Prefetch mbuf headers, resulting in ~10% throughput improvement when
the Ethernet RX and TX Adapters are hosted on the same core (likely
~2x in case a dedicated TX core is used).
Signed-off-by: Mattias Rönnblom <mattias.ronnb...@ericsson.com>
Tested-by: Peter Nilsson <peter.j.nils...@ericsson.com>
---
lib/eventdev/rte_event_eth_tx_adapter.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/lib/eventdev/rte_event_eth_tx_adapter.c
b/lib/eventdev/rte_event_eth_tx_adapter.c
index 67fff8b7d6..d740ae00f9 100644
--- a/lib/eventdev/rte_event_eth_tx_adapter.c
+++ b/lib/eventdev/rte_event_eth_tx_adapter.c
@@ -598,6 +598,12 @@ txa_process_event_vector(struct txa_service_data *txa,
return nb_tx;
}
+static inline void
+txa_prefetch_mbuf(struct rte_mbuf *mbuf)
+{
+ rte_mbuf_prefetch_part1(mbuf);
+}
+
static void
txa_service_tx(struct txa_service_data *txa, struct rte_event *ev,
uint32_t n)
@@ -608,6 +614,20 @@ txa_service_tx(struct txa_service_data *txa, struct
rte_event *ev,
stats = &txa->stats;
+ for (i = 0; i < n; i++) {
+ struct rte_event *event = &ev[i];
+
+ if (unlikely(event->event_type & RTE_EVENT_TYPE_VECTOR)) {
+ struct rte_event_vector *vec = event->vec;
+ struct rte_mbuf **mbufs = vec->mbufs;
+ uint32_t k;
+
+ for (k = 0; k < vec->nb_elem; k++)
+ txa_prefetch_mbuf(mbufs[k]);
+ } else
+ txa_prefetch_mbuf(event->mbuf);
+ }
+
nb_tx = 0;
for (i = 0; i < n; i++) {
uint16_t port;
--
2.43.0
