[dpdk-dev] [PATCH v2 13/15] net/ionic: send as many packets as possible

Andrew Boyer aboyer at pensando.io
Tue Feb 16 21:35:38 CET 2021


Rather than dropping the whole burst if some don't fit.
This improves performance.

Signed-off-by: Andrew Boyer <aboyer at pensando.io>
Signed-off-by: Vishwas Danivas <vishwas at pensando.io>
---
 drivers/net/ionic/ionic_rxtx.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ionic/ionic_rxtx.c b/drivers/net/ionic/ionic_rxtx.c
index bb67c497a1..b4bdeabad1 100644
--- a/drivers/net/ionic/ionic_rxtx.c
+++ b/drivers/net/ionic/ionic_rxtx.c
@@ -536,15 +536,16 @@ ionic_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 	struct ionic_tx_stats *stats = &txq->stats;
 	uint32_t next_q_head_idx;
 	uint32_t bytes_tx = 0;
-	uint16_t nb_tx = 0;
+	uint16_t nb_avail, nb_tx = 0;
 	int err;
 
 	/* Cleaning old buffers */
 	ionic_tx_flush(txq);
 
-	if (unlikely(ionic_q_space_avail(q) < nb_pkts)) {
-		stats->stop += nb_pkts;
-		return 0;
+	nb_avail = ionic_q_space_avail(q);
+	if (unlikely(nb_avail < nb_pkts)) {
+		stats->stop += nb_pkts - nb_avail;
+		nb_pkts = nb_avail;
 	}
 
 	while (nb_tx < nb_pkts) {
-- 
2.17.1



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