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dpdk/examples/server_node_efd/server/Makefile

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2016-2020 Intel Corporation
+
+# binary name
+APP = server
+
+# all source are stored in SRCS-y
+SRCS-y := main.c init.c args.c
+
+CFLAGS += -I../shared
+
+PKGCONF ?= pkg-config
+
+# Build using pkg-config variables if possible
+ifneq ($(shell $(PKGCONF) --exists libdpdk && echo 0),0)
+$(error "no installation of DPDK found")
+endif
+
+all: shared
+.PHONY: shared static
+shared: build/$(APP)-shared
+	ln -sf $(APP)-shared build/$(APP)
+static: build/$(APP)-static
+	ln -sf $(APP)-static build/$(APP)
+
+PC_FILE := $(shell $(PKGCONF) --path libdpdk 2>/dev/null)
+CFLAGS += -O3 $(shell $(PKGCONF) --cflags libdpdk)
+LDFLAGS_SHARED = $(shell $(PKGCONF) --libs libdpdk)
+LDFLAGS_STATIC = $(shell $(PKGCONF) --static --libs libdpdk)
+
+ifeq ($(MAKECMDGOALS),static)
+# check for broken pkg-config
+ifeq ($(shell echo $(LDFLAGS_STATIC) | grep 'whole-archive.*l:lib.*no-whole-archive'),)
+$(warning "pkg-config output list does not contain drivers between 'whole-archive'/'no-whole-archive' flags.")
+$(error "Cannot generate statically-linked binaries with this version of pkg-config")
+endif
+endif
+
+CFLAGS += -DALLOW_EXPERIMENTAL_API
+
+build/$(APP)-shared: $(SRCS-y) Makefile $(PC_FILE) | build
+	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_SHARED)
+
+build/$(APP)-static: $(SRCS-y) Makefile $(PC_FILE) | build
+	$(CC) $(CFLAGS) $(SRCS-y) -o $@ $(LDFLAGS) $(LDFLAGS_STATIC)
+
+build:
+	@mkdir -p $@
+
+.PHONY: clean
+clean:
+	rm -f build/$(APP) build/$(APP)-static build/$(APP)-shared
+	test -d build && rmdir -p build || true

dpdk/examples/server_node_efd/server/args.c

@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2017 Intel Corporation
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include <rte_memory.h>
+#include <rte_string_fns.h>
+
+#include "common.h"
+#include "args.h"
+#include "init.h"
+
+/* 1M flows by default */
+#define DEFAULT_NUM_FLOWS    0x100000
+
+/* global var for number of nodes - extern in header */
+uint8_t num_nodes;
+/* global var for number of flows - extern in header */
+uint32_t num_flows = DEFAULT_NUM_FLOWS;
+
+static const char *progname;
+
+/**
+ * Prints out usage information to stdout
+ */
+static void
+usage(void)
+{
+	printf("%s [EAL options] -- -p PORTMASK -n NUM_NODES -f NUM_FLOWS\n"
+		" -p PORTMASK: hexadecimal bitmask of ports to use\n"
+		" -n NUM_NODES: number of node processes to use\n"
+		" -f NUM_FLOWS: number of flows to be added in the EFD table\n",
+		progname);
+}
+
+/**
+ * The ports to be used by the application are passed in
+ * the form of a bitmask. This function parses the bitmask
+ * and places the port numbers to be used into the port[]
+ * array variable
+ */
+static int
+parse_portmask(uint8_t max_ports, const char *portmask)
+{
+	char *end = NULL;
+	unsigned long pm;
+	uint8_t count = 0;
+
+	if (portmask == NULL || *portmask == '\0')
+		return -1;
+
+	/* convert parameter to a number and verify */
+	pm = strtoul(portmask, &end, 16);
+	if (end == NULL || *end != '\0' || pm == 0)
+		return -1;
+
+	/* loop through bits of the mask and mark ports */
+	while (pm != 0) {
+		if (pm & 0x01) { /* bit is set in mask, use port */
+			if (count >= max_ports)
+				printf("WARNING: requested port %u not present"
+				" - ignoring\n", (unsigned int)count);
+			else
+			    info->id[info->num_ports++] = count;
+		}
+		pm = (pm >> 1);
+		count++;
+	}
+
+	return 0;
+}
+
+/**
+ * Take the number of nodes parameter passed to the app
+ * and convert to a number to store in the num_nodes variable
+ */
+static int
+parse_num_nodes(const char *nodes)
+{
+	char *end = NULL;
+	unsigned long temp;
+
+	if (nodes == NULL || *nodes == '\0')
+		return -1;
+
+	temp = strtoul(nodes, &end, 10);
+	if (end == NULL || *end != '\0' || temp == 0)
+		return -1;
+
+	num_nodes = (uint8_t)temp;
+	return 0;
+}
+
+static int
+parse_num_flows(const char *flows)
+{
+	char *end = NULL;
+
+	/* parse hexadecimal string */
+	num_flows = strtoul(flows, &end, 16);
+	if ((flows[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (num_flows == 0)
+		return -1;
+
+	return 0;
+}
+
+/**
+ * The application specific arguments follow the DPDK-specific
+ * arguments which are stripped by the DPDK init. This function
+ * processes these application arguments, printing usage info
+ * on error.
+ */
+int
+parse_app_args(uint8_t max_ports, int argc, char *argv[])
+{
+	int option_index, opt;
+	char **argvopt = argv;
+	static struct option lgopts[] = { /* no long options */
+		{NULL, 0, 0, 0 }
+	};
+	progname = argv[0];
+
+	while ((opt = getopt_long(argc, argvopt, "n:f:p:", lgopts,
+			&option_index)) != EOF) {
+		switch (opt) {
+		case 'p':
+			if (parse_portmask(max_ports, optarg) != 0) {
+				usage();
+				return -1;
+			}
+			break;
+		case 'n':
+			if (parse_num_nodes(optarg) != 0) {
+				usage();
+				return -1;
+			}
+			break;
+		case 'f':
+			if (parse_num_flows(optarg) != 0) {
+				usage();
+				return -1;
+			}
+			break;
+		default:
+			printf("ERROR: Unknown option '%c'\n", opt);
+			usage();
+			return -1;
+		}
+	}
+
+	if (info->num_ports == 0 || num_nodes == 0) {
+		usage();
+		return -1;
+	}
+
+	if (info->num_ports % 2 != 0) {
+		printf("ERROR: application requires an even "
+				"number of ports to use\n");
+		return -1;
+	}
+	return 0;
+}

dpdk/examples/server_node_efd/server/args.h

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2017 Intel Corporation
+ */
+
+#ifndef _ARGS_H_
+#define _ARGS_H_
+
+int parse_app_args(uint8_t max_ports, int argc, char *argv[]);
+
+#endif /* ifndef _ARGS_H_ */

dpdk/examples/server_node_efd/server/init.c

@@ -0,0 +1,368 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2017 Intel Corporation
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <inttypes.h>
+
+#include <rte_common.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_eal.h>
+#include <rte_byteorder.h>
+#include <rte_launch.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_debug.h>
+#include <rte_ring.h>
+#include <rte_log.h>
+#include <rte_mempool.h>
+#include <rte_memcpy.h>
+#include <rte_mbuf.h>
+#include <rte_interrupts.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_string_fns.h>
+#include <rte_cycles.h>
+#include <rte_efd.h>
+#include <rte_hash.h>
+
+#include "common.h"
+#include "args.h"
+#include "init.h"
+
+#define MBUFS_PER_NODE 1536
+#define MBUFS_PER_PORT 1536
+#define MBUF_CACHE_SIZE 512
+
+#define RTE_MP_RX_DESC_DEFAULT 512
+#define RTE_MP_TX_DESC_DEFAULT 512
+#define NODE_QUEUE_RINGSIZE 128
+
+#define NO_FLAGS 0
+
+/* The mbuf pool for packet rx */
+struct rte_mempool *pktmbuf_pool;
+
+/* array of info/queues for nodes */
+struct node *nodes;
+
+/* EFD table */
+struct rte_efd_table *efd_table;
+
+/* Shared info between server and nodes */
+struct shared_info *info;
+
+/**
+ * Initialise the mbuf pool for packet reception for the NIC, and any other
+ * buffer pools needed by the app - currently none.
+ */
+static int
+init_mbuf_pools(void)
+{
+	const unsigned int num_mbufs = (num_nodes * MBUFS_PER_NODE) +
+			(info->num_ports * MBUFS_PER_PORT);
+
+	/*
+	 * Don't pass single-producer/single-consumer flags to mbuf create as it
+	 * seems faster to use a cache instead
+	 */
+	printf("Creating mbuf pool '%s' [%u mbufs] ...\n",
+			PKTMBUF_POOL_NAME, num_mbufs);
+	pktmbuf_pool = rte_pktmbuf_pool_create(PKTMBUF_POOL_NAME, num_mbufs,
+		MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
+
+	return pktmbuf_pool == NULL; /* 0  on success */
+}
+
+/**
+ * Initialise an individual port:
+ * - configure number of rx and tx rings
+ * - set up each rx ring, to pull from the main mbuf pool
+ * - set up each tx ring
+ * - start the port and report its status to stdout
+ */
+static int
+init_port(uint16_t port_num)
+{
+	/* for port configuration all features are off by default */
+	struct rte_eth_conf port_conf = {
+		.rxmode = {
+			.mq_mode = RTE_ETH_MQ_RX_RSS,
+		},
+	};
+	const uint16_t rx_rings = 1, tx_rings = num_nodes;
+	uint16_t rx_ring_size = RTE_MP_RX_DESC_DEFAULT;
+	uint16_t tx_ring_size = RTE_MP_TX_DESC_DEFAULT;
+	struct rte_eth_dev_info dev_info;
+	struct rte_eth_txconf txconf;
+
+	uint16_t q;
+	int retval;
+
+	printf("Port %u init ... ", port_num);
+	fflush(stdout);
+
+	retval = rte_eth_dev_info_get(port_num, &dev_info);
+	if (retval != 0)
+		return retval;
+
+	if (dev_info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE)
+		port_conf.txmode.offloads |=
+			RTE_ETH_TX_OFFLOAD_MBUF_FAST_FREE;
+
+	/*
+	 * Standard DPDK port initialisation - config port, then set up
+	 * rx and tx rings.
+	 */
+	retval = rte_eth_dev_configure(port_num, rx_rings, tx_rings, &port_conf);
+	if (retval != 0)
+		return retval;
+
+	retval = rte_eth_dev_adjust_nb_rx_tx_desc(port_num, &rx_ring_size,
+			&tx_ring_size);
+	if (retval != 0)
+		return retval;
+
+	for (q = 0; q < rx_rings; q++) {
+		retval = rte_eth_rx_queue_setup(port_num, q, rx_ring_size,
+				rte_eth_dev_socket_id(port_num),
+				NULL, pktmbuf_pool);
+		if (retval < 0)
+			return retval;
+	}
+
+	txconf = dev_info.default_txconf;
+	txconf.offloads = port_conf.txmode.offloads;
+	for (q = 0; q < tx_rings; q++) {
+		retval = rte_eth_tx_queue_setup(port_num, q, tx_ring_size,
+				rte_eth_dev_socket_id(port_num),
+				&txconf);
+		if (retval < 0)
+			return retval;
+	}
+
+	retval = rte_eth_promiscuous_enable(port_num);
+	if (retval != 0)
+		return retval;
+
+	retval = rte_eth_dev_start(port_num);
+	if (retval < 0)
+		return retval;
+
+	printf("done:\n");
+
+	return 0;
+}
+
+/**
+ * Set up the DPDK rings which will be used to pass packets, via
+ * pointers, between the multi-process server and node processes.
+ * Each node needs one RX queue.
+ */
+static int
+init_shm_rings(void)
+{
+	unsigned int i;
+	unsigned int socket_id;
+	const char *q_name;
+	const unsigned int ringsize = NODE_QUEUE_RINGSIZE;
+
+	nodes = rte_malloc("node details",
+		sizeof(*nodes) * num_nodes, 0);
+	if (nodes == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot allocate memory for "
+				"node program details\n");
+
+	for (i = 0; i < num_nodes; i++) {
+		/* Create an RX queue for each node */
+		socket_id = rte_socket_id();
+		q_name = get_rx_queue_name(i);
+		nodes[i].rx_q = rte_ring_create(q_name,
+				ringsize, socket_id,
+				RING_F_SP_ENQ | RING_F_SC_DEQ);
+		if (nodes[i].rx_q == NULL)
+			rte_exit(EXIT_FAILURE, "Cannot create rx ring queue "
+					"for node %u\n", i);
+	}
+	return 0;
+}
+
+/*
+ * Create EFD table which will contain all the flows
+ * that will be distributed among the nodes
+ */
+
+/* Create EFD table. 8< */
+static void
+create_efd_table(void)
+{
+	uint8_t socket_id = rte_socket_id();
+
+	/* create table */
+	efd_table = rte_efd_create("flow table", num_flows * 2, sizeof(uint32_t),
+			1 << socket_id,	socket_id);
+
+	if (efd_table == NULL)
+		rte_exit(EXIT_FAILURE, "Problem creating the flow table\n");
+}
+
+static void
+populate_efd_table(void)
+{
+	unsigned int i;
+	int32_t ret;
+	uint32_t ip_dst;
+	uint8_t socket_id = rte_socket_id();
+	uint64_t node_id;
+
+	/* Add flows in table */
+	for (i = 0; i < num_flows; i++) {
+		node_id = i % num_nodes;
+
+		ip_dst = rte_cpu_to_be_32(i);
+		ret = rte_efd_update(efd_table, socket_id,
+				(void *)&ip_dst, (efd_value_t)node_id);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Unable to add entry %u in "
+					"EFD table\n", i);
+	}
+
+	printf("EFD table: Adding 0x%x keys\n", num_flows);
+}
+/* >8 End of creation EFD table. */
+
+/* Check the link status of all ports in up to 9s, and print them finally */
+static void
+check_all_ports_link_status(uint16_t port_num, uint32_t port_mask)
+{
+#define CHECK_INTERVAL 100 /* 100ms */
+#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
+	uint8_t count, all_ports_up, print_flag = 0;
+	uint16_t portid;
+	struct rte_eth_link link;
+	int ret;
+	char link_status_text[RTE_ETH_LINK_MAX_STR_LEN];
+
+	printf("\nChecking link status");
+	fflush(stdout);
+	for (count = 0; count <= MAX_CHECK_TIME; count++) {
+		all_ports_up = 1;
+		for (portid = 0; portid < port_num; portid++) {
+			if ((port_mask & (1 << info->id[portid])) == 0)
+				continue;
+			memset(&link, 0, sizeof(link));
+			ret = rte_eth_link_get_nowait(info->id[portid], &link);
+			if (ret < 0) {
+				all_ports_up = 0;
+				if (print_flag == 1)
+					printf("Port %u link get failed: %s\n",
+						portid, rte_strerror(-ret));
+				continue;
+			}
+			/* print link status if flag set */
+			if (print_flag == 1) {
+				rte_eth_link_to_str(link_status_text,
+					sizeof(link_status_text), &link);
+				printf("Port %d %s\n", info->id[portid],
+				       link_status_text);
+				continue;
+			}
+			/* clear all_ports_up flag if any link down */
+			if (link.link_status == RTE_ETH_LINK_DOWN) {
+				all_ports_up = 0;
+				break;
+			}
+		}
+		/* after finally printing all link status, get out */
+		if (print_flag == 1)
+			break;
+
+		if (all_ports_up == 0) {
+			printf(".");
+			fflush(stdout);
+			rte_delay_ms(CHECK_INTERVAL);
+		}
+
+		/* set the print_flag if all ports up or timeout */
+		if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
+			print_flag = 1;
+			printf("done\n");
+		}
+	}
+}
+
+/**
+ * Main init function for the multi-process server app,
+ * calls subfunctions to do each stage of the initialisation.
+ */
+int
+init(int argc, char *argv[])
+{
+	int retval;
+	const struct rte_memzone *mz;
+	uint8_t i, total_ports;
+
+	/* init EAL, parsing EAL args */
+	retval = rte_eal_init(argc, argv);
+	if (retval < 0)
+		return -1;
+	argc -= retval;
+	argv += retval;
+
+	/* get total number of ports */
+	total_ports = rte_eth_dev_count_avail();
+
+	/* set up array for port data */
+	mz = rte_memzone_reserve(MZ_SHARED_INFO, sizeof(*info),
+				rte_socket_id(), NO_FLAGS);
+	if (mz == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot reserve memory zone "
+				"for port information\n");
+	memset(mz->addr, 0, sizeof(*info));
+	info = mz->addr;
+
+	/* parse additional, application arguments */
+	retval = parse_app_args(total_ports, argc, argv);
+	if (retval != 0)
+		return -1;
+
+	/* initialise mbuf pools */
+	retval = init_mbuf_pools();
+	if (retval != 0)
+		rte_exit(EXIT_FAILURE, "Cannot create needed mbuf pools\n");
+
+	/* now initialise the ports we will use */
+	for (i = 0; i < info->num_ports; i++) {
+		retval = init_port(info->id[i]);
+		if (retval != 0)
+			rte_exit(EXIT_FAILURE, "Cannot initialise port %u\n",
+					(unsigned int) i);
+	}
+
+	check_all_ports_link_status(info->num_ports, (~0x0));
+
+	/* initialise the node queues/rings for inter-eu comms */
+	init_shm_rings();
+
+	/* Create the EFD table */
+	create_efd_table();
+
+	/* Populate the EFD table */
+	populate_efd_table();
+
+	/* Share the total number of nodes */
+	info->num_nodes = num_nodes;
+
+	/* Share the total number of flows */
+	info->num_flows = num_flows;
+	return 0;
+}

dpdk/examples/server_node_efd/server/init.h

@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2017 Intel Corporation
+ */
+
+#ifndef _INIT_H_
+#define _INIT_H_
+
+/*
+ * #include <rte_ring.h>
+ * #include "args.h"
+ */
+
+/*
+ * Define a node structure with all needed info, including
+ * stats from the nodes.
+ */
+struct node {
+	struct rte_ring *rx_q;
+	unsigned int node_id;
+	/* these stats hold how many packets the node will actually receive,
+	 * and how many packets were dropped because the node's queue was full.
+	 * The port-info stats, in contrast, record how many packets were received
+	 * or transmitted on an actual NIC port.
+	 */
+	struct {
+		uint64_t rx;
+		uint64_t rx_drop;
+	} stats;
+};
+
+extern struct rte_efd_table *efd_table;
+extern struct node *nodes;
+
+/*
+ * shared information between server and nodes: number of nodes,
+ * port numbers, rx and tx stats etc.
+ */
+extern struct shared_info *info;
+
+extern struct rte_mempool *pktmbuf_pool;
+extern uint8_t num_nodes;
+extern unsigned int num_sockets;
+extern uint32_t num_flows;
+
+int init(int argc, char *argv[]);
+
+#endif /* ifndef _INIT_H_ */

dpdk/examples/server_node_efd/server/main.c

@@ -0,0 +1,350 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016-2017 Intel Corporation
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <inttypes.h>
+#include <sys/queue.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+
+#include <rte_common.h>
+#include <rte_memory.h>
+#include <rte_eal.h>
+#include <rte_launch.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_ring.h>
+#include <rte_log.h>
+#include <rte_debug.h>
+#include <rte_mempool.h>
+#include <rte_memcpy.h>
+#include <rte_mbuf.h>
+#include <rte_ether.h>
+#include <rte_interrupts.h>
+#include <rte_ethdev.h>
+#include <rte_byteorder.h>
+#include <rte_malloc.h>
+#include <rte_string_fns.h>
+#include <rte_efd.h>
+#include <rte_ip.h>
+
+#include "common.h"
+#include "args.h"
+#include "init.h"
+
+/*
+ * When doing reads from the NIC or the node queues,
+ * use this batch size
+ */
+#define PACKET_READ_SIZE 32
+
+/*
+ * Local buffers to put packets in, used to send packets in bursts to the
+ * nodes
+ */
+struct node_rx_buf {
+	struct rte_mbuf *buffer[PACKET_READ_SIZE];
+	uint16_t count;
+};
+
+struct efd_stats {
+	uint64_t distributed;
+	uint64_t drop;
+} flow_dist_stats;
+
+/* One buffer per node rx queue - dynamically allocate array */
+static struct node_rx_buf *cl_rx_buf;
+
+static const char *
+get_printable_mac_addr(uint16_t port)
+{
+	static const char err_address[] = "00:00:00:00:00:00";
+	static char addresses[RTE_MAX_ETHPORTS][sizeof(err_address)];
+	struct rte_ether_addr mac;
+	int ret;
+
+	if (unlikely(port >= RTE_MAX_ETHPORTS))
+		return err_address;
+	if (unlikely(addresses[port][0] == '\0')) {
+		ret = rte_eth_macaddr_get(port, &mac);
+		if (ret != 0) {
+			printf("Failed to get MAC address (port %u): %s\n",
+			       port, rte_strerror(-ret));
+			return err_address;
+		}
+
+		snprintf(addresses[port], sizeof(addresses[port]),
+				RTE_ETHER_ADDR_PRT_FMT "\n",
+				RTE_ETHER_ADDR_BYTES(&mac));
+	}
+	return addresses[port];
+}
+
+/*
+ * This function displays the recorded statistics for each port
+ * and for each node. It uses ANSI terminal codes to clear
+ * screen when called. It is called from a single worker
+ * thread in the server process, when the process is run with more
+ * than one lcore enabled.
+ */
+
+/* Display recorded statistics. 8< */
+static void
+do_stats_display(void)
+{
+	unsigned int i, j;
+	const char clr[] = {27, '[', '2', 'J', '\0'};
+	const char topLeft[] = {27, '[', '1', ';', '1', 'H', '\0'};
+	uint64_t port_tx[RTE_MAX_ETHPORTS], port_tx_drop[RTE_MAX_ETHPORTS];
+	uint64_t node_tx[MAX_NODES], node_tx_drop[MAX_NODES];
+
+	/* to get TX stats, we need to do some summing calculations */
+	memset(port_tx, 0, sizeof(port_tx));
+	memset(port_tx_drop, 0, sizeof(port_tx_drop));
+	memset(node_tx, 0, sizeof(node_tx));
+	memset(node_tx_drop, 0, sizeof(node_tx_drop));
+
+	for (i = 0; i < num_nodes; i++) {
+		const struct tx_stats *tx = &info->tx_stats[i];
+
+		for (j = 0; j < info->num_ports; j++) {
+			const uint64_t tx_val = tx->tx[info->id[j]];
+			const uint64_t drop_val = tx->tx_drop[info->id[j]];
+
+			port_tx[j] += tx_val;
+			port_tx_drop[j] += drop_val;
+			node_tx[i] += tx_val;
+			node_tx_drop[i] += drop_val;
+		}
+	}
+
+	/* Clear screen and move to top left */
+	printf("%s%s", clr, topLeft);
+
+	printf("PORTS\n");
+	printf("-----\n");
+	for (i = 0; i < info->num_ports; i++)
+		printf("Port %u: '%s'\t", (unsigned int)info->id[i],
+				get_printable_mac_addr(info->id[i]));
+	printf("\n\n");
+	for (i = 0; i < info->num_ports; i++) {
+		printf("Port %u - rx: %9"PRIu64"\t"
+				"tx: %9"PRIu64"\n",
+				(unsigned int)info->id[i], info->rx_stats.rx[i],
+				port_tx[i]);
+	}
+
+	printf("\nSERVER\n");
+	printf("-----\n");
+	printf("distributed: %9"PRIu64", drop: %9"PRIu64"\n",
+			flow_dist_stats.distributed, flow_dist_stats.drop);
+
+	printf("\nNODES\n");
+	printf("-------\n");
+	for (i = 0; i < num_nodes; i++) {
+		const unsigned long long rx = nodes[i].stats.rx;
+		const unsigned long long rx_drop = nodes[i].stats.rx_drop;
+		const struct filter_stats *filter = &info->filter_stats[i];
+
+		printf("Node %2u - rx: %9llu, rx_drop: %9llu\n"
+				"            tx: %9"PRIu64", tx_drop: %9"PRIu64"\n"
+				"            filter_passed: %9"PRIu64", "
+				"filter_drop: %9"PRIu64"\n",
+				i, rx, rx_drop, node_tx[i], node_tx_drop[i],
+				filter->passed, filter->drop);
+	}
+
+	printf("\n");
+}
+/* >8 End of displaying the recorded statistics. */
+
+/*
+ * The function called from each non-main lcore used by the process.
+ * The test_and_set function is used to randomly pick a single lcore on which
+ * the code to display the statistics will run. Otherwise, the code just
+ * repeatedly sleeps.
+ */
+static int
+sleep_lcore(__rte_unused void *dummy)
+{
+	/* Used to pick a display thread - static, so zero-initialised */
+	static uint32_t display_stats;
+
+	/* Only one core should display stats */
+	uint32_t display_init = 0;
+	if (__atomic_compare_exchange_n(&display_stats, &display_init, 1, 0,
+			__ATOMIC_RELAXED, __ATOMIC_RELAXED)) {
+		const unsigned int sleeptime = 1;
+
+		printf("Core %u displaying statistics\n", rte_lcore_id());
+
+		/* Longer initial pause so above printf is seen */
+		sleep(sleeptime * 3);
+
+		/* Loop forever: sleep always returns 0 or <= param */
+		while (sleep(sleeptime) <= sleeptime)
+			do_stats_display();
+	}
+	return 0;
+}
+
+/*
+ * Function to set all the node statistic values to zero.
+ * Called at program startup.
+ */
+static void
+clear_stats(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < num_nodes; i++)
+		nodes[i].stats.rx = nodes[i].stats.rx_drop = 0;
+}
+
+/*
+ * send a burst of traffic to a node, assuming there are packets
+ * available to be sent to this node
+ */
+
+/* Flush rx queue. 8< */
+static void
+flush_rx_queue(uint16_t node)
+{
+	uint16_t j;
+	struct node *cl;
+
+	if (cl_rx_buf[node].count == 0)
+		return;
+
+	cl = &nodes[node];
+	if (rte_ring_enqueue_bulk(cl->rx_q, (void **)cl_rx_buf[node].buffer,
+			cl_rx_buf[node].count, NULL) != cl_rx_buf[node].count){
+		for (j = 0; j < cl_rx_buf[node].count; j++)
+			rte_pktmbuf_free(cl_rx_buf[node].buffer[j]);
+		cl->stats.rx_drop += cl_rx_buf[node].count;
+	} else
+		cl->stats.rx += cl_rx_buf[node].count;
+
+	cl_rx_buf[node].count = 0;
+}
+/* >8 End of sending a burst of traffic to a node. */
+
+/*
+ * marks a packet down to be sent to a particular node process
+ */
+static inline void
+enqueue_rx_packet(uint8_t node, struct rte_mbuf *buf)
+{
+	cl_rx_buf[node].buffer[cl_rx_buf[node].count++] = buf;
+}
+
+/*
+ * This function takes a group of packets and routes them
+ * individually to the node process. Very simply round-robins the packets
+ * without checking any of the packet contents. 8<
+ */
+
+/* Processing packets. 8< */
+static void
+process_packets(uint32_t port_num __rte_unused, struct rte_mbuf *pkts[],
+		uint16_t rx_count, unsigned int socket_id)
+{
+	uint16_t i;
+	uint8_t node;
+	efd_value_t data[RTE_EFD_BURST_MAX];
+	const void *key_ptrs[RTE_EFD_BURST_MAX];
+
+	struct rte_ipv4_hdr *ipv4_hdr;
+	uint32_t ipv4_dst_ip[RTE_EFD_BURST_MAX];
+
+	for (i = 0; i < rx_count; i++) {
+		/* Handle IPv4 header.*/
+		ipv4_hdr = rte_pktmbuf_mtod_offset(pkts[i],
+			struct rte_ipv4_hdr *, sizeof(struct rte_ether_hdr));
+		ipv4_dst_ip[i] = ipv4_hdr->dst_addr;
+		key_ptrs[i] = (void *)&ipv4_dst_ip[i];
+	}
+
+	rte_efd_lookup_bulk(efd_table, socket_id, rx_count,
+				(const void **) key_ptrs, data);
+	for (i = 0; i < rx_count; i++) {
+		node = (uint8_t) ((uintptr_t)data[i]);
+
+		if (node >= num_nodes) {
+			/*
+			 * Node is out of range, which means that
+			 * flow has not been inserted
+			 */
+			flow_dist_stats.drop++;
+			rte_pktmbuf_free(pkts[i]);
+		} else {
+			flow_dist_stats.distributed++;
+			enqueue_rx_packet(node, pkts[i]);
+		}
+	}
+
+	for (i = 0; i < num_nodes; i++)
+		flush_rx_queue(i);
+}
+/* >8 End of process_packets. */
+
+/*
+ * Function called by the main lcore of the DPDK process.
+ */
+static void
+do_packet_forwarding(void)
+{
+	unsigned int port_num = 0; /* indexes the port[] array */
+	unsigned int socket_id = rte_socket_id();
+
+	for (;;) {
+		struct rte_mbuf *buf[PACKET_READ_SIZE];
+		uint16_t rx_count;
+
+		/* read a port */
+		rx_count = rte_eth_rx_burst(info->id[port_num], 0,
+				buf, PACKET_READ_SIZE);
+		info->rx_stats.rx[port_num] += rx_count;
+
+		/* Now process the NIC packets read */
+		if (likely(rx_count > 0))
+			process_packets(port_num, buf, rx_count, socket_id);
+
+		/* move to next port */
+		if (++port_num == info->num_ports)
+			port_num = 0;
+	}
+}
+
+int
+main(int argc, char *argv[])
+{
+	/* initialise the system */
+	if (init(argc, argv) < 0)
+		return -1;
+	RTE_LOG(INFO, APP, "Finished Process Init.\n");
+
+	cl_rx_buf = calloc(num_nodes, sizeof(cl_rx_buf[0]));
+
+	/* clear statistics */
+	clear_stats();
+
+	/* put all other cores to sleep except main */
+	rte_eal_mp_remote_launch(sleep_lcore, NULL, SKIP_MAIN);
+
+	do_packet_forwarding();
+
+	/* clean up the EAL */
+	rte_eal_cleanup();
+
+	return 0;
+}

dpdk/examples/server_node_efd/server/meson.build

@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2019 Intel Corporation
+
+# meson file, for building this example as part of a main DPDK build.
+#
+# To build this example as a standalone application with an already-installed
+# DPDK instance, use 'make'
+
+name = 'efd_server'
+
+allow_experimental_apis = true
+deps += 'efd'
+sources += files('args.c', 'init.c', 'main.c')
+includes += include_directories('../shared')