Hello, from my understanding after debugging, in test_refcnt_iter the return value of rte_ring_enqueue is not checked; leading to lack of expected mbufs at the end checks. Here is some fix proposal that seems to work after running endurance tests for several days: diff --git a/app/test/test_mbuf.c b/app/test/test_mbuf.c index b4f436b5e2..8a5d26e4f6 100644 --- a/app/test/test_mbuf.c +++ b/app/test/test_mbuf.c @@ -1033,12 +1033,17 @@ test_refcnt_iter(unsigned int lcore, unsigned int iter, tref += ref; if ((ref & 1) != 0) { rte_pktmbuf_refcnt_update(m, ref); - while (ref-- != 0) - rte_ring_enqueue(refcnt_mbuf_ring, m); + while (ref-- != 0) { + /* retry in case of failure */ + while (rte_ring_enqueue(refcnt_mbuf_ring, m) != 0) + ; + } } else { while (ref-- != 0) { rte_pktmbuf_refcnt_update(m, 1); - rte_ring_enqueue(refcnt_mbuf_ring, m); + /* retry in case of failure */ + while (rte_ring_enqueue(refcnt_mbuf_ring, m) != 0) + ; } } rte_pktmbuf_free(m); Can you confirm ? Thank, Julien Hascoet