[dpdk-dev] [PATCH v2 3/8] test/rwlock: use GCC atomic builtins for lcores sync

[Joyce Kong]

Convert rte_atomic usages to GCC atomic builtins for lcores sync
in rwlock testcases.

Signed-off-by: Joyce Kong <joyce.k...@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com>
Acked-by: Stephen Hemminger <step...@networkplumber.org>
---
 app/test/test_rwlock.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/app/test/test_rwlock.c b/app/test/test_rwlock.c
index b47150a86..f2d1c8883 100644
--- a/app/test/test_rwlock.c
+++ b/app/test/test_rwlock.c
@@ -13,7 +13,6 @@
 #include <rte_memory.h>
 #include <rte_per_lcore.h>
 #include <rte_launch.h>
-#include <rte_atomic.h>
 #include <rte_rwlock.h>
 #include <rte_eal.h>
 #include <rte_lcore.h>
@@ -36,7 +35,7 @@
 
 static rte_rwlock_t sl;
 static rte_rwlock_t sl_tab[RTE_MAX_LCORE];
-static rte_atomic32_t synchro;
+static uint32_t synchro;
 
 enum {
        LC_TYPE_RDLOCK,
@@ -102,8 +101,7 @@ load_loop_fn(__rte_unused void *arg)
 
        /* wait synchro for workers */
        if (lcore != rte_get_main_lcore())
-               while (rte_atomic32_read(&synchro) == 0)
-                       ;
+               rte_wait_until_equal_32(&synchro, 1, __ATOMIC_RELAXED);
 
        begin = rte_rdtsc_precise();
        while (lcount < MAX_LOOP) {
@@ -136,12 +134,12 @@ test_rwlock_perf(void)
        printf("\nRwlock Perf Test on %u cores...\n", rte_lcore_count());
 
        /* clear synchro and start workers */
-       rte_atomic32_set(&synchro, 0);
+       __atomic_store_n(&synchro, 0, __ATOMIC_RELAXED);
        if (rte_eal_mp_remote_launch(load_loop_fn, NULL, SKIP_MAIN) < 0)
                return -1;
 
        /* start synchro and launch test on main */
-       rte_atomic32_set(&synchro, 1);
+       __atomic_store_n(&synchro, 1, __ATOMIC_RELAXED);
        load_loop_fn(NULL);
 
        rte_eal_mp_wait_lcore();
-- 
2.17.1