X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=rate-submit.c;h=8ecd285c7d91eba927e762e9ab6e5f422c01836f;hp=2f02fe2ba8365dea762051e555b1f28651ee45e3;hb=c06379a65d467bdcc782d7e1aa067e6391cd5a68;hpb=f88817479014b87bfed3a20f9fe7dae0efb33dee

diff --git a/rate-submit.c b/rate-submit.c
index 2f02fe2b..8ecd285c 100644
--- a/rate-submit.c
+++ b/rate-submit.c
@@ -9,6 +9,36 @@
 #include "lib/getrusage.h"
 #include "rate-submit.h"
 
+static void check_overlap(struct io_u *io_u)
+{
+	int i;
+	struct thread_data *td;
+	bool overlap = false;
+
+	do {
+		/*
+		 * Allow only one thread to check for overlap at a
+		 * time to prevent two threads from thinking the coast
+		 * is clear and then submitting IOs that overlap with
+		 * each other
+		 */
+		pthread_mutex_lock(&overlap_check);
+		for_each_td(td, i) {
+			if (td->runstate <= TD_SETTING_UP ||
+				td->runstate >= TD_FINISHING ||
+				!td->o.serialize_overlap ||
+				td->o.io_submit_mode != IO_MODE_OFFLOAD)
+				continue;
+
+			overlap = in_flight_overlap(&td->io_u_all, io_u);
+			if (overlap) {
+				pthread_mutex_unlock(&overlap_check);
+				break;
+			}
+		}
+	} while (overlap);
+}
+
 static int io_workqueue_fn(struct submit_worker *sw,
 			   struct workqueue_work *work)
 {
@@ -17,6 +47,9 @@ static int io_workqueue_fn(struct submit_worker *sw,
 	struct thread_data *td = sw->priv;
 	int ret;
 
+	if (td->o.serialize_overlap)
+		check_overlap(io_u);
+
 	dprint(FD_RATE, "io_u %p queued by %u\n", io_u, gettid());
 
 	io_u_set(td, io_u, IO_U_F_NO_FILE_PUT);