From 66fc1704a7ca3232d9e452cc486381e2bbe940b3 Mon Sep 17 00:00:00 2001 From: Yongseok Koh Date: Mon, 14 Jan 2019 02:00:22 -0800 Subject: [PATCH] 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 Acked-by: Bernard Iremonger --- app/test-pmd/macswap_sse.h | 7 +++++++ 1 file changed, 7 insertions(+) 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]); -- 2.20.1