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dpdk/examples/server_node_efd/server/main.c

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+/* 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;
+}