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/*
* Copyright (C) 2001
* National Center for Supercomputing Applications
* All rights reserved.
*/
/*
* Purpose:
*
* This is a module of useful timing functions for performance testing.
*/
#include <stdio.h>
#include <stdlib.h>
#include "pio_timer.h"
#ifdef H5_HAVE_PARALLEL
#include <mpi.h>
/*
* The number to divide the tv_usec field with to get a nice decimal to add to
* the number of seconds.
*/
#define MILLISECOND 1000000.0
/*
* Function: pio_time_new
* Purpose: Build us a brand, spankin', new performance time object.
* The object is a black box to the user. They just tell us
* what type of timer they want (MPI_TIMER for MPI_Wtime or
* SYS_TIMER for system time).
* Return: Pointer to pio_time object
* Programmer: Bill Wendling, 01. October 2001
* Modifications:
*/
pio_time *
pio_time_new(unsigned int type)
{
pio_time *pt = (pio_time *)calloc(1, sizeof(struct pio_time_));
pt->type = type;
return pt;
}
/*
* Function: pio_time_destroy
* Purpose: Remove the memory allocated for the pio_time object. Only
* need to call on a pointer allocated with the ``pio_time_new''
* function.
* Return: Nothing
* Programmer: Bill Wendling, 01. October 2001
* Modifications:
*/
void
pio_time_destroy(pio_time *pt)
{
free(pt);
}
/*
* Function: set_timer_type
* Purpose: Set the type of the timer to either MPI_TIMER or SYS_TIMER.
* This really only needs to be called if you didn't construct a
* timer with the pio_timer_new function (shame!).
* Return: Nothing
* Programmer: Bill Wendling, 04. October 2001
* Modifications:
*/
void
set_timer_type(pio_time *pt, timer_type type)
{
pt->type = type;
}
/*
* Function: get_timer_type
* Purpose: Get the type of the timer.
* Return: MPI_TIMER or SYS_TIMER.
* Programmer: Bill Wendling, 04. October 2001
* Modifications:
*/
timer_type
get_timer_type(pio_time *pt)
{
return pt->type;
}
/*
* Function: set_time
* Purpose: Set the time in a ``pio_time'' object.
* Return: Pointer to the passed in ``pio_time'' object.
* Programmer: Bill Wendling, 01. October 2001
* Modifications:
*/
pio_time *
set_time(pio_time *pt, timer_type t, int start_stop)
{
if (pt) {
if (pt->type == MPI_TIMER) {
if (start_stop == START) {
pt->mpi_timer[t] = MPI_Wtime();
} else {
pt->total_time[t] += MPI_Wtime() - pt->mpi_timer[t];
}
} else {
if (start_stop == START) {
gettimeofday(&pt->sys_timer[t], NULL);
} else {
struct timeval sys_t;
gettimeofday(&sys_t, NULL);
pt->total_time[t] =
((double)sys_t.tv_sec +
((double)sys_t.tv_usec) / MILLISECOND) -
((double)pt->sys_timer[t].tv_sec +
((double)pt->sys_timer[t].tv_usec) / MILLISECOND);
}
}
}
return pt;
}
/*
* Function: get_time
* Purpose: Get the time from a ``pio_time'' object.
* Return: The number of seconds as a DOUBLE.
* Programmer: Bill Wendling, 01. October 2001
* Modifications:
*/
double
get_time(pio_time *pt, timer_type t)
{
return pt->total_time[t];
}
#endif /* H5_HAVE_PARALLEL */
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