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Postgres FD Implementation
Commit b2906c5b authored by Bruce Momjian's avatar Bruce Momjian
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Add fsync tests: 

	Compare fsync before and after write's close:
	Compare one o_sync write to two:
	Compare file sync methods with one 8k write:
	Compare file sync methods with 2 8k writes:
parent 5ddecd1e
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Showing with 144 additions and 49 deletions
src/tools/fsync/test_fsync.c
View file @ b2906c5b
......@@ -6,6 +6,7 @@
#include "../../include/pg_config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
......@@ -26,124 +27,217 @@
#endif
#endif
void die(char *str);
void print_elapse(struct timeval start_t, struct timeval elapse_t);
void die(char *str);
void print_elapse(struct timeval start_t, struct timeval elapse_t);
int main(int argc, char *argv[])
int
main(int argc, char *argv[])
{
struct timeval start_t;
struct timeval elapse_t;
int tmpfile;
char *strout = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
int tmpfile,
i;
char *strout = (char *) malloc(65536);
for (i = 0; i < 65536; i++)
strout[i] = 'a';
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR)) == -1)
die("can't open /var/tmp/test_fsync.out");
write(tmpfile, strout, 65536);
fsync(tmpfile); /* fsync so later fsync's don't have to do
* it */
close(tmpfile);
printf("Simple write timing:\n");
/* write only */
/* write only */
gettimeofday(&start_t, NULL);
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
die("can't open /var/tmp/test_fsync.out");
write(tmpfile, &strout, 200);
close(tmpfile);
write(tmpfile, strout, 8192);
close(tmpfile);
gettimeofday(&elapse_t, NULL);
unlink("/var/tmp/test_fsync.out");
printf("write ");
printf("\twrite ");
print_elapse(start_t, elapse_t);
printf("\n\n");
printf("Compare fsync before and after write's close:\n");
/* write, fsync, close */
gettimeofday(&start_t, NULL);
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
die("can't open /var/tmp/test_fsync.out");
write(tmpfile, &strout, 200);
write(tmpfile, strout, 8192);
fsync(tmpfile);
close(tmpfile);
close(tmpfile);
gettimeofday(&elapse_t, NULL);
unlink("/var/tmp/test_fsync.out");
printf("write, fsync, close ");
printf("\twrite, fsync, close ");
print_elapse(start_t, elapse_t);
printf("\n");
/* write, close, fsync */
gettimeofday(&start_t, NULL);
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
die("can't open /var/tmp/test_fsync.out");
write(tmpfile, &strout, 200);
write(tmpfile, strout, 8192);
close(tmpfile);
/* reopen file */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
die("can't open /var/tmp/test_fsync.out");
fsync(tmpfile);
close(tmpfile);
close(tmpfile);
gettimeofday(&elapse_t, NULL);
unlink("/var/tmp/test_fsync.out");
printf("write, close, fsync ");
printf("\twrite, close, fsync ");
print_elapse(start_t, elapse_t);
printf("\n");
printf("\nTest file sync methods:\n");
printf("\nCompare one o_sync write to two:\n");
/* 16k o_sync write */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
die("can't open /var/tmp/test_fsync.out");
gettimeofday(&start_t, NULL);
write(tmpfile, strout, 16384);
gettimeofday(&elapse_t, NULL);
close(tmpfile);
printf("\tone 16k o_sync write ");
print_elapse(start_t, elapse_t);
printf("\n");
/* 2*8k o_sync writes */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
die("can't open /var/tmp/test_fsync.out");
gettimeofday(&start_t, NULL);
write(tmpfile, strout, 8192);
write(tmpfile, strout, 8192);
gettimeofday(&elapse_t, NULL);
close(tmpfile);
printf("\ttwo 8k o_sync writes ");
print_elapse(start_t, elapse_t);
printf("\n");
printf("\nCompare file sync methods with one 8k write:\n");
#ifdef OPEN_DATASYNC_FLAG
/* open_dsync, write */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_DSYNC)) == -1)
die("can't open /var/tmp/test_fsync.out");
gettimeofday(&start_t, NULL);
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT | O_DSYNC, 0600)) == -1)
write(tmpfile, strout, 8192);
gettimeofday(&elapse_t, NULL);
close(tmpfile);
printf("\topen o_dsync, write ");
print_elapse(start_t, elapse_t);
#else
printf("\t(o_dsync unavailable) ");
#endif
printf("\n");
/* open_fsync, write */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
die("can't open /var/tmp/test_fsync.out");
write(tmpfile, &strout, 200);
gettimeofday(&start_t, NULL);
write(tmpfile, strout, 8192);
gettimeofday(&elapse_t, NULL);
close(tmpfile);
printf("\topen o_sync, write ");
print_elapse(start_t, elapse_t);
printf("\n");
#ifdef HAVE_FDATASYNC
/* write, fdatasync */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
die("can't open /var/tmp/test_fsync.out");
gettimeofday(&start_t, NULL);
write(tmpfile, strout, 8192);
fdatasync(tmpfile);
gettimeofday(&elapse_t, NULL);
unlink("/var/tmp/test_fsync.out");
printf("open o_dsync, write ");
close(tmpfile);
printf("\twrite, fdatasync ");
print_elapse(start_t, elapse_t);
#else
printf("o_dsync unavailable ");
printf("\t(fdatasync unavailable)");
#endif
printf("\n");
/* open_fsync, write */
/* write, fsync, close */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
die("can't open /var/tmp/test_fsync.out");
gettimeofday(&start_t, NULL);
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT | OPEN_SYNC_FLAG, 0600)) == -1)
write(tmpfile, strout, 8192);
fsync(tmpfile);
gettimeofday(&elapse_t, NULL);
close(tmpfile);
printf("\twrite, fsync, ");
print_elapse(start_t, elapse_t);
printf("\n");
printf("\nCompare file sync methods with 2 8k writes:\n");
#ifdef OPEN_DATASYNC_FLAG
/* open_dsync, write */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_DSYNC)) == -1)
die("can't open /var/tmp/test_fsync.out");
write(tmpfile, &strout, 200);
gettimeofday(&start_t, NULL);
write(tmpfile, strout, 8192);
write(tmpfile, strout, 8192);
gettimeofday(&elapse_t, NULL);
close(tmpfile);
printf("\topen o_dsync, write ");
print_elapse(start_t, elapse_t);
#else
printf("\t(o_dsync unavailable) ");
#endif
printf("\n");
/* open_fsync, write */
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
die("can't open /var/tmp/test_fsync.out");
gettimeofday(&start_t, NULL);
write(tmpfile, strout, 8192);
write(tmpfile, strout, 8192);
gettimeofday(&elapse_t, NULL);
unlink("/var/tmp/test_fsync.out");
printf("open o_fsync, write ");
close(tmpfile);
printf("\topen o_sync, write ");
print_elapse(start_t, elapse_t);
printf("\n");
#ifdef HAVE_FDATASYNC
/* write, fdatasync */
gettimeofday(&start_t, NULL);
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
die("can't open /var/tmp/test_fsync.out");
write(tmpfile, &strout, 200);
gettimeofday(&start_t, NULL);
write(tmpfile, strout, 8192);
write(tmpfile, strout, 8192);
fdatasync(tmpfile);
close(tmpfile);
gettimeofday(&elapse_t, NULL);
unlink("/var/tmp/test_fsync.out");
printf("write, fdatasync ");
close(tmpfile);
printf("\twrite, fdatasync ");
print_elapse(start_t, elapse_t);
#else
printf("fdatasync unavailable ");
printf("\t(fdatasync unavailable)");
#endif
printf("\n");
/* write, fsync, close */
gettimeofday(&start_t, NULL);
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
die("can't open /var/tmp/test_fsync.out");
write(tmpfile, &strout, 200);
gettimeofday(&start_t, NULL);
write(tmpfile, strout, 8192);
write(tmpfile, strout, 8192);
fsync(tmpfile);
close(tmpfile);
gettimeofday(&elapse_t, NULL);
unlink("/var/tmp/test_fsync.out");
printf("write, fsync, ");
close(tmpfile);
printf("\twrite, fsync, ");
print_elapse(start_t, elapse_t);
printf("\n");
unlink("/var/tmp/test_fsync.out");
return 0;
}
void print_elapse(struct timeval start_t, struct timeval elapse_t)
void
print_elapse(struct timeval start_t, struct timeval elapse_t)
{
if (elapse_t.tv_usec < start_t.tv_usec)
{
......@@ -152,10 +246,11 @@ void print_elapse(struct timeval start_t, struct timeval elapse_t)
}
printf("%ld.%06ld", (long) (elapse_t.tv_sec - start_t.tv_sec),
(long) (elapse_t.tv_usec - start_t.tv_usec));
(long) (elapse_t.tv_usec - start_t.tv_usec));
}
void die(char *str)
void
die(char *str)
{
fprintf(stderr, "%s", str);
exit(1);
......
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