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...@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com>
Reviewed-by: Jerin Jacob <jer...@marvell.com>
---
drivers/event/opdl/Makefile | 1 +
drivers/event/opdl/meson.build | 1 +
drivers/event/opdl/opdl_ring.c | 5 ++---
3 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/event/opdl/Makefile b/drivers/event/opdl/Makefile
index bf50a60..72ef07d 100644
--- a/drivers/event/opdl/Makefile
+++ b/drivers/event/opdl/Makefile
@@ -9,6 +9,7 @@ LIB = librte_pmd_opdl_event.a
# build flags
CFLAGS += -O3
CFLAGS += $(WERROR_FLAGS)
+CFLAGS += -DALLOW_EXPERIMENTAL_API
# for older GCC versions, allow us to initialize an event using
# designated initializers.
ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
diff --git a/drivers/event/opdl/meson.build b/drivers/event/opdl/meson.build
index 1fe034e..e67b164 100644
--- a/drivers/event/opdl/meson.build
+++ b/drivers/event/opdl/meson.build
@@ -1,6 +1,7 @@
# SPDX-License-Identifier: BSD-3-Clause
# Copyright(c) 2018 Luca Boccassi <bl...@debian.org>
+allow_experimental_apis = true
sources = files(
'opdl_evdev.c',
'opdl_evdev_init.c',
diff --git a/drivers/event/opdl/opdl_ring.c b/drivers/event/opdl/opdl_ring.c
index 06fb5b3..c8d19fe 100644
--- a/drivers/event/opdl/opdl_ring.c
+++ b/drivers/event/opdl/opdl_ring.c
@@ -16,6 +16,7 @@
#include <rte_memcpy.h>
#include <rte_memory.h>
#include <rte_memzone.h>
+#include <rte_atomic.h>
#include "opdl_ring.h"
#include "opdl_log.h"
@@ -474,9 +475,7 @@ opdl_ring_input_multithread(struct opdl_ring *t, const void
*entries,
/* If another thread started inputting before this one, but hasn't
* finished, we need to wait for it to complete to update the tail.
*/
- while (unlikely(__atomic_load_n(&s->shared.tail, __ATOMIC_ACQUIRE) !=
- old_head))
- rte_pause();
+ rte_wait_until_equal_32(&s->shared.tail, old_head, __ATOMIC_ACQUIRE);
__atomic_store_n(&s->shared.tail, old_head + num_entries,
__ATOMIC_RELEASE);
--
2.7.4
