From: Yongseok Koh <yskoh@mellanox.com>
Date: Mon, 14 Jan 2019 10:00:22 +0000 (-0800)
Subject: app/testpmd: fix missing prefetch in macswap mode
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=66fc1704a7ca3232d9e452cc486381e2bbe940b3;p=dpdk.git

app/testpmd: fix missing prefetch in macswap mode

Prefetching packet was missing when do_macswap() was optimized.

Fixes: 62b52877adbe ("app/testpmd: batch MAC swap for performance on x86")

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>
---

diff --git a/app/test-pmd/macswap_sse.h b/app/test-pmd/macswap_sse.h
index 662fe79cf9..2b6e7324da 100644
--- a/app/test-pmd/macswap_sse.h
+++ b/app/test-pmd/macswap_sse.h
@@ -35,6 +35,13 @@ do_macswap(struct rte_mbuf *pkts[], uint16_t nb,
 	r = nb;
 
 	while (r >= 4) {
+		if (r >= 8) {
+			rte_prefetch0(rte_pktmbuf_mtod(pkts[i + 4], void *));
+			rte_prefetch0(rte_pktmbuf_mtod(pkts[i + 5], void *));
+			rte_prefetch0(rte_pktmbuf_mtod(pkts[i + 6], void *));
+			rte_prefetch0(rte_pktmbuf_mtod(pkts[i + 7], void *));
+		}
+
 		mb[0] = pkts[i++];
 		eth_hdr[0] = rte_pktmbuf_mtod(mb[0], struct ether_hdr *);
 		addr0 = _mm_loadu_si128((__m128i *)eth_hdr[0]);