[dpdk-dev] [PATCH 2/2] app/testpmd: fix number of mbufs in pool

[Olivier Matz <olivier.matz@6wind.com>]

The number of mbufs in pools is not consistent depending on the
options passed by the user and the number of ports, especially
in numa mode, when the number of mbuf is specified by the user.

When the user specifies the number of mbuf (per pool), it should
overrides the default value.

- before the patch

./build/app/testpmd -- -i
  <mbuf_pool_socket_0>: n=331456, size=2176, socket=0
  <mbuf_pool_socket_1>: n=331456, size=2176, socket=1

./build/app/testpmd -- --total-num-mbufs=8000 -i
  <mbuf_pool_socket_0>: n=256000, size=2176, socket=0
  <mbuf_pool_socket_1>: n=256000, size=2176, socket=1
  # BAD, should be n=8000 for each socket

./build/app/testpmd -- --no-numa -i
  <mbuf_pool_socket_0>: n=331456, size=2176, socket=0

./build/app/testpmd -- --no-numa --total-num-mbufs=8000 -i
  <mbuf_pool_socket_0>: n=8000, size=2176, socket=0

./build/app/testpmd --vdev=eth_null0 --vdev=eth_null1 -- -i
  <mbuf_pool_socket_0>: n=331456, size=2176, socket=0
  <mbuf_pool_socket_1>: n=331456, size=2176, socket=1

./build/app/testpmd --vdev=eth_null0 --vdev=eth_null1 -- \
     --total-num-mbufs=8000 -i
  <mbuf_pool_socket_0>: n=128000, size=2176, socket=0
  <mbuf_pool_socket_1>: n=128000, size=2176, socket=1
  # BAD, should be n=8000 for each socket

./build/app/testpmd --vdev=eth_null0 --vdev=eth_null1 -- --no-numa -i
  <mbuf_pool_socket_0>: n=331456, size=2176, socket=0

./build/app/testpmd --vdev=eth_null0 --vdev=eth_null1 -- --no-numa \
     --total-num-mbufs=8000 -i
  <mbuf_pool_socket_0>: n=8000, size=2176, socket=0

- after the patch

./build/app/testpmd -- -i
  <mbuf_pool_socket_0>: n=331456, size=2176, socket=0
  <mbuf_pool_socket_1>: n=331456, size=2176, socket=1

./build/app/testpmd -- --total-num-mbufs=8000 -i
  <mbuf_pool_socket_0>: n=8000, size=2176, socket=0
  <mbuf_pool_socket_1>: n=8000, size=2176, socket=1

./build/app/testpmd -- --no-numa -i
  <mbuf_pool_socket_0>: n=331456, size=2176, socket=0

./build/app/testpmd -- --no-numa --total-num-mbufs=8000 -i
  <mbuf_pool_socket_0>: n=8000, size=2176, socket=0

./build/app/testpmd --vdev=eth_null0 --vdev=eth_null1 -- -i
  <mbuf_pool_socket_0>: n=331456, size=2176, socket=0
  <mbuf_pool_socket_1>: n=331456, size=2176, socket=1

./build/app/testpmd --vdev=eth_null0 --vdev=eth_null1 -- \
     --total-num-mbufs=8000 -i
  <mbuf_pool_socket_0>: n=8000, size=2176, socket=0
  <mbuf_pool_socket_1>: n=8000, size=2176, socket=1

./build/app/testpmd --vdev=eth_null0 --vdev=eth_null1 -- --no-numa -i
  <mbuf_pool_socket_0>: n=331456, size=2176, socket=0

./build/app/testpmd --vdev=eth_null0 --vdev=eth_null1 -- --no-numa \
     --total-num-mbufs=8000 -i
  <mbuf_pool_socket_0>: n=8000, size=2176, socket=0

Fixes: b6ea6408fbc7 ("ethdev: store numa_node per device")

CC: stable@dpdk.org
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
---
 app/test-pmd/testpmd.c | 65 +++++++++++++++++++++-----------------------------
 1 file changed, 27 insertions(+), 38 deletions(-)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index f61f31344..0c6a50ea3 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -543,34 +543,6 @@ init_config(void)
 		fwd_lcores[lc_id]->cpuid_idx = lc_id;
 	}
 
-	/*
-	 * Create pools of mbuf.
-	 * If NUMA support is disabled, create a single pool of mbuf in
-	 * socket 0 memory by default.
-	 * Otherwise, create a pool of mbuf in the memory of sockets 0 and 1.
-	 *
-	 * Use the maximum value of nb_rxd and nb_txd here, then nb_rxd and
-	 * nb_txd can be configured at run time.
-	 */
-	if (param_total_num_mbufs)
-		nb_mbuf_per_pool = param_total_num_mbufs;
-	else {
-		nb_mbuf_per_pool = RTE_TEST_RX_DESC_MAX + (nb_lcores * mb_mempool_cache)
-				+ RTE_TEST_TX_DESC_MAX + MAX_PKT_BURST;
-
-		if (!numa_support)
-			nb_mbuf_per_pool =
-				(nb_mbuf_per_pool * RTE_MAX_ETHPORTS);
-	}
-
-	if (!numa_support) {
-		if (socket_num == UMA_NO_CONFIG)
-			mbuf_pool_create(mbuf_data_size, nb_mbuf_per_pool, 0);
-		else
-			mbuf_pool_create(mbuf_data_size, nb_mbuf_per_pool,
-						 socket_num);
-	}
-
 	RTE_ETH_FOREACH_DEV(pid) {
 		port = &ports[pid];
 		rte_eth_dev_info_get(pid, &port->dev_info);
@@ -593,20 +565,37 @@ init_config(void)
 		port->need_reconfig_queues = 1;
 	}
 
+	/*
+	 * Create pools of mbuf.
+	 * If NUMA support is disabled, create a single pool of mbuf in
+	 * socket 0 memory by default.
+	 * Otherwise, create a pool of mbuf in the memory of sockets 0 and 1.
+	 *
+	 * Use the maximum value of nb_rxd and nb_txd here, then nb_rxd and
+	 * nb_txd can be configured at run time.
+	 */
+	if (param_total_num_mbufs)
+		nb_mbuf_per_pool = param_total_num_mbufs;
+	else {
+		nb_mbuf_per_pool = RTE_TEST_RX_DESC_MAX +
+			(nb_lcores * mb_mempool_cache) +
+			RTE_TEST_TX_DESC_MAX + MAX_PKT_BURST;
+		nb_mbuf_per_pool *= RTE_MAX_ETHPORTS;
+	}
+
 	if (numa_support) {
 		uint8_t i;
-		unsigned int nb_mbuf;
-
-		if (param_total_num_mbufs && nb_ports != 0)
-			nb_mbuf_per_pool = nb_mbuf_per_pool/nb_ports;
 
-		for (i = 0; i < max_socket; i++) {
-			nb_mbuf = (nb_mbuf_per_pool * RTE_MAX_ETHPORTS);
-			if (nb_mbuf)
-				mbuf_pool_create(mbuf_data_size,
-						nb_mbuf,i);
-		}
+		for (i = 0; i < max_socket; i++)
+			mbuf_pool_create(mbuf_data_size, nb_mbuf_per_pool, i);
+	} else {
+		if (socket_num == UMA_NO_CONFIG)
+			mbuf_pool_create(mbuf_data_size, nb_mbuf_per_pool, 0);
+		else
+			mbuf_pool_create(mbuf_data_size, nb_mbuf_per_pool,
+						 socket_num);
 	}
+
 	init_port_config();
 
 	/*
-- 
2.11.0