diff options
author | 2016-12-08 14:07:29 +0100 | |
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committer | 2016-12-12 15:41:56 +0100 | |
commit | 3d9b72106bd664b1267533e7278ff817f942e3c6 (patch) | |
tree | 52a6964f40e029d55d73bc18208971eff2297891 /examples/vhost | |
parent | a83862b166241910d0474f801cb2e6afa4c6875b (diff) |
Imported Upstream version 16.11
Change-Id: I1944c65ddc88a9ad70f8c0eb6731552b84fbcb77
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Diffstat (limited to 'examples/vhost')
-rw-r--r-- | examples/vhost/main.c | 125 |
1 files changed, 69 insertions, 56 deletions
diff --git a/examples/vhost/main.c b/examples/vhost/main.c index 92a98233..07098594 100644 --- a/examples/vhost/main.c +++ b/examples/vhost/main.c @@ -90,9 +90,6 @@ /* Size of buffers used for snprintfs. */ #define MAX_PRINT_BUFF 6072 -/* Maximum character device basename size. */ -#define MAX_BASENAME_SZ 10 - /* Maximum long option length for option parsing. */ #define MAX_LONG_OPT_SZ 64 @@ -109,9 +106,6 @@ static uint32_t num_devices; static struct rte_mempool *mbuf_pool; static int mergeable; -/* Do vlan strip on host, enabled on default */ -static uint32_t vlan_strip = 1; - /* Enable VM2VM communications. If this is disabled then the MAC address compare is skipped. */ typedef enum { VM2VM_DISABLED = 0, @@ -133,14 +127,16 @@ static uint32_t enable_tx_csum; static uint32_t enable_tso; static int client_mode; +static int dequeue_zero_copy; /* Specify timeout (in useconds) between retries on RX. */ static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US; /* Specify the number of retries on RX. */ static uint32_t burst_rx_retry_num = BURST_RX_RETRIES; -/* Character device basename. Can be set by user. */ -static char dev_basename[MAX_BASENAME_SZ] = "vhost-net"; +/* Socket file paths. Can be set by user */ +static char *socket_files; +static int nb_sockets; /* empty vmdq configuration structure. Filled in programatically */ static struct rte_eth_conf vmdq_conf_default = { @@ -299,6 +295,17 @@ port_init(uint8_t port) rx_ring_size = RTE_TEST_RX_DESC_DEFAULT; tx_ring_size = RTE_TEST_TX_DESC_DEFAULT; + + /* + * When dequeue zero copy is enabled, guest Tx used vring will be + * updated only when corresponding mbuf is freed. Thus, the nb_tx_desc + * (tx_ring_size here) must be small enough so that the driver will + * hit the free threshold easily and free mbufs timely. Otherwise, + * guest Tx vring would be starved. + */ + if (dequeue_zero_copy) + tx_ring_size = 64; + tx_rings = (uint16_t)rte_lcore_count(); retval = validate_num_devices(MAX_DEVICES); @@ -392,17 +399,18 @@ port_init(uint8_t port) } /* - * Set character device basename. + * Set socket file path. */ static int -us_vhost_parse_basename(const char *q_arg) +us_vhost_parse_socket_path(const char *q_arg) { /* parse number string */ - - if (strnlen(q_arg, MAX_BASENAME_SZ) > MAX_BASENAME_SZ) + if (strnlen(q_arg, PATH_MAX) > PATH_MAX) return -1; - else - snprintf((char*)&dev_basename, MAX_BASENAME_SZ, "%s", q_arg); + + socket_files = realloc(socket_files, PATH_MAX * (nb_sockets + 1)); + snprintf(socket_files + nb_sockets * PATH_MAX, PATH_MAX, "%s", q_arg); + nb_sockets++; return 0; } @@ -462,7 +470,7 @@ us_vhost_usage(const char *prgname) RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n" " --vm2vm [0|1|2]\n" " --rx_retry [0|1] --mergeable [0|1] --stats [0-N]\n" - " --dev-basename <name>\n" + " --socket-file <path>\n" " --nb-devices ND\n" " -p PORTMASK: Set mask for ports to be used by application\n" " --vm2vm [0|1|2]: disable/software(default)/hardware vm2vm comms\n" @@ -470,12 +478,12 @@ us_vhost_usage(const char *prgname) " --rx-retry-delay [0-N]: timeout(in usecond) between retries on RX. This makes effect only if retries on rx enabled\n" " --rx-retry-num [0-N]: the number of retries on rx. This makes effect only if retries on rx enabled\n" " --mergeable [0|1]: disable(default)/enable RX mergeable buffers\n" - " --vlan-strip [0|1]: disable/enable(default) RX VLAN strip on host\n" " --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n" - " --dev-basename: The basename to be used for the character device.\n" + " --socket-file: The path of the socket file.\n" " --tx-csum [0|1] disable/enable TX checksum offload.\n" " --tso [0|1] disable/enable TCP segment offload.\n" - " --client register a vhost-user socket as client mode.\n", + " --client register a vhost-user socket as client mode.\n" + " --dequeue-zero-copy enables dequeue zero copy\n", prgname); } @@ -495,12 +503,12 @@ us_vhost_parse_args(int argc, char **argv) {"rx-retry-delay", required_argument, NULL, 0}, {"rx-retry-num", required_argument, NULL, 0}, {"mergeable", required_argument, NULL, 0}, - {"vlan-strip", required_argument, NULL, 0}, {"stats", required_argument, NULL, 0}, - {"dev-basename", required_argument, NULL, 0}, + {"socket-file", required_argument, NULL, 0}, {"tx-csum", required_argument, NULL, 0}, {"tso", required_argument, NULL, 0}, {"client", no_argument, &client_mode, 1}, + {"dequeue-zero-copy", no_argument, &dequeue_zero_copy, 1}, {NULL, 0, 0, 0}, }; @@ -618,27 +626,12 @@ us_vhost_parse_args(int argc, char **argv) } } - /* Enable/disable RX VLAN strip on host. */ - if (!strncmp(long_option[option_index].name, - "vlan-strip", MAX_LONG_OPT_SZ)) { - ret = parse_num_opt(optarg, 1); - if (ret == -1) { - RTE_LOG(INFO, VHOST_CONFIG, - "Invalid argument for VLAN strip [0|1]\n"); - us_vhost_usage(prgname); - return -1; - } else { - vlan_strip = !!ret; - vmdq_conf_default.rxmode.hw_vlan_strip = - vlan_strip; - } - } - /* Enable/disable stats. */ if (!strncmp(long_option[option_index].name, "stats", MAX_LONG_OPT_SZ)) { ret = parse_num_opt(optarg, INT32_MAX); if (ret == -1) { - RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for stats [0..N]\n"); + RTE_LOG(INFO, VHOST_CONFIG, + "Invalid argument for stats [0..N]\n"); us_vhost_usage(prgname); return -1; } else { @@ -646,10 +639,13 @@ us_vhost_parse_args(int argc, char **argv) } } - /* Set character device basename. */ - if (!strncmp(long_option[option_index].name, "dev-basename", MAX_LONG_OPT_SZ)) { - if (us_vhost_parse_basename(optarg) == -1) { - RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for character device basename (Max %d characters)\n", MAX_BASENAME_SZ); + /* Set socket file path. */ + if (!strncmp(long_option[option_index].name, + "socket-file", MAX_LONG_OPT_SZ)) { + if (us_vhost_parse_socket_path(optarg) == -1) { + RTE_LOG(INFO, VHOST_CONFIG, + "Invalid argument for socket name (Max %d characters)\n", + PATH_MAX); us_vhost_usage(prgname); return -1; } @@ -761,10 +757,7 @@ link_vmdq(struct vhost_dev *vdev, struct rte_mbuf *m) "(%d) failed to add device MAC address to VMDQ\n", vdev->vid); - /* Enable stripping of the vlan tag as we handle routing. */ - if (vlan_strip) - rte_eth_dev_set_vlan_strip_on_queue(ports[0], - (uint16_t)vdev->vmdq_rx_q, 1); + rte_eth_dev_set_vlan_strip_on_queue(ports[0], vdev->vmdq_rx_q, 1); /* Set device as ready for RX. */ vdev->ready = DEVICE_RX; @@ -1340,14 +1333,27 @@ print_stats(void) } } +static void +unregister_drivers(int socket_num) +{ + int i, ret; + + for (i = 0; i < socket_num; i++) { + ret = rte_vhost_driver_unregister(socket_files + i * PATH_MAX); + if (ret != 0) + RTE_LOG(ERR, VHOST_CONFIG, + "Fail to unregister vhost driver for %s.\n", + socket_files + i * PATH_MAX); + } +} + /* When we receive a INT signal, unregister vhost driver */ static void sigint_handler(__rte_unused int signum) { /* Unregister vhost driver. */ - int ret = rte_vhost_driver_unregister((char *)&dev_basename); - if (ret != 0) - rte_exit(EXIT_FAILURE, "vhost driver unregister failure.\n"); + unregister_drivers(nb_sockets); + exit(0); } @@ -1403,15 +1409,14 @@ create_mbuf_pool(uint16_t nr_port, uint32_t nr_switch_core, uint32_t mbuf_size, } /* - * Main function, does initialisation and calls the per-lcore functions. The CUSE - * device is also registered here to handle the IOCTLs. + * Main function, does initialisation and calls the per-lcore functions. */ int main(int argc, char *argv[]) { unsigned lcore_id, core_id = 0; unsigned nb_ports, valid_num_ports; - int ret; + int ret, i; uint8_t portid; static pthread_t tid; char thread_name[RTE_MAX_THREAD_NAME_LEN]; @@ -1509,14 +1514,22 @@ main(int argc, char *argv[]) if (client_mode) flags |= RTE_VHOST_USER_CLIENT; - /* Register vhost(cuse or user) driver to handle vhost messages. */ - ret = rte_vhost_driver_register(dev_basename, flags); - if (ret != 0) - rte_exit(EXIT_FAILURE, "vhost driver register failure.\n"); + if (dequeue_zero_copy) + flags |= RTE_VHOST_USER_DEQUEUE_ZERO_COPY; + + /* Register vhost user driver to handle vhost messages. */ + for (i = 0; i < nb_sockets; i++) { + ret = rte_vhost_driver_register + (socket_files + i * PATH_MAX, flags); + if (ret != 0) { + unregister_drivers(i); + rte_exit(EXIT_FAILURE, + "vhost driver register failure.\n"); + } + } rte_vhost_driver_callback_register(&virtio_net_device_ops); - /* Start CUSE session. */ rte_vhost_driver_session_start(); return 0; |