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authorjaszha03 <jason.zhang2@arm.com>2019-09-27 11:48:23 -0500
committerDamjan Marion <dmarion@me.com>2019-09-27 18:31:28 +0000
commit18512b002da5da312aa2638b67a8ec4bb2c10236 (patch)
tree8352b21d647e6d3b03d9f43c4f42e0e654ed7266
parentb325983a4461dd806e86a31abc47533b09482157 (diff)
vppinfra: implement CLIB_PAUSE () for aarch64 platforms
Define CLIB_PAUSE () to generate the "yield" instruction. No significant performance changes were observed for clib_spinlock_t and clib_rwlock_t. Type: feature Change-Id: I59eb996e61c7a16007517e57e6996567302c1657 Signed-off-by: Jason Zhang <jason.zhang2@arm.com> Reviewed-by: Lijian Zhang <Lijian.Zhang@arm.com>
-rw-r--r--src/vppinfra/lock.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/vppinfra/lock.h b/src/vppinfra/lock.h
index 49e849b1bdd..3cfe11cba17 100644
--- a/src/vppinfra/lock.h
+++ b/src/vppinfra/lock.h
@@ -21,6 +21,8 @@
#if __x86_64__
#define CLIB_PAUSE() __builtin_ia32_pause ()
+#elif defined (__aarch64__) || defined (__arm__)
+#define CLIB_PAUSE() __asm__ ("yield")
#else
#define CLIB_PAUSE()
#endif