Example(Load_balancer) Tx Flush Bug(This bug DPDK each version)

[Maple <liujian@raisecom.com>]

From 94f2eaed51e6e5402e8c03b80e0999a4fd420390 Mon Sep 17 00:00:00 2001
From: root <root@liujian@raisecom.com>
To: <dev@dpdk.org>
Cc: <thomas.monjalon@6wind.com>, <lifei@raisecom.com>,<shizhan@raisecom.com>
Date: Wed, 21 Dec 2016 22:31:29 +0800
Subject: [PATCH] load_balancer Tx Flush Bug

We found a bug in use load_balancer example,and,This bug DPDK each version.
In IO tx flush, only flush port 0.
So,If I enable more than the Port,then,In addition to 0 port won't flush.

Signed-off-by: root <root@liujian@raisecom.com>
---
 a/examples/load_balancer/runtime.c | 667 ++++++++++++++++++++++++++++++++++++
 b/examples/load_balancer/runtime.c | 669 +++++++++++++++++++++++++++++++++++++
 2 files changed, 1336 insertions(+)
 create mode 100644 a/examples/load_balancer/runtime.c
 create mode 100644 b/examples/load_balancer/runtime.c

diff --git a/a/examples/load_balancer/runtime.c b/a/examples/load_balancer/runtime.c
new file mode 100644
index 0000000..9612392
--- /dev/null
+++ b/a/examples/load_balancer/runtime.c
@@ -0,0 +1,667 @@
+/*-
+ *   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 <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <getopt.h>
+
+#include <rte_common.h>
+#include <rte_byteorder.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memcpy.h>
+#include <rte_memzone.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_prefetch.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_random.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_ring.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_ip.h>
+#include <rte_tcp.h>
+#include <rte_lpm.h>
+
+#include "main.h"
+
+#ifndef APP_LCORE_IO_FLUSH
+#define APP_LCORE_IO_FLUSH           1000000
+#endif
+
+#ifndef APP_LCORE_WORKER_FLUSH
+#define APP_LCORE_WORKER_FLUSH       1000000
+#endif
+
+#ifndef APP_STATS
+#define APP_STATS                    1000000
+#endif
+
+#define APP_IO_RX_DROP_ALL_PACKETS   0
+#define APP_WORKER_DROP_ALL_PACKETS  0
+#define APP_IO_TX_DROP_ALL_PACKETS   0
+
+#ifndef APP_IO_RX_PREFETCH_ENABLE
+#define APP_IO_RX_PREFETCH_ENABLE    1
+#endif
+
+#ifndef APP_WORKER_PREFETCH_ENABLE
+#define APP_WORKER_PREFETCH_ENABLE   1
+#endif
+
+#ifndef APP_IO_TX_PREFETCH_ENABLE
+#define APP_IO_TX_PREFETCH_ENABLE    1
+#endif
+
+#if APP_IO_RX_PREFETCH_ENABLE
+#define APP_IO_RX_PREFETCH0(p)       rte_prefetch0(p)
+#define APP_IO_RX_PREFETCH1(p)       rte_prefetch1(p)
+#else
+#define APP_IO_RX_PREFETCH0(p)
+#define APP_IO_RX_PREFETCH1(p)
+#endif
+
+#if APP_WORKER_PREFETCH_ENABLE
+#define APP_WORKER_PREFETCH0(p)      rte_prefetch0(p)
+#define APP_WORKER_PREFETCH1(p)      rte_prefetch1(p)
+#else
+#define APP_WORKER_PREFETCH0(p)
+#define APP_WORKER_PREFETCH1(p)
+#endif
+
+#if APP_IO_TX_PREFETCH_ENABLE
+#define APP_IO_TX_PREFETCH0(p)       rte_prefetch0(p)
+#define APP_IO_TX_PREFETCH1(p)       rte_prefetch1(p)
+#else
+#define APP_IO_TX_PREFETCH0(p)
+#define APP_IO_TX_PREFETCH1(p)
+#endif
+
+static inline void
+app_lcore_io_rx_buffer_to_send (
+ struct app_lcore_params_io *lp,
+ uint32_t worker,
+ struct rte_mbuf *mbuf,
+ uint32_t bsz)
+{
+ uint32_t pos;
+ int ret;
+
+ pos = lp->rx.mbuf_out[worker].n_mbufs;
+ lp->rx.mbuf_out[worker].array[pos ++] = mbuf;
+ if (likely(pos < bsz)) {
+ lp->rx.mbuf_out[worker].n_mbufs = pos;
+ return;
+ }
+
+ ret = rte_ring_sp_enqueue_bulk(
+ lp->rx.rings[worker],
+ (void **) lp->rx.mbuf_out[worker].array,
+ bsz);
+
+ if (unlikely(ret == -ENOBUFS)) {
+ uint32_t k;
+ for (k = 0; k < bsz; k ++) {
+ struct rte_mbuf *m = lp->rx.mbuf_out[worker].array[k];
+ rte_pktmbuf_free(m);
+ }
+ }
+
+ lp->rx.mbuf_out[worker].n_mbufs = 0;
+ lp->rx.mbuf_out_flush[worker] = 0;
+
+#if APP_STATS
+ lp->rx.rings_iters[worker] ++;
+ if (likely(ret == 0)) {
+ lp->rx.rings_count[worker] ++;
+ }
+ if (unlikely(lp->rx.rings_iters[worker] == APP_STATS)) {
+ unsigned lcore = rte_lcore_id();
+
+ printf("\tI/O RX %u out (worker %u): enq success rate = %.2f\n",
+ lcore,
+ (unsigned)worker,
+ ((double) lp->rx.rings_count[worker]) / ((double) lp->rx.rings_iters[worker]));
+ lp->rx.rings_iters[worker] = 0;
+ lp->rx.rings_count[worker] = 0;
+ }
+#endif
+}
+
+static inline void
+app_lcore_io_rx(
+ struct app_lcore_params_io *lp,
+ uint32_t n_workers,
+ uint32_t bsz_rd,
+ uint32_t bsz_wr,
+ uint8_t pos_lb)
+{
+ struct rte_mbuf *mbuf_1_0, *mbuf_1_1, *mbuf_2_0, *mbuf_2_1;
+ uint8_t *data_1_0, *data_1_1 = NULL;
+ uint32_t i;
+
+ for (i = 0; i < lp->rx.n_nic_queues; i ++) {
+ uint8_t port = lp->rx.nic_queues[i].port;
+ uint8_t queue = lp->rx.nic_queues[i].queue;
+ uint32_t n_mbufs, j;
+
+ n_mbufs = rte_eth_rx_burst(
+ port,
+ queue,
+ lp->rx.mbuf_in.array,
+ (uint16_t) bsz_rd);
+
+ if (unlikely(n_mbufs == 0)) {
+ continue;
+ }
+
+#if APP_STATS
+ lp->rx.nic_queues_iters[i] ++;
+ lp->rx.nic_queues_count[i] += n_mbufs;
+ if (unlikely(lp->rx.nic_queues_iters[i] == APP_STATS)) {
+ struct rte_eth_stats stats;
+ unsigned lcore = rte_lcore_id();
+
+ rte_eth_stats_get(port, &stats);
+
+ printf("I/O RX %u in (NIC port %u): NIC drop ratio = %.2f avg burst size = %.2f\n",
+ lcore,
+ (unsigned) port,
+ (double) stats.imissed / (double) (stats.imissed + stats.ipackets),
+ ((double) lp->rx.nic_queues_count[i]) / ((double) lp->rx.nic_queues_iters[i]));
+ lp->rx.nic_queues_iters[i] = 0;
+ lp->rx.nic_queues_count[i] = 0;
+ }
+#endif
+
+#if APP_IO_RX_DROP_ALL_PACKETS
+ for (j = 0; j < n_mbufs; j ++) {
+ struct rte_mbuf *pkt = lp->rx.mbuf_in.array[j];
+ rte_pktmbuf_free(pkt);
+ }
+
+ continue;
+#endif
+
+ mbuf_1_0 = lp->rx.mbuf_in.array[0];
+ mbuf_1_1 = lp->rx.mbuf_in.array[1];
+ data_1_0 = rte_pktmbuf_mtod(mbuf_1_0, uint8_t *);
+ if (likely(n_mbufs > 1)) {
+ data_1_1 = rte_pktmbuf_mtod(mbuf_1_1, uint8_t *);
+ }
+
+ mbuf_2_0 = lp->rx.mbuf_in.array[2];
+ mbuf_2_1 = lp->rx.mbuf_in.array[3];
+ APP_IO_RX_PREFETCH0(mbuf_2_0);
+ APP_IO_RX_PREFETCH0(mbuf_2_1);
+
+ for (j = 0; j + 3 < n_mbufs; j += 2) {
+ struct rte_mbuf *mbuf_0_0, *mbuf_0_1;
+ uint8_t *data_0_0, *data_0_1;
+ uint32_t worker_0, worker_1;
+
+ mbuf_0_0 = mbuf_1_0;
+ mbuf_0_1 = mbuf_1_1;
+ data_0_0 = data_1_0;
+ data_0_1 = data_1_1;
+
+ mbuf_1_0 = mbuf_2_0;
+ mbuf_1_1 = mbuf_2_1;
+ data_1_0 = rte_pktmbuf_mtod(mbuf_2_0, uint8_t *);
+ data_1_1 = rte_pktmbuf_mtod(mbuf_2_1, uint8_t *);
+ APP_IO_RX_PREFETCH0(data_1_0);
+ APP_IO_RX_PREFETCH0(data_1_1);
+
+ mbuf_2_0 = lp->rx.mbuf_in.array[j+4];
+ mbuf_2_1 = lp->rx.mbuf_in.array[j+5];
+ APP_IO_RX_PREFETCH0(mbuf_2_0);
+ APP_IO_RX_PREFETCH0(mbuf_2_1);
+
+ worker_0 = data_0_0[pos_lb] & (n_workers - 1);
+ worker_1 = data_0_1[pos_lb] & (n_workers - 1);
+
+ app_lcore_io_rx_buffer_to_send(lp, worker_0, mbuf_0_0, bsz_wr);
+ app_lcore_io_rx_buffer_to_send(lp, worker_1, mbuf_0_1, bsz_wr);
+ }
+
+ /* Handle the last 1, 2 (when n_mbufs is even) or 3 (when n_mbufs is odd) packets  */
+ for ( ; j < n_mbufs; j += 1) {
+ struct rte_mbuf *mbuf;
+ uint8_t *data;
+ uint32_t worker;
+
+ mbuf = mbuf_1_0;
+ mbuf_1_0 = mbuf_1_1;
+ mbuf_1_1 = mbuf_2_0;
+ mbuf_2_0 = mbuf_2_1;
+
+ data = rte_pktmbuf_mtod(mbuf, uint8_t *);
+
+ APP_IO_RX_PREFETCH0(mbuf_1_0);
+
+ worker = data[pos_lb] & (n_workers - 1);
+
+ app_lcore_io_rx_buffer_to_send(lp, worker, mbuf, bsz_wr);
+ }
+ }
+}
+
+static inline void
+app_lcore_io_rx_flush(struct app_lcore_params_io *lp, uint32_t n_workers)
+{
+ uint32_t worker;
+
+ for (worker = 0; worker < n_workers; worker ++) {
+ int ret;
+
+ if (likely((lp->rx.mbuf_out_flush[worker] == 0) ||
+            (lp->rx.mbuf_out[worker].n_mbufs == 0))) {
+ lp->rx.mbuf_out_flush[worker] = 1;
+ continue;
+ }
+
+ ret = rte_ring_sp_enqueue_bulk(
+ lp->rx.rings[worker],
+ (void **) lp->rx.mbuf_out[worker].array,
+ lp->rx.mbuf_out[worker].n_mbufs);
+
+ if (unlikely(ret < 0)) {
+ uint32_t k;
+ for (k = 0; k < lp->rx.mbuf_out[worker].n_mbufs; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->rx.mbuf_out[worker].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+
+ lp->rx.mbuf_out[worker].n_mbufs = 0;
+ lp->rx.mbuf_out_flush[worker] = 1;
+ }
+}
+
+static inline void
+app_lcore_io_tx(
+ struct app_lcore_params_io *lp,
+ uint32_t n_workers,
+ uint32_t bsz_rd,
+ uint32_t bsz_wr)
+{
+ uint32_t worker;
+
+ for (worker = 0; worker < n_workers; worker ++) {
+ uint32_t i;
+
+ for (i = 0; i < lp->tx.n_nic_ports; i ++) {
+ uint8_t port = lp->tx.nic_ports[i];
+ struct rte_ring *ring = lp->tx.rings[port][worker];
+ uint32_t n_mbufs, n_pkts;
+ int ret;
+
+ n_mbufs = lp->tx.mbuf_out[port].n_mbufs;
+ ret = rte_ring_sc_dequeue_bulk(
+ ring,
+ (void **) &lp->tx.mbuf_out[port].array[n_mbufs],
+ bsz_rd);
+
+ if (unlikely(ret == -ENOENT)) {
+ continue;
+ }
+
+ n_mbufs += bsz_rd;
+
+#if APP_IO_TX_DROP_ALL_PACKETS
+ {
+ uint32_t j;
+ APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[0]);
+ APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[1]);
+
+ for (j = 0; j < n_mbufs; j ++) {
+ if (likely(j < n_mbufs - 2)) {
+ APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[j + 2]);
+ }
+
+ rte_pktmbuf_free(lp->tx.mbuf_out[port].array[j]);
+ }
+
+ lp->tx.mbuf_out[port].n_mbufs = 0;
+
+ continue;
+ }
+#endif
+
+ if (unlikely(n_mbufs < bsz_wr)) {
+ lp->tx.mbuf_out[port].n_mbufs = n_mbufs;
+ continue;
+ }
+
+ n_pkts = rte_eth_tx_burst(
+ port,
+ 0,
+ lp->tx.mbuf_out[port].array,
+ (uint16_t) n_mbufs);
+
+#if APP_STATS
+ lp->tx.nic_ports_iters[port] ++;
+ lp->tx.nic_ports_count[port] += n_pkts;
+ if (unlikely(lp->tx.nic_ports_iters[port] == APP_STATS)) {
+ unsigned lcore = rte_lcore_id();
+
+ printf("\t\t\tI/O TX %u out (port %u): avg burst size = %.2f\n",
+ lcore,
+ (unsigned) port,
+ ((double) lp->tx.nic_ports_count[port]) / ((double) lp->tx.nic_ports_iters[port]));
+ lp->tx.nic_ports_iters[port] = 0;
+ lp->tx.nic_ports_count[port] = 0;
+ }
+#endif
+
+ if (unlikely(n_pkts < n_mbufs)) {
+ uint32_t k;
+ for (k = n_pkts; k < n_mbufs; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->tx.mbuf_out[port].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+ lp->tx.mbuf_out[port].n_mbufs = 0;
+ lp->tx.mbuf_out_flush[port] = 0;
+ }
+ }
+}
+
+static inline void
+app_lcore_io_tx_flush(struct app_lcore_params_io *lp)
+{
+ uint8_t port;
+
+ for (port = 0; port < lp->tx.n_nic_ports; port ++) {
+ uint32_t n_pkts;
+
+ if (likely((lp->tx.mbuf_out_flush[port] == 0) ||
+            (lp->tx.mbuf_out[port].n_mbufs == 0))) {
+ lp->tx.mbuf_out_flush[port] = 1;
+ continue;
+ }
+
+ n_pkts = rte_eth_tx_burst(
+ port,
+ 0,
+ lp->tx.mbuf_out[port].array,
+ (uint16_t) lp->tx.mbuf_out[port].n_mbufs);
+
+ if (unlikely(n_pkts < lp->tx.mbuf_out[port].n_mbufs)) {
+ uint32_t k;
+ for (k = n_pkts; k < lp->tx.mbuf_out[port].n_mbufs; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->tx.mbuf_out[port].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+
+ lp->tx.mbuf_out[port].n_mbufs = 0;
+ lp->tx.mbuf_out_flush[port] = 1;
+ }
+}
+
+static void
+app_lcore_main_loop_io(void)
+{
+ uint32_t lcore = rte_lcore_id();
+ struct app_lcore_params_io *lp = &app.lcore_params[lcore].io;
+ uint32_t n_workers = app_get_lcores_worker();
+ uint64_t i = 0;
+
+ uint32_t bsz_rx_rd = app.burst_size_io_rx_read;
+ uint32_t bsz_rx_wr = app.burst_size_io_rx_write;
+ uint32_t bsz_tx_rd = app.burst_size_io_tx_read;
+ uint32_t bsz_tx_wr = app.burst_size_io_tx_write;
+
+ uint8_t pos_lb = app.pos_lb;
+
+ for ( ; ; ) {
+ if (APP_LCORE_IO_FLUSH && (unlikely(i == APP_LCORE_IO_FLUSH))) {
+ if (likely(lp->rx.n_nic_queues > 0)) {
+ app_lcore_io_rx_flush(lp, n_workers);
+ }
+
+ if (likely(lp->tx.n_nic_ports > 0)) {
+ app_lcore_io_tx_flush(lp);
+ }
+
+ i = 0;
+ }
+
+ if (likely(lp->rx.n_nic_queues > 0)) {
+ app_lcore_io_rx(lp, n_workers, bsz_rx_rd, bsz_rx_wr, pos_lb);
+ }
+
+ if (likely(lp->tx.n_nic_ports > 0)) {
+ app_lcore_io_tx(lp, n_workers, bsz_tx_rd, bsz_tx_wr);
+ }
+
+ i ++;
+ }
+}
+
+static inline void
+app_lcore_worker(
+ struct app_lcore_params_worker *lp,
+ uint32_t bsz_rd,
+ uint32_t bsz_wr)
+{
+ uint32_t i;
+
+ for (i = 0; i < lp->n_rings_in; i ++) {
+ struct rte_ring *ring_in = lp->rings_in[i];
+ uint32_t j;
+ int ret;
+
+ ret = rte_ring_sc_dequeue_bulk(
+ ring_in,
+ (void **) lp->mbuf_in.array,
+ bsz_rd);
+
+ if (unlikely(ret == -ENOENT)) {
+ continue;
+ }
+
+#if APP_WORKER_DROP_ALL_PACKETS
+ for (j = 0; j < bsz_rd; j ++) {
+ struct rte_mbuf *pkt = lp->mbuf_in.array[j];
+ rte_pktmbuf_free(pkt);
+ }
+
+ continue;
+#endif
+
+ APP_WORKER_PREFETCH1(rte_pktmbuf_mtod(lp->mbuf_in.array[0], unsigned char *));
+ APP_WORKER_PREFETCH0(lp->mbuf_in.array[1]);
+
+ for (j = 0; j < bsz_rd; j ++) {
+ struct rte_mbuf *pkt;
+ struct ipv4_hdr *ipv4_hdr;
+ uint32_t ipv4_dst, pos;
+ uint8_t port;
+
+ if (likely(j < bsz_rd - 1)) {
+ APP_WORKER_PREFETCH1(rte_pktmbuf_mtod(lp->mbuf_in.array[j+1], unsigned char *));
+ }
+ if (likely(j < bsz_rd - 2)) {
+ APP_WORKER_PREFETCH0(lp->mbuf_in.array[j+2]);
+ }
+
+ pkt = lp->mbuf_in.array[j];
+ ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, unsigned char *) + sizeof(struct ether_hdr));
+ ipv4_dst = rte_be_to_cpu_32(ipv4_hdr->dst_addr);
+
+ if (unlikely(rte_lpm_lookup(lp->lpm_table, ipv4_dst, &port) != 0)) {
+ port = pkt->pkt.in_port;
+ }
+
+ pos = lp->mbuf_out[port].n_mbufs;
+
+ lp->mbuf_out[port].array[pos ++] = pkt;
+ if (likely(pos < bsz_wr)) {
+ lp->mbuf_out[port].n_mbufs = pos;
+ continue;
+ }
+
+ ret = rte_ring_sp_enqueue_bulk(
+ lp->rings_out[port],
+ (void **) lp->mbuf_out[port].array,
+ bsz_wr);
+
+#if APP_STATS
+ lp->rings_out_iters[port] ++;
+ if (ret == 0) {
+ lp->rings_out_count[port] += 1;
+ }
+ if (lp->rings_out_iters[port] == APP_STATS){
+ printf("\t\tWorker %u out (NIC port %u): enq success rate = %.2f\n",
+ (unsigned) lp->worker_id,
+ (unsigned) port,
+ ((double) lp->rings_out_count[port]) / ((double) lp->rings_out_iters[port]));
+ lp->rings_out_iters[port] = 0;
+ lp->rings_out_count[port] = 0;
+ }
+#endif
+
+ if (unlikely(ret == -ENOBUFS)) {
+ uint32_t k;
+ for (k = 0; k < bsz_wr; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->mbuf_out[port].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+
+ lp->mbuf_out[port].n_mbufs = 0;
+ lp->mbuf_out_flush[port] = 0;
+ }
+ }
+}
+
+static inline void
+app_lcore_worker_flush(struct app_lcore_params_worker *lp)
+{
+ uint32_t port;
+
+ for (port = 0; port < APP_MAX_NIC_PORTS; port ++) {
+ int ret;
+
+ if (unlikely(lp->rings_out[port] == NULL)) {
+ continue;
+ }
+
+ if (likely((lp->mbuf_out_flush[port] == 0) ||
+            (lp->mbuf_out[port].n_mbufs == 0))) {
+ lp->mbuf_out_flush[port] = 1;
+ continue;
+ }
+
+ ret = rte_ring_sp_enqueue_bulk(
+ lp->rings_out[port],
+ (void **) lp->mbuf_out[port].array,
+ lp->mbuf_out[port].n_mbufs);
+
+ if (unlikely(ret < 0)) {
+ uint32_t k;
+ for (k = 0; k < lp->mbuf_out[port].n_mbufs; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->mbuf_out[port].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+
+ lp->mbuf_out[port].n_mbufs = 0;
+ lp->mbuf_out_flush[port] = 1;
+ }
+}
+
+static void
+app_lcore_main_loop_worker(void) {
+ uint32_t lcore = rte_lcore_id();
+ struct app_lcore_params_worker *lp = &app.lcore_params[lcore].worker;
+ uint64_t i = 0;
+
+ uint32_t bsz_rd = app.burst_size_worker_read;
+ uint32_t bsz_wr = app.burst_size_worker_write;
+
+ for ( ; ; ) {
+ if (APP_LCORE_WORKER_FLUSH && (unlikely(i == APP_LCORE_WORKER_FLUSH))) {
+ app_lcore_worker_flush(lp);
+ i = 0;
+ }
+
+ app_lcore_worker(lp, bsz_rd, bsz_wr);
+
+ i ++;
+ }
+}
+
+int
+app_lcore_main_loop(__attribute__((unused)) void *arg)
+{
+ struct app_lcore_params *lp;
+ unsigned lcore;
+
+ lcore = rte_lcore_id();
+ lp = &app.lcore_params[lcore];
+
+ if (lp->type == e_APP_LCORE_IO) {
+ printf("Logical core %u (I/O) main loop.\n", lcore);
+ app_lcore_main_loop_io();
+ }
+
+ if (lp->type == e_APP_LCORE_WORKER) {
+ printf("Logical core %u (worker %u) main loop.\n",
+ lcore,
+ (unsigned) lp->worker.worker_id);
+ app_lcore_main_loop_worker();
+ }
+
+ return 0;
+}
diff --git a/b/examples/load_balancer/runtime.c b/b/examples/load_balancer/runtime.c
new file mode 100644
index 0000000..3a2e900
--- /dev/null
+++ b/b/examples/load_balancer/runtime.c
@@ -0,0 +1,669 @@
+/*-
+ *   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 <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <string.h>
+#include <sys/queue.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <getopt.h>
+
+#include <rte_common.h>
+#include <rte_byteorder.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memcpy.h>
+#include <rte_memzone.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_prefetch.h>
+#include <rte_lcore.h>
+#include <rte_per_lcore.h>
+#include <rte_branch_prediction.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_random.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_ring.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_ip.h>
+#include <rte_tcp.h>
+#include <rte_lpm.h>
+
+#include "main.h"
+
+#ifndef APP_LCORE_IO_FLUSH
+#define APP_LCORE_IO_FLUSH           1000000
+#endif
+
+#ifndef APP_LCORE_WORKER_FLUSH
+#define APP_LCORE_WORKER_FLUSH       1000000
+#endif
+
+#ifndef APP_STATS
+#define APP_STATS                    1000000
+#endif
+
+#define APP_IO_RX_DROP_ALL_PACKETS   0
+#define APP_WORKER_DROP_ALL_PACKETS  0
+#define APP_IO_TX_DROP_ALL_PACKETS   0
+
+#ifndef APP_IO_RX_PREFETCH_ENABLE
+#define APP_IO_RX_PREFETCH_ENABLE    1
+#endif
+
+#ifndef APP_WORKER_PREFETCH_ENABLE
+#define APP_WORKER_PREFETCH_ENABLE   1
+#endif
+
+#ifndef APP_IO_TX_PREFETCH_ENABLE
+#define APP_IO_TX_PREFETCH_ENABLE    1
+#endif
+
+#if APP_IO_RX_PREFETCH_ENABLE
+#define APP_IO_RX_PREFETCH0(p)       rte_prefetch0(p)
+#define APP_IO_RX_PREFETCH1(p)       rte_prefetch1(p)
+#else
+#define APP_IO_RX_PREFETCH0(p)
+#define APP_IO_RX_PREFETCH1(p)
+#endif
+
+#if APP_WORKER_PREFETCH_ENABLE
+#define APP_WORKER_PREFETCH0(p)      rte_prefetch0(p)
+#define APP_WORKER_PREFETCH1(p)      rte_prefetch1(p)
+#else
+#define APP_WORKER_PREFETCH0(p)
+#define APP_WORKER_PREFETCH1(p)
+#endif
+
+#if APP_IO_TX_PREFETCH_ENABLE
+#define APP_IO_TX_PREFETCH0(p)       rte_prefetch0(p)
+#define APP_IO_TX_PREFETCH1(p)       rte_prefetch1(p)
+#else
+#define APP_IO_TX_PREFETCH0(p)
+#define APP_IO_TX_PREFETCH1(p)
+#endif
+
+static inline void
+app_lcore_io_rx_buffer_to_send (
+ struct app_lcore_params_io *lp,
+ uint32_t worker,
+ struct rte_mbuf *mbuf,
+ uint32_t bsz)
+{
+ uint32_t pos;
+ int ret;
+
+ pos = lp->rx.mbuf_out[worker].n_mbufs;
+ lp->rx.mbuf_out[worker].array[pos ++] = mbuf;
+ if (likely(pos < bsz)) {
+ lp->rx.mbuf_out[worker].n_mbufs = pos;
+ return;
+ }
+
+ ret = rte_ring_sp_enqueue_bulk(
+ lp->rx.rings[worker],
+ (void **) lp->rx.mbuf_out[worker].array,
+ bsz);
+
+ if (unlikely(ret == -ENOBUFS)) {
+ uint32_t k;
+ for (k = 0; k < bsz; k ++) {
+ struct rte_mbuf *m = lp->rx.mbuf_out[worker].array[k];
+ rte_pktmbuf_free(m);
+ }
+ }
+
+ lp->rx.mbuf_out[worker].n_mbufs = 0;
+ lp->rx.mbuf_out_flush[worker] = 0;
+
+#if APP_STATS
+ lp->rx.rings_iters[worker] ++;
+ if (likely(ret == 0)) {
+ lp->rx.rings_count[worker] ++;
+ }
+ if (unlikely(lp->rx.rings_iters[worker] == APP_STATS)) {
+ unsigned lcore = rte_lcore_id();
+
+ printf("\tI/O RX %u out (worker %u): enq success rate = %.2f\n",
+ lcore,
+ (unsigned)worker,
+ ((double) lp->rx.rings_count[worker]) / ((double) lp->rx.rings_iters[worker]));
+ lp->rx.rings_iters[worker] = 0;
+ lp->rx.rings_count[worker] = 0;
+ }
+#endif
+}
+
+static inline void
+app_lcore_io_rx(
+ struct app_lcore_params_io *lp,
+ uint32_t n_workers,
+ uint32_t bsz_rd,
+ uint32_t bsz_wr,
+ uint8_t pos_lb)
+{
+ struct rte_mbuf *mbuf_1_0, *mbuf_1_1, *mbuf_2_0, *mbuf_2_1;
+ uint8_t *data_1_0, *data_1_1 = NULL;
+ uint32_t i;
+
+ for (i = 0; i < lp->rx.n_nic_queues; i ++) {
+ uint8_t port = lp->rx.nic_queues[i].port;
+ uint8_t queue = lp->rx.nic_queues[i].queue;
+ uint32_t n_mbufs, j;
+
+ n_mbufs = rte_eth_rx_burst(
+ port,
+ queue,
+ lp->rx.mbuf_in.array,
+ (uint16_t) bsz_rd);
+
+ if (unlikely(n_mbufs == 0)) {
+ continue;
+ }
+
+#if APP_STATS
+ lp->rx.nic_queues_iters[i] ++;
+ lp->rx.nic_queues_count[i] += n_mbufs;
+ if (unlikely(lp->rx.nic_queues_iters[i] == APP_STATS)) {
+ struct rte_eth_stats stats;
+ unsigned lcore = rte_lcore_id();
+
+ rte_eth_stats_get(port, &stats);
+
+ printf("I/O RX %u in (NIC port %u): NIC drop ratio = %.2f avg burst size = %.2f\n",
+ lcore,
+ (unsigned) port,
+ (double) stats.imissed / (double) (stats.imissed + stats.ipackets),
+ ((double) lp->rx.nic_queues_count[i]) / ((double) lp->rx.nic_queues_iters[i]));
+ lp->rx.nic_queues_iters[i] = 0;
+ lp->rx.nic_queues_count[i] = 0;
+ }
+#endif
+
+#if APP_IO_RX_DROP_ALL_PACKETS
+ for (j = 0; j < n_mbufs; j ++) {
+ struct rte_mbuf *pkt = lp->rx.mbuf_in.array[j];
+ rte_pktmbuf_free(pkt);
+ }
+
+ continue;
+#endif
+
+ mbuf_1_0 = lp->rx.mbuf_in.array[0];
+ mbuf_1_1 = lp->rx.mbuf_in.array[1];
+ data_1_0 = rte_pktmbuf_mtod(mbuf_1_0, uint8_t *);
+ if (likely(n_mbufs > 1)) {
+ data_1_1 = rte_pktmbuf_mtod(mbuf_1_1, uint8_t *);
+ }
+
+ mbuf_2_0 = lp->rx.mbuf_in.array[2];
+ mbuf_2_1 = lp->rx.mbuf_in.array[3];
+ APP_IO_RX_PREFETCH0(mbuf_2_0);
+ APP_IO_RX_PREFETCH0(mbuf_2_1);
+
+ for (j = 0; j + 3 < n_mbufs; j += 2) {
+ struct rte_mbuf *mbuf_0_0, *mbuf_0_1;
+ uint8_t *data_0_0, *data_0_1;
+ uint32_t worker_0, worker_1;
+
+ mbuf_0_0 = mbuf_1_0;
+ mbuf_0_1 = mbuf_1_1;
+ data_0_0 = data_1_0;
+ data_0_1 = data_1_1;
+
+ mbuf_1_0 = mbuf_2_0;
+ mbuf_1_1 = mbuf_2_1;
+ data_1_0 = rte_pktmbuf_mtod(mbuf_2_0, uint8_t *);
+ data_1_1 = rte_pktmbuf_mtod(mbuf_2_1, uint8_t *);
+ APP_IO_RX_PREFETCH0(data_1_0);
+ APP_IO_RX_PREFETCH0(data_1_1);
+
+ mbuf_2_0 = lp->rx.mbuf_in.array[j+4];
+ mbuf_2_1 = lp->rx.mbuf_in.array[j+5];
+ APP_IO_RX_PREFETCH0(mbuf_2_0);
+ APP_IO_RX_PREFETCH0(mbuf_2_1);
+
+ worker_0 = data_0_0[pos_lb] & (n_workers - 1);
+ worker_1 = data_0_1[pos_lb] & (n_workers - 1);
+
+ app_lcore_io_rx_buffer_to_send(lp, worker_0, mbuf_0_0, bsz_wr);
+ app_lcore_io_rx_buffer_to_send(lp, worker_1, mbuf_0_1, bsz_wr);
+ }
+
+ /* Handle the last 1, 2 (when n_mbufs is even) or 3 (when n_mbufs is odd) packets  */
+ for ( ; j < n_mbufs; j += 1) {
+ struct rte_mbuf *mbuf;
+ uint8_t *data;
+ uint32_t worker;
+
+ mbuf = mbuf_1_0;
+ mbuf_1_0 = mbuf_1_1;
+ mbuf_1_1 = mbuf_2_0;
+ mbuf_2_0 = mbuf_2_1;
+
+ data = rte_pktmbuf_mtod(mbuf, uint8_t *);
+
+ APP_IO_RX_PREFETCH0(mbuf_1_0);
+
+ worker = data[pos_lb] & (n_workers - 1);
+
+ app_lcore_io_rx_buffer_to_send(lp, worker, mbuf, bsz_wr);
+ }
+ }
+}
+
+static inline void
+app_lcore_io_rx_flush(struct app_lcore_params_io *lp, uint32_t n_workers)
+{
+ uint32_t worker;
+
+ for (worker = 0; worker < n_workers; worker ++) {
+ int ret;
+
+ if (likely((lp->rx.mbuf_out_flush[worker] == 0) ||
+            (lp->rx.mbuf_out[worker].n_mbufs == 0))) {
+ lp->rx.mbuf_out_flush[worker] = 1;
+ continue;
+ }
+
+ ret = rte_ring_sp_enqueue_bulk(
+ lp->rx.rings[worker],
+ (void **) lp->rx.mbuf_out[worker].array,
+ lp->rx.mbuf_out[worker].n_mbufs);
+
+ if (unlikely(ret < 0)) {
+ uint32_t k;
+ for (k = 0; k < lp->rx.mbuf_out[worker].n_mbufs; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->rx.mbuf_out[worker].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+
+ lp->rx.mbuf_out[worker].n_mbufs = 0;
+ lp->rx.mbuf_out_flush[worker] = 1;
+ }
+}
+
+static inline void
+app_lcore_io_tx(
+ struct app_lcore_params_io *lp,
+ uint32_t n_workers,
+ uint32_t bsz_rd,
+ uint32_t bsz_wr)
+{
+ uint32_t worker;
+
+ for (worker = 0; worker < n_workers; worker ++) {
+ uint32_t i;
+
+ for (i = 0; i < lp->tx.n_nic_ports; i ++) {
+ uint8_t port = lp->tx.nic_ports[i];
+ struct rte_ring *ring = lp->tx.rings[port][worker];
+ uint32_t n_mbufs, n_pkts;
+ int ret;
+
+ n_mbufs = lp->tx.mbuf_out[port].n_mbufs;
+ ret = rte_ring_sc_dequeue_bulk(
+ ring,
+ (void **) &lp->tx.mbuf_out[port].array[n_mbufs],
+ bsz_rd);
+
+ if (unlikely(ret == -ENOENT)) {
+ continue;
+ }
+
+ n_mbufs += bsz_rd;
+
+#if APP_IO_TX_DROP_ALL_PACKETS
+ {
+ uint32_t j;
+ APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[0]);
+ APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[1]);
+
+ for (j = 0; j < n_mbufs; j ++) {
+ if (likely(j < n_mbufs - 2)) {
+ APP_IO_TX_PREFETCH0(lp->tx.mbuf_out[port].array[j + 2]);
+ }
+
+ rte_pktmbuf_free(lp->tx.mbuf_out[port].array[j]);
+ }
+
+ lp->tx.mbuf_out[port].n_mbufs = 0;
+
+ continue;
+ }
+#endif
+
+ if (unlikely(n_mbufs < bsz_wr)) {
+ lp->tx.mbuf_out[port].n_mbufs = n_mbufs;
+ continue;
+ }
+
+ n_pkts = rte_eth_tx_burst(
+ port,
+ 0,
+ lp->tx.mbuf_out[port].array,
+ (uint16_t) n_mbufs);
+
+#if APP_STATS
+ lp->tx.nic_ports_iters[port] ++;
+ lp->tx.nic_ports_count[port] += n_pkts;
+ if (unlikely(lp->tx.nic_ports_iters[port] == APP_STATS)) {
+ unsigned lcore = rte_lcore_id();
+
+ printf("\t\t\tI/O TX %u out (port %u): avg burst size = %.2f\n",
+ lcore,
+ (unsigned) port,
+ ((double) lp->tx.nic_ports_count[port]) / ((double) lp->tx.nic_ports_iters[port]));
+ lp->tx.nic_ports_iters[port] = 0;
+ lp->tx.nic_ports_count[port] = 0;
+ }
+#endif
+
+ if (unlikely(n_pkts < n_mbufs)) {
+ uint32_t k;
+ for (k = n_pkts; k < n_mbufs; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->tx.mbuf_out[port].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+ lp->tx.mbuf_out[port].n_mbufs = 0;
+ lp->tx.mbuf_out_flush[port] = 0;
+ }
+ }
+}
+
+static inline void
+app_lcore_io_tx_flush(struct app_lcore_params_io *lp)
+{
+ uint8_t i;
+ uint8_t port;
+
+ port = lp->tx.nic_ports[0];
+ for (i = 0; i < lp->tx.n_nic_ports; i ++) {
+ uint32_t n_pkts;
+
+ if (likely((lp->tx.mbuf_out_flush[port] == 0) ||
+            (lp->tx.mbuf_out[port].n_mbufs == 0))) {
+ lp->tx.mbuf_out_flush[port] = 1;
+ continue;
+ }
+
+ n_pkts = rte_eth_tx_burst(
+ port,
+ 0,
+ lp->tx.mbuf_out[port].array,
+ (uint16_t) lp->tx.mbuf_out[port].n_mbufs);
+
+ if (unlikely(n_pkts < lp->tx.mbuf_out[port].n_mbufs)) {
+ uint32_t k;
+ for (k = n_pkts; k < lp->tx.mbuf_out[port].n_mbufs; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->tx.mbuf_out[port].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+
+ lp->tx.mbuf_out[port].n_mbufs = 0;
+ lp->tx.mbuf_out_flush[port] = 1;
+ }
+}
+
+static void
+app_lcore_main_loop_io(void)
+{
+ uint32_t lcore = rte_lcore_id();
+ struct app_lcore_params_io *lp = &app.lcore_params[lcore].io;
+ uint32_t n_workers = app_get_lcores_worker();
+ uint64_t i = 0;
+
+ uint32_t bsz_rx_rd = app.burst_size_io_rx_read;
+ uint32_t bsz_rx_wr = app.burst_size_io_rx_write;
+ uint32_t bsz_tx_rd = app.burst_size_io_tx_read;
+ uint32_t bsz_tx_wr = app.burst_size_io_tx_write;
+
+ uint8_t pos_lb = app.pos_lb;
+
+ for ( ; ; ) {
+ if (APP_LCORE_IO_FLUSH && (unlikely(i == APP_LCORE_IO_FLUSH))) {
+ if (likely(lp->rx.n_nic_queues > 0)) {
+ app_lcore_io_rx_flush(lp, n_workers);
+ }
+
+ if (likely(lp->tx.n_nic_ports > 0)) {
+ app_lcore_io_tx_flush(lp);
+ }
+
+ i = 0;
+ }
+
+ if (likely(lp->rx.n_nic_queues > 0)) {
+ app_lcore_io_rx(lp, n_workers, bsz_rx_rd, bsz_rx_wr, pos_lb);
+ }
+
+ if (likely(lp->tx.n_nic_ports > 0)) {
+ app_lcore_io_tx(lp, n_workers, bsz_tx_rd, bsz_tx_wr);
+ }
+
+ i ++;
+ }
+}
+
+static inline void
+app_lcore_worker(
+ struct app_lcore_params_worker *lp,
+ uint32_t bsz_rd,
+ uint32_t bsz_wr)
+{
+ uint32_t i;
+
+ for (i = 0; i < lp->n_rings_in; i ++) {
+ struct rte_ring *ring_in = lp->rings_in[i];
+ uint32_t j;
+ int ret;
+
+ ret = rte_ring_sc_dequeue_bulk(
+ ring_in,
+ (void **) lp->mbuf_in.array,
+ bsz_rd);
+
+ if (unlikely(ret == -ENOENT)) {
+ continue;
+ }
+
+#if APP_WORKER_DROP_ALL_PACKETS
+ for (j = 0; j < bsz_rd; j ++) {
+ struct rte_mbuf *pkt = lp->mbuf_in.array[j];
+ rte_pktmbuf_free(pkt);
+ }
+
+ continue;
+#endif
+
+ APP_WORKER_PREFETCH1(rte_pktmbuf_mtod(lp->mbuf_in.array[0], unsigned char *));
+ APP_WORKER_PREFETCH0(lp->mbuf_in.array[1]);
+
+ for (j = 0; j < bsz_rd; j ++) {
+ struct rte_mbuf *pkt;
+ struct ipv4_hdr *ipv4_hdr;
+ uint32_t ipv4_dst, pos;
+ uint8_t port;
+
+ if (likely(j < bsz_rd - 1)) {
+ APP_WORKER_PREFETCH1(rte_pktmbuf_mtod(lp->mbuf_in.array[j+1], unsigned char *));
+ }
+ if (likely(j < bsz_rd - 2)) {
+ APP_WORKER_PREFETCH0(lp->mbuf_in.array[j+2]);
+ }
+
+ pkt = lp->mbuf_in.array[j];
+ ipv4_hdr = (struct ipv4_hdr *)(rte_pktmbuf_mtod(pkt, unsigned char *) + sizeof(struct ether_hdr));
+ ipv4_dst = rte_be_to_cpu_32(ipv4_hdr->dst_addr);
+
+ if (unlikely(rte_lpm_lookup(lp->lpm_table, ipv4_dst, &port) != 0)) {
+ port = pkt->pkt.in_port;
+ }
+
+ pos = lp->mbuf_out[port].n_mbufs;
+
+ lp->mbuf_out[port].array[pos ++] = pkt;
+ if (likely(pos < bsz_wr)) {
+ lp->mbuf_out[port].n_mbufs = pos;
+ continue;
+ }
+
+ ret = rte_ring_sp_enqueue_bulk(
+ lp->rings_out[port],
+ (void **) lp->mbuf_out[port].array,
+ bsz_wr);
+
+#if APP_STATS
+ lp->rings_out_iters[port] ++;
+ if (ret == 0) {
+ lp->rings_out_count[port] += 1;
+ }
+ if (lp->rings_out_iters[port] == APP_STATS){
+ printf("\t\tWorker %u out (NIC port %u): enq success rate = %.2f\n",
+ (unsigned) lp->worker_id,
+ (unsigned) port,
+ ((double) lp->rings_out_count[port]) / ((double) lp->rings_out_iters[port]));
+ lp->rings_out_iters[port] = 0;
+ lp->rings_out_count[port] = 0;
+ }
+#endif
+
+ if (unlikely(ret == -ENOBUFS)) {
+ uint32_t k;
+ for (k = 0; k < bsz_wr; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->mbuf_out[port].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+
+ lp->mbuf_out[port].n_mbufs = 0;
+ lp->mbuf_out_flush[port] = 0;
+ }
+ }
+}
+
+static inline void
+app_lcore_worker_flush(struct app_lcore_params_worker *lp)
+{
+ uint32_t port;
+
+ for (port = 0; port < APP_MAX_NIC_PORTS; port ++) {
+ int ret;
+
+ if (unlikely(lp->rings_out[port] == NULL)) {
+ continue;
+ }
+
+ if (likely((lp->mbuf_out_flush[port] == 0) ||
+            (lp->mbuf_out[port].n_mbufs == 0))) {
+ lp->mbuf_out_flush[port] = 1;
+ continue;
+ }
+
+ ret = rte_ring_sp_enqueue_bulk(
+ lp->rings_out[port],
+ (void **) lp->mbuf_out[port].array,
+ lp->mbuf_out[port].n_mbufs);
+
+ if (unlikely(ret < 0)) {
+ uint32_t k;
+ for (k = 0; k < lp->mbuf_out[port].n_mbufs; k ++) {
+ struct rte_mbuf *pkt_to_free = lp->mbuf_out[port].array[k];
+ rte_pktmbuf_free(pkt_to_free);
+ }
+ }
+
+ lp->mbuf_out[port].n_mbufs = 0;
+ lp->mbuf_out_flush[port] = 1;
+ }
+}
+
+static void
+app_lcore_main_loop_worker(void) {
+ uint32_t lcore = rte_lcore_id();
+ struct app_lcore_params_worker *lp = &app.lcore_params[lcore].worker;
+ uint64_t i = 0;
+
+ uint32_t bsz_rd = app.burst_size_worker_read;
+ uint32_t bsz_wr = app.burst_size_worker_write;
+
+ for ( ; ; ) {
+ if (APP_LCORE_WORKER_FLUSH && (unlikely(i == APP_LCORE_WORKER_FLUSH))) {
+ app_lcore_worker_flush(lp);
+ i = 0;
+ }
+
+ app_lcore_worker(lp, bsz_rd, bsz_wr);
+
+ i ++;
+ }
+}
+
+int
+app_lcore_main_loop(__attribute__((unused)) void *arg)
+{
+ struct app_lcore_params *lp;
+ unsigned lcore;
+
+ lcore = rte_lcore_id();
+ lp = &app.lcore_params[lcore];
+
+ if (lp->type == e_APP_LCORE_IO) {
+ printf("Logical core %u (I/O) main loop.\n", lcore);
+ app_lcore_main_loop_io();
+ }
+
+ if (lp->type == e_APP_LCORE_WORKER) {
+ printf("Logical core %u (worker %u) main loop.\n",
+ lcore,
+ (unsigned) lp->worker.worker_id);
+ app_lcore_main_loop_worker();
+ }
+
+ return 0;
+}
-- 
1.9.1