examples/qos_sched/app_thread.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdint.h>
  35
  36 #include <rte_log.h>
  37 #include <rte_mbuf.h>
  38 #include <rte_malloc.h>
  39 #include <rte_cycles.h>
  40 #include <rte_ethdev.h>
  41 #include <rte_memcpy.h>
  42 #include <rte_byteorder.h>
  43 #include <rte_branch_prediction.h>
  44 #include <rte_sched.h>
  45
  46 #include "main.h"
  47
  48 /*
  49  * QoS parameters are encoded as follows:
  50  *              Outer VLAN ID defines subport
  51  *              Inner VLAN ID defines pipe
  52  *              Destination IP 0.0.XXX.0 defines traffic class
  53  *              Destination IP host (0.0.0.XXX) defines queue
  54  * Values below define offset to each field from start of frame
  55  */
  56 #define SUBPORT_OFFSET  7
  57 #define PIPE_OFFSET             9
  58 #define TC_OFFSET               20
  59 #define QUEUE_OFFSET    20
  60 #define COLOR_OFFSET    19
  61
  62 static inline int
  63 get_pkt_sched(struct rte_mbuf *m, uint32_t *subport, uint32_t *pipe,
  64                         uint32_t *traffic_class, uint32_t *queue, uint32_t *color)
  65 {
  66         uint16_t *pdata = rte_pktmbuf_mtod(m, uint16_t *);
  67
  68         *subport = (rte_be_to_cpu_16(pdata[SUBPORT_OFFSET]) & 0x0FFF) &
  69                         (port_params.n_subports_per_port - 1); /* Outer VLAN ID*/
  70         *pipe = (rte_be_to_cpu_16(pdata[PIPE_OFFSET]) & 0x0FFF) &
  71                         (port_params.n_pipes_per_subport - 1); /* Inner VLAN ID */
  72         *traffic_class = (pdata[QUEUE_OFFSET] & 0x0F) &
  73                         (RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE - 1); /* Destination IP */
  74         *queue = ((pdata[QUEUE_OFFSET] >> 8) & 0x0F) &
  75                         (RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS - 1) ; /* Destination IP */
  76         *color = pdata[COLOR_OFFSET] & 0x03;    /* Destination IP */
  77
  78         return 0;
  79 }
  80
  81 void
  82 app_rx_thread(struct thread_conf **confs)
  83 {
  84         uint32_t i, nb_rx;
  85         struct rte_mbuf *rx_mbufs[burst_conf.rx_burst] __rte_cache_aligned;
  86         struct thread_conf *conf;
  87         int conf_idx = 0;
  88
  89         uint32_t subport;
  90         uint32_t pipe;
  91         uint32_t traffic_class;
  92         uint32_t queue;
  93         uint32_t color;
  94
  95         while ((conf = confs[conf_idx])) {
  96                 nb_rx = rte_eth_rx_burst(conf->rx_port, conf->rx_queue, rx_mbufs,
  97                                 burst_conf.rx_burst);
  98
  99                 if (likely(nb_rx != 0)) {
 100                         APP_STATS_ADD(conf->stat.nb_rx, nb_rx);
 101
 102                         for(i = 0; i < nb_rx; i++) {
 103                                 get_pkt_sched(rx_mbufs[i],
 104                                                 &subport, &pipe, &traffic_class, &queue, &color);
 105                                 rte_sched_port_pkt_write(rx_mbufs[i], subport, pipe,
 106                                                 traffic_class, queue, (enum rte_meter_color) color);
 107                         }
 108
 109                         if (unlikely(rte_ring_sp_enqueue_bulk(conf->rx_ring,
 110                                         (void **)rx_mbufs, nb_rx, NULL) == 0)) {
 111                                 for(i = 0; i < nb_rx; i++) {
 112                                         rte_pktmbuf_free(rx_mbufs[i]);
 113
 114                                         APP_STATS_ADD(conf->stat.nb_drop, 1);
 115                                 }
 116                         }
 117                 }
 118                 conf_idx++;
 119                 if (confs[conf_idx] == NULL)
 120                         conf_idx = 0;
 121         }
 122 }
 123
 124
 125
 126 /* Send the packet to an output interface
 127  * For performance reason function returns number of packets dropped, not sent,
 128  * so 0 means that all packets were sent successfully
 129  */
 130
 131 static inline void
 132 app_send_burst(struct thread_conf *qconf)
 133 {
 134         struct rte_mbuf **mbufs;
 135         uint32_t n, ret;
 136
 137         mbufs = (struct rte_mbuf **)qconf->m_table;
 138         n = qconf->n_mbufs;
 139
 140         do {
 141                 ret = rte_eth_tx_burst(qconf->tx_port, qconf->tx_queue, mbufs, (uint16_t)n);
 142                 /* we cannot drop the packets, so re-send */
 143                 /* update number of packets to be sent */
 144                 n -= ret;
 145                 mbufs = (struct rte_mbuf **)&mbufs[ret];
 146         } while (n);
 147 }
 148
 149
 150 /* Send the packet to an output interface */
 151 static void
 152 app_send_packets(struct thread_conf *qconf, struct rte_mbuf **mbufs, uint32_t nb_pkt)
 153 {
 154         uint32_t i, len;
 155
 156         len = qconf->n_mbufs;
 157         for(i = 0; i < nb_pkt; i++) {
 158                 qconf->m_table[len] = mbufs[i];
 159                 len++;
 160                 /* enough pkts to be sent */
 161                 if (unlikely(len == burst_conf.tx_burst)) {
 162                         qconf->n_mbufs = len;
 163                         app_send_burst(qconf);
 164                         len = 0;
 165                 }
 166         }
 167
 168         qconf->n_mbufs = len;
 169 }
 170
 171 void
 172 app_tx_thread(struct thread_conf **confs)
 173 {
 174         struct rte_mbuf *mbufs[burst_conf.qos_dequeue];
 175         struct thread_conf *conf;
 176         int conf_idx = 0;
 177         int retval;
 178         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 179
 180         while ((conf = confs[conf_idx])) {
 181                 retval = rte_ring_sc_dequeue_bulk(conf->tx_ring, (void **)mbufs,
 182                                         burst_conf.qos_dequeue, NULL);
 183                 if (likely(retval != 0)) {
 184                         app_send_packets(conf, mbufs, burst_conf.qos_dequeue);
 185
 186                         conf->counter = 0; /* reset empty read loop counter */
 187                 }
 188
 189                 conf->counter++;
 190
 191                 /* drain ring and TX queues */
 192                 if (unlikely(conf->counter > drain_tsc)) {
 193                         /* now check is there any packets left to be transmitted */
 194                         if (conf->n_mbufs != 0) {
 195                                 app_send_burst(conf);
 196
 197                                 conf->n_mbufs = 0;
 198                         }
 199                         conf->counter = 0;
 200                 }
 201
 202                 conf_idx++;
 203                 if (confs[conf_idx] == NULL)
 204                         conf_idx = 0;
 205         }
 206 }
 207
 208
 209 void
 210 app_worker_thread(struct thread_conf **confs)
 211 {
 212         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 213         struct thread_conf *conf;
 214         int conf_idx = 0;
 215
 216         while ((conf = confs[conf_idx])) {
 217                 uint32_t nb_pkt;
 218
 219                 /* Read packet from the ring */
 220                 nb_pkt = rte_ring_sc_dequeue_burst(conf->rx_ring, (void **)mbufs,
 221                                         burst_conf.ring_burst, NULL);
 222                 if (likely(nb_pkt)) {
 223                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 224                                         nb_pkt);
 225
 226                         APP_STATS_ADD(conf->stat.nb_drop, nb_pkt - nb_sent);
 227                         APP_STATS_ADD(conf->stat.nb_rx, nb_pkt);
 228                 }
 229
 230                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 231                                         burst_conf.qos_dequeue);
 232                 if (likely(nb_pkt > 0))
 233                         while (rte_ring_sp_enqueue_bulk(conf->tx_ring,
 234                                         (void **)mbufs, nb_pkt, NULL) == 0)
 235                                 ; /* empty body */
 236
 237                 conf_idx++;
 238                 if (confs[conf_idx] == NULL)
 239                         conf_idx = 0;
 240         }
 241 }
 242
 243
 244 void
 245 app_mixed_thread(struct thread_conf **confs)
 246 {
 247         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 248         struct thread_conf *conf;
 249         int conf_idx = 0;
 250         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 251
 252         while ((conf = confs[conf_idx])) {
 253                 uint32_t nb_pkt;
 254
 255                 /* Read packet from the ring */
 256                 nb_pkt = rte_ring_sc_dequeue_burst(conf->rx_ring, (void **)mbufs,
 257                                         burst_conf.ring_burst, NULL);
 258                 if (likely(nb_pkt)) {
 259                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 260                                         nb_pkt);
 261
 262                         APP_STATS_ADD(conf->stat.nb_drop, nb_pkt - nb_sent);
 263                         APP_STATS_ADD(conf->stat.nb_rx, nb_pkt);
 264                 }
 265
 266
 267                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 268                                         burst_conf.qos_dequeue);
 269                 if (likely(nb_pkt > 0)) {
 270                         app_send_packets(conf, mbufs, nb_pkt);
 271
 272                         conf->counter = 0; /* reset empty read loop counter */
 273                 }
 274
 275                 conf->counter++;
 276
 277                 /* drain ring and TX queues */
 278                 if (unlikely(conf->counter > drain_tsc)) {
 279
 280                         /* now check is there any packets left to be transmitted */
 281                         if (conf->n_mbufs != 0) {
 282                                 app_send_burst(conf);
 283
 284                                 conf->n_mbufs = 0;
 285                         }
 286                         conf->counter = 0;
 287                 }
 288
 289                 conf_idx++;
 290                 if (confs[conf_idx] == NULL)
 291                         conf_idx = 0;
 292         }
 293 }