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42 #include <sys/queue.h>
44 #include <netinet/ip.h>
46 #include <rte_common.h>
47 #include <rte_memory.h>
48 #include <rte_memzone.h>
49 #include <rte_tailq.h>
51 #include <rte_byteorder.h>
52 #include <rte_launch.h>
53 #include <rte_per_lcore.h>
54 #include <rte_lcore.h>
55 #include <rte_branch_prediction.h>
56 #include <rte_atomic.h>
59 #include <rte_debug.h>
60 #include <rte_mempool.h>
61 #include <rte_memcpy.h>
63 #include <rte_ether.h>
64 #include <rte_interrupts.h>
66 #include <rte_ethdev.h>
67 #include <rte_byteorder.h>
68 #include <rte_malloc.h>
69 #include <rte_fbk_hash.h>
70 #include <rte_string_fns.h>
77 * When doing reads from the NIC or the client queues,
80 #define PACKET_READ_SIZE 32
83 * Local buffers to put packets in, used to send packets in bursts to the
86 struct client_rx_buf {
87 struct rte_mbuf *buffer[PACKET_READ_SIZE];
91 /* One buffer per client rx queue - dynamically allocate array */
92 static struct client_rx_buf *cl_rx_buf;
95 get_printable_mac_addr(uint8_t port)
97 static const char err_address[] = "00:00:00:00:00:00";
98 static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)];
100 if (unlikely(port >= RTE_MAX_ETHPORTS))
102 if (unlikely(addresses[port][0]=='\0')){
103 struct ether_addr mac;
104 rte_eth_macaddr_get(port, &mac);
105 snprintf(addresses[port], sizeof(addresses[port]),
106 "%02x:%02x:%02x:%02x:%02x:%02x\n",
107 mac.addr_bytes[0], mac.addr_bytes[1], mac.addr_bytes[2],
108 mac.addr_bytes[3], mac.addr_bytes[4], mac.addr_bytes[5]);
110 return addresses[port];
114 * This function displays the recorded statistics for each port
115 * and for each client. It uses ANSI terminal codes to clear
116 * screen when called. It is called from a single non-master
117 * thread in the server process, when the process is run with more
118 * than one lcore enabled.
121 do_stats_display(void)
124 const char clr[] = { 27, '[', '2', 'J', '\0' };
125 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
126 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS];
127 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS];
129 /* to get TX stats, we need to do some summing calculations */
130 memset(port_tx, 0, sizeof(port_tx));
131 memset(port_tx_drop, 0, sizeof(port_tx_drop));
132 memset(client_tx, 0, sizeof(client_tx));
133 memset(client_tx_drop, 0, sizeof(client_tx_drop));
135 for (i = 0; i < num_clients; i++){
136 const volatile struct tx_stats *tx = &ports->tx_stats[i];
137 for (j = 0; j < ports->num_ports; j++){
138 /* assign to local variables here, save re-reading volatile vars */
139 const uint64_t tx_val = tx->tx[ports->id[j]];
140 const uint64_t drop_val = tx->tx_drop[ports->id[j]];
141 port_tx[j] += tx_val;
142 port_tx_drop[j] += drop_val;
143 client_tx[i] += tx_val;
144 client_tx_drop[i] += drop_val;
148 /* Clear screen and move to top left */
149 printf("%s%s", clr, topLeft);
153 for (i = 0; i < ports->num_ports; i++)
154 printf("Port %u: '%s'\t", (unsigned)ports->id[i],
155 get_printable_mac_addr(ports->id[i]));
157 for (i = 0; i < ports->num_ports; i++){
158 printf("Port %u - rx: %9"PRIu64"\t"
160 (unsigned)ports->id[i], ports->rx_stats.rx[i],
164 printf("\nCLIENTS\n");
166 for (i = 0; i < num_clients; i++){
167 const unsigned long long rx = clients[i].stats.rx;
168 const unsigned long long rx_drop = clients[i].stats.rx_drop;
169 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n"
170 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n",
171 i, rx, rx_drop, client_tx[i], client_tx_drop[i]);
178 * The function called from each non-master lcore used by the process.
179 * The test_and_set function is used to randomly pick a single lcore on which
180 * the code to display the statistics will run. Otherwise, the code just
184 sleep_lcore(__attribute__((unused)) void *dummy)
186 /* Used to pick a display thread - static, so zero-initialised */
187 static rte_atomic32_t display_stats;
189 /* Only one core should display stats */
190 if (rte_atomic32_test_and_set(&display_stats)) {
191 const unsigned sleeptime = 1;
192 printf("Core %u displaying statistics\n", rte_lcore_id());
194 /* Longer initial pause so above printf is seen */
195 sleep(sleeptime * 3);
197 /* Loop forever: sleep always returns 0 or <= param */
198 while (sleep(sleeptime) <= sleeptime)
205 * Function to set all the client statistic values to zero.
206 * Called at program startup.
213 for (i = 0; i < num_clients; i++)
214 clients[i].stats.rx = clients[i].stats.rx_drop = 0;
218 * send a burst of traffic to a client, assuming there are packets
219 * available to be sent to this client
222 flush_rx_queue(uint16_t client)
227 if (cl_rx_buf[client].count == 0)
230 cl = &clients[client];
231 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer,
232 cl_rx_buf[client].count) != 0){
233 for (j = 0; j < cl_rx_buf[client].count; j++)
234 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]);
235 cl->stats.rx_drop += cl_rx_buf[client].count;
238 cl->stats.rx += cl_rx_buf[client].count;
240 cl_rx_buf[client].count = 0;
244 * marks a packet down to be sent to a particular client process
247 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf)
249 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf;
253 * This function takes a group of packets and routes them
254 * individually to the client process. Very simply round-robins the packets
255 * without checking any of the packet contents.
258 process_packets(uint32_t port_num __rte_unused,
259 struct rte_mbuf *pkts[], uint16_t rx_count)
264 for (i = 0; i < rx_count; i++) {
265 enqueue_rx_packet(client, pkts[i]);
267 if (++client == num_clients)
271 for (i = 0; i < num_clients; i++)
276 * Function called by the master lcore of the DPDK process.
279 do_packet_forwarding(void)
281 unsigned port_num = 0; /* indexes the port[] array */
284 struct rte_mbuf *buf[PACKET_READ_SIZE];
288 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \
289 buf, PACKET_READ_SIZE);
290 ports->rx_stats.rx[port_num] += rx_count;
292 /* Now process the NIC packets read */
293 if (likely(rx_count > 0))
294 process_packets(port_num, buf, rx_count);
296 /* move to next port */
297 if (++port_num == ports->num_ports)
303 main(int argc, char *argv[])
305 /* initialise the system */
306 if (init(argc, argv) < 0 )
308 RTE_LOG(INFO, APP, "Finished Process Init.\n");
310 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0]));
312 /* clear statistics */
315 /* put all other cores to sleep bar master */
316 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MASTER);
318 do_packet_forwarding();