static void setalarm(int seconds);
static void *threadRun(void *arg);
+static void doLog(TState *thread, CState *st, FILE *logfile, instr_time *now,
+ AggVals *agg);
+
static void
usage(void)
{
PGresult *res;
Command **commands;
bool trans_needs_throttle = false;
+ instr_time now;
+
+ /*
+ * gettimeofday() isn't free, so we get the current timestamp lazily the
+ * first time it's needed, and reuse the same value throughout this
+ * function after that. This also ensures that e.g. the calculated latency
+ * reported in the log file and in the totals are the same. Zero means
+ * "not set yet".
+ */
+ INSTR_TIME_SET_ZERO(now);
top:
commands = sql_files[st->use_file];
if (st->sleeping)
{ /* are we sleeping? */
- instr_time now;
int64 now_us;
- INSTR_TIME_SET_CURRENT(now);
+ if (INSTR_TIME_IS_ZERO(now))
+ INSTR_TIME_SET_CURRENT(now);
now_us = INSTR_TIME_GET_MICROSEC(now);
if (st->txn_scheduled <= now_us)
{
if (st->listen)
{ /* are we receiver? */
- instr_time now;
- bool now_valid = false;
-
- INSTR_TIME_SET_ZERO(now); /* initialize to keep compiler quiet */
-
if (commands[st->state]->type == SQL_COMMAND)
{
if (debug)
{
int cnum = commands[st->state]->command_num;
- if (!now_valid)
- {
+ if (INSTR_TIME_IS_ZERO(now))
INSTR_TIME_SET_CURRENT(now);
- now_valid = true;
- }
INSTR_TIME_ACCUM_DIFF(thread->exec_elapsed[cnum],
now, st->stmt_begin);
thread->exec_count[cnum]++;
}
- /* transaction finished: record latency under progress or throttling */
- if ((progress || throttle_delay) && commands[st->state + 1] == NULL)
+ /* transaction finished: calculate latency and log the transaction */
+ if (commands[st->state + 1] == NULL)
{
- int64 latency;
-
- if (!now_valid)
+ /* only calculate latency if an option is used that needs it */
+ if (progress || throttle_delay)
{
- INSTR_TIME_SET_CURRENT(now);
- now_valid = true;
- }
-
- latency = INSTR_TIME_GET_MICROSEC(now) - st->txn_scheduled;
+ int64 latency;
- st->txn_latencies += latency;
-
- /*
- * XXX In a long benchmark run of high-latency transactions, this
- * int64 addition eventually overflows. For example, 100 threads
- * running 10s transactions will overflow it in 2.56 hours. With
- * a more-typical OLTP workload of .1s transactions, overflow
- * would take 256 hours.
- */
- st->txn_sqlats += latency * latency;
- }
-
- /*
- * if transaction finished, record the time it took in the log
- */
- if (logfile && commands[st->state + 1] == NULL)
- {
- double lag;
- double latency;
-
- /*
- * write the log entry if this row belongs to the random sample,
- * or no sampling rate was given which means log everything.
- */
- if (sample_rate == 0.0 ||
- pg_erand48(thread->random_state) <= sample_rate)
- {
- if (!now_valid)
- {
+ if (INSTR_TIME_IS_ZERO(now))
INSTR_TIME_SET_CURRENT(now);
- now_valid = true;
- }
- latency = (double) (INSTR_TIME_GET_MICROSEC(now) - st->txn_scheduled);
- lag = (double) (INSTR_TIME_GET_MICROSEC(st->txn_begin) - st->txn_scheduled);
-
- /* should we aggregate the results or not? */
- if (agg_interval > 0)
- {
- /*
- * are we still in the same interval? if yes, accumulate
- * the values (print them otherwise)
- */
- if (agg->start_time + agg_interval >= INSTR_TIME_GET_DOUBLE(now))
- {
- agg->cnt += 1;
- agg->sum_latency += latency;
- agg->sum2_latency += latency * latency;
-
- /* first in this aggregation interval */
- if ((agg->cnt == 1) || (latency < agg->min_latency))
- agg->min_latency = latency;
-
- if ((agg->cnt == 1) || (latency > agg->max_latency))
- agg->max_latency = latency;
-
- /* and the same for schedule lag */
- if (throttle_delay)
- {
- agg->sum_lag += lag;
- agg->sum2_lag += lag * lag;
-
- if ((agg->cnt == 1) || (lag < agg->min_lag))
- agg->min_lag = lag;
- if ((agg->cnt == 1) || (lag > agg->max_lag))
- agg->max_lag = lag;
- }
- }
- else
- {
- /*
- * Loop until we reach the interval of the current
- * transaction (and print all the empty intervals in
- * between).
- */
- while (agg->start_time + agg_interval < INSTR_TIME_GET_DOUBLE(now))
- {
- /*
- * This is a non-Windows branch (thanks to the
- * ifdef in usage), so we don't need to handle
- * this in a special way (see below).
- */
- fprintf(logfile, "%ld %d %.0f %.0f %.0f %.0f",
- agg->start_time,
- agg->cnt,
- agg->sum_latency,
- agg->sum2_latency,
- agg->min_latency,
- agg->max_latency);
- if (throttle_delay)
- fprintf(logfile, " %.0f %.0f %.0f %.0f",
- agg->sum_lag,
- agg->sum2_lag,
- agg->min_lag,
- agg->max_lag);
- fputc('\n', logfile);
-
- /* move to the next inteval */
- agg->start_time = agg->start_time + agg_interval;
-
- /* reset for "no transaction" intervals */
- agg->cnt = 0;
- agg->min_latency = 0;
- agg->max_latency = 0;
- agg->sum_latency = 0;
- agg->sum2_latency = 0;
- agg->min_lag = 0;
- agg->max_lag = 0;
- agg->sum_lag = 0;
- agg->sum2_lag = 0;
- }
-
- /*
- * and now update the reset values (include the
- * current)
- */
- agg->cnt = 1;
- agg->min_latency = latency;
- agg->max_latency = latency;
- agg->sum_latency = latency;
- agg->sum2_latency = latency * latency;
- agg->min_lag = lag;
- agg->max_lag = lag;
- agg->sum_lag = lag;
- agg->sum2_lag = lag * lag;
- }
- }
- else
- {
- /* no, print raw transactions */
-#ifndef WIN32
-
- /*
- * This is more than we really ought to know about
- * instr_time
- */
- fprintf(logfile, "%d %d %.0f %d %ld %ld",
- st->id, st->cnt, latency, st->use_file,
- (long) now.tv_sec, (long) now.tv_usec);
-#else
-
- /*
- * On Windows, instr_time doesn't provide a timestamp
- * anyway
- */
- fprintf(logfile, "%d %d %.0f %d 0 0",
- st->id, st->cnt, latency, st->use_file);
-#endif
- if (throttle_delay)
- fprintf(logfile, " %.0f", lag);
- fputc('\n', logfile);
- }
+ latency = INSTR_TIME_GET_MICROSEC(now) - st->txn_scheduled;
+
+ st->txn_latencies += latency;
+
+ /*
+ * XXX In a long benchmark run of high-latency transactions,
+ * this int64 addition eventually overflows. For example, 100
+ * threads running 10s transactions will overflow it in 2.56
+ * hours. With a more-typical OLTP workload of .1s
+ * transactions, overflow would take 256 hours.
+ */
+ st->txn_sqlats += latency * latency;
}
+
+ /* record the time it took in the log */
+ if (logfile)
+ doLog(thread, st, logfile, &now, agg);
}
if (commands[st->state]->type == SQL_COMMAND)
return true;
}
+/*
+ * print log entry after completing one transaction.
+ */
+static void
+doLog(TState *thread, CState *st, FILE *logfile, instr_time *now, AggVals *agg)
+{
+ double lag;
+ double latency;
+
+ /*
+ * Skip the log entry if sampling is enabled and this row doesn't belong
+ * to the random sample.
+ */
+ if (sample_rate != 0.0 &&
+ pg_erand48(thread->random_state) > sample_rate)
+ return;
+
+ if (INSTR_TIME_IS_ZERO(*now))
+ INSTR_TIME_SET_CURRENT(*now);
+
+ latency = (double) (INSTR_TIME_GET_MICROSEC(*now) - st->txn_scheduled);
+ lag = (double) (INSTR_TIME_GET_MICROSEC(st->txn_begin) - st->txn_scheduled);
+
+ /* should we aggregate the results or not? */
+ if (agg_interval > 0)
+ {
+ /*
+ * Are we still in the same interval? If yes, accumulate the values
+ * (print them otherwise)
+ */
+ if (agg->start_time + agg_interval >= INSTR_TIME_GET_DOUBLE(*now))
+ {
+ agg->cnt += 1;
+ agg->sum_latency += latency;
+ agg->sum2_latency += latency * latency;
+
+ /* first in this aggregation interval */
+ if ((agg->cnt == 1) || (latency < agg->min_latency))
+ agg->min_latency = latency;
+
+ if ((agg->cnt == 1) || (latency > agg->max_latency))
+ agg->max_latency = latency;
+
+ /* and the same for schedule lag */
+ if (throttle_delay)
+ {
+ agg->sum_lag += lag;
+ agg->sum2_lag += lag * lag;
+
+ if ((agg->cnt == 1) || (lag < agg->min_lag))
+ agg->min_lag = lag;
+ if ((agg->cnt == 1) || (lag > agg->max_lag))
+ agg->max_lag = lag;
+ }
+ }
+ else
+ {
+ /*
+ * Loop until we reach the interval of the current transaction
+ * (and print all the empty intervals in between).
+ */
+ while (agg->start_time + agg_interval < INSTR_TIME_GET_DOUBLE(*now))
+ {
+ /*
+ * This is a non-Windows branch (thanks to the
+ * ifdef in usage), so we don't need to handle
+ * this in a special way (see below).
+ */
+ fprintf(logfile, "%ld %d %.0f %.0f %.0f %.0f",
+ agg->start_time,
+ agg->cnt,
+ agg->sum_latency,
+ agg->sum2_latency,
+ agg->min_latency,
+ agg->max_latency);
+ if (throttle_delay)
+ fprintf(logfile, " %.0f %.0f %.0f %.0f",
+ agg->sum_lag,
+ agg->sum2_lag,
+ agg->min_lag,
+ agg->max_lag);
+ fputc('\n', logfile);
+
+ /* move to the next inteval */
+ agg->start_time = agg->start_time + agg_interval;
+
+ /* reset for "no transaction" intervals */
+ agg->cnt = 0;
+ agg->min_latency = 0;
+ agg->max_latency = 0;
+ agg->sum_latency = 0;
+ agg->sum2_latency = 0;
+ agg->min_lag = 0;
+ agg->max_lag = 0;
+ agg->sum_lag = 0;
+ agg->sum2_lag = 0;
+ }
+
+ /* reset the values to include only the current transaction. */
+ agg->cnt = 1;
+ agg->min_latency = latency;
+ agg->max_latency = latency;
+ agg->sum_latency = latency;
+ agg->sum2_latency = latency * latency;
+ agg->min_lag = lag;
+ agg->max_lag = lag;
+ agg->sum_lag = lag;
+ agg->sum2_lag = lag * lag;
+ }
+ }
+ else
+ {
+ /* no, print raw transactions */
+#ifndef WIN32
+
+ /* This is more than we really ought to know about instr_time */
+ fprintf(logfile, "%d %d %.0f %d %ld %ld",
+ st->id, st->cnt, latency, st->use_file,
+ (long) now->tv_sec, (long) now->tv_usec);
+#else
+
+ /* On Windows, instr_time doesn't provide a timestamp anyway */
+ fprintf(logfile, "%d %d %.0f %d 0 0",
+ st->id, st->cnt, latency, st->use_file);
+#endif
+ if (throttle_delay)
+ fprintf(logfile, " %.0f", lag);
+ fputc('\n', logfile);
+ }
+}
+
/* discard connections */
static void
disconnect_all(CState *state, int length)
projects / postgresql.git / commitdiff