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 char err_address[] = "00:00:00:00:00:00";
63 static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)];
66 if (unlikely(port >= RTE_MAX_ETHPORTS))
68 if (unlikely(addresses[port][0]=='\0')){
69 struct rte_ether_addr mac;
70 ret = rte_eth_macaddr_get(port, &mac);
72 printf("Failed to get MAC address (port %u): %s\n",
73 port, rte_strerror(-ret));
76 snprintf(addresses[port], sizeof(addresses[port]),
77 "%02x:%02x:%02x:%02x:%02x:%02x\n",
78 mac.addr_bytes[0], mac.addr_bytes[1], mac.addr_bytes[2],
79 mac.addr_bytes[3], mac.addr_bytes[4], mac.addr_bytes[5]);
81 return addresses[port];
85 * This function displays the recorded statistics for each port
86 * and for each client. It uses ANSI terminal codes to clear
87 * screen when called. It is called from a single non-master
88 * thread in the server process, when the process is run with more
89 * than one lcore enabled.
92 do_stats_display(void)
95 const char clr[] = { 27, '[', '2', 'J', '\0' };
96 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
97 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS];
98 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS];
100 /* to get TX stats, we need to do some summing calculations */
101 memset(port_tx, 0, sizeof(port_tx));
102 memset(port_tx_drop, 0, sizeof(port_tx_drop));
103 memset(client_tx, 0, sizeof(client_tx));
104 memset(client_tx_drop, 0, sizeof(client_tx_drop));
106 for (i = 0; i < num_clients; i++){
107 const volatile struct tx_stats *tx = &ports->tx_stats[i];
108 for (j = 0; j < ports->num_ports; j++){
109 /* assign to local variables here, save re-reading volatile vars */
110 const uint64_t tx_val = tx->tx[ports->id[j]];
111 const uint64_t drop_val = tx->tx_drop[ports->id[j]];
112 port_tx[j] += tx_val;
113 port_tx_drop[j] += drop_val;
114 client_tx[i] += tx_val;
115 client_tx_drop[i] += drop_val;
119 /* Clear screen and move to top left */
120 printf("%s%s", clr, topLeft);
124 for (i = 0; i < ports->num_ports; i++)
125 printf("Port %u: '%s'\t", (unsigned)ports->id[i],
126 get_printable_mac_addr(ports->id[i]));
128 for (i = 0; i < ports->num_ports; i++){
129 printf("Port %u - rx: %9"PRIu64"\t"
131 (unsigned)ports->id[i], ports->rx_stats.rx[i],
135 printf("\nCLIENTS\n");
137 for (i = 0; i < num_clients; i++){
138 const unsigned long long rx = clients[i].stats.rx;
139 const unsigned long long rx_drop = clients[i].stats.rx_drop;
140 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n"
141 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n",
142 i, rx, rx_drop, client_tx[i], client_tx_drop[i]);
149 * The function called from each non-master lcore used by the process.
150 * The test_and_set function is used to randomly pick a single lcore on which
151 * the code to display the statistics will run. Otherwise, the code just
155 sleep_lcore(__rte_unused void *dummy)
157 /* Used to pick a display thread - static, so zero-initialised */
158 static rte_atomic32_t display_stats;
160 /* Only one core should display stats */
161 if (rte_atomic32_test_and_set(&display_stats)) {
162 const unsigned sleeptime = 1;
163 printf("Core %u displaying statistics\n", rte_lcore_id());
165 /* Longer initial pause so above printf is seen */
166 sleep(sleeptime * 3);
168 /* Loop forever: sleep always returns 0 or <= param */
169 while (sleep(sleeptime) <= sleeptime)
176 * Function to set all the client statistic values to zero.
177 * Called at program startup.
184 for (i = 0; i < num_clients; i++)
185 clients[i].stats.rx = clients[i].stats.rx_drop = 0;
189 * send a burst of traffic to a client, assuming there are packets
190 * available to be sent to this client
193 flush_rx_queue(uint16_t client)
198 if (cl_rx_buf[client].count == 0)
201 cl = &clients[client];
202 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer,
203 cl_rx_buf[client].count, NULL) == 0){
204 for (j = 0; j < cl_rx_buf[client].count; j++)
205 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]);
206 cl->stats.rx_drop += cl_rx_buf[client].count;
209 cl->stats.rx += cl_rx_buf[client].count;
211 cl_rx_buf[client].count = 0;
215 * marks a packet down to be sent to a particular client process
218 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf)
220 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf;
224 * This function takes a group of packets and routes them
225 * individually to the client process. Very simply round-robins the packets
226 * without checking any of the packet contents.
229 process_packets(uint32_t port_num __rte_unused,
230 struct rte_mbuf *pkts[], uint16_t rx_count)
235 for (i = 0; i < rx_count; i++) {
236 enqueue_rx_packet(client, pkts[i]);
238 if (++client == num_clients)
242 for (i = 0; i < num_clients; i++)
247 * Function called by the master lcore of the DPDK process.
250 do_packet_forwarding(void)
252 unsigned port_num = 0; /* indexes the port[] array */
255 struct rte_mbuf *buf[PACKET_READ_SIZE];
259 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \
260 buf, PACKET_READ_SIZE);
261 ports->rx_stats.rx[port_num] += rx_count;
263 /* Now process the NIC packets read */
264 if (likely(rx_count > 0))
265 process_packets(port_num, buf, rx_count);
267 /* move to next port */
268 if (++port_num == ports->num_ports)
274 signal_handler(int signal)
278 if (signal == SIGINT)
279 RTE_ETH_FOREACH_DEV(port_id) {
280 rte_eth_dev_stop(port_id);
281 rte_eth_dev_close(port_id);
287 main(int argc, char *argv[])
289 signal(SIGINT, signal_handler);
290 /* initialise the system */
291 if (init(argc, argv) < 0 )
293 RTE_LOG(INFO, APP, "Finished Process Init.\n");
295 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0]));
297 /* clear statistics */
300 /* put all other cores to sleep bar master */
301 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MASTER);
303 do_packet_forwarding();