examples/l2fwd-jobstats: use compiler atomics for stats sync

Convert rte_atomic usages to compiler atomic built-ins
for stats_read_pending sync in l2fwd_jobstats module.

Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>

diff --git a/examples/l2fwd-jobstats/main.c b/examples/l2fwd-jobstats/main.c
index 0628032..6298166 100644 (file)
--- a/examples/l2fwd-jobstats/main.c
+++ b/examples/l2fwd-jobstats/main.c
@@ -16,7 +16,6 @@
 #include <rte_memcpy.h>
 #include <rte_eal.h>
 #include <rte_launch.h>
-#include <rte_atomic.h>
 #include <rte_cycles.h>
 #include <rte_prefetch.h>
 #include <rte_lcore.h>
@@ -81,7 +80,7 @@ struct lcore_queue_conf {
        struct rte_jobstats idle_job;
        struct rte_jobstats_context jobs_context;
 
-       rte_atomic16_t stats_read_pending;
+       uint16_t stats_read_pending;
        rte_spinlock_t lock;
 } __rte_cache_aligned;
 /* >8 End of list of queues to be polled for given lcore. */
@@ -155,9 +154,9 @@ show_lcore_stats(unsigned lcore_id)
        uint64_t collection_time = rte_get_timer_cycles();
 
        /* Ask forwarding thread to give us stats. */
-       rte_atomic16_set(&qconf->stats_read_pending, 1);
+       __atomic_store_n(&qconf->stats_read_pending, 1, __ATOMIC_RELAXED);
        rte_spinlock_lock(&qconf->lock);
-       rte_atomic16_set(&qconf->stats_read_pending, 0);
+       __atomic_store_n(&qconf->stats_read_pending, 0, __ATOMIC_RELAXED);
 
        /* Collect context statistics. */
        stats_period = ctx->state_time - ctx->start_time;
@@ -526,8 +525,8 @@ l2fwd_main_loop(void)
                                repeats++;
                                need_manage = qconf->flush_timer.expire < now;
                                /* Check if we was esked to give a stats. */
-                               stats_read_pending =
-                                               rte_atomic16_read(&qconf->stats_read_pending);
+                               stats_read_pending = __atomic_load_n(&qconf->stats_read_pending,
+                                               __ATOMIC_RELAXED);
                                need_manage |= stats_read_pending;
 
                                for (i = 0; i < qconf->n_rx_port && !need_manage; i++)