Line data    Source code

       1              : /*
       2              : Copyright (c) 2003, The Regents of the University of California, through
       3              : Lawrence Berkeley National Laboratory (subject to receipt of any required 
       4              : approvals from U.S. Dept. of Energy) 
       5              : 
       6              : All rights reserved. 
       7              : 
       8              : The source code is distributed under BSD license, see the file License.txt
       9              : at the top-level directory.
      10              : */
      11              : 
      12              : /*! \file
      13              :  * \brief Timer functions to record the time used
      14              :  *
      15              :  * Returns the time in seconds used by the process.
      16              :  *
      17              :  * \note the timer function call is machine dependent. Use conditional
      18              :  *       compilation to choose the appropriate function.
      19              :  *
      20              :  * \ingroup Common
      21              :  */
      22              : 
      23              : #undef USE_TIMES
      24              : 
      25              : #ifdef SUN 
      26              : /*
      27              :  *      It uses the system call gethrtime(3C), which is accurate to 
      28              :  *      nanoseconds. 
      29              : */
      30              : #include <sys/time.h>
      31              : 
      32              : double SuperLU_timer_() {
      33              :     return ( (double)gethrtime() / 1e9 );
      34              : }
      35              : 
      36              : #elif _WIN32
      37              : 
      38              : #include <time.h>
      39              : 
      40              : double SuperLU_timer_()
      41              : {
      42              :     clock_t t;
      43              :     t=clock();
      44              : 
      45              :     return ((double)t)/CLOCKS_PER_SEC;
      46              : }
      47              : 
      48              : #elif defined( USE_TIMES )
      49              : 
      50              : #ifndef NO_TIMER
      51              : #include <sys/types.h>
      52              : #include <sys/times.h>
      53              : #include <sys/time.h>
      54              : #include <unistd.h>
      55              : #endif
      56              : 
      57              : /*! \brief Timer function
      58              :  *
      59              :  * \return The time in seconds used by the process.
      60              :  */ 
      61              : double SuperLU_timer_()
      62              : {
      63              : #ifdef NO_TIMER
      64              :     /* no sys/times.h on WIN32 */
      65              :     double tmp;
      66              :     tmp = 0.0;
      67              : #else
      68              :     struct tms use;
      69              :     double tmp;
      70              :     int clocks_per_sec = sysconf(_SC_CLK_TCK);
      71              : 
      72              :     times ( &use );
      73              :     tmp = use.tms_utime;
      74              :     tmp += use.tms_stime;
      75              : #endif
      76              :     return (double)(tmp) / clocks_per_sec;
      77              : }
      78              : 
      79              : #else
      80              : 
      81              : #include <sys/time.h>
      82              : #include <stdlib.h>
      83              : 
      84              : /*! \brief Timer function
      85              :  *
      86              :  * \return The time in seconds used by the process.
      87              :  */ 
      88            0 : double SuperLU_timer_(void)
      89              : {
      90              :     struct timeval tp;
      91              :     double tmp;
      92            0 :     gettimeofday(&tp, NULL);
      93            0 :     tmp = tp.tv_sec + tp.tv_usec/1000000.0;
      94            0 :     return (tmp);
      95              : }
      96              : 
      97              : #endif