examples/qos_sched/app_thread.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #include <stdint.h>
   6
   7 #include <rte_log.h>
   8 #include <rte_mbuf.h>
   9 #include <rte_malloc.h>
  10 #include <rte_cycles.h>
  11 #include <rte_ethdev.h>
  12 #include <rte_memcpy.h>
  13 #include <rte_byteorder.h>
  14 #include <rte_branch_prediction.h>
  15 #include <rte_sched.h>
  16
  17 #include "main.h"
  18
  19 /*
  20  * QoS parameters are encoded as follows:
  21  *              Outer VLAN ID defines subport
  22  *              Inner VLAN ID defines pipe
  23  *              Destination IP host (0.0.0.XXX) defines queue
  24  * Values below define offset to each field from start of frame
  25  */
  26 #define SUBPORT_OFFSET  7
  27 #define PIPE_OFFSET             9
  28 #define QUEUE_OFFSET    20
  29 #define COLOR_OFFSET    19
  30
  31 static inline int
  32 get_pkt_sched(struct rte_mbuf *m, uint32_t *subport, uint32_t *pipe,
  33                         uint32_t *traffic_class, uint32_t *queue, uint32_t *color)
  34 {
  35         uint16_t *pdata = rte_pktmbuf_mtod(m, uint16_t *);
  36         uint16_t pipe_queue;
  37
  38         /* Outer VLAN ID*/
  39         *subport = (rte_be_to_cpu_16(pdata[SUBPORT_OFFSET]) & 0x0FFF) &
  40                 (port_params.n_subports_per_port - 1);
  41
  42         /* Inner VLAN ID */
  43         *pipe = (rte_be_to_cpu_16(pdata[PIPE_OFFSET]) & 0x0FFF) &
  44                 (subport_params[*subport].n_pipes_per_subport_enabled - 1);
  45
  46         pipe_queue = active_queues[(pdata[QUEUE_OFFSET] >> 8) % n_active_queues];
  47
  48         /* Traffic class (Destination IP) */
  49         *traffic_class = pipe_queue > RTE_SCHED_TRAFFIC_CLASS_BE ?
  50                         RTE_SCHED_TRAFFIC_CLASS_BE : pipe_queue;
  51
  52         /* Traffic class queue (Destination IP) */
  53         *queue = pipe_queue - *traffic_class;
  54
  55         /* Color (Destination IP) */
  56         *color = pdata[COLOR_OFFSET] & 0x03;
  57
  58         return 0;
  59 }
  60
  61 void
  62 app_rx_thread(struct thread_conf **confs)
  63 {
  64         uint32_t i, nb_rx;
  65         struct rte_mbuf *rx_mbufs[burst_conf.rx_burst] __rte_cache_aligned;
  66         struct thread_conf *conf;
  67         int conf_idx = 0;
  68
  69         uint32_t subport;
  70         uint32_t pipe;
  71         uint32_t traffic_class;
  72         uint32_t queue;
  73         uint32_t color;
  74
  75         while ((conf = confs[conf_idx])) {
  76                 nb_rx = rte_eth_rx_burst(conf->rx_port, conf->rx_queue, rx_mbufs,
  77                                 burst_conf.rx_burst);
  78
  79                 if (likely(nb_rx != 0)) {
  80                         APP_STATS_ADD(conf->stat.nb_rx, nb_rx);
  81
  82                         for(i = 0; i < nb_rx; i++) {
  83                                 get_pkt_sched(rx_mbufs[i],
  84                                                 &subport, &pipe, &traffic_class, &queue, &color);
  85                                 rte_sched_port_pkt_write(conf->sched_port,
  86                                                 rx_mbufs[i],
  87                                                 subport, pipe,
  88                                                 traffic_class, queue,
  89                                                 (enum rte_color) color);
  90                         }
  91
  92                         if (unlikely(rte_ring_sp_enqueue_bulk(conf->rx_ring,
  93                                         (void **)rx_mbufs, nb_rx, NULL) == 0)) {
  94                                 for(i = 0; i < nb_rx; i++) {
  95                                         rte_pktmbuf_free(rx_mbufs[i]);
  96
  97                                         APP_STATS_ADD(conf->stat.nb_drop, 1);
  98                                 }
  99                         }
 100                 }
 101                 conf_idx++;
 102                 if (confs[conf_idx] == NULL)
 103                         conf_idx = 0;
 104         }
 105 }
 106
 107
 108
 109 /* Send the packet to an output interface
 110  * For performance reason function returns number of packets dropped, not sent,
 111  * so 0 means that all packets were sent successfully
 112  */
 113
 114 static inline void
 115 app_send_burst(struct thread_conf *qconf)
 116 {
 117         struct rte_mbuf **mbufs;
 118         uint32_t n, ret;
 119
 120         mbufs = (struct rte_mbuf **)qconf->m_table;
 121         n = qconf->n_mbufs;
 122
 123         do {
 124                 ret = rte_eth_tx_burst(qconf->tx_port, qconf->tx_queue, mbufs, (uint16_t)n);
 125                 /* we cannot drop the packets, so re-send */
 126                 /* update number of packets to be sent */
 127                 n -= ret;
 128                 mbufs = (struct rte_mbuf **)&mbufs[ret];
 129         } while (n);
 130 }
 131
 132
 133 /* Send the packet to an output interface */
 134 static void
 135 app_send_packets(struct thread_conf *qconf, struct rte_mbuf **mbufs, uint32_t nb_pkt)
 136 {
 137         uint32_t i, len;
 138
 139         len = qconf->n_mbufs;
 140         for(i = 0; i < nb_pkt; i++) {
 141                 qconf->m_table[len] = mbufs[i];
 142                 len++;
 143                 /* enough pkts to be sent */
 144                 if (unlikely(len == burst_conf.tx_burst)) {
 145                         qconf->n_mbufs = len;
 146                         app_send_burst(qconf);
 147                         len = 0;
 148                 }
 149         }
 150
 151         qconf->n_mbufs = len;
 152 }
 153
 154 void
 155 app_tx_thread(struct thread_conf **confs)
 156 {
 157         struct rte_mbuf *mbufs[burst_conf.qos_dequeue];
 158         struct thread_conf *conf;
 159         int conf_idx = 0;
 160         int retval;
 161         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 162
 163         while ((conf = confs[conf_idx])) {
 164                 retval = rte_ring_sc_dequeue_bulk(conf->tx_ring, (void **)mbufs,
 165                                         burst_conf.qos_dequeue, NULL);
 166                 if (likely(retval != 0)) {
 167                         app_send_packets(conf, mbufs, burst_conf.qos_dequeue);
 168
 169                         conf->counter = 0; /* reset empty read loop counter */
 170                 }
 171
 172                 conf->counter++;
 173
 174                 /* drain ring and TX queues */
 175                 if (unlikely(conf->counter > drain_tsc)) {
 176                         /* now check is there any packets left to be transmitted */
 177                         if (conf->n_mbufs != 0) {
 178                                 app_send_burst(conf);
 179
 180                                 conf->n_mbufs = 0;
 181                         }
 182                         conf->counter = 0;
 183                 }
 184
 185                 conf_idx++;
 186                 if (confs[conf_idx] == NULL)
 187                         conf_idx = 0;
 188         }
 189 }
 190
 191
 192 void
 193 app_worker_thread(struct thread_conf **confs)
 194 {
 195         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 196         struct thread_conf *conf;
 197         int conf_idx = 0;
 198
 199         while ((conf = confs[conf_idx])) {
 200                 uint32_t nb_pkt;
 201
 202                 /* Read packet from the ring */
 203                 nb_pkt = rte_ring_sc_dequeue_burst(conf->rx_ring, (void **)mbufs,
 204                                         burst_conf.ring_burst, NULL);
 205                 if (likely(nb_pkt)) {
 206                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 207                                         nb_pkt);
 208
 209                         APP_STATS_ADD(conf->stat.nb_drop, nb_pkt - nb_sent);
 210                         APP_STATS_ADD(conf->stat.nb_rx, nb_pkt);
 211                 }
 212
 213                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 214                                         burst_conf.qos_dequeue);
 215                 if (likely(nb_pkt > 0))
 216                         while (rte_ring_sp_enqueue_bulk(conf->tx_ring,
 217                                         (void **)mbufs, nb_pkt, NULL) == 0)
 218                                 ; /* empty body */
 219
 220                 conf_idx++;
 221                 if (confs[conf_idx] == NULL)
 222                         conf_idx = 0;
 223         }
 224 }
 225
 226
 227 void
 228 app_mixed_thread(struct thread_conf **confs)
 229 {
 230         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 231         struct thread_conf *conf;
 232         int conf_idx = 0;
 233         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 234
 235         while ((conf = confs[conf_idx])) {
 236                 uint32_t nb_pkt;
 237
 238                 /* Read packet from the ring */
 239                 nb_pkt = rte_ring_sc_dequeue_burst(conf->rx_ring, (void **)mbufs,
 240                                         burst_conf.ring_burst, NULL);
 241                 if (likely(nb_pkt)) {
 242                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 243                                         nb_pkt);
 244
 245                         APP_STATS_ADD(conf->stat.nb_drop, nb_pkt - nb_sent);
 246                         APP_STATS_ADD(conf->stat.nb_rx, nb_pkt);
 247                 }
 248
 249
 250                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 251                                         burst_conf.qos_dequeue);
 252                 if (likely(nb_pkt > 0)) {
 253                         app_send_packets(conf, mbufs, nb_pkt);
 254
 255                         conf->counter = 0; /* reset empty read loop counter */
 256                 }
 257
 258                 conf->counter++;
 259
 260                 /* drain ring and TX queues */
 261                 if (unlikely(conf->counter > drain_tsc)) {
 262
 263                         /* now check is there any packets left to be transmitted */
 264                         if (conf->n_mbufs != 0) {
 265                                 app_send_burst(conf);
 266
 267                                 conf->n_mbufs = 0;
 268                         }
 269                         conf->counter = 0;
 270                 }
 271
 272                 conf_idx++;
 273                 if (confs[conf_idx] == NULL)
 274                         conf_idx = 0;
 275         }
 276 }