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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* changes:
* rename pio_timer.c as io_timer.c;
* Removed pio_perf.h so that it is not dependent on it;
* Removed set_timer_type() and get_timer_type() since no one calls them;
* Merged sio_timer.c into io_timer.c;
*/
/*
* Purpose:
*
* This is a module of useful timing functions for performance testing.
*/
#include "H5private.h"
#include "io_timer.h"
/*
* The number to divide the tv_usec field with to get a nice decimal to add to
* the number of seconds.
*/
#define MICROSECOND 1000000.0F
/* global variables */
static io_time_t *timer_g; /* timer: global for stub functions */
/*
* Function: sub_time
* Purpose: Struct two time values, and return the difference, in microseconds
*
* Note that the function assumes that a > b
*/
static double
sub_time(struct timeval *a, struct timeval *b)
{
return (((double)a->tv_sec + ((double)a->tv_usec) / (double)MICROSECOND) -
((double)b->tv_sec + ((double)b->tv_usec) / (double)MICROSECOND));
}
/*
* Function: io_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_CLOCK for MPI_Wtime or
* SYS_CLOCK for system time).
* Return: Pointer to io_time object
*/
io_time_t *
io_time_new(clock_type type)
{
io_time_t *pt = (io_time_t *)calloc(1, sizeof(struct io_time_t));
/* set global timer variable */
timer_g = pt;
pt->type = type;
return pt;
}
/*
* Function: io_time_destroy
* Purpose: Remove the memory allocated for the io_time object. Only
* need to call on a pointer allocated with the ``io_time_new''
* function.
* Return: Nothing
*/
void
io_time_destroy(io_time_t *pt)
{
free(pt);
/* reset the global timer pointer too. */
timer_g = NULL;
}
#if 0
/* no one is calling set_timer_type or get_timer_type ???*/
/*
* Function: set_timer_type
* Purpose: Set the type of the timer to either MPI_CLOCK or SYS_CLOCK.
* This really only needs to be called if you didn't construct a
* timer with the pio_timer_new function (shame!).
* Return: Nothing
*/
void
set_timer_type(io_time_t *pt, clock_type type)
{
pt->type = type;
}
/*
* Function: get_timer_type
* Purpose: Get the type of the timer.
* Return: MPI_CLOCK or SYS_CLOCK.
*/
clock_type
get_timer_type(io_time_t *pt)
{
return pt->type;
}
#endif
/*
* Function: io_time_set
* Purpose: Set the time in a ``io_time_t'' object.
* Return: Pointer to the passed in ``io_time_t'' object if SUCCEED; Null otherwise.
*/
io_time_t *
io_time_set(io_time_t *pt, timer_type t, int start_stop)
{
/* sanity check */
assert(pt);
switch (pt->type) {
#ifdef H5_HAVE_PARALLEL
case MPI_CLOCK:
if (start_stop == TSTART) {
pt->mpi_timer[t] = MPI_Wtime();
/* When we start the timer for HDF5_FINE_WRITE_FIXED_DIMS or HDF5_FINE_READ_FIXED_DIMS
* we compute the time it took to only open the file */
if (t == HDF5_FINE_WRITE_FIXED_DIMS)
pt->total_time[HDF5_FILE_WRITE_OPEN] +=
pt->mpi_timer[t] - pt->mpi_timer[HDF5_GROSS_WRITE_FIXED_DIMS];
else if (t == HDF5_FINE_READ_FIXED_DIMS)
pt->total_time[HDF5_FILE_READ_OPEN] +=
pt->mpi_timer[t] - pt->mpi_timer[HDF5_GROSS_READ_FIXED_DIMS];
}
else {
pt->total_time[t] += MPI_Wtime() - pt->mpi_timer[t];
pt->mpi_timer[t] = MPI_Wtime();
/* When we stop the timer for HDF5_GROSS_WRITE_FIXED_DIMS or HDF5_GROSS_READ_FIXED_DIMS
* we compute the time it took to close the file after the last read/write finished */
if (t == HDF5_GROSS_WRITE_FIXED_DIMS)
pt->total_time[HDF5_FILE_WRITE_CLOSE] +=
pt->mpi_timer[t] - pt->mpi_timer[HDF5_FINE_WRITE_FIXED_DIMS];
else if (t == HDF5_GROSS_READ_FIXED_DIMS)
pt->total_time[HDF5_FILE_READ_CLOSE] +=
pt->mpi_timer[t] - pt->mpi_timer[HDF5_FINE_READ_FIXED_DIMS];
}
break;
#else
case MPI_CLOCK:
fprintf(stderr, "MPI clock set in serial library\n");
return NULL;
#endif /* H5_HAVE_PARALLEL */
case SYS_CLOCK:
if (start_stop == TSTART) {
HDgettimeofday(&pt->sys_timer[t], NULL);
/* When we start the timer for HDF5_FINE_WRITE_FIXED_DIMS or HDF5_FINE_READ_FIXED_DIMS
* we compute the time it took to only open the file */
if (t == HDF5_FINE_WRITE_FIXED_DIMS)
pt->total_time[HDF5_FILE_WRITE_OPEN] +=
sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_GROSS_WRITE_FIXED_DIMS]));
else if (t == HDF5_FINE_READ_FIXED_DIMS)
pt->total_time[HDF5_FILE_READ_OPEN] +=
sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_GROSS_READ_FIXED_DIMS]));
}
else {
struct timeval sys_t;
HDgettimeofday(&sys_t, NULL);
pt->total_time[t] += sub_time(&sys_t, &(pt->sys_timer[t]));
/* When we stop the timer for HDF5_GROSS_WRITE_FIXED_DIMS or HDF5_GROSS_READ_FIXED_DIMS
* we compute the time it took to close the file after the last read/write finished */
if (t == HDF5_GROSS_WRITE_FIXED_DIMS)
pt->total_time[HDF5_FILE_WRITE_CLOSE] +=
sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_FINE_WRITE_FIXED_DIMS]));
else if (t == HDF5_GROSS_READ_FIXED_DIMS)
pt->total_time[HDF5_FILE_READ_CLOSE] +=
sub_time(&(pt->sys_timer[t]), &(pt->sys_timer[HDF5_FINE_READ_FIXED_DIMS]));
}
break;
default:
fprintf(stderr, "Unknown time clock type (%d)\n", pt->type);
return NULL;
} /* end switch */
#if 0
/* this does not belong here. Need fix in h5perf code when set_time() is called. -AKC- */
debug_start_stop_time(pt, t, start_stop);
#endif
return pt;
}
/*
* Function: io_time_get
* Purpose: Get the time from a ``io_time_t'' object.
* Return: The number of seconds as a DOUBLE.
*/
H5_ATTR_PURE double
io_time_get(io_time_t *pt, timer_type t)
{
/* sanity check */
assert(pt);
return pt->total_time[t];
}
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