin(), elapsed_end(), tms_begin(), tms_end()
  89     { }
  90
  91     void
  92     clear() throw()
  93     {
  94       elapsed_begin = clock_t();
  95       elapsed_end = clock_t();
  96       tms_begin = tms();
  97       tms_end = tms();
  98     }
  99
 100     void
 101     start()
 102     {
 103       this->clear();
 104       elapsed_begin = times(&tms_begin);
 105       const clock_t err = clock_t(-1);
 106       if (elapsed_begin == err)
 107         std::__throw_runtime_error("time_counter::start");
 108     }
 109
 110     void
 111     stop()
 112     {
 113       elapsed_end = times(&tms_end);
 114       const clock_t err = clock_t(-1);
 115       if (elapsed_end == err)
 116         std::__throw_runtime_error("time_counter::stop");
 117     }
 118
 119     size_t
 120     real_time() const
 121     { return elapsed_end - elapsed_begin; }
 122
 123     size_t
 124     user_time() const
 125     { return tms_end.tms_utime - tms_begin.tms_utime; }
 126
 127     size_t
 128     system_time() const
 129     { return tms_end.tms_stime - tms_begin.tms_stime; }
 130   };
 131
 132   class resource_counter
 133   {
 134     int                 who;
 135     rusage              rusage_begin;
 136     rusage              rusage_end;
 137     struct mallinfo     allocation_begin;
 138     struct mallinfo     allocation_end;
 139
 140   public:
 141     resource_counter(int i = RUSAGE_SELF) : who(i)
 142     { this->clear(); }
 143
 144     void
 145     clear() throw()
 146     {
 147       memset(&rusage_begin, 0, sizeof(rusage_begin));
 148       memset(&rusage_end, 0, sizeof(rusage_end));
 149       memset(&allocation_begin, 0, sizeof(allocation_begin));
 150       memset(&allocation_end, 0, sizeof(allocation_end));
 151     }
 152
 153     void
 154     start()
 155     {
 156       if (getrusage(who, &rusage_begin) != 0 )
 157         memset(&rusage_begin, 0, sizeof(rusage_begin));
 158       malloc(0); // Needed for some implementations.
 159       allocation_begin = mallinfo();
 160     }
 161
 162     void
 163     stop()
 164     {
 165       if (getrusage(who, &rusage_end) != 0 )
 166         memset(&rusage_end, 0, sizeof(rusage_end));
 167       allocation_end = mallinfo();
 168     }
 169
 170     int
 171     allocated_memory() const
 172     { return ((allocation_end.uordblks - allocation_begin.uordblks)
 173               + (allocation_end.hblkhd - allocation_begin.hblkhd)); }
 174
 175     long
 176     hard_page_fault() const
 177     { return rusage_end.ru_majflt - rusage_begin.ru_majflt; }
 178
 179     long
 180     swapped() const
 181     { return rusage_end.ru_nswap - rusage_begin.ru_nswap; }
 182   };
 183
 184   inline void
 185   start_counters(time_counter& t, resource_counter& r)
 186   {
 187     t.start();
 188     r.start();
 189   }
 190
 191   inline void
 192   stop_counters(time_counter& t, resource_counter& r)
 193   {
 194     t.stop();
 195     r.stop();
 196   }
 197
 198   inline void
 199   clear_counters(time_counter& t, resource_counter& r)
 200   {
 201     t.clear();
 202     r.clear();
 203   }
 204
 205   void
 206   report_performance(const std::string file, const std::string comment,
 207                      const time_counter& t, const resource_counter& r)
 208   {
 209     const char space = ' ';
 210     const char tab = '\t';
 211     const char* name = "libstdc++-performance.sum";
 212     std::string::const_iterator i = file.begin() + file.find_last_of('/') + 1;
 213     std::string testname(i, file.end());
 214
 215     std::ofstream out(name, std::ios_base::app);
 216
 217 #ifdef __GTHREADS
 218     if (__gthread_active_p())
 219       testname.append("-thread");
 220 #endif
 221
 222     out.setf(std::ios_base::left);
 223     out << std::setw(25) << testname << tab;
 224     out << std::setw(25) << comment << tab;
 225
 226     out.setf(std::ios_base::right);
 227     out << std::setw(4) << t.real_time() << "r" << space;
 228     out << std::setw(4) << t.user_time() << "u" << space;
 229     out << std::setw(4) << t.system_time() << "s" << space;
 230     out << std::setw(8) << r.allocated_memory() << "mem" << space;
 231     out << std::setw(4) << r.hard_page_fault() << "pf" << space;
 232
 233     out << std::endl;
 234     out.close();
 235   }
 236
 237   void
 238   report_header(const std::string file, const std::string header)
 239   {
 240     const char space = ' ';
 241     const char tab = '\t';
 242     const char* name = "libstdc++-performance.sum";
 243     std::string::const_iterator i = file.begin() + file.find_last_of('/') + 1;
 244     std::string testname(i, file.end());
 245
 246     std::ofstream out(name, std::ios_base::app);
 247
 248 #ifdef __GTHREADS
 249     if (__gthread_active_p ())
 250       testname.append("-thread");
 251 #endif
 252
 253     out.setf(std::ios_base::left);
 254     out << std::setw(25) << testname << tab;
 255     out << std::setw(40) << header << tab;
 256
 257     out << std::endl;
 258     out.close();
 259   }
 260 }; // namespace __gnu_test
 261
 262 #endif // _GLIBCXX_PERFORMANCE_H
 263