[dpdk-dev] [PATCH v5 7/8] net/thunderx: use new API to save cycles on aarch64
From: Gavin Hu <hidden>
Date: 2019-09-12 11:27:16
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> Reviewed-by: Ruifeng Wang <redacted> --- 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