X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=backend.c;h=d3e9bf8160615b64ae714b47f4524403df272f44;hp=fe1599706fcdcb32b0990b1e840b3259448396ab;hb=0a93fb3e08bf8957b782b80b4d5487852f0c81ce;hpb=84e893fd54a0895b9eadd8b4c62243faf19c9305

diff --git a/backend.c b/backend.c
index fe159970..d3e9bf81 100644
--- a/backend.c
+++ b/backend.c
@@ -18,7 +18,7 @@
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  *
  */
 #include <unistd.h>
@@ -499,7 +499,6 @@ int io_queue_event(struct thread_data *td, struct io_u *io_u, int *ret,
 			if (ddir_rw(io_u->ddir))
 				td->ts.short_io_u[io_u->ddir]++;
 
-			f = io_u->file;
 			if (io_u->offset == f->real_file_size)
 				goto sync_done;
 
@@ -586,6 +585,50 @@ static int unlink_all_files(struct thread_data *td)
 	return ret;
 }
 
+/*
+ * Check if io_u will overlap an in-flight IO in the queue
+ */
+static bool in_flight_overlap(struct io_u_queue *q, struct io_u *io_u)
+{
+	bool overlap;
+	struct io_u *check_io_u;
+	unsigned long long x1, x2, y1, y2;
+	int i;
+
+	x1 = io_u->offset;
+	x2 = io_u->offset + io_u->buflen;
+	overlap = false;
+	io_u_qiter(q, check_io_u, i) {
+		if (check_io_u->flags & IO_U_F_FLIGHT) {
+			y1 = check_io_u->offset;
+			y2 = check_io_u->offset + check_io_u->buflen;
+
+			if (x1 < y2 && y1 < x2) {
+				overlap = true;
+				dprint(FD_IO, "in-flight overlap: %llu/%lu, %llu/%lu\n",
+						x1, io_u->buflen,
+						y1, check_io_u->buflen);
+				break;
+			}
+		}
+	}
+
+	return overlap;
+}
+
+static int io_u_submit(struct thread_data *td, struct io_u *io_u)
+{
+	/*
+	 * Check for overlap if the user asked us to, and we have
+	 * at least one IO in flight besides this one.
+	 */
+	if (td->o.serialize_overlap && td->cur_depth > 1 &&
+	    in_flight_overlap(&td->io_u_all, io_u))
+		return FIO_Q_BUSY;
+
+	return td_io_queue(td, io_u);
+}
+
 /*
  * The main verify engine. Runs over the writes we previously submitted,
  * reads the blocks back in, and checks the crc/md5 of the data.
@@ -716,7 +759,7 @@ static void do_verify(struct thread_data *td, uint64_t verify_bytes)
 		if (!td->o.disable_slat)
 			fio_gettime(&io_u->start_time, NULL);
 
-		ret = td_io_queue(td, io_u);
+		ret = io_u_submit(td, io_u);
 
 		if (io_queue_event(td, io_u, &ret, ddir, NULL, 1, NULL))
 			break;
@@ -983,7 +1026,7 @@ static void do_io(struct thread_data *td, uint64_t *bytes_done)
 				td->rate_next_io_time[ddir] = usec_for_io(td, ddir);
 
 		} else {
-			ret = td_io_queue(td, io_u);
+			ret = io_u_submit(td, io_u);
 
 			if (should_check_rate(td))
 				td->rate_next_io_time[ddir] = usec_for_io(td, ddir);
@@ -1347,6 +1390,8 @@ static bool keep_running(struct thread_data *td)
 
 	if (td->done)
 		return false;
+	if (td->terminate)
+		return false;
 	if (td->o.time_based)
 		return true;
 	if (td->o.loops) {
@@ -1459,7 +1504,7 @@ static void *thread_main(void *data)
 	struct sk_out *sk_out = fd->sk_out;
 	uint64_t bytes_done[DDIR_RWDIR_CNT];
 	int deadlock_loop_cnt;
-	int clear_state;
+	bool clear_state, did_some_io;
 	int ret;
 
 	sk_out_assign(sk_out);
@@ -1647,16 +1692,14 @@ static void *thread_main(void *data)
 	if (td_io_init(td))
 		goto err;
 
-	if (init_random_map(td))
+	if (!init_random_map(td))
 		goto err;
 
 	if (o->exec_prerun && exec_string(o, o->exec_prerun, (const char *)"prerun"))
 		goto err;
 
-	if (o->pre_read) {
-		if (pre_read_files(td) < 0)
-			goto err;
-	}
+	if (o->pre_read && !pre_read_files(td))
+		goto err;
 
 	fio_verify_init(td);
 
@@ -1680,7 +1723,8 @@ static void *thread_main(void *data)
 	}
 
 	memset(bytes_done, 0, sizeof(bytes_done));
-	clear_state = 0;
+	clear_state = false;
+	did_some_io = false;
 
 	while (keep_running(td)) {
 		uint64_t verify_bytes;
@@ -1719,7 +1763,7 @@ static void *thread_main(void *data)
 		if (td->runstate >= TD_EXITED)
 			break;
 
-		clear_state = 1;
+		clear_state = true;
 
 		/*
 		 * Make sure we've successfully updated the rusage stats
@@ -1758,6 +1802,9 @@ static void *thread_main(void *data)
 		    td_ioengine_flagged(td, FIO_UNIDIR))
 			continue;
 
+		if (ddir_rw_sum(bytes_done))
+			did_some_io = true;
+
 		clear_io_state(td, 0);
 
 		fio_gettime(&td->start, NULL);
@@ -1784,6 +1831,7 @@ static void *thread_main(void *data)
 	 * (Are we not missing other flags that can be ignored ?)
 	 */
 	if ((td->o.size || td->o.io_size) && !ddir_rw_sum(bytes_done) &&
+	    !did_some_io && !td->o.create_only &&
 	    !(td_ioengine_flagged(td, FIO_NOIO) ||
 	      td_ioengine_flagged(td, FIO_DISKLESSIO)))
 		log_err("%s: No I/O performed by %s, "
@@ -1879,11 +1927,7 @@ static void reap_threads(unsigned int *nr_running, uint64_t *t_rate,
 	for_each_td(td, i) {
 		int flags = 0;
 
-		/*
-		 * ->io_ops is NULL for a thread that has closed its
-		 * io engine
-		 */
-		if (td->io_ops && !strcmp(td->io_ops->name, "cpuio"))
+		 if (!strcmp(td->o.ioengine, "cpuio"))
 			cputhreads++;
 		else
 			realthreads++;
@@ -1998,7 +2042,10 @@ static bool __check_trigger_file(void)
 static bool trigger_timedout(void)
 {
 	if (trigger_timeout)
-		return time_since_genesis() >= trigger_timeout;
+		if (time_since_genesis() >= trigger_timeout) {
+			trigger_timeout = 0;
+			return true;
+		}
 
 	return false;
 }
@@ -2007,7 +2054,7 @@ void exec_trigger(const char *cmd)
 {
 	int ret;
 
-	if (!cmd)
+	if (!cmd || cmd[0] == '\0')
 		return;
 
 	ret = system(cmd);
@@ -2293,6 +2340,7 @@ reap:
 				fio_terminate_threads(TERMINATE_ALL);
 				fio_abort = 1;
 				nr_started--;
+				free(fd);
 				break;
 			}
 			dprint(FD_MUTEX, "done waiting on startup_mutex\n");