examples/qos_sched: fix flow pause after 2M packets

After enable vector pmd, qos_sched only send 32 packets every burst.
That will cause some packets not transmitted and therefore mempool
will be drain after a while.
App qos_sched now will re-send the packets which failed to send out in
previous tx function.

Signed-off-by: Yong Liu <yong.liu@intel.com>
Acked-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Tested-by: Waterman Cao <waterman.cao@intel.com>

diff --git a/examples/qos_sched/app_thread.c b/examples/qos_sched/app_thread.c
index 7501147..59c4014 100755 (executable)
--- a/examples/qos_sched/app_thread.c
+++ b/examples/qos_sched/app_thread.c
@@ -139,17 +139,11 @@ app_send_burst(struct thread_conf *qconf)
 
        do {
                ret = rte_eth_tx_burst(qconf->tx_port, qconf->tx_queue, mbufs, (uint16_t)n);
-               if (unlikely(ret < n)) { /* we cannot drop the packets, so re-send */
-                       /* update number of packets to be sent */
-                       n -= ret;
-                       mbufs = (struct rte_mbuf **)&mbufs[ret];
-                       /* limit number of retries to avoid endless loop */
-                       /* reset retry counter if some packets were sent */
-                       if (likely(ret != 0)) {
-                               continue;
-                       }
-               }
-       } while (ret != n);
+               /* we cannot drop the packets, so re-send */
+               /* update number of packets to be sent */
+               n -= ret;
+               mbufs = (struct rte_mbuf **)&mbufs[ret];
+       } while (n);
 }