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/*
Date: Fri, 10 Nov 2006 16:16:27 +0300
From: "Igor A. Valcov" <viaprog@gmail.com>
Date: Tue 10 May 2011 17:28:10
From: "Raghavendra Bhat" <raghavendrambk@gmail.com>
*/
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#define __BYTES 8192
#define __FILES 30000
#define N 30000
char buf [__BYTES];
void open_write_sync_close (int32_t num_files, int32_t iterations);
void delete_files (char *dirname, int32_t num_files);
int main (int argc, char *argv[])
{
int32_t num_files = 0;
int32_t iterations = 0;
char *tail = NULL;
long tmp = 0;
int ret = -1;
num_files = __FILES;
iterations = N;
if (argc > 1) {
tmp = strtol (argv[1], &tail, 0);
if (tmp < 0) {
fprintf (stderr, "number of files cannot be -ve\n");
goto out;
}
num_files = (int32_t)tmp;
iterations = num_files;
}
printf ("%d\n", num_files);
open_write_sync_close (num_files, iterations);
ret = 0;
out:
return ret;
}
void
open_write_sync_close (int32_t num_files, int32_t iterations)
{
char fname[4096];
int nFiles[num_files];
int f, i;
int32_t ret = -1;
char *dirname = "sync_field";
char *entries_path = NULL;
/* Fill buf */
for (i = 0; i < __BYTES; i++)
buf [i] = i % 128;
entries_path = getcwd (entries_path, 255);
strcat (entries_path, dirname);
/* Create the directory in which test are conducted */
ret = mkdir (dirname, 0755);
if (ret == -1) {
fprintf (stderr, "cannot create directory (%s)\n",
strerror (errno));
goto out;
}
/* Create and open files */
for (f = 0; f < num_files; f++) {
sprintf (fname, "%s/file-%d", dirname, f);
nFiles [f] = open(fname, O_WRONLY | O_CREAT | O_TRUNC, 0644);
printf("\r fd [%d] = %d", f, nFiles[f]);
}
/* Write to the files opened */
for (i = 0; i < iterations; i++) {
printf("\r%d/%d ", i, iterations);
fflush(stdout);
for (f = 1; f < num_files; f++)
write(nFiles[f], buf, __BYTES);
}
printf("\n");
printf("syncing\n");
/* sync the data */
for (f = 0; f < num_files; f++) {
fsync(nFiles [f]);
close(nFiles [f]);
}
/* delete the files created and the directory whete tests
are conducted */
delete_files (dirname, num_files);
rmdir (dirname);
out:
return;
}
void
delete_files (char *dirname, int32_t num_files)
{
int32_t i = -1;
char name[4096];
for (i = 0; i < num_files; i++) {
snprintf (name, 4096, "%s/file-%d", dirname, i);
unlink (name);
}
}
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