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Report test_fynsc times in tests per second, instead of total seconds.

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This commit is contained in:
Bruce Momjian 2010-07-04 01:50:29 +00:00
parent a520b78f3e
commit 7341a8cab2
1 changed files with 32 additions and 23 deletions
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55
src/tools/fsync/test_fsync.c
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@ -1,5 +1,5 @@
/* /*
* $PostgreSQL: pgsql/src/tools/fsync/test_fsync.c,v 1.27 2010/02/26 02:01:39 momjian Exp $ * $PostgreSQL: pgsql/src/tools/fsync/test_fsync.c,v 1.28 2010/07/04 01:50:29 momjian Exp $
* *
* *
* test_fsync.c * test_fsync.c
@ -34,6 +34,8 @@
#define LABEL_FORMAT "\t%-30s" #define LABEL_FORMAT "\t%-30s"
int loops = 10000;
void die(char *str); void die(char *str);
void print_elapse(struct timeval start_t, struct timeval stop_t); void print_elapse(struct timeval start_t, struct timeval stop_t);
@ -43,8 +45,7 @@ main(int argc, char *argv[])
struct timeval start_t; struct timeval start_t;
struct timeval stop_t; struct timeval stop_t;
int tmpfile, int tmpfile,
i, i;
loops = 5000;
char *full_buf = (char *) malloc(XLOG_SEG_SIZE), char *full_buf = (char *) malloc(XLOG_SEG_SIZE),
*buf; *buf;
char *filename = FSYNC_FILENAME; char *filename = FSYNC_FILENAME;
@ -73,10 +74,12 @@ main(int argc, char *argv[])
buf = (char *) TYPEALIGN(ALIGNOF_XLOG_BUFFER, full_buf); buf = (char *) TYPEALIGN(ALIGNOF_XLOG_BUFFER, full_buf);
printf("Loops = %d\n\n", loops);
/* /*
* Simple write * Simple write
*/ */
printf("Simple 8k write timing:\n"); printf("Simple write timing:\n");
/* write only */ /* write only */
gettimeofday(&start_t, NULL); gettimeofday(&start_t, NULL);
for (i = 0; i < loops; i++) for (i = 0; i < loops; i++)
@ -88,13 +91,13 @@ main(int argc, char *argv[])
close(tmpfile); close(tmpfile);
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
printf(LABEL_FORMAT, "write"); printf(LABEL_FORMAT, "8k write");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
/* /*
* Compare file sync methods with one 8k write * Compare file sync methods with one 8k write
*/ */
printf("\nCompare file sync methods using one 8k write:\n"); printf("\nCompare file sync methods using one write:\n");
#ifdef OPEN_DATASYNC_FLAG #ifdef OPEN_DATASYNC_FLAG
/* open_dsync, write */ /* open_dsync, write */
@ -110,7 +113,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "open_datasync write"); printf(LABEL_FORMAT, "open_datasync 8k write");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
#else #else
printf("\t(open_datasync unavailable)\n"); printf("\t(open_datasync unavailable)\n");
@ -130,7 +133,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "open_sync write"); printf(LABEL_FORMAT, "open_sync 8k write");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
#else #else
printf("\t(open_sync unavailable)\n"); printf("\t(open_sync unavailable)\n");
@ -151,7 +154,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "write, fdatasync"); printf(LABEL_FORMAT, "8k write, fdatasync");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
#else #else
printf("\t(fdatasync unavailable)\n"); printf("\t(fdatasync unavailable)\n");
@ -172,13 +175,13 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "write, fsync"); printf(LABEL_FORMAT, "8k write, fsync");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
/* /*
* Compare file sync methods with two 8k write * Compare file sync methods with two 8k write
*/ */
printf("\nCompare file sync methods using two 8k writes:\n"); printf("\nCompare file sync methods using two writes:\n");
#ifdef OPEN_DATASYNC_FLAG #ifdef OPEN_DATASYNC_FLAG
/* open_dsync, write */ /* open_dsync, write */
@ -196,7 +199,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "open_datasync write, write"); printf(LABEL_FORMAT, "2 open_datasync 8k writes");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
#else #else
printf("\t(open_datasync unavailable)\n"); printf("\t(open_datasync unavailable)\n");
@ -218,7 +221,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "open_sync write, write"); printf(LABEL_FORMAT, "2 open_sync 8k writes");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
#endif #endif
@ -239,7 +242,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "write, write, fdatasync"); printf(LABEL_FORMAT, "8k write, 8k write, fdatasync");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
#else #else
printf("\t(fdatasync unavailable)\n"); printf("\t(fdatasync unavailable)\n");
@ -262,7 +265,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "write, write, fsync"); printf(LABEL_FORMAT, "8k write, 8k write, fsync");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
/* /*
@ -284,7 +287,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "16k open_sync write"); printf(LABEL_FORMAT, "open_sync 16k write");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
/* Two 8k open_sync writes */ /* Two 8k open_sync writes */
@ -302,7 +305,7 @@ main(int argc, char *argv[])
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
close(tmpfile); close(tmpfile);
printf(LABEL_FORMAT, "2 8k open_sync writes"); printf(LABEL_FORMAT, "2 open_sync 8k writes");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
#else #else
printf("\t(open_sync unavailable)\n"); printf("\t(open_sync unavailable)\n");
@ -311,8 +314,9 @@ main(int argc, char *argv[])
/* /*
* Fsync another file descriptor? * Fsync another file descriptor?
*/ */
printf("\nCompare fsync times on write() and new file descriptors (if the times\n"); printf("\nTest if fsync on non-write file descriptor is honored:\n");
printf("are similar, fsync() can sync data written on a different descriptor):\n"); printf("(If the times are similar, fsync() can sync data written\n");
printf("on a different descriptor.)\n");
/* write, fsync, close */ /* write, fsync, close */
gettimeofday(&start_t, NULL); gettimeofday(&start_t, NULL);
@ -331,7 +335,7 @@ main(int argc, char *argv[])
close(tmpfile); close(tmpfile);
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
printf(LABEL_FORMAT, "write, fsync, close"); printf(LABEL_FORMAT, "8k write, fsync, close");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
/* write, close, fsync */ /* write, close, fsync */
@ -351,7 +355,7 @@ main(int argc, char *argv[])
close(tmpfile); close(tmpfile);
} }
gettimeofday(&stop_t, NULL); gettimeofday(&stop_t, NULL);
printf(LABEL_FORMAT, "write, close, fsync"); printf(LABEL_FORMAT, "8k write, close, fsync");
print_elapse(start_t, stop_t); print_elapse(start_t, stop_t);
/* cleanup */ /* cleanup */
@ -364,14 +368,19 @@ main(int argc, char *argv[])
void void
print_elapse(struct timeval start_t, struct timeval stop_t) print_elapse(struct timeval start_t, struct timeval stop_t)
{ {
double total_time, per_second;
if (stop_t.tv_usec < start_t.tv_usec) if (stop_t.tv_usec < start_t.tv_usec)
{ {
stop_t.tv_sec--; stop_t.tv_sec--;
stop_t.tv_usec += 1000000; stop_t.tv_usec += 1000000;
} }
printf("%3ld.%06ld\n", (long) (stop_t.tv_sec - start_t.tv_sec), total_time = (stop_t.tv_sec - start_t.tv_sec) +
(long) (stop_t.tv_usec - start_t.tv_usec)); (stop_t.tv_usec - start_t.tv_usec) * 0.000001;
per_second = loops / total_time;
printf("%9.3f/second\n", per_second);
} }
void void