Branch: Tag:

2003-11-25

2003-11-25 17:58:24 by 0

Use Mach calls to get user time for threads on OS X. By not calling clock()
we get a significant performance boost for threaded programs.

Rev: src/threads.c:1.228

2:   || This file is part of Pike. For copyright information see COPYRIGHT.   || Pike is distributed under GPL, LGPL and MPL. See the file COPYING   || for more information. - || $Id: threads.c,v 1.227 2003/11/22 15:00:54 grubba Exp $ + || $Id: threads.c,v 1.228 2003/11/25 17:58:24 jonasw Exp $   */      #ifndef CONFIGURE_TEST   #include "global.h" - RCSID("$Id: threads.c,v 1.227 2003/11/22 15:00:54 grubba Exp $"); + RCSID("$Id: threads.c,v 1.228 2003/11/25 17:58:24 jonasw Exp $");      PMOD_EXPORT int num_threads = 1;   PMOD_EXPORT int threads_disabled = 0;
42:   #include <sys/prctl.h>   #endif /* HAVE_SYS_PRCTL_H */    + #ifdef HAVE_MACH_TASK_INFO_H + #include <mach/task_info.h> + #endif + #ifdef HAVE_MACH_TASK_H + #include <mach/task.h> + #endif + #ifdef HAVE_MACH_MACH_INIT_H + #include <mach/mach_init.h> + #endif +  + #ifdef HAVE_SYS_TIME_H + #include <sys/time.h> + #endif +    #ifndef PIKE_THREAD_C_STACK_SIZE   #define PIKE_THREAD_C_STACK_SIZE (256 * 1024)   #endif
719: Inside #if undefined(HAVE_NO_YIELD) and #if defined(HAVE_GETHRTIME)
   return;    last_ = now;    } + #elif HAVE_MACH_TASK_INFO_H +  { +  static struct timeval last_check = { 0, 0 }; +  task_thread_times_info_data_t info; +  mach_msg_type_number_t info_size = TASK_THREAD_TIMES_INFO_COUNT; +  +  /* Get user time and test if 50usec has passed since last check. */ +  if (task_info(mach_task_self(), TASK_THREAD_TIMES_INFO, +  (task_info_t) &info, &info_size) == 0) { +  /* Compute difference by converting kernel time_info_t to timeval. */ +  struct timeval now; +  struct timeval diff; +  now.tv_sec = info.user_time.seconds; +  now.tv_usec = info.user_time.microseconds; +  timersub(&now, &last_check, &diff); +  if (diff.tv_usec < 50000 && diff.tv_sec == 0) +  return; +  last_check = now; +  } +  }   #elif defined (USE_CLOCK_FOR_SLICES)    if (clock() - thread_start_clock < (clock_t) (CLOCKS_PER_SEC / 20))    return;