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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <sys/times.h>
#include <sys/statfs.h>
#include <ffio.h>
#define MINBLOCKSIZE (1*1024)
#define MAXBLOCKSIZE (512*1024) /* multiple of MINBLOCKSIZE */
#define MAXFILESIZE (128*1024*1024) /* multiple of MAXBLOCKSIZE */
#define DATAFILE "bla"
#define STATFILE "ffio.c"
#define LAYERS "" /*bufa.bufsize=1024.num_buffers=1"*/
#ifdef T3E
#define S_IWRITE 00200
#define S_IREAD 00400
#endif
int main (int argc, char *argv [])
{
int i, blocksize, rank=3;
int outfile;
void *data;
struct tms starttime, stoptime;
double utime, stime;
int open_mode;
int cblks; /* size = cblks * 512 words */
long cbits;
char layers [256];
struct ffsw ffopens_status;
#ifdef T3E
struct statfs statfs_info;
#endif
data = (void *) calloc (sizeof (char), MAXBLOCKSIZE);
if (! data) {
printf ("Couldn't allocate enough memory\n");
exit (1);
}
/* set file open parameters */
#ifdef T3E
#if 0
if (statfs (STATFILE, &statfs_info, sizeof (statfs_info), 0) < 0) {
perror ("statfs() failed: ");
exit (1);
}
printf ("secondary partitions' bitmask: 0x%lx\n", statfs_info.f_secparts);
cbits = 0;
cbits |= (1 << 24);
cbits |= (1 << 06);
cbits |= (1 << 26);
cbits |= (1 << 23);
#endif
open_mode = O_WRONLY | O_CREAT | O_PLACE;
cbits = 0;
cblks = 100;
#else
open_mode = O_WRONLY | O_CREAT;
cbits = 0;
cblks = 0;
#endif
for (blocksize = MINBLOCKSIZE; blocksize <= MAXBLOCKSIZE; blocksize *= 2) {
times (&starttime);
/* open the file */
outfile = ffopens (DATAFILE, open_mode, S_IWRITE | S_IREAD,
cbits, cblks, &ffopens_status, LAYERS);
if (! outfile) {
perror ("ffopens() failed: ");
exit (1);
}
/* system ("setf -n32768b:128b -c -p 24:06:23:26 bla");*/
/* write some data */
for (i = 0; i < MAXFILESIZE / blocksize; i++)
if (ffwrite (outfile, data, blocksize) < 0) {
perror ("ffwrite() failed: ");
exit (1);
}
/* close and remove the file */
ffclose (outfile);
remove (DATAFILE);
times (&stoptime);
utime = (stoptime.tms_utime -starttime.tms_utime) / (double) CLK_TCK;
stime = (stoptime.tms_stime -starttime.tms_stime) / (double) CLK_TCK;
printf ("blocksize [bytes]: %d\ttimes(u/s) [s]: %f %f\tbandwidth [MB/s]: %f\n",
blocksize, utime, stime,
MAXFILESIZE / (utime + stime) / (1024*1024));
}
free (data);
return (0);
}
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