[dpdk-dev] [PATCH v6 6/7] net/thunderx: use new API to save cycles on aarch64

Gavin Hu gavin.hu at arm.com
Sat Sep 14 16:59:55 CEST 2019


Use the new API to wait in low power state instead of continuous
polling to save CPU cycles and power.

Signed-off-by: Gavin Hu <gavin.hu at arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
Acked-by: Jerin Jacob <jerinj at marvell.com>
---
 drivers/net/thunderx/nicvf_rxtx.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/thunderx/nicvf_rxtx.c b/drivers/net/thunderx/nicvf_rxtx.c
index 1c42874..16f34c6 100644
--- a/drivers/net/thunderx/nicvf_rxtx.c
+++ b/drivers/net/thunderx/nicvf_rxtx.c
@@ -385,8 +385,7 @@ nicvf_fill_rbdr(struct nicvf_rxq *rxq, int to_fill)
 		ltail++;
 	}
 
-	while (__atomic_load_n(&rbdr->tail, __ATOMIC_RELAXED) != next_tail)
-		rte_pause();
+	rte_wait_until_equal_relaxed_32(&rbdr->tail, next_tail);
 
 	__atomic_store_n(&rbdr->tail, ltail, __ATOMIC_RELEASE);
 	nicvf_addr_write(door, to_fill);
-- 
2.7.4



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