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| author | Bruce Momjian <bruce@momjian.us> | 2010-07-04 13:42:51 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2010-07-04 13:42:51 +0000 |
| commit | 2330d9c1475a70385b116fda6cc54ac2cc2939c4 (patch) | |
| tree | b932e55feed4136e7d9afd02d7f42aacc3456224 | |
| parent | 7341a8cab23f473dfc129fc277076b8df6e838c4 (diff) | |
| download | postgresql-2330d9c1475a70385b116fda6cc54ac2cc2939c4.tar.gz postgresql-2330d9c1475a70385b116fda6cc54ac2cc2939c4.zip | |
Simplify test_fsync duration computation.
| -rw-r--r-- | src/tools/fsync/test_fsync.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/src/tools/fsync/test_fsync.c b/src/tools/fsync/test_fsync.c index 8a258fe7172..79299152826 100644 --- a/src/tools/fsync/test_fsync.c +++ b/src/tools/fsync/test_fsync.c @@ -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 @@ -79,7 +79,7 @@ main(int argc, char *argv[]) /* * Simple write */ - printf("Simple write timing:\n"); + printf("Simple write:\n"); /* write only */ gettimeofday(&start_t, NULL); for (i = 0; i < loops; i++) @@ -271,7 +271,7 @@ main(int argc, char *argv[]) /* * Compare 1 to 2 writes */ - printf("\nCompare open_sync sizes:\n"); + printf("\nCompare open_sync with different sizes:\n"); #ifdef OPEN_SYNC_FLAG /* 16k open_sync write */ @@ -368,17 +368,10 @@ main(int argc, char *argv[]) void print_elapse(struct timeval start_t, struct timeval stop_t) { - double total_time, per_second; - - 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) + + double total_time = (stop_t.tv_sec - start_t.tv_sec) + + /* usec subtraction might be negative, e.g. 5.4 - 4.8 */ (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); } |