1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
12 #include <sys/queue.h>
16 #include <rte_common.h>
17 #include <rte_memory.h>
19 #include <rte_launch.h>
20 #include <rte_per_lcore.h>
21 #include <rte_lcore.h>
22 #include <rte_branch_prediction.h>
23 #include <rte_atomic.h>
26 #include <rte_debug.h>
27 #include <rte_mempool.h>
28 #include <rte_memcpy.h>
30 #include <rte_ether.h>
31 #include <rte_interrupts.h>
32 #include <rte_ethdev.h>
33 #include <rte_byteorder.h>
34 #include <rte_malloc.h>
35 #include <rte_string_fns.h>
42 * When doing reads from the NIC or the client queues,
45 #define PACKET_READ_SIZE 32
48 * Local buffers to put packets in, used to send packets in bursts to the
51 struct client_rx_buf {
52 struct rte_mbuf *buffer[PACKET_READ_SIZE];
56 /* One buffer per client rx queue - dynamically allocate array */
57 static struct client_rx_buf *cl_rx_buf;
60 get_printable_mac_addr(uint16_t port)
62 static const struct rte_ether_addr null_mac; /* static defaults to 0 */
63 static char err_address[32];
64 static char addresses[RTE_MAX_ETHPORTS][32];
67 if (unlikely(port >= RTE_MAX_ETHPORTS)) {
68 if (err_address[0] == '\0')
69 rte_ether_format_addr(err_address,
70 sizeof(err_address), &null_mac);
73 if (unlikely(addresses[port][0]=='\0')){
74 struct rte_ether_addr mac;
75 ret = rte_eth_macaddr_get(port, &mac);
77 printf("Failed to get MAC address (port %u): %s\n",
78 port, rte_strerror(-ret));
81 rte_ether_format_addr(addresses[port],
82 sizeof(addresses[port]), &mac);
84 return addresses[port];
88 * This function displays the recorded statistics for each port
89 * and for each client. It uses ANSI terminal codes to clear
90 * screen when called. It is called from a single worker
91 * thread in the server process, when the process is run with more
92 * than one lcore enabled.
95 do_stats_display(void)
98 const char clr[] = { 27, '[', '2', 'J', '\0' };
99 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
100 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS];
101 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS];
103 /* to get TX stats, we need to do some summing calculations */
104 memset(port_tx, 0, sizeof(port_tx));
105 memset(port_tx_drop, 0, sizeof(port_tx_drop));
106 memset(client_tx, 0, sizeof(client_tx));
107 memset(client_tx_drop, 0, sizeof(client_tx_drop));
109 for (i = 0; i < num_clients; i++){
110 const volatile struct tx_stats *tx = &ports->tx_stats[i];
111 for (j = 0; j < ports->num_ports; j++){
112 /* assign to local variables here, save re-reading volatile vars */
113 const uint64_t tx_val = tx->tx[ports->id[j]];
114 const uint64_t drop_val = tx->tx_drop[ports->id[j]];
115 port_tx[j] += tx_val;
116 port_tx_drop[j] += drop_val;
117 client_tx[i] += tx_val;
118 client_tx_drop[i] += drop_val;
122 /* Clear screen and move to top left */
123 printf("%s%s", clr, topLeft);
127 for (i = 0; i < ports->num_ports; i++)
128 printf("Port %u: '%s'\t", (unsigned)ports->id[i],
129 get_printable_mac_addr(ports->id[i]));
131 for (i = 0; i < ports->num_ports; i++){
132 printf("Port %u - rx: %9"PRIu64"\t"
134 (unsigned)ports->id[i], ports->rx_stats.rx[i],
138 printf("\nCLIENTS\n");
140 for (i = 0; i < num_clients; i++){
141 const unsigned long long rx = clients[i].stats.rx;
142 const unsigned long long rx_drop = clients[i].stats.rx_drop;
143 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n"
144 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n",
145 i, rx, rx_drop, client_tx[i], client_tx_drop[i]);
152 * The function called from each worker lcore used by the process.
153 * The test_and_set function is used to randomly pick a single lcore on which
154 * the code to display the statistics will run. Otherwise, the code just
158 sleep_lcore(__rte_unused void *dummy)
160 /* Used to pick a display thread - static, so zero-initialised */
161 static rte_atomic32_t display_stats;
163 /* Only one core should display stats */
164 if (rte_atomic32_test_and_set(&display_stats)) {
165 const unsigned sleeptime = 1;
166 printf("Core %u displaying statistics\n", rte_lcore_id());
168 /* Longer initial pause so above printf is seen */
169 sleep(sleeptime * 3);
171 /* Loop forever: sleep always returns 0 or <= param */
172 while (sleep(sleeptime) <= sleeptime)
179 * Function to set all the client statistic values to zero.
180 * Called at program startup.
187 for (i = 0; i < num_clients; i++)
188 clients[i].stats.rx = clients[i].stats.rx_drop = 0;
192 * send a burst of traffic to a client, assuming there are packets
193 * available to be sent to this client
196 flush_rx_queue(uint16_t client)
201 if (cl_rx_buf[client].count == 0)
204 cl = &clients[client];
205 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer,
206 cl_rx_buf[client].count, NULL) == 0){
207 for (j = 0; j < cl_rx_buf[client].count; j++)
208 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]);
209 cl->stats.rx_drop += cl_rx_buf[client].count;
212 cl->stats.rx += cl_rx_buf[client].count;
214 cl_rx_buf[client].count = 0;
218 * marks a packet down to be sent to a particular client process
221 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf)
223 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf;
227 * This function takes a group of packets and routes them
228 * individually to the client process. Very simply round-robins the packets
229 * without checking any of the packet contents.
232 process_packets(uint32_t port_num __rte_unused,
233 struct rte_mbuf *pkts[], uint16_t rx_count)
238 for (i = 0; i < rx_count; i++) {
239 enqueue_rx_packet(client, pkts[i]);
241 if (++client == num_clients)
245 for (i = 0; i < num_clients; i++)
250 * Function called by the main lcore of the DPDK process.
253 do_packet_forwarding(void)
255 unsigned port_num = 0; /* indexes the port[] array */
258 struct rte_mbuf *buf[PACKET_READ_SIZE];
262 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \
263 buf, PACKET_READ_SIZE);
264 ports->rx_stats.rx[port_num] += rx_count;
266 /* Now process the NIC packets read */
267 if (likely(rx_count > 0))
268 process_packets(port_num, buf, rx_count);
270 /* move to next port */
271 if (++port_num == ports->num_ports)
277 signal_handler(int signal)
281 if (signal == SIGINT)
282 RTE_ETH_FOREACH_DEV(port_id) {
283 rte_eth_dev_stop(port_id);
284 rte_eth_dev_close(port_id);
290 main(int argc, char *argv[])
292 signal(SIGINT, signal_handler);
293 /* initialise the system */
294 if (init(argc, argv) < 0 )
296 RTE_LOG(INFO, APP, "Finished Process Init.\n");
298 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0]));
300 /* clear statistics */
303 /* put all other cores to sleep except main */
304 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MAIN);
306 do_packet_forwarding();