1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
12 #include <sys/queue.h>
14 #include <netinet/ip.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)];
65 if (unlikely(port >= RTE_MAX_ETHPORTS))
67 if (unlikely(addresses[port][0]=='\0')){
68 struct ether_addr mac;
69 rte_eth_macaddr_get(port, &mac);
70 snprintf(addresses[port], sizeof(addresses[port]),
71 "%02x:%02x:%02x:%02x:%02x:%02x\n",
72 mac.addr_bytes[0], mac.addr_bytes[1], mac.addr_bytes[2],
73 mac.addr_bytes[3], mac.addr_bytes[4], mac.addr_bytes[5]);
75 return addresses[port];
79 * This function displays the recorded statistics for each port
80 * and for each client. It uses ANSI terminal codes to clear
81 * screen when called. It is called from a single non-master
82 * thread in the server process, when the process is run with more
83 * than one lcore enabled.
86 do_stats_display(void)
89 const char clr[] = { 27, '[', '2', 'J', '\0' };
90 const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
91 uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS];
92 uint64_t client_tx[MAX_CLIENTS], client_tx_drop[MAX_CLIENTS];
94 /* to get TX stats, we need to do some summing calculations */
95 memset(port_tx, 0, sizeof(port_tx));
96 memset(port_tx_drop, 0, sizeof(port_tx_drop));
97 memset(client_tx, 0, sizeof(client_tx));
98 memset(client_tx_drop, 0, sizeof(client_tx_drop));
100 for (i = 0; i < num_clients; i++){
101 const volatile struct tx_stats *tx = &ports->tx_stats[i];
102 for (j = 0; j < ports->num_ports; j++){
103 /* assign to local variables here, save re-reading volatile vars */
104 const uint64_t tx_val = tx->tx[ports->id[j]];
105 const uint64_t drop_val = tx->tx_drop[ports->id[j]];
106 port_tx[j] += tx_val;
107 port_tx_drop[j] += drop_val;
108 client_tx[i] += tx_val;
109 client_tx_drop[i] += drop_val;
113 /* Clear screen and move to top left */
114 printf("%s%s", clr, topLeft);
118 for (i = 0; i < ports->num_ports; i++)
119 printf("Port %u: '%s'\t", (unsigned)ports->id[i],
120 get_printable_mac_addr(ports->id[i]));
122 for (i = 0; i < ports->num_ports; i++){
123 printf("Port %u - rx: %9"PRIu64"\t"
125 (unsigned)ports->id[i], ports->rx_stats.rx[i],
129 printf("\nCLIENTS\n");
131 for (i = 0; i < num_clients; i++){
132 const unsigned long long rx = clients[i].stats.rx;
133 const unsigned long long rx_drop = clients[i].stats.rx_drop;
134 printf("Client %2u - rx: %9llu, rx_drop: %9llu\n"
135 " tx: %9"PRIu64", tx_drop: %9"PRIu64"\n",
136 i, rx, rx_drop, client_tx[i], client_tx_drop[i]);
143 * The function called from each non-master lcore used by the process.
144 * The test_and_set function is used to randomly pick a single lcore on which
145 * the code to display the statistics will run. Otherwise, the code just
149 sleep_lcore(__attribute__((unused)) void *dummy)
151 /* Used to pick a display thread - static, so zero-initialised */
152 static rte_atomic32_t display_stats;
154 /* Only one core should display stats */
155 if (rte_atomic32_test_and_set(&display_stats)) {
156 const unsigned sleeptime = 1;
157 printf("Core %u displaying statistics\n", rte_lcore_id());
159 /* Longer initial pause so above printf is seen */
160 sleep(sleeptime * 3);
162 /* Loop forever: sleep always returns 0 or <= param */
163 while (sleep(sleeptime) <= sleeptime)
170 * Function to set all the client statistic values to zero.
171 * Called at program startup.
178 for (i = 0; i < num_clients; i++)
179 clients[i].stats.rx = clients[i].stats.rx_drop = 0;
183 * send a burst of traffic to a client, assuming there are packets
184 * available to be sent to this client
187 flush_rx_queue(uint16_t client)
192 if (cl_rx_buf[client].count == 0)
195 cl = &clients[client];
196 if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[client].buffer,
197 cl_rx_buf[client].count, NULL) == 0){
198 for (j = 0; j < cl_rx_buf[client].count; j++)
199 rte_pktmbuf_free(cl_rx_buf[client].buffer[j]);
200 cl->stats.rx_drop += cl_rx_buf[client].count;
203 cl->stats.rx += cl_rx_buf[client].count;
205 cl_rx_buf[client].count = 0;
209 * marks a packet down to be sent to a particular client process
212 enqueue_rx_packet(uint8_t client, struct rte_mbuf *buf)
214 cl_rx_buf[client].buffer[cl_rx_buf[client].count++] = buf;
218 * This function takes a group of packets and routes them
219 * individually to the client process. Very simply round-robins the packets
220 * without checking any of the packet contents.
223 process_packets(uint32_t port_num __rte_unused,
224 struct rte_mbuf *pkts[], uint16_t rx_count)
229 for (i = 0; i < rx_count; i++) {
230 enqueue_rx_packet(client, pkts[i]);
232 if (++client == num_clients)
236 for (i = 0; i < num_clients; i++)
241 * Function called by the master lcore of the DPDK process.
244 do_packet_forwarding(void)
246 unsigned port_num = 0; /* indexes the port[] array */
249 struct rte_mbuf *buf[PACKET_READ_SIZE];
253 rx_count = rte_eth_rx_burst(ports->id[port_num], 0, \
254 buf, PACKET_READ_SIZE);
255 ports->rx_stats.rx[port_num] += rx_count;
257 /* Now process the NIC packets read */
258 if (likely(rx_count > 0))
259 process_packets(port_num, buf, rx_count);
261 /* move to next port */
262 if (++port_num == ports->num_ports)
268 main(int argc, char *argv[])
270 /* initialise the system */
271 if (init(argc, argv) < 0 )
273 RTE_LOG(INFO, APP, "Finished Process Init.\n");
275 cl_rx_buf = calloc(num_clients, sizeof(cl_rx_buf[0]));
277 /* clear statistics */
280 /* put all other cores to sleep bar master */
281 rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MASTER);
283 do_packet_forwarding();