ring: use WFE to wait for tail update on aarch64

[dpdk.git] / lib / ring / rte_ring_c11_pvt.h

diff --git a/lib/ring/rte_ring_c11_pvt.h b/lib/ring/rte_ring_c11_pvt.h
index 759192f..37e0b2a 100644 (file)
--- a/lib/ring/rte_ring_c11_pvt.h
+++ b/lib/ring/rte_ring_c11_pvt.h
@@ -2,6 +2,7 @@
  *
  * Copyright (c) 2017,2018 HXT-semitech Corporation.
  * Copyright (c) 2007-2009 Kip Macy kmacy@freebsd.org
+ * Copyright (c) 2021 Arm Limited
  * All rights reserved.
  * Derived from FreeBSD's bufring.h
  * Used as BSD-3 Licensed with permission from Kip Macy.
@@ -21,8 +22,7 @@ __rte_ring_update_tail(struct rte_ring_headtail *ht, uint32_t old_val,
         * we need to wait for them to complete
         */
        if (!single)
-               while (unlikely(ht->tail != old_val))
-                       rte_pause();
+               rte_wait_until_equal_32(&ht->tail, old_val, __ATOMIC_RELAXED);
 
        __atomic_store_n(&ht->tail, new_val, __ATOMIC_RELEASE);
 }