From: Ashwin Sekhar T K <ashwin.sekhar@caviumnetworks.com>
Date: Fri, 12 May 2017 05:45:42 +0000 (-0700)
Subject: eal: pause while busy-waiting for lcore slave
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=8d55ebcc78d82fd4ec72e4fa47fea62a9f2fe685;p=dpdk.git

eal: pause while busy-waiting for lcore slave

Instead of simply busy-waiting for slave in rte_eal_wait_lcore()
do rte_pause(). This will give power savings.

This also fixes warning -Wempty-body seen with armv8a clang
compilation.

Suggested-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Signed-off-by: Ashwin Sekhar T K <ashwin.sekhar@caviumnetworks.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
---

diff --git a/lib/librte_eal/common/eal_common_launch.c b/lib/librte_eal/common/eal_common_launch.c
index 229c3a0344..1848466062 100644
--- a/lib/librte_eal/common/eal_common_launch.c
+++ b/lib/librte_eal/common/eal_common_launch.c
@@ -54,7 +54,8 @@ rte_eal_wait_lcore(unsigned slave_id)
 		return 0;
 
 	while (lcore_config[slave_id].state != WAIT &&
-	       lcore_config[slave_id].state != FINISHED);
+	       lcore_config[slave_id].state != FINISHED)
+		rte_pause();
 
 	rte_rmb();