While handling the current mbuf, pull the next mbuf into the cache. Note
that the last four mbufs pulled into the cache are not handled, but that
doesn't matter.
Signed-off-by: Balazs Nemeth <bnem...@redhat.com>
Reviewed-by: Igor Russkikh <irussk...@marvell.com>
---
drivers/net/qede/qede_rxtx.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/qede/qede_rxtx.c b/drivers/net/qede/qede_rxtx.c
index 4f58abfbf..ed3617160 100644
--- a/drivers/net/qede/qede_rxtx.c
+++ b/drivers/net/qede/qede_rxtx.c
@@ -917,6 +917,12 @@ qede_process_tx_compl(__rte_unused struct ecore_dev *edev,
nb_segs = mbuf->nb_segs;
remaining -= nb_segs;
+ /* Prefetch the next mbuf. Note that at least the last 4 mbufs
+ * that are prefetched will not be used in the current call.
+ */
+ rte_mbuf_prefetch_part1(txq->sw_tx_ring[(idx + 4) & mask]);
+ rte_mbuf_prefetch_part2(txq->sw_tx_ring[(idx + 4) & mask]);
+
PMD_TX_LOG(DEBUG, txq, "nb_segs to free %u\n", nb_segs);
while (nb_segs) {
--
2.30.2
