examples/multi_process: fix buffer underrun

[ upstream commit 7c22ccd ]

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: af75078 ("first public release")

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>

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 */