fio: enable overlap checking with offload submission

[fio.git] / rate-submit.c

diff --git a/rate-submit.c b/rate-submit.c
index 2f02fe2ba8365dea762051e555b1f28651ee45e3..8ecd285c7d91eba927e762e9ab6e5f422c01836f 100644 (file)
--- 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);