examples/qos_sched/app_thread.c

   1 /*-
   2  *   BSD LICENSE
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  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
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  15  *       the documentation and/or other materials provided with the
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  19  *       from this software without specific prior written permission.
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  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) != 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                 if (unlikely(ret < n)) { /* 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                         /* limit number of retries to avoid endless loop */
 147                         /* reset retry counter if some packets were sent */
 148                         if (likely(ret != 0)) {
 149                                 continue;
 150                         }
 151                 }
 152         } while (ret != n);
 153 }
 154
 155
 156 /* Send the packet to an output interface */
 157 static void
 158 app_send_packets(struct thread_conf *qconf, struct rte_mbuf **mbufs, uint32_t nb_pkt)
 159 {
 160         uint32_t i, len;
 161
 162         len = qconf->n_mbufs;
 163         for(i = 0; i < nb_pkt; i++) {
 164                 qconf->m_table[len] = mbufs[i];
 165                 len++;
 166                 /* enough pkts to be sent */
 167                 if (unlikely(len == burst_conf.tx_burst)) {
 168                         qconf->n_mbufs = len;
 169                         app_send_burst(qconf);
 170                         len = 0;
 171                 }
 172         }
 173
 174         qconf->n_mbufs = len;
 175 }
 176
 177 void
 178 app_tx_thread(struct thread_conf **confs)
 179 {
 180         struct rte_mbuf *mbufs[burst_conf.qos_dequeue];
 181         struct thread_conf *conf;
 182         int conf_idx = 0;
 183         int retval;
 184         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 185
 186         while ((conf = confs[conf_idx])) {
 187                 retval = rte_ring_sc_dequeue_bulk(conf->tx_ring, (void **)mbufs,
 188                                         burst_conf.qos_dequeue);
 189                 if (likely(retval == 0)) {
 190                         app_send_packets(conf, mbufs, burst_conf.qos_dequeue);
 191
 192                         conf->counter = 0; /* reset empty read loop counter */
 193                 }
 194
 195                 conf->counter++;
 196
 197                 /* drain ring and TX queues */
 198                 if (unlikely(conf->counter > drain_tsc)) {
 199                         /* now check is there any packets left to be transmitted */
 200                         if (conf->n_mbufs != 0) {
 201                                 app_send_burst(conf);
 202
 203                                 conf->n_mbufs = 0;
 204                         }
 205                         conf->counter = 0;
 206                 }
 207
 208                 conf_idx++;
 209                 if (confs[conf_idx] == NULL)
 210                         conf_idx = 0;
 211         }
 212 }
 213
 214
 215 void
 216 app_worker_thread(struct thread_conf **confs)
 217 {
 218         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 219         struct thread_conf *conf;
 220         int conf_idx = 0;
 221
 222         while ((conf = confs[conf_idx])) {
 223                 uint32_t nb_pkt;
 224                 int retval;
 225
 226                 /* Read packet from the ring */
 227                 retval = rte_ring_sc_dequeue_bulk(conf->rx_ring, (void **)mbufs,
 228                                         burst_conf.ring_burst);
 229                 if (likely(retval == 0)) {
 230                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 231                                         burst_conf.ring_burst);
 232
 233                         APP_STATS_ADD(conf->stat.nb_drop, burst_conf.ring_burst - nb_sent);
 234                         APP_STATS_ADD(conf->stat.nb_rx, burst_conf.ring_burst);
 235                 }
 236
 237                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 238                                         burst_conf.qos_dequeue);
 239                 if (likely(nb_pkt > 0))
 240                         while (rte_ring_sp_enqueue_bulk(conf->tx_ring, (void **)mbufs, nb_pkt) != 0);
 241
 242                 conf_idx++;
 243                 if (confs[conf_idx] == NULL)
 244                         conf_idx = 0;
 245         }
 246 }
 247
 248
 249 void
 250 app_mixed_thread(struct thread_conf **confs)
 251 {
 252         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 253         struct thread_conf *conf;
 254         int conf_idx = 0;
 255         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 256
 257         while ((conf = confs[conf_idx])) {
 258                 uint32_t nb_pkt;
 259                 int retval;
 260
 261                 /* Read packet from the ring */
 262                 retval = rte_ring_sc_dequeue_bulk(conf->rx_ring, (void **)mbufs,
 263                                         burst_conf.ring_burst);
 264                 if (likely(retval == 0)) {
 265                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 266                                         burst_conf.ring_burst);
 267
 268                         APP_STATS_ADD(conf->stat.nb_drop, burst_conf.ring_burst - nb_sent);
 269                         APP_STATS_ADD(conf->stat.nb_rx, burst_conf.ring_burst);
 270                 }
 271
 272
 273                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 274                                         burst_conf.qos_dequeue);
 275                 if (likely(nb_pkt > 0)) {
 276                         app_send_packets(conf, mbufs, nb_pkt);
 277
 278                         conf->counter = 0; /* reset empty read loop counter */
 279                 }
 280
 281                 conf->counter++;
 282
 283                 /* drain ring and TX queues */
 284                 if (unlikely(conf->counter > drain_tsc)) {
 285
 286                         /* now check is there any packets left to be transmitted */
 287                         if (conf->n_mbufs != 0) {
 288                                 app_send_burst(conf);
 289
 290                                 conf->n_mbufs = 0;
 291                         }
 292                         conf->counter = 0;
 293                 }
 294
 295                 conf_idx++;
 296                 if (confs[conf_idx] == NULL)
 297                         conf_idx = 0;
 298         }
 299 }
 300
 301