examples/multi_process: fix buffer underrun

For client_server_mp, the total number of buffers for the mbuf mempool
should be correctly calculated. Otherwise, having more clients will stop
traffic.

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org
Signed-off-by: Yongseok Koh <yskoh@mellanox.com>

diff --git a/examples/multi_process/client_server_mp/mp_server/init.c b/examples/multi_process/client_server_mp/mp_server/init.c
index 30c8e44..3af5dc6 100644 (file)
--- a/examples/multi_process/client_server_mp/mp_server/init.c
+++ b/examples/multi_process/client_server_mp/mp_server/init.c
@@ -37,8 +37,6 @@
 #include "args.h"
 #include "init.h"
 
-#define MBUFS_PER_CLIENT 1536
-#define MBUFS_PER_PORT 1536
 #define MBUF_CACHE_SIZE 512
 
 #define RTE_MP_RX_DESC_DEFAULT 1024
@@ -63,8 +61,15 @@ struct port_info *ports;
 static int
 init_mbuf_pools(void)
 {
-       const unsigned num_mbufs = (num_clients * MBUFS_PER_CLIENT) \
-                       + (ports->num_ports * MBUFS_PER_PORT);
+       const unsigned int num_mbufs_server =
+               RTE_MP_RX_DESC_DEFAULT * ports->num_ports;
+       const unsigned int num_mbufs_client =
+               num_clients * (CLIENT_QUEUE_RINGSIZE +
+                              RTE_MP_TX_DESC_DEFAULT * ports->num_ports);
+       const unsigned int num_mbufs_mp_cache =
+               (num_clients + 1) * MBUF_CACHE_SIZE;
+       const unsigned int num_mbufs =
+               num_mbufs_server + num_mbufs_client + num_mbufs_mp_cache;
 
        /* don't pass single-producer/single-consumer flags to mbuf create as it
         * seems faster to use a cache instead */