[dpdk-dev] [PATCH] event/sw: add unlikely branch predict

[Laatz, Kevin]

On 27/02/2018 20:08, Vipin Varghese wrote:
> 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 at intel.com>
> ---
>   drivers/event/sw/sw_evdev_scheduler.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/event/sw/sw_evdev_scheduler.c b/drivers/event/sw/sw_evdev_scheduler.c
> index 3106eb3..17bd4c0 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 {

Acked-by: Kevin Laatz <kevin.laatz at intel.com>