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:
This commit is contained in:
Bruce Momjian
parent
5ddecd1e27
commit
b2906c5be3
@ -6,6 +6,7 @@
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#include "../../include/pg_config.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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@ -26,124 +27,217 @@
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#endif
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#endif
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void die(char *str);
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void print_elapse(struct timeval start_t, struct timeval elapse_t);
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void die(char *str);
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void print_elapse(struct timeval start_t, struct timeval elapse_t);
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int main(int argc, char *argv[])
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int
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main(int argc, char *argv[])
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{
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struct timeval start_t;
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struct timeval elapse_t;
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int tmpfile;
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char *strout = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
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int tmpfile,
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i;
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char *strout = (char *) malloc(65536);
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for (i = 0; i < 65536; i++)
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strout[i] = 'a';
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, S_IRUSR | S_IWUSR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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write(tmpfile, strout, 65536);
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fsync(tmpfile); /* fsync so later fsync's don't have to do
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* it */
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close(tmpfile);
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printf("Simple write timing:\n");
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/* write only */
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/* write only */
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gettimeofday(&start_t, NULL);
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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write(tmpfile, &strout, 200);
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close(tmpfile);
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write(tmpfile, strout, 8192);
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close(tmpfile);
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gettimeofday(&elapse_t, NULL);
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unlink("/var/tmp/test_fsync.out");
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printf("write ");
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printf("\twrite ");
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print_elapse(start_t, elapse_t);
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printf("\n\n");
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printf("Compare fsync before and after write's close:\n");
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/* write, fsync, close */
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gettimeofday(&start_t, NULL);
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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write(tmpfile, &strout, 200);
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write(tmpfile, strout, 8192);
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fsync(tmpfile);
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close(tmpfile);
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close(tmpfile);
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gettimeofday(&elapse_t, NULL);
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unlink("/var/tmp/test_fsync.out");
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printf("write, fsync, close ");
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printf("\twrite, fsync, close ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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/* write, close, fsync */
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gettimeofday(&start_t, NULL);
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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write(tmpfile, &strout, 200);
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write(tmpfile, strout, 8192);
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close(tmpfile);
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/* reopen file */
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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fsync(tmpfile);
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close(tmpfile);
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close(tmpfile);
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gettimeofday(&elapse_t, NULL);
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unlink("/var/tmp/test_fsync.out");
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printf("write, close, fsync ");
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printf("\twrite, close, fsync ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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printf("\nTest file sync methods:\n");
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printf("\nCompare one o_sync write to two:\n");
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/* 16k o_sync write */
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 16384);
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gettimeofday(&elapse_t, NULL);
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close(tmpfile);
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printf("\tone 16k o_sync write ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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/* 2*8k o_sync writes */
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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write(tmpfile, strout, 8192);
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gettimeofday(&elapse_t, NULL);
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close(tmpfile);
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printf("\ttwo 8k o_sync writes ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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printf("\nCompare file sync methods with one 8k write:\n");
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#ifdef OPEN_DATASYNC_FLAG
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/* open_dsync, write */
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gettimeofday(&start_t, NULL);
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT | O_DSYNC, 0600)) == -1)
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_DSYNC)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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write(tmpfile, &strout, 200);
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close(tmpfile);
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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gettimeofday(&elapse_t, NULL);
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unlink("/var/tmp/test_fsync.out");
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printf("open o_dsync, write ");
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close(tmpfile);
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printf("\topen o_dsync, write ");
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print_elapse(start_t, elapse_t);
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#else
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printf("o_dsync unavailable ");
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printf("\t(o_dsync unavailable) ");
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#endif
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printf("\n");
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/* open_fsync, write */
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gettimeofday(&start_t, NULL);
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT | OPEN_SYNC_FLAG, 0600)) == -1)
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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write(tmpfile, &strout, 200);
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close(tmpfile);
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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gettimeofday(&elapse_t, NULL);
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unlink("/var/tmp/test_fsync.out");
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printf("open o_fsync, write ");
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close(tmpfile);
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printf("\topen o_sync, write ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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#ifdef HAVE_FDATASYNC
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/* write, fdatasync */
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gettimeofday(&start_t, NULL);
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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write(tmpfile, &strout, 200);
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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fdatasync(tmpfile);
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close(tmpfile);
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gettimeofday(&elapse_t, NULL);
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unlink("/var/tmp/test_fsync.out");
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printf("write, fdatasync ");
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close(tmpfile);
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printf("\twrite, fdatasync ");
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print_elapse(start_t, elapse_t);
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#else
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printf("fdatasync unavailable ");
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printf("\t(fdatasync unavailable)");
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#endif
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printf("\n");
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/* write, fsync, close */
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gettimeofday(&start_t, NULL);
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_CREAT, 0600)) == -1)
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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write(tmpfile, &strout, 200);
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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fsync(tmpfile);
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close(tmpfile);
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gettimeofday(&elapse_t, NULL);
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unlink("/var/tmp/test_fsync.out");
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printf("write, fsync, ");
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close(tmpfile);
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printf("\twrite, fsync, ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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printf("\nCompare file sync methods with 2 8k writes:\n");
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#ifdef OPEN_DATASYNC_FLAG
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/* open_dsync, write */
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | O_DSYNC)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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write(tmpfile, strout, 8192);
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gettimeofday(&elapse_t, NULL);
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close(tmpfile);
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printf("\topen o_dsync, write ");
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print_elapse(start_t, elapse_t);
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#else
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printf("\t(o_dsync unavailable) ");
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#endif
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printf("\n");
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/* open_fsync, write */
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR | OPEN_SYNC_FLAG)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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write(tmpfile, strout, 8192);
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gettimeofday(&elapse_t, NULL);
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close(tmpfile);
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printf("\topen o_sync, write ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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#ifdef HAVE_FDATASYNC
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/* write, fdatasync */
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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write(tmpfile, strout, 8192);
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fdatasync(tmpfile);
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gettimeofday(&elapse_t, NULL);
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close(tmpfile);
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printf("\twrite, fdatasync ");
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print_elapse(start_t, elapse_t);
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#else
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printf("\t(fdatasync unavailable)");
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#endif
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printf("\n");
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/* write, fsync, close */
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if ((tmpfile = open("/var/tmp/test_fsync.out", O_RDWR)) == -1)
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die("can't open /var/tmp/test_fsync.out");
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gettimeofday(&start_t, NULL);
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write(tmpfile, strout, 8192);
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write(tmpfile, strout, 8192);
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fsync(tmpfile);
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gettimeofday(&elapse_t, NULL);
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close(tmpfile);
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printf("\twrite, fsync, ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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unlink("/var/tmp/test_fsync.out");
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return 0;
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}
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void print_elapse(struct timeval start_t, struct timeval elapse_t)
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void
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print_elapse(struct timeval start_t, struct timeval elapse_t)
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{
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if (elapse_t.tv_usec < start_t.tv_usec)
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{
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@ -152,10 +246,11 @@ void print_elapse(struct timeval start_t, struct timeval elapse_t)
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}
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printf("%ld.%06ld", (long) (elapse_t.tv_sec - start_t.tv_sec),
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(long) (elapse_t.tv_usec - start_t.tv_usec));
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(long) (elapse_t.tv_usec - start_t.tv_usec));
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}
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void die(char *str)
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void
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die(char *str)
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{
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fprintf(stderr, "%s", str);
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exit(1);
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