From: Vipin Varghese <vipin.varghese@intel.com>
Date: Tue, 27 Feb 2018 20:08:05 +0000 (+0530)
Subject: event/sw: add unlikely branch predict
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=63ddc002391359e5b2bb375b63939eb4e911a709;p=dpdk.git

event/sw: add unlikely branch predict

For most run cases 'sw->started' holds true. Adding a branch prediction
suggestion to compiler helps as this is first conditional check just
after entering the function.

Signed-off-by: Vipin Varghese <vipin.varghese@intel.com>
Acked-by: Kevin Laatz <kevin.laatz@intel.com>
---

diff --git a/drivers/event/sw/sw_evdev_scheduler.c b/drivers/event/sw/sw_evdev_scheduler.c
index 3106eb3376..17bd4c0a64 100644
--- a/drivers/event/sw/sw_evdev_scheduler.c
+++ b/drivers/event/sw/sw_evdev_scheduler.c
@@ -508,7 +508,7 @@ sw_event_schedule(struct rte_eventdev *dev)
 	uint32_t i;
 
 	sw->sched_called++;
-	if (!sw->started)
+	if (unlikely(!sw->started))
 		return;
 
 	do {