From: Damjan Marion <damarion@cisco.com>
Date: Tue, 11 Jul 2017 15:13:37 +0000 (+0200)
Subject: dpdk: prefetch 2nd cacheline of rte_mbuf during tx
X-Git-Tag: v17.10-rc1~353
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=refs%2Fchanges%2F22%2F7522%2F2;p=vpp.git

dpdk: prefetch 2nd cacheline of rte_mbuf during tx

Change-Id: I0db02dd0147dbd47d4296fdb84280d0e7d321f3c
Signed-off-by: Damjan Marion <damarion@cisco.com>
---

diff --git a/src/plugins/dpdk/device/device.c b/src/plugins/dpdk/device/device.c
index c68ecbda246..8801bfd3a25 100644
--- a/src/plugins/dpdk/device/device.c
+++ b/src/plugins/dpdk/device/device.c
@@ -307,7 +307,7 @@ dpdk_prefetch_buffer_by_index (vlib_main_t * vm, u32 bi)
   struct rte_mbuf *mb;
   b = vlib_get_buffer (vm, bi);
   mb = rte_mbuf_from_vlib_buffer (b);
-  CLIB_PREFETCH (mb, CLIB_CACHE_LINE_BYTES, LOAD);
+  CLIB_PREFETCH (mb, 2 * CLIB_CACHE_LINE_BYTES, STORE);
   CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
 }