Sample vhost need know the queue number user want to enable for each virtio
device,
so add the new option '--rxq' into it.
Signed-off-by: Changchun Ouyang <changchun.ouyang at intel.com>
---
Changes in v3
- fix coding style
Changes in v2
- refine help info
- check if rxq = 0
- fix checkpatch errors
examples/vhost/main.c | 49 +++++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 45 insertions(+), 4 deletions(-)
diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index d3c45dd..5b811af 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -163,6 +163,9 @@ static int mergeable;
/* Do vlan strip on host, enabled on default */
static uint32_t vlan_strip = 1;
+/* Rx queue number per virtio device */
+static uint32_t rxq = 1;
+
/* number of descriptors to apply*/
static uint32_t num_rx_descriptor = RTE_TEST_RX_DESC_DEFAULT_ZCP;
static uint32_t num_tx_descriptor = RTE_TEST_TX_DESC_DEFAULT_ZCP;
@@ -408,8 +411,19 @@ port_init(uint8_t port)
txconf->tx_deferred_start = 1;
}
- /*configure the number of supported virtio devices based on VMDQ limits
*/
- num_devices = dev_info.max_vmdq_pools;
+ /* Configure the virtio devices num based on VMDQ limits */
+ switch (rxq) {
+ case 1:
+ case 2:
+ num_devices = dev_info.max_vmdq_pools;
+ break;
+ case 4:
+ num_devices = dev_info.max_vmdq_pools / 2;
+ break;
+ default:
+ RTE_LOG(ERR, VHOST_CONFIG, "rxq invalid for VMDq.\n");
+ return -1;
+ }
if (zero_copy) {
rx_ring_size = num_rx_descriptor;
@@ -431,7 +445,7 @@ port_init(uint8_t port)
return retval;
/* NIC queues are divided into pf queues and vmdq queues. */
num_pf_queues = dev_info.max_rx_queues - dev_info.vmdq_queue_num;
- queues_per_pool = dev_info.vmdq_queue_num / dev_info.max_vmdq_pools;
+ queues_per_pool = dev_info.vmdq_queue_num / num_devices;
num_vmdq_queues = num_devices * queues_per_pool;
num_queues = num_pf_queues + num_vmdq_queues;
vmdq_queue_base = dev_info.vmdq_queue_base;
@@ -576,7 +590,8 @@ us_vhost_usage(const char *prgname)
" --rx-desc-num [0-N]: the number of descriptors on rx, "
"used only when zero copy is enabled.\n"
" --tx-desc-num [0-N]: the number of descriptors on tx, "
- "used only when zero copy is enabled.\n",
+ "used only when zero copy is enabled.\n"
+ " --rxq [1,2,4]: rx queue number for each vhost device\n",
prgname);
}
@@ -602,6 +617,7 @@ us_vhost_parse_args(int argc, char **argv)
{"zero-copy", required_argument, NULL, 0},
{"rx-desc-num", required_argument, NULL, 0},
{"tx-desc-num", required_argument, NULL, 0},
+ {"rxq", required_argument, NULL, 0},
{NULL, 0, 0, 0},
};
@@ -778,6 +794,18 @@ us_vhost_parse_args(int argc, char **argv)
}
}
+ /* Specify the Rx queue number for each vhost dev. */
+ if (!strncmp(long_option[option_index].name,
+ "rxq", MAX_LONG_OPT_SZ)) {
+ ret = parse_num_opt(optarg, 4);
+ if ((ret == -1) || (ret == 0) ||
(!POWEROF2(ret))) {
+ RTE_LOG(INFO, VHOST_CONFIG,
+ "Valid value for rxq is [1,2,4]\n");
+ us_vhost_usage(prgname);
+ return -1;
+ } else
+ rxq = ret;
+ }
break;
/* Invalid option - print options. */
@@ -813,6 +841,19 @@ us_vhost_parse_args(int argc, char **argv)
return -1;
}
+ if (rxq > 1) {
+ vmdq_conf_default.rxmode.mq_mode = ETH_MQ_RX_VMDQ_RSS;
+ vmdq_conf_default.rx_adv_conf.rss_conf.rss_hf = ETH_RSS_IP |
+ ETH_RSS_UDP | ETH_RSS_TCP | ETH_RSS_SCTP;
+ }
+
+ if ((zero_copy == 1) && (rxq > 1)) {
+ RTE_LOG(INFO, VHOST_PORT,
+ "Vhost zero copy doesn't support mq mode,"
+ "please specify '--rxq 1' to disable it.\n");
+ return -1;
+ }
+
return 0;
}
--
1.8.4.2
