Re: [dpdk-stable] [EXT] [PATCH] event/dsw: immediately flush buffers on zero-sized enqueue

[Jerin Jacob Kollanukkaran <jerinj@marvell.com>]

> -----Original Message-----
> From: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
> Sent: Tuesday, December 17, 2019 4:44 PM
> To: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
> Cc: dev@dpdk.org; niclas.storm@ericsson.com; Mattias Rönnblom
> <mattias.ronnblom@ericsson.com>; stable@dpdk.org
> Subject: [EXT] [PATCH] event/dsw: immediately flush buffers on zero-sized
> enqueue
> Fix DSW's rte_event_enqueue_burst(), so that a call with a zero-sized event
> array immediately flushes the port's output buffers. Prior to this patch, the
> flush operation would be deferred to the next enqueue or dequeue call, which
> is inconsistent with DSW documentation.
> 
> Fixes: 1c8e3caa3bfb ("event/dsw: add event scheduling and device start/stop")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>

Applied to dpdk-next-eventdev/master. Thanks.


> ---
>  drivers/event/dsw/dsw_event.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/event/dsw/dsw_event.c b/drivers/event/dsw/dsw_event.c
> index 61a66fabf..1641c2d06 100644
> --- a/drivers/event/dsw/dsw_event.c
> +++ b/drivers/event/dsw/dsw_event.c
> @@ -1047,6 +1047,7 @@ dsw_event_enqueue_burst_generic(void *port,
> const struct rte_event events[],
>  	 */
>  	if (unlikely(events_len == 0)) {
>  		dsw_port_note_op(source_port,
> DSW_MAX_PORT_OPS_PER_BG_TASK);
> +		dsw_port_flush_out_buffers(dsw, port);
>  		return 0;
>  	}
> 
> --
> 2.17.1