X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=fio.c;h=74604929f164d0785d7f0635f6e4abfe9c27bf37;hp=78dca9a09610e3140ae5eaabc7518012bff40abe;hb=d7762cf829fd3e44e50e5e2e9889b6449772097c;hpb=73170f19408559ed7e318f93b21e5cbbf13725bd

diff --git a/fio.c b/fio.c
index 78dca9a0..74604929 100644
--- a/fio.c
+++ b/fio.c
@@ -27,6 +27,7 @@
 #include <signal.h>
 #include <time.h>
 #include <locale.h>
+#include <assert.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <sys/ipc.h>
@@ -95,9 +96,9 @@ static void sig_handler(int sig)
  */
 static int check_min_rate(struct thread_data *td, struct timeval *now)
 {
+	unsigned long long bytes = 0;
 	unsigned long spent;
 	unsigned long rate;
-	int ddir = td->ddir;
 
 	/*
 	 * allow a 2 second settle period in the beginning
@@ -105,6 +106,11 @@ static int check_min_rate(struct thread_data *td, struct timeval *now)
 	if (mtime_since(&td->start, now) < 2000)
 		return 0;
 
+	if (td_read(td))
+		bytes += td->this_io_bytes[DDIR_READ];
+	if (td_write(td))
+		bytes += td->this_io_bytes[DDIR_WRITE];
+
 	/*
 	 * if rate blocks is set, sample is running
 	 */
@@ -113,14 +119,19 @@ static int check_min_rate(struct thread_data *td, struct timeval *now)
 		if (spent < td->ratecycle)
 			return 0;
 
-		rate = (td->this_io_bytes[ddir] - td->rate_bytes) / spent;
-		if (rate < td->ratemin) {
-			fprintf(f_out, "%s: min rate %u not met, got %luKiB/sec\n", td->name, td->ratemin, rate);
+		if (bytes < td->rate_bytes) {
+			fprintf(f_out, "%s: min rate %u not met\n", td->name, td->ratemin);
 			return 1;
+		} else {
+			rate = (bytes - td->rate_bytes) / spent;
+			if (rate < td->ratemin || bytes < td->rate_bytes) {
+				fprintf(f_out, "%s: min rate %u not met, got %luKiB/sec\n", td->name, td->ratemin, rate);
+				return 1;
+			}
 		}
 	}
 
-	td->rate_bytes = td->this_io_bytes[ddir];
+	td->rate_bytes = bytes;
 	memcpy(&td->lastrate, now, sizeof(*now));
 	return 0;
 }
@@ -135,47 +146,22 @@ static inline int runtime_exceeded(struct thread_data *td, struct timeval *t)
 	return 0;
 }
 
-static struct fio_file *get_next_file(struct thread_data *td)
-{
-	unsigned int old_next_file = td->next_file;
-	struct fio_file *f;
-
-	do {
-		f = &td->files[td->next_file];
-
-		td->next_file++;
-		if (td->next_file >= td->nr_files)
-			td->next_file = 0;
-
-		if (f->fd != -1)
-			break;
-
-		f = NULL;
-	} while (td->next_file != old_next_file);
-
-	return f;
-}
-
 /*
  * When job exits, we can cancel the in-flight IO if we are using async
  * io. Attempt to do so.
  */
 static void cleanup_pending_aio(struct thread_data *td)
 {
-	struct timespec ts = { .tv_sec = 0, .tv_nsec = 0};
 	struct list_head *entry, *n;
-	struct io_completion_data icd;
 	struct io_u *io_u;
 	int r;
 
 	/*
 	 * get immediately available events, if any
 	 */
-	r = td_io_getevents(td, 0, td->cur_depth, &ts);
-	if (r > 0) {
-		icd.nr = r;
-		ios_completed(td, &icd);
-	}
+	r = io_u_queued_complete(td, 0);
+	if (r < 0)
+		return;
 
 	/*
 	 * now cancel remaining active events
@@ -184,19 +170,24 @@ static void cleanup_pending_aio(struct thread_data *td)
 		list_for_each_safe(entry, n, &td->io_u_busylist) {
 			io_u = list_entry(entry, struct io_u, list);
 
-			r = td->io_ops->cancel(td, io_u);
-			if (!r)
+			/*
+			 * if the io_u isn't in flight, then that generally
+			 * means someone leaked an io_u. complain but fix
+			 * it up, so we don't stall here.
+			 */
+			if ((io_u->flags & IO_U_F_FLIGHT) == 0) {
+				log_err("fio: non-busy IO on busy list\n");
 				put_io_u(td, io_u);
+			} else {
+				r = td->io_ops->cancel(td, io_u);
+				if (!r)
+					put_io_u(td, io_u);
+			}
 		}
 	}
 
-	if (td->cur_depth) {
-		r = td_io_getevents(td, td->cur_depth, td->cur_depth, NULL);
-		if (r > 0) {
-			icd.nr = r;
-			ios_completed(td, &icd);
-		}
-	}
+	if (td->cur_depth)
+		r = io_u_queued_complete(td, td->cur_depth);
 }
 
 /*
@@ -206,7 +197,6 @@ static void cleanup_pending_aio(struct thread_data *td)
 static int fio_io_sync(struct thread_data *td, struct fio_file *f)
 {
 	struct io_u *io_u = __get_io_u(td);
-	struct io_completion_data icd;
 	int ret;
 
 	if (!io_u)
@@ -220,24 +210,27 @@ static int fio_io_sync(struct thread_data *td, struct fio_file *f)
 		return 1;
 	}
 
+requeue:
 	ret = td_io_queue(td, io_u);
-	if (ret) {
-		td_verror(td, io_u->error);
-		put_io_u(td, io_u);
-		return 1;
-	}
-
-	ret = td_io_getevents(td, 1, td->cur_depth, NULL);
 	if (ret < 0) {
-		td_verror(td, ret);
+		td_verror(td, io_u->error, "td_io_queue");
+		put_io_u(td, io_u);
 		return 1;
-	}
+	} else if (ret == FIO_Q_QUEUED) {
+		if (io_u_queued_complete(td, 1) < 0)
+			return 1;
+	} else if (ret == FIO_Q_COMPLETED) {
+		if (io_u->error) {
+			td_verror(td, io_u->error, "td_io_queue");
+			return 1;
+		}
 
-	icd.nr = ret;
-	ios_completed(td, &icd);
-	if (icd.error) {
-		td_verror(td, icd.error);
-		return 1;
+		if (io_u_sync_complete(td, io_u) < 0)
+			return 1;
+	} else if (ret == FIO_Q_BUSY) {
+		if (td_io_commit(td))
+			return 1;
+		goto requeue;
 	}
 
 	return 0;
@@ -249,26 +242,28 @@ static int fio_io_sync(struct thread_data *td, struct fio_file *f)
  */
 static void do_verify(struct thread_data *td)
 {
-	struct io_u *io_u, *v_io_u = NULL;
-	struct io_completion_data icd;
 	struct fio_file *f;
-	int ret, i;
+	struct io_u *io_u;
+	int ret, i, min_events;
 
 	/*
 	 * sync io first and invalidate cache, to make sure we really
 	 * read from disk.
 	 */
 	for_each_file(td, f, i) {
-		fio_io_sync(td, f);
-		file_invalidate_cache(td, f);
+		if (fio_io_sync(td, f))
+			break;
+		if (file_invalidate_cache(td, f))
+			break;
 	}
 
-	td_set_runstate(td, TD_VERIFYING);
+	if (td->error)
+		return;
 
-	do {
-		if (td->terminate)
-			break;
+	td_set_runstate(td, TD_VERIFYING);
 
+	io_u = NULL;
+	while (!td->terminate) {
 		io_u = __get_io_u(td);
 		if (!io_u)
 			break;
@@ -283,60 +278,64 @@ static void do_verify(struct thread_data *td)
 			break;
 		}
 
-		f = get_next_file(td);
-		if (!f)
-			break;
-
-		io_u->file = f;
-
 		if (td_io_prep(td, io_u)) {
 			put_io_u(td, io_u);
 			break;
 		}
 
+		io_u->end_io = verify_io_u;
+requeue:
 		ret = td_io_queue(td, io_u);
-		if (ret) {
-			td_verror(td, io_u->error);
-			put_io_u(td, io_u);
-			break;
-		}
 
-		/*
-		 * we have one pending to verify, do that while
-		 * we are doing io on the next one
-		 */
-		if (do_io_u_verify(td, &v_io_u))
-			break;
+		switch (ret) {
+		case FIO_Q_COMPLETED:
+			if (io_u->error)
+				ret = -io_u->error;
+			if (io_u->xfer_buflen != io_u->resid && io_u->resid) {
+				int bytes = io_u->xfer_buflen - io_u->resid;
 
-		ret = td_io_getevents(td, 1, 1, NULL);
-		if (ret != 1) {
+				io_u->xfer_buflen = io_u->resid;
+				io_u->xfer_buf += bytes;
+				goto requeue;
+			}
+			ret = io_u_sync_complete(td, io_u);
 			if (ret < 0)
-				td_verror(td, ret);
+				break;
+			continue;
+		case FIO_Q_QUEUED:
+			break;
+		case FIO_Q_BUSY:
+			requeue_io_u(td, &io_u);
+			ret = td_io_commit(td);
+			break;
+		default:
+			assert(ret < 0);
+			td_verror(td, -ret, "td_io_queue");
 			break;
 		}
 
-		v_io_u = td->io_ops->event(td, 0);
-		icd.nr = 1;
-		icd.error = 0;
-		fio_gettime(&icd.time, NULL);
-		io_completed(td, v_io_u, &icd);
-
-		if (icd.error) {
-			td_verror(td, icd.error);
-			put_io_u(td, v_io_u);
-			v_io_u = NULL;
+		if (ret < 0 || td->error)
 			break;
-		}
 
 		/*
-		 * if we can't submit more io, we need to verify now
+		 * if we can queue more, do so. but check if there are
+		 * completed io_u's first.
 		 */
-		if (queue_full(td) && do_io_u_verify(td, &v_io_u))
-			break;
+		min_events = 0;
+		if (queue_full(td) || ret == FIO_Q_BUSY) {
+			min_events = 1;
 
-	} while (1);
+			if (td->cur_depth > td->iodepth_low)
+				min_events = td->cur_depth - td->iodepth_low;
+		}
 
-	do_io_u_verify(td, &v_io_u);
+		/*
+		 * Reap required number of io units, if any, and do the
+		 * verification on them through the callback handler
+		 */
+		if (io_u_queued_complete(td, min_events) < 0)
+			break;
+	}
 
 	if (td->cur_depth)
 		cleanup_pending_aio(td);
@@ -375,103 +374,131 @@ static void do_cpuio(struct thread_data *td)
  */
 static void do_io(struct thread_data *td)
 {
-	struct io_completion_data icd;
 	struct timeval s;
 	unsigned long usec;
-	struct fio_file *f;
 	int i, ret = 0;
 
 	td_set_runstate(td, TD_RUNNING);
 
 	while ((td->this_io_bytes[0] + td->this_io_bytes[1]) < td->io_size) {
-		struct timespec *timeout;
+		struct timeval comp_time;
+		long bytes_done = 0;
 		int min_evts = 0;
 		struct io_u *io_u;
 
 		if (td->terminate)
 			break;
 
-		f = get_next_file(td);
-		if (!f)
-			break;
-
-		io_u = get_io_u(td, f);
+		io_u = get_io_u(td);
 		if (!io_u)
 			break;
 
 		memcpy(&s, &io_u->start_time, sizeof(s));
+
+		if (runtime_exceeded(td, &s)) {
+			put_io_u(td, io_u);
+			break;
+		}
 requeue:
 		ret = td_io_queue(td, io_u);
-		if (ret) {
-			if (ret > 0 && (io_u->xfer_buflen != io_u->resid) &&
-			    io_u->resid) {
-				/*
-				 * short read/write. requeue.
-				 */
+
+		switch (ret) {
+		case FIO_Q_COMPLETED:
+			if (io_u->error) {
+				ret = io_u->error;
+				break;
+			}
+			if (io_u->xfer_buflen != io_u->resid && io_u->resid) {
+				int bytes = io_u->xfer_buflen - io_u->resid;
+
 				io_u->xfer_buflen = io_u->resid;
-				io_u->xfer_buf += ret;
+				io_u->xfer_buf += bytes;
 				goto requeue;
-			} else {
-				put_io_u(td, io_u);
-				break;
 			}
+			fio_gettime(&comp_time, NULL);
+			bytes_done = io_u_sync_complete(td, io_u);
+			if (bytes_done < 0)
+				ret = bytes_done;
+			break;
+		case FIO_Q_QUEUED:
+			/*
+			 * if the engine doesn't have a commit hook,
+			 * the io_u is really queued. if it does have such
+			 * a hook, it has to call io_u_queued() itself.
+			 */
+			if (td->io_ops->commit == NULL)
+				io_u_queued(td, io_u);
+			break;
+		case FIO_Q_BUSY:
+			requeue_io_u(td, &io_u);
+			ret = td_io_commit(td);
+			break;
+		default:
+			assert(ret < 0);
+			put_io_u(td, io_u);
+			break;
 		}
 
-		add_slat_sample(td, io_u->ddir, mtime_since(&io_u->start_time, &io_u->issue_time));
-
-		if (td->cur_depth < td->iodepth) {
-			struct timespec ts = { .tv_sec = 0, .tv_nsec = 0};
+		if (ret < 0 || td->error)
+			break;
 
-			timeout = &ts;
+		/*
+		 * See if we need to complete some commands
+		 */
+		if (ret == FIO_Q_QUEUED || ret == FIO_Q_BUSY) {
 			min_evts = 0;
-		} else {
-			timeout = NULL;
-			min_evts = 1;
-		}
+			if (queue_full(td) || ret == FIO_Q_BUSY) {
+				min_evts = 1;
 
-		ret = td_io_getevents(td, min_evts, td->cur_depth, timeout);
-		if (ret < 0) {
-			td_verror(td, ret);
-			break;
-		} else if (!ret)
-			continue;
+				if (td->cur_depth > td->iodepth_low)
+					min_evts = td->cur_depth - td->iodepth_low;
+			}
 
-		icd.nr = ret;
-		ios_completed(td, &icd);
-		if (icd.error) {
-			td_verror(td, icd.error);
-			break;
+			fio_gettime(&comp_time, NULL);
+			bytes_done = io_u_queued_complete(td, min_evts);
+			if (bytes_done < 0)
+				break;
 		}
 
+		if (!bytes_done)
+			continue;
+
 		/*
 		 * the rate is batched for now, it should work for batches
 		 * of completions except the very first one which may look
 		 * a little bursty
 		 */
-		usec = utime_since(&s, &icd.time);
+		usec = utime_since(&s, &comp_time);
 
-		rate_throttle(td, usec, icd.bytes_done[td->ddir], td->ddir);
+		rate_throttle(td, usec, bytes_done);
 
-		if (check_min_rate(td, &icd.time)) {
+		if (check_min_rate(td, &comp_time)) {
 			if (exitall_on_terminate)
 				terminate_threads(td->groupid, 0);
-			td_verror(td, ENODATA);
+			td_verror(td, ENODATA, "check_min_rate");
 			break;
 		}
 
-		if (runtime_exceeded(td, &icd.time))
-			break;
-
 		if (td->thinktime) {
 			unsigned long long b;
 
 			b = td->io_blocks[0] + td->io_blocks[1];
-			if (!(b % td->thinktime_blocks))
-				usec_sleep(td, td->thinktime);
+			if (!(b % td->thinktime_blocks)) {
+				int left;
+
+				if (td->thinktime_spin)
+					__usec_sleep(td->thinktime_spin);
+
+				left = td->thinktime - td->thinktime_spin;
+				if (left)
+					usec_sleep(td, left);
+			}
 		}
 	}
 
 	if (!td->error) {
+		struct fio_file *f;
+
 		if (td->cur_depth)
 			cleanup_pending_aio(td);
 
@@ -548,9 +575,12 @@ static int init_io_u(struct thread_data *td)
 			fill_rand_buf(io_u, max_bs);
 
 		io_u->index = i;
+		io_u->flags = IO_U_F_FREE;
 		list_add(&io_u->list, &td->io_u_freelist);
 	}
 
+	io_u_init_timeout();
+
 	return 0;
 }
 
@@ -567,7 +597,7 @@ static int switch_ioscheduler(struct thread_data *td)
 
 	f = fopen(tmp, "r+");
 	if (!f) {
-		td_verror(td, errno);
+		td_verror(td, errno, "fopen");
 		return 1;
 	}
 
@@ -576,7 +606,7 @@ static int switch_ioscheduler(struct thread_data *td)
 	 */
 	ret = fwrite(td->ioscheduler, strlen(td->ioscheduler), 1, f);
 	if (ferror(f) || ret != 1) {
-		td_verror(td, errno);
+		td_verror(td, errno, "fwrite");
 		fclose(f);
 		return 1;
 	}
@@ -588,7 +618,7 @@ static int switch_ioscheduler(struct thread_data *td)
 	 */
 	ret = fread(tmp, 1, sizeof(tmp), f);
 	if (ferror(f) || ret < 0) {
-		td_verror(td, errno);
+		td_verror(td, errno, "fread");
 		fclose(f);
 		return 1;
 	}
@@ -596,7 +626,7 @@ static int switch_ioscheduler(struct thread_data *td)
 	sprintf(tmp2, "[%s]", td->ioscheduler);
 	if (!strstr(tmp, tmp2)) {
 		log_err("fio: io scheduler %s not found\n", td->ioscheduler);
-		td_verror(td, EINVAL);
+		td_verror(td, EINVAL, "iosched_switch");
 		fclose(f);
 		return 1;
 	}
@@ -610,11 +640,15 @@ static void clear_io_state(struct thread_data *td)
 	struct fio_file *f;
 	int i;
 
-	td->stat_io_bytes[0] = td->stat_io_bytes[1] = 0;
+	td->ts.stat_io_bytes[0] = td->ts.stat_io_bytes[1] = 0;
 	td->this_io_bytes[0] = td->this_io_bytes[1] = 0;
 	td->zone_bytes = 0;
 
+	td->last_was_sync = 0;
+
 	for_each_file(td, f, i) {
+		f->last_completed_pos = 0;
+
 		f->last_pos = 0;
 		if (td->io_ops->flags & FIO_SYNCIO)
 			lseek(f->fd, SEEK_SET, 0);
@@ -640,6 +674,7 @@ static void *thread_main(void *data)
 
 	INIT_LIST_HEAD(&td->io_u_freelist);
 	INIT_LIST_HEAD(&td->io_u_busylist);
+	INIT_LIST_HEAD(&td->io_u_requeues);
 	INIT_LIST_HEAD(&td->io_hist_list);
 	INIT_LIST_HEAD(&td->io_log_list);
 
@@ -647,7 +682,7 @@ static void *thread_main(void *data)
 		goto err;
 
 	if (fio_setaffinity(td) == -1) {
-		td_verror(td, errno);
+		td_verror(td, errno, "cpu_set_affinity");
 		goto err;
 	}
 
@@ -656,13 +691,13 @@ static void *thread_main(void *data)
 
 	if (td->ioprio) {
 		if (ioprio_set(IOPRIO_WHO_PROCESS, 0, td->ioprio) == -1) {
-			td_verror(td, errno);
+			td_verror(td, errno, "ioprio_set");
 			goto err;
 		}
 	}
 
 	if (nice(td->nice) == -1) {
-		td_verror(td, errno);
+		td_verror(td, errno, "nice");
 		goto err;
 	}
 
@@ -694,15 +729,16 @@ static void *thread_main(void *data)
 	}
 
 	fio_gettime(&td->epoch, NULL);
-	getrusage(RUSAGE_SELF, &td->ru_start);
+	memcpy(&td->timeout_end, &td->epoch, sizeof(td->epoch));
+	getrusage(RUSAGE_SELF, &td->ts.ru_start);
 
 	runtime[0] = runtime[1] = 0;
 	while (td->loops--) {
 		fio_gettime(&td->start, NULL);
-		memcpy(&td->stat_sample_time, &td->start, sizeof(td->start));
+		memcpy(&td->ts.stat_sample_time, &td->start, sizeof(td->start));
 
 		if (td->ratemin)
-			memcpy(&td->lastrate, &td->stat_sample_time, sizeof(td->lastrate));
+			memcpy(&td->lastrate, &td->ts.stat_sample_time, sizeof(td->lastrate));
 
 		clear_io_state(td);
 		prune_io_piece_log(td);
@@ -712,10 +748,11 @@ static void *thread_main(void *data)
 		else
 			do_io(td);
 
-		runtime[td->ddir] += utime_since_now(&td->start);
-		if (td_rw(td) && td->io_bytes[td->ddir ^ 1])
-			runtime[td->ddir ^ 1] = runtime[td->ddir];
-
+		if (td_read(td) && td->io_bytes[DDIR_READ])
+			runtime[DDIR_READ] += utime_since_now(&td->start);
+		if (td_write(td) && td->io_bytes[DDIR_WRITE])
+			runtime[DDIR_WRITE] += utime_since_now(&td->start);
+		
 		if (td->error || td->terminate)
 			break;
 
@@ -738,12 +775,12 @@ static void *thread_main(void *data)
 	td->runtime[0] = runtime[0] / 1000;
 	td->runtime[1] = runtime[1] / 1000;
 
-	if (td->bw_log)
-		finish_log(td, td->bw_log, "bw");
-	if (td->slat_log)
-		finish_log(td, td->slat_log, "slat");
-	if (td->clat_log)
-		finish_log(td, td->clat_log, "clat");
+	if (td->ts.bw_log)
+		finish_log(td, td->ts.bw_log, "bw");
+	if (td->ts.slat_log)
+		finish_log(td, td->ts.slat_log, "slat");
+	if (td->ts.clat_log)
+		finish_log(td, td->ts.clat_log, "clat");
 	if (td->write_iolog_file)
 		write_iolog_close(td);
 	if (td->exec_postrun) {
@@ -761,7 +798,7 @@ err:
 	close_ioengine(td);
 	cleanup_io_u(td);
 	td_set_runstate(td, TD_EXITED);
-	return (void *) td->error;
+	return (void *) (unsigned long) td->error;
 }
 
 /*
@@ -784,7 +821,7 @@ static int fork_main(int shmid, int offset)
 	td = data + offset * sizeof(struct thread_data);
 	ret = thread_main(td);
 	shmdt(data);
-	return (int) ret;
+	return (int) (unsigned long) ret;
 }
 
 /*
@@ -800,6 +837,8 @@ static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
 	 */
 	pending = cputhreads = 0;
 	for_each_td(td, i) {
+		int flags = 0;
+
 		/*
 		 * ->io_ops is NULL for a thread that has closed its
 		 * io engine
@@ -807,55 +846,66 @@ static void reap_threads(int *nr_running, int *t_rate, int *m_rate)
 		if (td->io_ops && td->io_ops->flags & FIO_CPUIO)
 			cputhreads++;
 
-		if (td->runstate < TD_EXITED) {
-			/*
-			 * check if someone quit or got killed in an unusual way
-			 */
-			ret = waitpid(td->pid, &status, WNOHANG);
-			if (ret < 0)
-				perror("waitpid");
-			else if ((ret == td->pid) && WIFSIGNALED(status)) {
-				int sig = WTERMSIG(status);
-
-				log_err("fio: pid=%d, got signal=%d\n", td->pid, sig);
+		if (!td->pid || td->runstate == TD_REAPED)
+			continue;
+		if (td->use_thread) {
+			if (td->runstate == TD_EXITED) {
 				td_set_runstate(td, TD_REAPED);
 				goto reaped;
 			}
+			continue;
 		}
 
-		if (td->runstate != TD_EXITED) {
-			if (td->runstate < TD_RUNNING)
-				pending++;
+		flags = WNOHANG;
+		if (td->runstate == TD_EXITED)
+			flags = 0;
 
-			continue;
-		}
+		/*
+		 * check if someone quit or got killed in an unusual way
+		 */
+		ret = waitpid(td->pid, &status, flags);
+		if (ret < 0) {
+			if (errno == ECHILD) {
+				log_err("fio: pid=%d disappeared %d\n", td->pid, td->runstate);
+				td_set_runstate(td, TD_REAPED);
+				goto reaped;
+			}
+			perror("waitpid");
+		} else if (ret == td->pid) {
+			if (WIFSIGNALED(status)) {
+				int sig = WTERMSIG(status);
 
-		if (td->error)
-			exit_value++;
+				log_err("fio: pid=%d, got signal=%d\n", td->pid, sig);
+				td_set_runstate(td, TD_REAPED);
+				goto reaped;
+			}
+			if (WIFEXITED(status)) {
+				if (WEXITSTATUS(status) && !td->error)
+					td->error = WEXITSTATUS(status);
 
-		td_set_runstate(td, TD_REAPED);
+				td_set_runstate(td, TD_REAPED);
+				goto reaped;
+			}
+		}
 
+		/*
+		 * thread is not dead, continue
+		 */
+		continue;
+reaped:
 		if (td->use_thread) {
 			long ret;
 
 			if (pthread_join(td->thread, (void *) &ret))
-				perror("thread_join");
-		} else {
-			int status;
-
-			ret = waitpid(td->pid, &status, 0);
-			if (ret < 0)
-				perror("waitpid");
-			else if (WIFEXITED(status) && WEXITSTATUS(status)) {
-				if (!exit_value)
-					exit_value++;
-			}
+				perror("pthread_join");
 		}
 
-reaped:
 		(*nr_running)--;
 		(*m_rate) -= td->ratemin;
 		(*t_rate) -= td->rate;
+
+		if (td->error)
+			exit_value++;
 	}
 
 	if (*nr_running == cputhreads && !pending)
@@ -911,6 +961,8 @@ static void run_threads(void)
 		init_disk_util(td);
 	}
 
+	set_genesis_time();
+
 	while (todo) {
 		struct thread_data *map[MAX_JOBS];
 		struct timeval this_start;
@@ -1069,6 +1121,8 @@ int main(int argc, char *argv[])
 		setup_log(&agg_io_log[DDIR_WRITE]);
 	}
 
+	set_genesis_time();
+
 	disk_util_timer_arm();
 
 	run_threads();