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net/qede: prefetch next packet to free

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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 <bnemeth@redhat.com>
Reviewed-by: Igor Russkikh <irusskikh@marvell.com>
This commit is contained in:
Balazs Nemeth 2021-03-26 12:01:29 +01:00 committed by Jerin Jacob
parent 3f1f0bad15
commit 5984000d1b
1 changed files with 6 additions and 0 deletions
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6
drivers/net/qede/qede_rxtx.c
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@ -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) {