From: Nitin Saxena <nsaxena@marvell.com>
Date: Wed, 24 Jul 2019 11:49:06 +0000 (+0530)
Subject: dpdk: Prefetch correct size of rte_mbuf
X-Git-Tag: v20.01-rc0~113
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=1e5ca9b918dfe988eb0247ec35fc188bfabb4dcb;hp=7f37a94bab6d4fac88454105e3a281d57487dbf6;p=vpp.git

dpdk: Prefetch correct size of rte_mbuf

sizeof(rte_mbuf) is 128 byte but 2* CLIB_CACHE_LINE_BYTES
is 256 byte for ThunderX/OCTEONTx targets.

Type: fix

Change-Id: If6893b168cf1c55c44bf4669a888ce858f2ef487
Signed-off-by: Nitin Saxena <nsaxena@marvell.com>
---

diff --git a/src/plugins/dpdk/device/device.c b/src/plugins/dpdk/device/device.c
index 270abe19190..8778d71cd7a 100644
--- a/src/plugins/dpdk/device/device.c
+++ b/src/plugins/dpdk/device/device.c
@@ -214,7 +214,7 @@ static_always_inline void
 dpdk_prefetch_buffer (vlib_main_t * vm, struct rte_mbuf *mb)
 {
   vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
-  CLIB_PREFETCH (mb, 2 * CLIB_CACHE_LINE_BYTES, STORE);
+  CLIB_PREFETCH (mb, sizeof (struct rte_mbuf), STORE);
   CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
 }