migration: Calculate mbps only during transfer time

We used to include in this calculation the setup time, but that can be
quite big in rdma or multifd.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>

migration/migration.c

@@ -2708,6 +2708,7 @@ static void migration_calculate_complete(MigrationState *s)
 {
     uint64_t bytes = qemu_ftell(s->to_dst_file);
     int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
+    int64_t transfer_time;
 
     s->total_time = end_time - s->start_time;
     if (!s->downtime) {
@@ -2718,8 +2719,9 @@ static void migration_calculate_complete(MigrationState *s)
         s->downtime = end_time - s->downtime_start;
     }
 
-    if (s->total_time) {
-        s->mbps = ((double) bytes * 8.0) / s->total_time / 1000;
+    transfer_time = s->total_time - s->setup_time;
+    if (transfer_time) {
+        s->mbps = ((double) bytes * 8.0) / transfer_time / 1000;
     }
 }