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Simplify test_fsync duration computation.

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This commit is contained in:
Bruce Momjian
2010-07-04 13:42:51 +00:00
parent 7341a8cab2
commit 2330d9c147
1 changed files with 6 additions and 13 deletions
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19
src/tools/fsync/test_fsync.c
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@ -1,5 +1,5 @@
/* /*
* $PostgreSQL: pgsql/src/tools/fsync/test_fsync.c,v 1.28 2010/07/04 01:50:29 momjian Exp $ * $PostgreSQL: pgsql/src/tools/fsync/test_fsync.c,v 1.29 2010/07/04 13:42:51 momjian Exp $
* *
* *
* test_fsync.c * test_fsync.c
@ -79,7 +79,7 @@ main(int argc, char *argv[])
/* /*
* Simple write * Simple write
*/ */
printf("Simple write timing:\n"); printf("Simple write:\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++)
@ -271,7 +271,7 @@ main(int argc, char *argv[])
/* /*
* Compare 1 to 2 writes * Compare 1 to 2 writes
*/ */
printf("\nCompare open_sync sizes:\n"); printf("\nCompare open_sync with different sizes:\n");
#ifdef OPEN_SYNC_FLAG #ifdef OPEN_SYNC_FLAG
/* 16k open_sync write */ /* 16k open_sync write */
@ -368,17 +368,10 @@ 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; double total_time = (stop_t.tv_sec - start_t.tv_sec) +
/* usec subtraction might be negative, e.g. 5.4 - 4.8 */
if (stop_t.tv_usec < start_t.tv_usec)
{
stop_t.tv_sec--;
stop_t.tv_usec += 1000000;
}
total_time = (stop_t.tv_sec - start_t.tv_sec) +
(stop_t.tv_usec - start_t.tv_usec) * 0.000001; (stop_t.tv_usec - start_t.tv_usec) * 0.000001;
per_second = loops / total_time; double per_second = loops / total_time;
printf("%9.3f/second\n", per_second); printf("%9.3f/second\n", per_second);
} }