test/distributor: fix spurious failure

Sanity test could spuriously fail with reporting flush count error.
It was caused by worker stat coherent issue between distributor and
worker thread.
Fix this issue by using atomic operations to update worker stat.

Fixes: c3eabff124e6 ("distributor: add unit tests")
Cc: stable@dpdk.org
Signed-off-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Gavin Hu <gavin.hu@arm.com>
Acked-by: David Hunt <david.hunt@intel.com>

diff --git a/app/test/test_distributor.c b/app/test/test_distributor.c
index 7090b55f88c72aa328e17a334c5877dad85751f9..ba1f81cf8d19d76a48d1ecedfa1e9092a0efa956 100644 (file)
--- a/app/test/test_distributor.c
+++ b/app/test/test_distributor.c
@@ -70,12 +70,14 @@ handle_work(void *arg)
                buf[i] = NULL;
        num = rte_distributor_get_pkt(db, id, buf, buf, num);
        while (!quit) {
-               worker_stats[id].handled_packets += num;
+               __atomic_fetch_add(&worker_stats[id].handled_packets, num,
+                               __ATOMIC_RELAXED);
                count += num;
                num = rte_distributor_get_pkt(db, id,
                                buf, buf, num);
        }
-       worker_stats[id].handled_packets += num;
+       __atomic_fetch_add(&worker_stats[id].handled_packets, num,
+                       __ATOMIC_RELAXED);
        count += num;
        rte_distributor_return_pkt(db, id, buf, num);
        return 0;