test/mempool: use compiler atomics for lcores sync

Convert rte_atomic usages to compiler atomic built-ins for lcores
sync in mempool_perf testcases. Meanwhile, remove unnecessary
synchro init as it would be set to 0 when launching cores.

Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/app/test/test_mempool_perf.c b/app/test/test_mempool_perf.c
index d7d0aaa..8f62973 100644 (file)
--- a/app/test/test_mempool_perf.c
+++ b/app/test/test_mempool_perf.c
@@ -20,7 +20,6 @@
 #include <rte_eal.h>
 #include <rte_per_lcore.h>
 #include <rte_lcore.h>
-#include <rte_atomic.h>
 #include <rte_branch_prediction.h>
 #include <rte_mempool.h>
 #include <rte_spinlock.h>
@@ -83,7 +82,7 @@
 static int use_external_cache;
 static unsigned external_cache_size = RTE_MEMPOOL_CACHE_MAX_SIZE;
 
-static rte_atomic32_t synchro;
+static uint32_t synchro;
 
 /* number of objects in one bulk operation (get or put) */
 static unsigned n_get_bulk;
@@ -145,7 +144,7 @@ per_lcore_mempool_test(void *arg)
 
        /* wait synchro for workers */
        if (lcore_id != rte_get_main_lcore())
-               while (rte_atomic32_read(&synchro) == 0);
+               rte_wait_until_equal_32(&synchro, 1, __ATOMIC_RELAXED);
 
        start_cycles = rte_get_timer_cycles();
 
@@ -198,7 +197,7 @@ launch_cores(struct rte_mempool *mp, unsigned int cores)
        int ret;
        unsigned cores_save = cores;
 
-       rte_atomic32_set(&synchro, 0);
+       __atomic_store_n(&synchro, 0, __ATOMIC_RELAXED);
 
        /* reset stats */
        memset(stats, 0, sizeof(stats));
@@ -223,7 +222,7 @@ launch_cores(struct rte_mempool *mp, unsigned int cores)
        }
 
        /* start synchro and launch test on main */
-       rte_atomic32_set(&synchro, 1);
+       __atomic_store_n(&synchro, 1, __ATOMIC_RELAXED);
 
        ret = per_lcore_mempool_test(mp);
 
@@ -288,8 +287,6 @@ test_mempool_perf(void)
        const char *default_pool_ops;
        int ret = -1;
 
-       rte_atomic32_init(&synchro);
-
        /* create a mempool (without cache) */
        mp_nocache = rte_mempool_create("perf_test_nocache", MEMPOOL_SIZE,
                                        MEMPOOL_ELT_SIZE, 0, 0,