From a39f5e14560df310e7af3c135a11bb6f51eb92e6 Mon Sep 17 00:00:00 2001
From: Rahul Bhansali <rbhansali@marvell.com>
Date: Wed, 25 May 2022 14:43:27 +0530
Subject: [PATCH] examples/l2fwd: check Rx packets count

An additional check is added to avoid extra processing if
receive packets are 0.

Performance impact: with Marvell OCTEON TX2 platform, observed an
improvement by ~14%.

Signed-off-by: Rahul Bhansali <rbhansali@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
---
 examples/l2fwd/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/examples/l2fwd/main.c b/examples/l2fwd/main.c
index a774722204..96fb33196f 100644
--- a/examples/l2fwd/main.c
+++ b/examples/l2fwd/main.c
@@ -283,6 +283,9 @@ l2fwd_main_loop(void)
 			nb_rx = rte_eth_rx_burst(portid, 0,
 						 pkts_burst, MAX_PKT_BURST);
 
+			if (unlikely(nb_rx == 0))
+				continue;
+
 			port_statistics[portid].rx += nb_rx;
 
 			for (j = 0; j < nb_rx; j++) {