[dpdk-dev] [PATCH 2/5] net/i40e: remove limit of i40e_xmit_pkts_vec burst size
Zhiyong Yang
zhiyong.yang at intel.com
Fri Feb 24 09:48:18 CET 2017
To add a wrapper function i40e_xmit_pkts_vec_simple to remove the
limit of tx burst size. The patch makes i40e vec function an best
effort to transmit the pkts in the consistent behavior like
i40e_xmit_pkts_simple and i40e_xmit_pkts do that.
Cc: Helin Zhang <helin.zhang at intel.com>
Cc: Jingjing Wu <jingjing.wu at intel.com>
Signed-off-by: Zhiyong Yang <zhiyong.yang at intel.com>
---
drivers/net/i40e/i40e_rxtx.c | 27 ++++++++++++++++++++++++++-
1 file changed, 26 insertions(+), 1 deletion(-)
diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index 48429cc..819d1d4 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -1426,6 +1426,31 @@ i40e_xmit_pkts_simple(void *tx_queue,
return nb_tx;
}
+static uint16_t
+i40e_xmit_pkts_vec_simple(void *tx_queue, struct rte_mbuf **tx_pkts,
+ uint16_t nb_pkts)
+{
+ uint16_t nb_tx = 0;
+ struct i40e_tx_queue *txq = (struct i40e_tx_queue *)tx_queue;
+
+ if (likely(nb_pkts <= txq->tx_rs_thresh))
+ return i40e_xmit_pkts_vec(tx_queue, tx_pkts, nb_pkts);
+
+ /* transmit in chunks of at least txq->tx_rs_thresh */
+ while (nb_pkts) {
+ uint16_t ret, num;
+
+ num = (uint16_t)RTE_MIN(nb_pkts, txq->tx_rs_thresh);
+ ret = i40e_xmit_pkts_vec(tx_queue, &tx_pkts[nb_tx], num);
+ nb_tx += ret;
+ nb_pkts -= ret;
+ if (ret < num)
+ break;
+ }
+
+ return nb_tx;
+}
+
/*********************************************************************
*
* TX prep functions
@@ -2840,7 +2865,7 @@ i40e_set_tx_function(struct rte_eth_dev *dev)
if (ad->tx_simple_allowed) {
if (ad->tx_vec_allowed) {
PMD_INIT_LOG(DEBUG, "Vector tx finally be used.");
- dev->tx_pkt_burst = i40e_xmit_pkts_vec;
+ dev->tx_pkt_burst = i40e_xmit_pkts_vec_simple;
} else {
PMD_INIT_LOG(DEBUG, "Simple tx finally be used.");
dev->tx_pkt_burst = i40e_xmit_pkts_simple;
--
2.7.4
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