[TEST] dpdk/app/test/test_mbuf.c test_refcnt_mbuf instability + fix proposal

[Julien Hascoet <jhascoet@kalrayinc.com>]

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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



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