From: Balazs Nemeth Date: Fri, 26 Mar 2021 11:01:29 +0000 (+0100) Subject: net/qede: prefetch next packet to free X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=5984000d1b6f133a9cf10333c0e6603b0b9e9c61;p=dpdk.git net/qede: prefetch next packet to free 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 Reviewed-by: Igor Russkikh --- diff --git a/drivers/net/qede/qede_rxtx.c b/drivers/net/qede/qede_rxtx.c index 4f58abfbf2..ed36171607 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) {