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Change contrib/pg_test_fsync to control tests in terms of seconds per
test, rather than a number of test cycles. Changes -o/cycles option to -s/seconds.
This commit is contained in:
Bruce Momjian
@ -27,15 +27,31 @@
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#define NA_FORMAT "%18s"
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#define OPS_FORMAT "%9.3f ops/sec"
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/* These are macros to avoid timing the function call overhead. */
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#define START_TIMER \
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do { \
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alarm_triggered = false; \
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alarm(secs_per_test); \
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gettimeofday(&start_t, NULL); \
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} while (0)
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#define STOP_TIMER \
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do { \
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gettimeofday(&stop_t, NULL); \
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print_elapse(start_t, stop_t, ops); \
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} while (0)
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static const char *progname;
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static int ops_per_test = 2000;
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static int secs_per_test = 2;
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static int needs_unlink = 0;
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static char full_buf[XLOG_SEG_SIZE],
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*buf,
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*filename = FSYNC_FILENAME;
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static struct timeval start_t,
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stop_t;
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static bool alarm_triggered = false;
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static void handle_args(int argc, char *argv[]);
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@ -46,12 +62,13 @@ static void test_sync(int writes_per_op);
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static void test_open_syncs(void);
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static void test_open_sync(const char *msg, int writes_size);
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static void test_file_descriptor_sync(void);
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static void process_alarm(int sig);
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static void signal_cleanup(int sig);
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#ifdef HAVE_FSYNC_WRITETHROUGH
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static int pg_fsync_writethrough(int fd);
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#endif
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static void print_elapse(struct timeval start_t, struct timeval stop_t);
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static void print_elapse(struct timeval start_t, struct timeval stop_t, int ops);
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static void die(const char *str);
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@ -65,6 +82,7 @@ main(int argc, char *argv[])
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/* Prevent leaving behind the test file */
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signal(SIGINT, signal_cleanup);
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signal(SIGTERM, signal_cleanup);
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signal(SIGALRM, process_alarm);
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#ifdef SIGHUP
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/* Not defined on win32 */
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signal(SIGHUP, signal_cleanup);
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@ -96,7 +114,7 @@ handle_args(int argc, char *argv[])
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{
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static struct option long_options[] = {
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{"filename", required_argument, NULL, 'f'},
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{"ops-per-test", required_argument, NULL, 'o'},
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{"secs-per-test", required_argument, NULL, 's'},
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{NULL, 0, NULL, 0}
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};
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int option; /* Command line option */
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@ -107,7 +125,7 @@ handle_args(int argc, char *argv[])
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if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-h") == 0 ||
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strcmp(argv[1], "-?") == 0)
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{
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printf("Usage: %s [-f FILENAME] [-o OPS-PER-TEST]\n", progname);
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printf("Usage: %s [-f FILENAME] [-s SECS-PER-TEST]\n", progname);
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exit(0);
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}
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if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
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@ -117,7 +135,7 @@ handle_args(int argc, char *argv[])
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}
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}
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while ((option = getopt_long(argc, argv, "f:o:",
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while ((option = getopt_long(argc, argv, "f:s:",
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long_options, &optindex)) != -1)
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{
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switch (option)
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@ -126,8 +144,8 @@ handle_args(int argc, char *argv[])
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filename = strdup(optarg);
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break;
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case 'o':
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ops_per_test = atoi(optarg);
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case 's':
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secs_per_test = atoi(optarg);
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break;
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default:
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@ -148,7 +166,7 @@ handle_args(int argc, char *argv[])
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exit(1);
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}
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printf("%d operations per test\n", ops_per_test);
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printf("%d seconds per test\n", secs_per_test);
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#if PG_O_DIRECT != 0
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printf("O_DIRECT supported on this platform for open_datasync and open_sync.\n");
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#else
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@ -220,8 +238,8 @@ test_sync(int writes_per_op)
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{
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if ((tmpfile = open(filename, O_RDWR | O_DSYNC | PG_O_DIRECT, 0)) == -1)
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die("could not open output file");
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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for (writes = 0; writes < writes_per_op; writes++)
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if (write(tmpfile, buf, XLOG_BLCKSZ) != XLOG_BLCKSZ)
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@ -229,9 +247,8 @@ test_sync(int writes_per_op)
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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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STOP_TIMER;
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close(tmpfile);
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print_elapse(start_t, stop_t);
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}
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#else
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printf(NA_FORMAT, "n/a\n");
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@ -246,8 +263,8 @@ test_sync(int writes_per_op)
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#ifdef HAVE_FDATASYNC
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("could not open output file");
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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for (writes = 0; writes < writes_per_op; writes++)
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if (write(tmpfile, buf, XLOG_BLCKSZ) != XLOG_BLCKSZ)
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@ -256,9 +273,8 @@ test_sync(int writes_per_op)
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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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STOP_TIMER;
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close(tmpfile);
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print_elapse(start_t, stop_t);
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#else
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printf(NA_FORMAT, "n/a\n");
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#endif
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@ -271,8 +287,8 @@ test_sync(int writes_per_op)
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("could not open output file");
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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for (writes = 0; writes < writes_per_op; writes++)
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if (write(tmpfile, buf, XLOG_BLCKSZ) != XLOG_BLCKSZ)
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@ -282,9 +298,8 @@ test_sync(int writes_per_op)
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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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STOP_TIMER;
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close(tmpfile);
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print_elapse(start_t, stop_t);
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/*
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* If fsync_writethrough is available, test as well
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@ -295,8 +310,8 @@ test_sync(int writes_per_op)
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#ifdef HAVE_FSYNC_WRITETHROUGH
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("could not open output file");
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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for (writes = 0; writes < writes_per_op; writes++)
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if (write(tmpfile, buf, XLOG_BLCKSZ) != XLOG_BLCKSZ)
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@ -306,9 +321,8 @@ test_sync(int writes_per_op)
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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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STOP_TIMER;
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close(tmpfile);
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print_elapse(start_t, stop_t);
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#else
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printf(NA_FORMAT, "n/a\n");
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#endif
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@ -327,8 +341,8 @@ test_sync(int writes_per_op)
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}
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else
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{
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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for (writes = 0; writes < writes_per_op; writes++)
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if (write(tmpfile, buf, XLOG_BLCKSZ) != XLOG_BLCKSZ)
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@ -336,9 +350,8 @@ test_sync(int writes_per_op)
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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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STOP_TIMER;
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close(tmpfile);
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print_elapse(start_t, stop_t);
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}
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#else
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printf(NA_FORMAT, "n/a\n");
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@ -385,8 +398,8 @@ test_open_sync(const char *msg, int writes_size)
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printf(NA_FORMAT, "n/a*\n");
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else
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{
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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for (writes = 0; writes < 16 / writes_size; writes++)
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if (write(tmpfile, buf, writes_size * 1024) !=
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@ -395,9 +408,8 @@ test_open_sync(const char *msg, int writes_size)
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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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STOP_TIMER;
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close(tmpfile);
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print_elapse(start_t, stop_t);
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}
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#else
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printf(NA_FORMAT, "n/a\n");
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@ -427,8 +439,8 @@ test_file_descriptor_sync(void)
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printf(LABEL_FORMAT, "write, fsync, close");
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fflush(stdout);
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("could not open output file");
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@ -446,8 +458,7 @@ test_file_descriptor_sync(void)
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die("could not open output file");
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close(tmpfile);
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}
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gettimeofday(&stop_t, NULL);
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print_elapse(start_t, stop_t);
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STOP_TIMER;
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/*
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* Now open, write, close, open again and fsync This simulates processes
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@ -456,8 +467,8 @@ test_file_descriptor_sync(void)
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printf(LABEL_FORMAT, "write, close, fsync");
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fflush(stdout);
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("could not open output file");
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@ -471,9 +482,7 @@ test_file_descriptor_sync(void)
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die("fsync failed");
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close(tmpfile);
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}
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gettimeofday(&stop_t, NULL);
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print_elapse(start_t, stop_t);
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STOP_TIMER;
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}
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static void
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@ -489,8 +498,8 @@ test_non_sync(void)
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printf(LABEL_FORMAT, "write");
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fflush(stdout);
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gettimeofday(&start_t, NULL);
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for (ops = 0; ops < ops_per_test; ops++)
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START_TIMER;
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for (ops = 0; alarm_triggered == false; ops++)
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{
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if ((tmpfile = open(filename, O_RDWR, 0)) == -1)
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die("could not open output file");
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@ -498,8 +507,7 @@ test_non_sync(void)
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die("write failed");
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close(tmpfile);
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}
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gettimeofday(&stop_t, NULL);
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print_elapse(start_t, stop_t);
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STOP_TIMER;
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}
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static void
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@ -533,15 +541,21 @@ pg_fsync_writethrough(int fd)
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* print out the writes per second for tests
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*/
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static void
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print_elapse(struct timeval start_t, struct timeval stop_t)
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print_elapse(struct timeval start_t, struct timeval stop_t, int ops)
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{
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double total_time = (stop_t.tv_sec - start_t.tv_sec) +
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(stop_t.tv_usec - start_t.tv_usec) * 0.000001;
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double per_second = ops_per_test / total_time;
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double per_second = ops / total_time;
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printf(OPS_FORMAT "\n", per_second);
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}
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static void
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process_alarm(int sig)
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{
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alarm_triggered = true;
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}
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static void
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die(const char *str)
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{
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