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/*
* Copyright (C) 1998 NCSA
* All rights reserved.
*
* Programmer: Robb Matzke <matzke@llnl.gov>
* Thursday, March 12, 1998
*/
#undef NDEBUG
#include <assert.h>
#include <fcntl.h>
#include <hdf5.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#define RAW_FILE_NAME "iopipe.raw"
#define HDF5_FILE_NAME "iopipe.h5"
#define HEADING "%-16s"
#define PROGRESS '='
#if 1
/* Normal testing */
#define REQUEST_SIZE_X 4579
#define REQUEST_SIZE_Y 4579
#define NREAD_REQUESTS 45
#define NWRITE_REQUESTS 45
#else
/* Speedy testing */
#define REQUEST_SIZE_X 1000
#define REQUEST_SIZE_Y 1000
#define NREAD_REQUESTS 45
#define NWRITE_REQUESTS 45
#endif
/*-------------------------------------------------------------------------
* Function: print_stats
*
* Purpose: Prints statistics
*
* Return: void
*
* Programmer: Robb Matzke
* Thursday, March 12, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static void
print_stats (const char *prefix,
struct rusage *r_start, struct rusage *r_stop,
struct timeval *t_start, struct timeval *t_stop,
size_t nbytes)
{
double u_time, s_time, e_time, bw;
u_time = ((double)(r_stop->ru_utime.tv_sec)+
(double)(r_stop->ru_utime.tv_usec)/1000000.0) -
((double)(r_start->ru_utime.tv_sec)+
(double)(r_start->ru_utime.tv_usec)/1000000.0);
s_time = ((double)(r_stop->ru_stime.tv_sec)+
(double)(r_stop->ru_stime.tv_usec)/1000000.0) -
((double)(r_start->ru_stime.tv_sec)+
(double)(r_start->ru_stime.tv_usec)/1000000.0);
e_time = ((double)(t_stop->tv_sec)+
(double)(t_stop->tv_usec)/1000000.0) -
((double)(t_start->tv_sec)+
(double)(t_start->tv_usec)/1000000.0);
bw = (double)nbytes / e_time;
printf (HEADING "%1.2fuser %1.2fsystem %1.2felapsed %1.2fMB/s\n",
prefix, u_time, s_time, e_time, bw/(1024*1024));
}
/*-------------------------------------------------------------------------
* Function: synchronize
*
* Purpose:
*
* Return: void
*
* Programmer: Robb Matzke
* Thursday, March 12, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static void
synchronize (void)
{
#ifdef HAVE_SYSTEM
system ("sync");
system ("df >/dev/null");
#if 0
/*
* This works well on Linux to get rid of all cached disk buffers. The
* number should be approximately the amount of RAM in MB. Do not
* include swap space in that amount or the command will fail.
*/
system ("/sbin/swapout 128");
#endif
#endif
}
/*-------------------------------------------------------------------------
* Function: main
*
* Purpose:
*
* Return: Success:
*
* Failure:
*
* Programmer: Robb Matzke
* Thursday, March 12, 1998
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
int
main (void)
{
static size_t size[2] = {REQUEST_SIZE_X, REQUEST_SIZE_Y};
static int nread=NREAD_REQUESTS, nwrite=NWRITE_REQUESTS;
unsigned char *the_data = NULL;
hid_t file, dset, file_space=-1;
herr_t status;
struct rusage r_start, r_stop;
struct timeval t_start, t_stop;
int i, fd;
ssize_t n;
off_t offset;
int start[2];
size_t count[2];
printf ("I/O request size is %1.1fMB\n",
((double)(size[0])*(double)(size[1]))/(1024.0*1024));
/* Open the files */
file = H5Fcreate (HDF5_FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
assert (file>=0);
fd = open (RAW_FILE_NAME, O_RDWR|O_CREAT|O_TRUNC, 0666);
assert (fd>=0);
/* Create the dataset */
file_space = H5Screate_simple (2, size, size);
assert (file_space>=0);
dset = H5Dcreate (file, "dset", H5T_NATIVE_UCHAR, file_space, H5P_DEFAULT);
assert (dset>=0);
the_data = malloc (size[0]*size[1]);
memset (the_data, 0xAA, size[0]*size[1]); /*initial fill for lazy malloc*/
/* Fill raw */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "fill raw");
for (i=0; i<nwrite; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
memset (the_data, 0xAA, size[0]*size[1]);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("fill raw",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Fill hdf5 */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "fill hdf5");
for (i=0; i<nread; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
H5P_DEFAULT, the_data);
assert (status>=0);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("fill hdf5",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Write the raw dataset */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "out raw");
for (i=0; i<nwrite; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
offset = lseek (fd, 0, SEEK_SET);
assert (0==offset);
n = write (fd, the_data, size[0]*size[1]);
assert (n==size[0]*size[1]);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("out raw",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Write the hdf5 dataset */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "out hdf5");
for (i=0; i<nwrite; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
status = H5Dwrite (dset, H5T_NATIVE_UCHAR, H5S_ALL, H5S_ALL,
H5P_DEFAULT, the_data);
assert (status>=0);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("out hdf5",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Read the raw dataset */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "in raw");
for (i=0; i<nread; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
offset = lseek (fd, 0, SEEK_SET);
assert (0==offset);
n = read (fd, the_data, size[0]*size[1]);
assert (n==size[0]*size[1]);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("in raw",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Read the hdf5 dataset */
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "in hdf5");
for (i=0; i<nread; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
H5P_DEFAULT, the_data);
assert (status>=0);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("in hdf5",
&r_start, &r_stop, &t_start, &t_stop,
nread*size[0]*size[1]);
/* Read hyperslab */
assert (size[0]>20 && size[1]>20);
start[0] = start[1] = 10;
count[0] = count[1] = size[0]-20;
status = H5Sset_hyperslab (file_space, start, count, NULL);
assert (status>=0);
synchronize ();
getrusage (RUSAGE_SELF, &r_start);
gettimeofday (&t_start, NULL);
fprintf (stderr, HEADING, "in hdf5 partial");
for (i=0; i<nread; i++) {
putc (PROGRESS, stderr);
fflush (stderr);
status = H5Dread (dset, H5T_NATIVE_UCHAR, file_space, file_space,
H5P_DEFAULT, the_data);
assert (status>=0);
}
getrusage (RUSAGE_SELF, &r_stop);
gettimeofday (&t_stop, NULL);
putc ('\n', stderr);
print_stats ("in hdf5 partial",
&r_start, &r_stop, &t_start, &t_stop,
nread*count[0]*count[1]);
/* Close everything */
close (fd);
H5Dclose (dset);
H5Sclose (file_space);
H5Fclose (file);
return 0;
}
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