--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <inttypes.h>
+#include <unistd.h>
+#include <signal.h>
+#include <getopt.h>
+
+#include <rte_eal.h>
+#include <rte_ethdev.h>
+#include <rte_cycles.h>
+#include <rte_malloc.h>
+#include <rte_debug.h>
+#include <rte_prefetch.h>
+#include <rte_distributor.h>
+
+#define RX_RING_SIZE 256
+#define TX_RING_SIZE 512
+#define NUM_MBUFS ((64*1024)-1)
+#define MBUF_CACHE_SIZE 250
+#define BURST_SIZE 32
+#define RTE_RING_SZ 1024
+
+/* uncommnet below line to enable debug logs */
+/* #define DEBUG */
+
+#ifdef DEBUG
+#define LOG_LEVEL RTE_LOG_DEBUG
+#define LOG_DEBUG(log_type, fmt, args...) do { \
+ RTE_LOG(DEBUG, log_type, fmt, ##args); \
+} while (0)
+#else
+#define LOG_LEVEL RTE_LOG_INFO
+#define LOG_DEBUG(log_type, fmt, args...) do {} while (0)
+#endif
+
+#define RTE_LOGTYPE_DISTRAPP RTE_LOGTYPE_USER1
+
+/* mask of enabled ports */
+static uint32_t enabled_port_mask;
+volatile uint8_t quit_signal;
+volatile uint8_t quit_signal_rx;
+
+static volatile struct app_stats {
+ struct {
+ uint64_t rx_pkts;
+ uint64_t returned_pkts;
+ uint64_t enqueued_pkts;
+ } rx __rte_cache_aligned;
+
+ struct {
+ uint64_t dequeue_pkts;
+ uint64_t tx_pkts;
+ } tx __rte_cache_aligned;
+} app_stats;
+
+static const struct rte_eth_conf port_conf_default = {
+ .rxmode = {
+ .mq_mode = ETH_MQ_RX_RSS,
+ .max_rx_pkt_len = ETHER_MAX_LEN,
+ },
+ .txmode = {
+ .mq_mode = ETH_MQ_TX_NONE,
+ },
+ .rx_adv_conf = {
+ .rss_conf = {
+ .rss_hf = ETH_RSS_IP | ETH_RSS_UDP |
+ ETH_RSS_TCP | ETH_RSS_SCTP,
+ }
+ },
+};
+
+struct output_buffer {
+ unsigned count;
+ struct rte_mbuf *mbufs[BURST_SIZE];
+};
+
+/*
+ * Initialises a given port using global settings and with the rx buffers
+ * coming from the mbuf_pool passed as parameter
+ */
+static inline int
+port_init(uint8_t port, struct rte_mempool *mbuf_pool)
+{
+ struct rte_eth_conf port_conf = port_conf_default;
+ const uint16_t rxRings = 1, txRings = rte_lcore_count() - 1;
+ int retval;
+ uint16_t q;
+
+ if (port >= rte_eth_dev_count())
+ return -1;
+
+ retval = rte_eth_dev_configure(port, rxRings, txRings, &port_conf);
+ if (retval != 0)
+ return retval;
+
+ for (q = 0; q < rxRings; q++) {
+ retval = rte_eth_rx_queue_setup(port, q, RX_RING_SIZE,
+ rte_eth_dev_socket_id(port),
+ NULL, mbuf_pool);
+ if (retval < 0)
+ return retval;
+ }
+
+ for (q = 0; q < txRings; q++) {
+ retval = rte_eth_tx_queue_setup(port, q, TX_RING_SIZE,
+ rte_eth_dev_socket_id(port),
+ NULL);
+ if (retval < 0)
+ return retval;
+ }
+
+ retval = rte_eth_dev_start(port);
+ if (retval < 0)
+ return retval;
+
+ struct rte_eth_link link;
+ rte_eth_link_get_nowait(port, &link);
+ if (!link.link_status) {
+ sleep(1);
+ rte_eth_link_get_nowait(port, &link);
+ }
+
+ if (!link.link_status) {
+ printf("Link down on port %"PRIu8"\n", port);
+ return 0;
+ }
+
+ struct ether_addr addr;
+ rte_eth_macaddr_get(port, &addr);
+ printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
+ " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
+ (unsigned)port,
+ addr.addr_bytes[0], addr.addr_bytes[1],
+ addr.addr_bytes[2], addr.addr_bytes[3],
+ addr.addr_bytes[4], addr.addr_bytes[5]);
+
+ rte_eth_promiscuous_enable(port);
+
+ return 0;
+}
+
+struct lcore_params {
+ unsigned worker_id;
+ struct rte_distributor *d;
+ struct rte_ring *r;
+ struct rte_mempool *mem_pool;
+};
+
+static void
+quit_workers(struct rte_distributor *d, struct rte_mempool *p)
+{
+ const unsigned num_workers = rte_lcore_count() - 2;
+ unsigned i;
+ struct rte_mbuf *bufs[num_workers];
+ rte_mempool_get_bulk(p, (void *)bufs, num_workers);
+
+ for (i = 0; i < num_workers; i++)
+ bufs[i]->hash.rss = i << 1;
+
+ rte_distributor_process(d, bufs, num_workers);
+ rte_mempool_put_bulk(p, (void *)bufs, num_workers);
+}
+
+static int
+lcore_rx(struct lcore_params *p)
+{
+ struct rte_distributor *d = p->d;
+ struct rte_mempool *mem_pool = p->mem_pool;
+ struct rte_ring *r = p->r;
+ const uint8_t nb_ports = rte_eth_dev_count();
+ const int socket_id = rte_socket_id();
+ uint8_t port;
+
+ for (port = 0; port < nb_ports; port++) {
+ /* skip ports that are not enabled */
+ if ((enabled_port_mask & (1 << port)) == 0)
+ continue;
+
+ if (rte_eth_dev_socket_id(port) > 0 &&
+ rte_eth_dev_socket_id(port) != socket_id)
+ printf("WARNING, port %u is on remote NUMA node to "
+ "RX thread.\n\tPerformance will not "
+ "be optimal.\n", port);
+ }
+
+ printf("\nCore %u doing packet RX.\n", rte_lcore_id());
+ port = 0;
+ while (!quit_signal_rx) {
+
+ /* skip ports that are not enabled */
+ if ((enabled_port_mask & (1 << port)) == 0) {
+ if (++port == nb_ports)
+ port = 0;
+ continue;
+ }
+ struct rte_mbuf *bufs[BURST_SIZE*2];
+ const uint16_t nb_rx = rte_eth_rx_burst(port, 0, bufs,
+ BURST_SIZE);
+ app_stats.rx.rx_pkts += nb_rx;
+
+ rte_distributor_process(d, bufs, nb_rx);
+ const uint16_t nb_ret = rte_distributor_returned_pkts(d,
+ bufs, BURST_SIZE*2);
+ app_stats.rx.returned_pkts += nb_ret;
+ if (unlikely(nb_ret == 0))
+ continue;
+
+ uint16_t sent = rte_ring_enqueue_burst(r, (void *)bufs, nb_ret);
+ app_stats.rx.enqueued_pkts += sent;
+ if (unlikely(sent < nb_ret)) {
+ LOG_DEBUG(DISTRAPP, "%s:Packet loss due to full ring\n", __func__);
+ while (sent < nb_ret)
+ rte_pktmbuf_free(bufs[sent++]);
+ }
+ if (++port == nb_ports)
+ port = 0;
+ }
+ rte_distributor_process(d, NULL, 0);
+ /* flush distributor to bring to known state */
+ rte_distributor_flush(d);
+ /* set worker & tx threads quit flag */
+ quit_signal = 1;
+ /*
+ * worker threads may hang in get packet as
+ * distributor process is not running, just make sure workers
+ * get packets till quit_signal is actually been
+ * received and they gracefully shutdown
+ */
+ quit_workers(d, mem_pool);
+ /* rx thread should quit at last */
+ return 0;
+}
+
+static inline void
+flush_one_port(struct output_buffer *outbuf, uint8_t outp)
+{
+ unsigned nb_tx = rte_eth_tx_burst(outp, 0, outbuf->mbufs,
+ outbuf->count);
+ app_stats.tx.tx_pkts += nb_tx;
+
+ if (unlikely(nb_tx < outbuf->count)) {
+ LOG_DEBUG(DISTRAPP, "%s:Packet loss with tx_burst\n", __func__);
+ do {
+ rte_pktmbuf_free(outbuf->mbufs[nb_tx]);
+ } while (++nb_tx < outbuf->count);
+ }
+ outbuf->count = 0;
+}
+
+static inline void
+flush_all_ports(struct output_buffer *tx_buffers, uint8_t nb_ports)
+{
+ uint8_t outp;
+ for (outp = 0; outp < nb_ports; outp++) {
+ /* skip ports that are not enabled */
+ if ((enabled_port_mask & (1 << outp)) == 0)
+ continue;
+
+ if (tx_buffers[outp].count == 0)
+ continue;
+
+ flush_one_port(&tx_buffers[outp], outp);
+ }
+}
+
+static int
+lcore_tx(struct rte_ring *in_r)
+{
+ static struct output_buffer tx_buffers[RTE_MAX_ETHPORTS];
+ const uint8_t nb_ports = rte_eth_dev_count();
+ const int socket_id = rte_socket_id();
+ uint8_t port;
+
+ for (port = 0; port < nb_ports; port++) {
+ /* skip ports that are not enabled */
+ if ((enabled_port_mask & (1 << port)) == 0)
+ continue;
+
+ if (rte_eth_dev_socket_id(port) > 0 &&
+ rte_eth_dev_socket_id(port) != socket_id)
+ printf("WARNING, port %u is on remote NUMA node to "
+ "TX thread.\n\tPerformance will not "
+ "be optimal.\n", port);
+ }
+
+ printf("\nCore %u doing packet TX.\n", rte_lcore_id());
+ while (!quit_signal) {
+
+ for (port = 0; port < nb_ports; port++) {
+ /* skip ports that are not enabled */
+ if ((enabled_port_mask & (1 << port)) == 0)
+ continue;
+
+ struct rte_mbuf *bufs[BURST_SIZE];
+ const uint16_t nb_rx = rte_ring_dequeue_burst(in_r,
+ (void *)bufs, BURST_SIZE);
+ app_stats.tx.dequeue_pkts += nb_rx;
+
+ /* if we get no traffic, flush anything we have */
+ if (unlikely(nb_rx == 0)) {
+ flush_all_ports(tx_buffers, nb_ports);
+ continue;
+ }
+
+ /* for traffic we receive, queue it up for transmit */
+ uint16_t i;
+ rte_prefetch_non_temporal((void *)bufs[0]);
+ rte_prefetch_non_temporal((void *)bufs[1]);
+ rte_prefetch_non_temporal((void *)bufs[2]);
+ for (i = 0; i < nb_rx; i++) {
+ struct output_buffer *outbuf;
+ uint8_t outp;
+ rte_prefetch_non_temporal((void *)bufs[i + 3]);
+ /*
+ * workers should update in_port to hold the
+ * output port value
+ */
+ outp = bufs[i]->port;
+ /* skip ports that are not enabled */
+ if ((enabled_port_mask & (1 << outp)) == 0)
+ continue;
+
+ outbuf = &tx_buffers[outp];
+ outbuf->mbufs[outbuf->count++] = bufs[i];
+ if (outbuf->count == BURST_SIZE)
+ flush_one_port(outbuf, outp);
+ }
+ }
+ }
+ return 0;
+}
+
+static void
+int_handler(int sig_num)
+{
+ printf("Exiting on signal %d\n", sig_num);
+ /* set quit flag for rx thread to exit */
+ quit_signal_rx = 1;
+}
+
+static void
+print_stats(void)
+{
+ struct rte_eth_stats eth_stats;
+ unsigned i;
+
+ printf("\nRX thread stats:\n");
+ printf(" - Received: %"PRIu64"\n", app_stats.rx.rx_pkts);
+ printf(" - Processed: %"PRIu64"\n", app_stats.rx.returned_pkts);
+ printf(" - Enqueued: %"PRIu64"\n", app_stats.rx.enqueued_pkts);
+
+ printf("\nTX thread stats:\n");
+ printf(" - Dequeued: %"PRIu64"\n", app_stats.tx.dequeue_pkts);
+ printf(" - Transmitted: %"PRIu64"\n", app_stats.tx.tx_pkts);
+
+ for (i = 0; i < rte_eth_dev_count(); i++) {
+ rte_eth_stats_get(i, ð_stats);
+ printf("\nPort %u stats:\n", i);
+ printf(" - Pkts in: %"PRIu64"\n", eth_stats.ipackets);
+ printf(" - Pkts out: %"PRIu64"\n", eth_stats.opackets);
+ printf(" - In Errs: %"PRIu64"\n", eth_stats.ierrors);
+ printf(" - Out Errs: %"PRIu64"\n", eth_stats.oerrors);
+ printf(" - Mbuf Errs: %"PRIu64"\n", eth_stats.rx_nombuf);
+ }
+}
+
+static int
+lcore_worker(struct lcore_params *p)
+{
+ struct rte_distributor *d = p->d;
+ const unsigned id = p->worker_id;
+ /*
+ * for single port, xor_val will be zero so we won't modify the output
+ * port, otherwise we send traffic from 0 to 1, 2 to 3, and vice versa
+ */
+ const unsigned xor_val = (rte_eth_dev_count() > 1);
+ struct rte_mbuf *buf = NULL;
+
+ printf("\nCore %u acting as worker core.\n", rte_lcore_id());
+ while (!quit_signal) {
+ buf = rte_distributor_get_pkt(d, id, buf);
+ buf->port ^= xor_val;
+ }
+ return 0;
+}
+
+/* display usage */
+static void
+print_usage(const char *prgname)
+{
+ printf("%s [EAL options] -- -p PORTMASK\n"
+ " -p PORTMASK: hexadecimal bitmask of ports to configure\n",
+ prgname);
+}
+
+static int
+parse_portmask(const char *portmask)
+{
+ char *end = NULL;
+ unsigned long pm;
+
+ /* parse hexadecimal string */
+ pm = strtoul(portmask, &end, 16);
+ if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
+ return -1;
+
+ if (pm == 0)
+ return -1;
+
+ return pm;
+}
+
+/* Parse the argument given in the command line of the application */
+static int
+parse_args(int argc, char **argv)
+{
+ int opt;
+ char **argvopt;
+ int option_index;
+ char *prgname = argv[0];
+ static struct option lgopts[] = {
+ {NULL, 0, 0, 0}
+ };
+
+ argvopt = argv;
+
+ while ((opt = getopt_long(argc, argvopt, "p:",
+ lgopts, &option_index)) != EOF) {
+
+ switch (opt) {
+ /* portmask */
+ case 'p':
+ enabled_port_mask = parse_portmask(optarg);
+ if (enabled_port_mask == 0) {
+ printf("invalid portmask\n");
+ print_usage(prgname);
+ return -1;
+ }
+ break;
+
+ default:
+ print_usage(prgname);
+ return -1;
+ }
+ }
+
+ if (optind <= 1) {
+ print_usage(prgname);
+ return -1;
+ }
+
+ argv[optind-1] = prgname;
+
+ optind = 0; /* reset getopt lib */
+ return 0;
+}
+
+/* Main function, does initialization and calls the per-lcore functions */
+int
+main(int argc, char *argv[])
+{
+ struct rte_mempool *mbuf_pool;
+ struct rte_distributor *d;
+ struct rte_ring *output_ring;
+ unsigned lcore_id, worker_id = 0;
+ unsigned nb_ports;
+ uint8_t portid;
+ uint8_t nb_ports_available;
+
+ /* catch ctrl-c so we can print on exit */
+ signal(SIGINT, int_handler);
+
+ /* init EAL */
+ int ret = rte_eal_init(argc, argv);
+ if (ret < 0)
+ rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
+ argc -= ret;
+ argv += ret;
+
+ /* parse application arguments (after the EAL ones) */
+ ret = parse_args(argc, argv);
+ if (ret < 0)
+ rte_exit(EXIT_FAILURE, "Invalid distributor parameters\n");
+
+ if (rte_lcore_count() < 3)
+ rte_exit(EXIT_FAILURE, "Error, This application needs at "
+ "least 3 logical cores to run:\n"
+ "1 lcore for packet RX and distribution\n"
+ "1 lcore for packet TX\n"
+ "and at least 1 lcore for worker threads\n");
+
+ nb_ports = rte_eth_dev_count();
+ if (nb_ports == 0)
+ rte_exit(EXIT_FAILURE, "Error: no ethernet ports detected\n");
+ if (nb_ports != 1 && (nb_ports & 1))
+ rte_exit(EXIT_FAILURE, "Error: number of ports must be even, except "
+ "when using a single port\n");
+
+ mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
+ NUM_MBUFS * nb_ports, MBUF_CACHE_SIZE, 0,
+ RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
+ if (mbuf_pool == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
+ nb_ports_available = nb_ports;
+
+ /* initialize all ports */
+ for (portid = 0; portid < nb_ports; portid++) {
+ /* skip ports that are not enabled */
+ if ((enabled_port_mask & (1 << portid)) == 0) {
+ printf("\nSkipping disabled port %d\n", portid);
+ nb_ports_available--;
+ continue;
+ }
+ /* init port */
+ printf("Initializing port %u... done\n", (unsigned) portid);
+
+ if (port_init(portid, mbuf_pool) != 0)
+ rte_exit(EXIT_FAILURE, "Cannot initialize port %"PRIu8"\n",
+ portid);
+ }
+
+ if (!nb_ports_available) {
+ rte_exit(EXIT_FAILURE,
+ "All available ports are disabled. Please set portmask.\n");
+ }
+
+ d = rte_distributor_create("PKT_DIST", rte_socket_id(),
+ rte_lcore_count() - 2);
+ if (d == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot create distributor\n");
+
+ /*
+ * scheduler ring is read only by the transmitter core, but written to
+ * by multiple threads
+ */
+ output_ring = rte_ring_create("Output_ring", RTE_RING_SZ,
+ rte_socket_id(), RING_F_SC_DEQ);
+ if (output_ring == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot create output ring\n");
+
+ RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+ if (worker_id == rte_lcore_count() - 2)
+ rte_eal_remote_launch((lcore_function_t *)lcore_tx,
+ output_ring, lcore_id);
+ else {
+ struct lcore_params *p =
+ rte_malloc(NULL, sizeof(*p), 0);
+ if (!p)
+ rte_panic("malloc failure\n");
+ *p = (struct lcore_params){worker_id, d, output_ring, mbuf_pool};
+
+ rte_eal_remote_launch((lcore_function_t *)lcore_worker,
+ p, lcore_id);
+ }
+ worker_id++;
+ }
+ /* call lcore_main on master core only */
+ struct lcore_params p = { 0, d, output_ring, mbuf_pool};
+ lcore_rx(&p);
+
+ RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+ if (rte_eal_wait_lcore(lcore_id) < 0)
+ return -1;
+ }
+
+ print_stats();
+ return 0;
+}
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