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test_fsync:
Improve test descriptions displayed during test_fsync; increase default loops to 5k.
This commit is contained in:
Bruce Momjian
parent
1a95f12702
commit
017c47bf51
@ -1,4 +1,4 @@
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$PostgreSQL: pgsql/src/tools/fsync/README,v 1.4 2008/03/21 13:23:29 momjian Exp $
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$PostgreSQL: pgsql/src/tools/fsync/README,v 1.5 2009/11/28 15:04:54 momjian Exp $
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fsync
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=====
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@ -7,5 +7,5 @@ This program tests fsync. The tests are described as part of the program output
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Usage: test_fsync [-f filename] [loops]
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Loops defaults to 1000. The default output file is /var/tmp/test_fsync.out.
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Loops defaults to 5000. The default output file is /var/tmp/test_fsync.out.
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Consider that /tmp or /var/tmp might be memory-based file systems.
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@ -1,5 +1,5 @@
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/*
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* $PostgreSQL: pgsql/src/tools/fsync/test_fsync.c,v 1.25 2009/09/21 20:20:56 momjian Exp $
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* $PostgreSQL: pgsql/src/tools/fsync/test_fsync.c,v 1.26 2009/11/28 15:04:54 momjian Exp $
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*
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*
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* test_fsync.c
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@ -30,19 +30,21 @@
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#define FSYNC_FILENAME "/var/tmp/test_fsync.out"
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#endif
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#define WRITE_SIZE (16 * 1024) /* 16k */
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#define WRITE_SIZE (8 * 1024) /* 8k */
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#define LABEL_FORMAT "\t%-30s"
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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 print_elapse(struct timeval start_t, struct timeval stop_t);
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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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struct timeval stop_t;
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int tmpfile,
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i,
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loops = 1000;
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loops = 5000;
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char *full_buf = (char *) malloc(XLOG_SEG_SIZE),
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*buf;
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char *filename = FSYNC_FILENAME;
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@ -58,13 +60,13 @@ main(int argc, char *argv[])
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loops = atoi(argv[1]);
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for (i = 0; i < XLOG_SEG_SIZE; i++)
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full_buf[i] = 'a';
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full_buf[i] = random();
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if ((tmpfile = open(filename, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR, 0)) == -1)
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die("Cannot open output file.");
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if (write(tmpfile, full_buf, XLOG_SEG_SIZE) != XLOG_SEG_SIZE)
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die("write failed");
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/* fsync so later fsync's don't have to do it */
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/* fsync now so later fsync's don't have to do it */
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if (fsync(tmpfile) != 0)
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die("fsync failed");
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close(tmpfile);
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@ -74,77 +76,48 @@ main(int argc, char *argv[])
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/*
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* Simple write
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*/
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printf("Simple write timing:\n");
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printf("Simple 8k write timing:\n");
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/* write only */
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("Cannot open output file.");
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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close(tmpfile);
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}
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gettimeofday(&elapse_t, NULL);
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printf("\twrite ");
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print_elapse(start_t, elapse_t);
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printf("\n");
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gettimeofday(&stop_t, NULL);
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printf(LABEL_FORMAT, "write");
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print_elapse(start_t, stop_t);
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/*
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* Fsync another file descriptor?
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* Compare file sync methods with one 8k write
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*/
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printf("\nCompare fsync times on write() and non-write() descriptor:\n");
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printf("If the times are similar, fsync() can sync data written\non a different descriptor.\n");
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printf("\nCompare file sync methods using one 8k write:\n");
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/* write, fsync, close */
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#ifdef OPEN_DATASYNC_FLAG
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/* open_dsync, write */
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if ((tmpfile = open(filename, O_RDWR | O_DSYNC, 0)) == -1)
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die("Cannot open output file.");
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("Cannot open output file.");
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (fsync(tmpfile) != 0)
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die("fsync failed");
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close(tmpfile);
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("Cannot open output file.");
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/* do nothing but the open/close the tests are consistent. */
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close(tmpfile);
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&elapse_t, NULL);
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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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for (i = 0; i < loops; i++)
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{
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("Cannot open output file.");
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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die("write failed");
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close(tmpfile);
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/* reopen file */
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("Cannot open output file.");
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if (fsync(tmpfile) != 0)
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die("fsync failed");
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close(tmpfile);
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}
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gettimeofday(&elapse_t, NULL);
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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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/*
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* Compare 1 to 2 writes
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*/
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printf("\nCompare one o_sync write to two:\n");
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gettimeofday(&stop_t, NULL);
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close(tmpfile);
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printf(LABEL_FORMAT, "open_datasync write");
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print_elapse(start_t, stop_t);
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#else
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printf("\t(open_datasync unavailable)\n");
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#endif
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#ifdef OPEN_SYNC_FLAG
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/* 16k o_sync write */
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/* open_fsync, write */
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if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG, 0)) == -1)
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die("Cannot open output file.");
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gettimeofday(&start_t, NULL);
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@ -155,80 +128,13 @@ main(int argc, char *argv[])
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&elapse_t, NULL);
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gettimeofday(&stop_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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/* Two 8k o_sync writes */
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if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG, 0)) == -1)
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die("Cannot open output file.");
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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die("write failed");
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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die("write failed");
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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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(LABEL_FORMAT, "open_sync write");
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print_elapse(start_t, stop_t);
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#else
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printf("\t(o_sync unavailable) ");
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printf("\t(open_sync unavailable)\n");
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#endif
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printf("\n");
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/*
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* Compare file sync methods with one 8k write
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*/
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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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if ((tmpfile = open(filename, O_RDWR | O_DSYNC, 0)) == -1)
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die("Cannot open output file.");
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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die("write failed");
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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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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#ifdef OPEN_SYNC_FLAG
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/* open_fsync, write */
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if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG, 0)) == -1)
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die("Cannot open output file.");
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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die("write failed");
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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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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#else
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printf("\t(o_sync unavailable) ");
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#endif
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printf("\n");
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#ifdef HAVE_FDATASYNC
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/* write, fdatasync */
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@ -237,20 +143,19 @@ main(int argc, char *argv[])
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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fdatasync(tmpfile);
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&elapse_t, NULL);
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gettimeofday(&stop_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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printf(LABEL_FORMAT, "write, fdatasync");
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print_elapse(start_t, stop_t);
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#else
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printf("\t(fdatasync unavailable)");
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printf("\t(fdatasync unavailable)\n");
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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(filename, O_RDWR, 0)) == -1)
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@ -258,23 +163,22 @@ main(int argc, char *argv[])
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (fsync(tmpfile) != 0)
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die("fsync failed");
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&elapse_t, NULL);
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gettimeofday(&stop_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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printf(LABEL_FORMAT, "write, fsync");
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print_elapse(start_t, stop_t);
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/*
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* Compare file sync methods with two 8k write
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*/
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printf("\nCompare file sync methods with two 8k writes:\n");
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printf("\nCompare file sync methods using two 8k writes:\n");
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#ifdef OPEN_DATASYNC_FLAG
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/* open_dsync, write */
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@ -283,21 +187,20 @@ main(int argc, char *argv[])
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&elapse_t, NULL);
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gettimeofday(&stop_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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printf(LABEL_FORMAT, "open_datasync write, write");
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print_elapse(start_t, stop_t);
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#else
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printf("\t(o_dsync unavailable) ");
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printf("\t(open_datasync unavailable)\n");
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#endif
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printf("\n");
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#ifdef OPEN_SYNC_FLAG
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/* open_fsync, write */
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@ -306,18 +209,17 @@ main(int argc, char *argv[])
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&elapse_t, NULL);
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gettimeofday(&stop_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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printf(LABEL_FORMAT, "open_sync write, write");
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print_elapse(start_t, stop_t);
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#endif
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#ifdef HAVE_FDATASYNC
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@ -327,22 +229,21 @@ main(int argc, char *argv[])
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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fdatasync(tmpfile);
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&elapse_t, NULL);
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gettimeofday(&stop_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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printf(LABEL_FORMAT, "write, write, fdatasync");
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print_elapse(start_t, stop_t);
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#else
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printf("\t(fdatasync unavailable)");
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printf("\t(fdatasync unavailable)\n");
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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(filename, O_RDWR, 0)) == -1)
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@ -350,21 +251,110 @@ main(int argc, char *argv[])
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (write(tmpfile, buf, WRITE_SIZE / 2) != WRITE_SIZE / 2)
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if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
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die("write failed");
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if (fsync(tmpfile) != 0)
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die("fsync failed");
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&elapse_t, NULL);
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gettimeofday(&stop_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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printf(LABEL_FORMAT, "write, write, fsync");
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print_elapse(start_t, stop_t);
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/*
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* Compare 1 to 2 writes
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*/
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printf("\nCompare open_sync sizes:\n");
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#ifdef OPEN_SYNC_FLAG
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/* 16k open_sync write */
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if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG, 0)) == -1)
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die("Cannot open output file.");
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gettimeofday(&start_t, NULL);
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for (i = 0; i < loops; i++)
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{
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if (write(tmpfile, buf, WRITE_SIZE * 2) != WRITE_SIZE * 2)
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die("write failed");
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if (lseek(tmpfile, 0, SEEK_SET) == -1)
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die("seek failed");
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}
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gettimeofday(&stop_t, NULL);
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close(tmpfile);
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printf(LABEL_FORMAT, "16k open_sync write");
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print_elapse(start_t, stop_t);
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/* Two 8k open_sync writes */
|
||||
if ((tmpfile = open(filename, O_RDWR | OPEN_SYNC_FLAG, 0)) == -1)
|
||||
die("Cannot open output file.");
|
||||
gettimeofday(&start_t, NULL);
|
||||
for (i = 0; i < loops; i++)
|
||||
{
|
||||
if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
|
||||
die("write failed");
|
||||
if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
|
||||
die("write failed");
|
||||
if (lseek(tmpfile, 0, SEEK_SET) == -1)
|
||||
die("seek failed");
|
||||
}
|
||||
gettimeofday(&stop_t, NULL);
|
||||
close(tmpfile);
|
||||
printf(LABEL_FORMAT, "2 8k open_sync writes");
|
||||
print_elapse(start_t, stop_t);
|
||||
#else
|
||||
printf("\t(open_sync unavailable)\n");
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Fsync another file descriptor?
|
||||
*/
|
||||
printf("\nCompare fsync times on write() and new file descriptors (if the times\n");
|
||||
printf("are similar, fsync() can sync data written on a different descriptor):\n");
|
||||
|
||||
/* write, fsync, close */
|
||||
gettimeofday(&start_t, NULL);
|
||||
for (i = 0; i < loops; i++)
|
||||
{
|
||||
if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
|
||||
die("Cannot open output file.");
|
||||
if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
|
||||
die("write failed");
|
||||
if (fsync(tmpfile) != 0)
|
||||
die("fsync failed");
|
||||
close(tmpfile);
|
||||
if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
|
||||
die("Cannot open output file.");
|
||||
/* do nothing but the open/close the tests are consistent. */
|
||||
close(tmpfile);
|
||||
}
|
||||
gettimeofday(&stop_t, NULL);
|
||||
printf(LABEL_FORMAT, "write, fsync, close");
|
||||
print_elapse(start_t, stop_t);
|
||||
|
||||
/* write, close, fsync */
|
||||
gettimeofday(&start_t, NULL);
|
||||
for (i = 0; i < loops; i++)
|
||||
{
|
||||
if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
|
||||
die("Cannot open output file.");
|
||||
if (write(tmpfile, buf, WRITE_SIZE) != WRITE_SIZE)
|
||||
die("write failed");
|
||||
close(tmpfile);
|
||||
/* reopen file */
|
||||
if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
|
||||
die("Cannot open output file.");
|
||||
if (fsync(tmpfile) != 0)
|
||||
die("fsync failed");
|
||||
close(tmpfile);
|
||||
}
|
||||
gettimeofday(&stop_t, NULL);
|
||||
printf(LABEL_FORMAT, "write, close, fsync");
|
||||
print_elapse(start_t, stop_t);
|
||||
|
||||
/* cleanup */
|
||||
free(full_buf);
|
||||
unlink(filename);
|
||||
|
||||
@ -372,16 +362,16 @@ main(int argc, char *argv[])
|
||||
}
|
||||
|
||||
void
|
||||
print_elapse(struct timeval start_t, struct timeval elapse_t)
|
||||
print_elapse(struct timeval start_t, struct timeval stop_t)
|
||||
{
|
||||
if (elapse_t.tv_usec < start_t.tv_usec)
|
||||
if (stop_t.tv_usec < start_t.tv_usec)
|
||||
{
|
||||
elapse_t.tv_sec--;
|
||||
elapse_t.tv_usec += 1000000;
|
||||
stop_t.tv_sec--;
|
||||
stop_t.tv_usec += 1000000;
|
||||
}
|
||||
|
||||
printf("%3ld.%06ld", (long) (elapse_t.tv_sec - start_t.tv_sec),
|
||||
(long) (elapse_t.tv_usec - start_t.tv_usec));
|
||||
printf("%3ld.%06ld\n", (long) (stop_t.tv_sec - start_t.tv_sec),
|
||||
(long) (stop_t.tv_usec - start_t.tv_usec));
|
||||
}
|
||||
|
||||
void
|
||||
|
||||
Loading…
Reference in New Issue
Block a user