[PATCH] examples/ipsec-secgw: fix IPsec performance drop

[Rahul Bhansali <rbhansali@marvell.com>]

Single packet free using rte_pktmbuf_free_bulk() is dropping the
performance. On cn10k, maximum of ~4% drop observed for IPsec
event mode single SA outbound case.

To fix this issue, single packet free will use rte_pktmbuf_free
API.

Fixes: bd7c063561b3 ("examples/ipsec-secgw: use bulk free")

Signed-off-by: Rahul Bhansali <rbhansali@marvell.com>
---
 examples/ipsec-secgw/ipsec-secgw.h | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/examples/ipsec-secgw/ipsec-secgw.h b/examples/ipsec-secgw/ipsec-secgw.h
index 8baab44ee7..ec33a982df 100644
--- a/examples/ipsec-secgw/ipsec-secgw.h
+++ b/examples/ipsec-secgw/ipsec-secgw.h
@@ -229,11 +229,10 @@ free_reassembly_fail_pkt(struct rte_mbuf *mb)
 }
 
 /* helper routine to free bulk of packets */
-static inline void
-free_pkts(struct rte_mbuf *mb[], uint32_t n)
+static __rte_always_inline void
+free_pkts(struct rte_mbuf *mb[], const uint32_t n)
 {
-	rte_pktmbuf_free_bulk(mb, n);
-
+	n == 1 ? rte_pktmbuf_free(mb[0]) : rte_pktmbuf_free_bulk(mb, n);
 	core_stats_update_drop(n);
 }
 
-- 
2.25.1