[dpdk-dev] [PATCH v3 1/6] eal: pause while busy-waiting for slave

[Ashwin Sekhar T K]

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.

Signed-off-by: Ashwin Sekhar T K <ashwin.sek...@caviumnetworks.com>
Suggested-by: Jerin Jacob <jerin.ja...@caviumnetworks.com>
---
 lib/librte_eal/common/eal_common_launch.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eal/common/eal_common_launch.c 
b/lib/librte_eal/common/eal_common_launch.c
index 229c3a034..184846606 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();
 
-- 
2.12.2