src/xbt/xbt_os_time.c

   1 /* xbt_os_time.c -- portable interface to time-related functions            */
   2
   3 /* Copyright (c) 2007-2019. The SimGrid Team. All rights reserved.          */
   4
   5 /* This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the license (GNU LGPL) which comes with this package. */
   7
   8 #include "src/internal_config.h"
   9 #include "xbt/sysdep.h"
  10 #include "xbt/log.h"
  11 #include "xbt/xbt_os_time.h"    /* this module */
  12 #include <math.h>               /* floor */
  13 #include <sys/time.h>
  14 #include <time.h>
  15
  16 #ifdef _WIN32
  17 #include <sys/timeb.h>
  18 #include <windows.h>
  19 #else
  20 #include <unistd.h>
  21 #endif
  22
  23 //Freebsd doesn't provide this clock_gettime flag yet, because it was added too recently (after 1993)
  24 #if defined (CLOCK_PROF) && ! defined (CLOCK_PROCESS_CPUTIME_ID)
  25 #define CLOCK_PROCESS_CPUTIME_ID CLOCK_PROF
  26 #endif
  27
  28 #if defined(__APPLE__) && defined(__MACH__)
  29 #include <sys/types.h>
  30 #include <sys/sysctl.h>
  31 #include <mach/mach_init.h>
  32 #include <mach/mach_host.h>
  33 #include <mach/mach_port.h>
  34 #include <mach/mach_traps.h>
  35 #include <mach/task_info.h>
  36 #include <mach/thread_info.h>
  37 #include <mach/thread_act.h>
  38 #include <mach/vm_region.h>
  39 #include <mach/vm_map.h>
  40 #include <mach/task.h>
  41 #endif
  42
  43 #ifdef _WIN32
  44 static void w32_time_to_timeval(struct timeval* tv, const FILETIME* ft)
  45 {
  46   unsigned __int64 tm;
  47   tm = (unsigned __int64)ft->dwHighDateTime << 32;
  48   tm |= ft->dwLowDateTime;
  49   tm /= 10;
  50   tm -= 11644473600000000ULL;
  51   tv->tv_sec  = (long)(tm / 1000000L);
  52   tv->tv_usec = (long)(tm % 1000000L);
  53 }
  54
  55 static void w32_times_to_timeval(struct timeval* tv, const FILETIME* kernel_time, const FILETIME* user_time)
  56 {
  57   unsigned __int64 ktm, utm;
  58   ktm = (unsigned __int64)kernel_time->dwHighDateTime << 32;
  59   ktm |= kernel_time->dwLowDateTime;
  60   ktm /= 10;
  61   utm = (unsigned __int64)user_time->dwHighDateTime << 32;
  62   utm |= user_time->dwLowDateTime;
  63   utm /= 10;
  64   tv->tv_sec  = (long)(ktm / 1000000L) + (long)(utm / 1000000L);
  65   tv->tv_usec = (long)(ktm % 1000000L) + (long)(utm % 1000000L);
  66 }
  67 #endif
  68
  69 double xbt_os_time(void)
  70 {
  71 #if HAVE_GETTIMEOFDAY
  72   struct timeval tv;
  73   gettimeofday(&tv, NULL);
  74 #elif defined(_WIN32)
  75   struct timeval tv;
  76   FILETIME ft;
  77   GetSystemTimeAsFileTime(&ft);
  78   w32_time_to_timeval(&tv, &ft);
  79 #else                           /* not windows, no gettimeofday => poor resolution */
  80   return (double) (time(NULL));
  81 #endif                          /* HAVE_GETTIMEOFDAY? */
  82
  83   return (double) (tv.tv_sec + tv.tv_usec / 1000000.0);
  84 }
  85
  86 void xbt_os_sleep(double sec)
  87 {
  88
  89 #ifdef _WIN32
  90   Sleep((floor(sec) * 1000) + ((sec - floor(sec)) * 1000));
  91
  92 #elif HAVE_NANOSLEEP
  93   struct timespec ts;
  94   ts.tv_sec = sec;
  95   ts.tv_nsec = (sec - floor(sec)) * 1e9;
  96   nanosleep (&ts, NULL);
  97 #else                           /* don't have nanosleep. Use select to sleep less than one second */
  98   struct timeval timeout;
  99
 100   timeout.tv_sec = (unsigned long) (sec);
 101   timeout.tv_usec = (sec - floor(sec)) * 1000000;
 102
 103   select(0, NULL, NULL, NULL, &timeout);
 104 #endif
 105 }
 106
 107 /* TSC (tick-level) timers are said to be unreliable on SMP hosts and thus  disabled in SDL source code */
 108
 109 /* @defgroup XBT_sysdep All system dependency
 110  * @brief This section describes many macros/functions that can serve as  an OS abstraction.
 111  */
 112 struct s_xbt_os_timer {
 113 #if HAVE_POSIX_GETTIME
 114   struct timespec start;
 115   struct timespec stop;
 116   struct timespec elapse;
 117 #elif HAVE_GETTIMEOFDAY || defined(_WIN32)
 118   struct timeval start;
 119   struct timeval stop;
 120   struct timeval elapse;
 121 #else
 122   unsigned long int start;
 123   unsigned long int stop;
 124   unsigned long int elapse;
 125 #endif
 126 };
 127
 128 size_t xbt_os_timer_size(void)
 129 {
 130   return sizeof(struct s_xbt_os_timer);
 131 }
 132
 133 xbt_os_timer_t xbt_os_timer_new(void)
 134 {
 135   return xbt_new0(struct s_xbt_os_timer, 1);
 136 }
 137
 138 void xbt_os_timer_free(xbt_os_timer_t timer)
 139 {
 140   free(timer);
 141 }
 142
 143 double xbt_os_timer_elapsed(xbt_os_timer_t timer)
 144 {
 145 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 146   return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) + ((double) timer->elapse.tv_sec ) +
 147       ((((double) timer->stop.tv_nsec) - ((double) timer->start.tv_nsec) + ((double) timer->elapse.tv_nsec )) / 1e9);
 148 #elif HAVE_GETTIMEOFDAY || defined(_WIN32)
 149   return ((double) timer->stop.tv_sec) - ((double) timer->start.tv_sec) + ((double) timer->elapse.tv_sec ) +
 150       ((((double) timer->stop.tv_usec) - ((double) timer->start.tv_usec) + ((double) timer->elapse.tv_usec )) /
 151          1000000.0);
 152 #else
 153   return (double) timer->stop - (double) timer->start + (double) timer->elapse;
 154 #endif
 155 }
 156
 157 void xbt_os_walltimer_start(xbt_os_timer_t timer)
 158 {
 159 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 160   timer->elapse.tv_sec = 0;
 161   timer->elapse.tv_nsec = 0;
 162   clock_gettime(CLOCK_REALTIME, &(timer->start));
 163 #elif HAVE_GETTIMEOFDAY
 164   timer->elapse.tv_sec = 0;
 165   timer->elapse.tv_usec = 0;
 166   gettimeofday(&(timer->start), NULL);
 167 #elif defined(_WIN32)
 168   timer->elapse.tv_sec = 0;
 169   timer->elapse.tv_usec = 0;
 170   FILETIME ft;
 171   GetSystemTimeAsFileTime(&ft);
 172   w32_time_to_timeval(&timer->start, &ft);
 173 #else
 174   timer->elapse = 0;
 175   timer->start = (unsigned long int) (time(NULL));
 176 #endif
 177 }
 178
 179 void xbt_os_walltimer_resume(xbt_os_timer_t timer)
 180 {
 181 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 182   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 183
 184    timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
 185   clock_gettime(CLOCK_REALTIME, &(timer->start));
 186 #elif HAVE_GETTIMEOFDAY
 187   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 188   timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
 189   gettimeofday(&(timer->start), NULL);
 190 #elif defined(_WIN32)
 191   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 192   timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
 193   FILETIME ft;
 194   GetSystemTimeAsFileTime(&ft);
 195   w32_time_to_timeval(&timer->start, &ft);
 196 #else
 197   timer->elapse = timer->stop - timer->start;
 198   timer->start = (unsigned long int) (time(NULL));
 199 #endif
 200 }
 201
 202 void xbt_os_walltimer_stop(xbt_os_timer_t timer)
 203 {
 204 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 205   clock_gettime(CLOCK_REALTIME, &(timer->stop));
 206 #elif HAVE_GETTIMEOFDAY
 207   gettimeofday(&(timer->stop), NULL);
 208 #elif defined(_WIN32)
 209   FILETIME ft;
 210   GetSystemTimeAsFileTime(&ft);
 211   w32_time_to_timeval(&timer->stop, &ft);
 212 #else
 213   timer->stop = (unsigned long int) (time(NULL));
 214 #endif
 215 }
 216
 217 void xbt_os_cputimer_start(xbt_os_timer_t timer)
 218 {
 219 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 220   timer->elapse.tv_sec = 0;
 221   timer->elapse.tv_nsec = 0;
 222   clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->start));
 223 #elif HAVE_GETTIMEOFDAY //return time and not cputime in this case
 224   timer->elapse.tv_sec = 0;
 225   timer->elapse.tv_usec = 0;
 226   gettimeofday(&(timer->start), NULL);
 227 #elif defined(_WIN32)
 228   timer->elapse.tv_sec = 0;
 229   timer->elapse.tv_usec = 0;
 230   HANDLE h = GetCurrentProcess();
 231   FILETIME creationTime, exitTime, kernelTime, userTime;
 232   GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
 233   w32_times_to_timeval(&timer->start, &kernelTime, &userTime);
 234 #endif
 235 }
 236
 237 void xbt_os_cputimer_resume(xbt_os_timer_t timer)
 238 {
 239 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 240   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 241   timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
 242   clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->start));
 243 #elif HAVE_GETTIMEOFDAY
 244   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 245   timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
 246   gettimeofday(&(timer->start), NULL);
 247 #elif defined(_WIN32)
 248   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 249   timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
 250   HANDLE h = GetCurrentProcess();
 251   FILETIME creationTime, exitTime, kernelTime, userTime;
 252   GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
 253   w32_times_to_timeval(&timer->start, &kernelTime, &userTime);
 254 #endif
 255 }
 256
 257 void xbt_os_cputimer_stop(xbt_os_timer_t timer)
 258 {
 259 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 260   clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(timer->stop));
 261 #elif HAVE_GETTIMEOFDAY
 262   gettimeofday(&(timer->stop), NULL);
 263 #elif defined(_WIN32)
 264   HANDLE h = GetCurrentProcess();
 265   FILETIME creationTime, exitTime, kernelTime, userTime;
 266   GetProcessTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
 267   w32_times_to_timeval(&timer->stop, &kernelTime, &userTime);
 268 #endif
 269 }
 270
 271 void xbt_os_threadtimer_start(xbt_os_timer_t timer)
 272 {
 273 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 274   timer->elapse.tv_sec = 0;
 275   timer->elapse.tv_nsec = 0;
 276   clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->start));
 277 #elif HAVE_GETTIMEOFDAY && defined(__MACH__) && defined(__APPLE__)
 278   timer->elapse.tv_sec = 0;
 279   timer->elapse.tv_usec = 0;
 280   mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
 281   thread_basic_info_data_t thi_data;
 282   thread_basic_info_t thi = &thi_data;
 283   thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)thi, &count);
 284   timer->start.tv_usec =  thi->system_time.microseconds + thi->user_time.microseconds;
 285   timer->start.tv_sec = thi->system_time.seconds + thi->user_time.seconds;
 286 #elif HAVE_GETTIMEOFDAY //return time and not cputime in this case
 287   timer->elapse.tv_sec = 0;
 288   timer->elapse.tv_usec = 0;
 289   gettimeofday(&(timer->start), NULL);
 290 #elif defined(_WIN32)
 291   HANDLE h = GetCurrentThread();
 292   FILETIME creationTime, exitTime, kernelTime, userTime;
 293   GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
 294   w32_times_to_timeval(&timer->start, &kernelTime, &userTime);
 295 #endif
 296 }
 297
 298 void xbt_os_threadtimer_resume(xbt_os_timer_t timer)
 299 {
 300 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 301   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 302   timer->elapse.tv_nsec += timer->stop.tv_nsec - timer->start.tv_nsec;
 303   clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->start));
 304 #elif HAVE_GETTIMEOFDAY && defined(__MACH__) && defined(__APPLE__)
 305   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 306   timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
 307   mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
 308   thread_basic_info_data_t thi_data;
 309   thread_basic_info_t thi = &thi_data;
 310   thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)thi, &count);
 311   timer->start.tv_usec =  thi->system_time.microseconds + thi->user_time.microseconds;
 312   timer->start.tv_sec = thi->system_time.seconds + thi->user_time.seconds;
 313 #elif HAVE_GETTIMEOFDAY
 314   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 315   timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
 316   gettimeofday(&(timer->start), NULL);
 317 #elif defined(_WIN32)
 318   timer->elapse.tv_sec += timer->stop.tv_sec - timer->start.tv_sec;
 319   timer->elapse.tv_usec += timer->stop.tv_usec - timer->start.tv_usec;
 320   HANDLE h = GetCurrentThread();
 321   FILETIME creationTime, exitTime, kernelTime, userTime;
 322   GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
 323   w32_times_to_timeval(&timer->start, &kernelTime, &userTime);
 324 #endif
 325 }
 326
 327 void xbt_os_threadtimer_stop(xbt_os_timer_t timer)
 328 {
 329 #if HAVE_POSIX_GETTIME && defined (_POSIX_THREAD_CPUTIME)
 330   clock_gettime(CLOCK_THREAD_CPUTIME_ID, &(timer->stop));
 331 #elif HAVE_GETTIMEOFDAY && defined(__MACH__) && defined(__APPLE__)
 332   mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
 333   thread_basic_info_data_t thi_data;
 334   thread_basic_info_t thi = &thi_data;
 335   thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)thi, &count);
 336   timer->stop.tv_usec =  thi->system_time.microseconds + thi->user_time.microseconds;
 337   timer->stop.tv_sec = thi->system_time.seconds + thi->user_time.seconds;
 338 #elif HAVE_GETTIMEOFDAY //if nothing else is available, return just time
 339   gettimeofday(&(timer->stop), NULL);
 340 #elif defined(_WIN32)
 341   HANDLE h = GetCurrentThread();
 342   FILETIME creationTime, exitTime, kernelTime, userTime;
 343   GetThreadTimes(h, &creationTime, &exitTime, &kernelTime, &userTime);
 344   w32_times_to_timeval(&timer->stop, &kernelTime, &userTime);
 345 #endif
 346 }