From: Li RongQing <lirongqing@baidu.com>
Date: Wed, 14 Apr 2021 05:39:12 +0000 (+0800)
Subject: xsk: Align XDP socket batch size with DPDK
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e7a1c1300891d8f11d05b42665e299cc22a4b383;p=linux.git

xsk: Align XDP socket batch size with DPDK

DPDK default burst size is 32, however, kernel xsk sendto
syscall can not handle all 32 at one time, and return with
error.

So make kernel XDP socket batch size larger to avoid
unnecessary syscall fail and context switch which will help
to increase performance.

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/1618378752-4191-1-git-send-email-lirongqing@baidu.com
---

diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index a71ed664da0ac..cd62d4ba87a98 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -30,7 +30,7 @@
 #include "xdp_umem.h"
 #include "xsk.h"
 
-#define TX_BATCH_SIZE 16
+#define TX_BATCH_SIZE 32
 
 static DEFINE_PER_CPU(struct list_head, xskmap_flush_list);