[RFC PATCH] eventdev: ensure 16-byte alignment for events

[Bruce Richardson <bruce.richardson@intel.com>]

The event structure in DPDK is 16-bytes in size, and events are
regularly passed as parameters directly rather than being passed as
pointers. To help compiler optimize correctly, we can explicitly request
16-byte alignment for events, which means that we should be able
to do aligned vector loads/stores (e.g. with SSE or Neon) when working
with those events.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 lib/eventdev/rte_eventdev.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/eventdev/rte_eventdev.h b/lib/eventdev/rte_eventdev.h
index 2ba8a7b090..bb0d59b059 100644
--- a/lib/eventdev/rte_eventdev.h
+++ b/lib/eventdev/rte_eventdev.h
@@ -1344,7 +1344,7 @@ struct rte_event {
 		struct rte_event_vector *vec;
 		/**< Event vector pointer. */
 	};
-};
+} __rte_aligned(16);
 
 /* Ethdev Rx adapter capability bitmap flags */
 #define RTE_EVENT_ETH_RX_ADAPTER_CAP_INTERNAL_PORT	0x1
-- 
2.39.2