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 0.0.XXX.0 defines traffic class
  24  *              Destination IP host (0.0.0.XXX) defines queue
  25  * Values below define offset to each field from start of frame
  26  */
  27 #define SUBPORT_OFFSET  7
  28 #define PIPE_OFFSET             9
  29 #define TC_OFFSET               20
  30 #define QUEUE_OFFSET    20
  31 #define COLOR_OFFSET    19
  32
  33 static inline int
  34 get_pkt_sched(struct rte_mbuf *m, uint32_t *subport, uint32_t *pipe,
  35                         uint32_t *traffic_class, uint32_t *queue, uint32_t *color)
  36 {
  37         uint16_t *pdata = rte_pktmbuf_mtod(m, uint16_t *);
  38
  39         *subport = (rte_be_to_cpu_16(pdata[SUBPORT_OFFSET]) & 0x0FFF) &
  40                         (port_params.n_subports_per_port - 1); /* Outer VLAN ID*/
  41         *pipe = (rte_be_to_cpu_16(pdata[PIPE_OFFSET]) & 0x0FFF) &
  42                         (port_params.n_pipes_per_subport - 1); /* Inner VLAN ID */
  43         *traffic_class = (pdata[QUEUE_OFFSET] & 0x0F) &
  44                         (RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE - 1); /* Destination IP */
  45         *queue = ((pdata[QUEUE_OFFSET] >> 8) & 0x0F) &
  46                         (RTE_SCHED_QUEUES_PER_TRAFFIC_CLASS - 1) ; /* Destination IP */
  47         *color = pdata[COLOR_OFFSET] & 0x03;    /* Destination IP */
  48
  49         return 0;
  50 }
  51
  52 void
  53 app_rx_thread(struct thread_conf **confs)
  54 {
  55         uint32_t i, nb_rx;
  56         struct rte_mbuf *rx_mbufs[burst_conf.rx_burst] __rte_cache_aligned;
  57         struct thread_conf *conf;
  58         int conf_idx = 0;
  59
  60         uint32_t subport;
  61         uint32_t pipe;
  62         uint32_t traffic_class;
  63         uint32_t queue;
  64         uint32_t color;
  65
  66         while ((conf = confs[conf_idx])) {
  67                 nb_rx = rte_eth_rx_burst(conf->rx_port, conf->rx_queue, rx_mbufs,
  68                                 burst_conf.rx_burst);
  69
  70                 if (likely(nb_rx != 0)) {
  71                         APP_STATS_ADD(conf->stat.nb_rx, nb_rx);
  72
  73                         for(i = 0; i < nb_rx; i++) {
  74                                 get_pkt_sched(rx_mbufs[i],
  75                                                 &subport, &pipe, &traffic_class, &queue, &color);
  76                                 rte_sched_port_pkt_write(rx_mbufs[i], subport, pipe,
  77                                                 traffic_class, queue, (enum rte_meter_color) color);
  78                         }
  79
  80                         if (unlikely(rte_ring_sp_enqueue_bulk(conf->rx_ring,
  81                                         (void **)rx_mbufs, nb_rx, NULL) == 0)) {
  82                                 for(i = 0; i < nb_rx; i++) {
  83                                         rte_pktmbuf_free(rx_mbufs[i]);
  84
  85                                         APP_STATS_ADD(conf->stat.nb_drop, 1);
  86                                 }
  87                         }
  88                 }
  89                 conf_idx++;
  90                 if (confs[conf_idx] == NULL)
  91                         conf_idx = 0;
  92         }
  93 }
  94
  95
  96
  97 /* Send the packet to an output interface
  98  * For performance reason function returns number of packets dropped, not sent,
  99  * so 0 means that all packets were sent successfully
 100  */
 101
 102 static inline void
 103 app_send_burst(struct thread_conf *qconf)
 104 {
 105         struct rte_mbuf **mbufs;
 106         uint32_t n, ret;
 107
 108         mbufs = (struct rte_mbuf **)qconf->m_table;
 109         n = qconf->n_mbufs;
 110
 111         do {
 112                 ret = rte_eth_tx_burst(qconf->tx_port, qconf->tx_queue, mbufs, (uint16_t)n);
 113                 /* we cannot drop the packets, so re-send */
 114                 /* update number of packets to be sent */
 115                 n -= ret;
 116                 mbufs = (struct rte_mbuf **)&mbufs[ret];
 117         } while (n);
 118 }
 119
 120
 121 /* Send the packet to an output interface */
 122 static void
 123 app_send_packets(struct thread_conf *qconf, struct rte_mbuf **mbufs, uint32_t nb_pkt)
 124 {
 125         uint32_t i, len;
 126
 127         len = qconf->n_mbufs;
 128         for(i = 0; i < nb_pkt; i++) {
 129                 qconf->m_table[len] = mbufs[i];
 130                 len++;
 131                 /* enough pkts to be sent */
 132                 if (unlikely(len == burst_conf.tx_burst)) {
 133                         qconf->n_mbufs = len;
 134                         app_send_burst(qconf);
 135                         len = 0;
 136                 }
 137         }
 138
 139         qconf->n_mbufs = len;
 140 }
 141
 142 void
 143 app_tx_thread(struct thread_conf **confs)
 144 {
 145         struct rte_mbuf *mbufs[burst_conf.qos_dequeue];
 146         struct thread_conf *conf;
 147         int conf_idx = 0;
 148         int retval;
 149         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 150
 151         while ((conf = confs[conf_idx])) {
 152                 retval = rte_ring_sc_dequeue_bulk(conf->tx_ring, (void **)mbufs,
 153                                         burst_conf.qos_dequeue, NULL);
 154                 if (likely(retval != 0)) {
 155                         app_send_packets(conf, mbufs, burst_conf.qos_dequeue);
 156
 157                         conf->counter = 0; /* reset empty read loop counter */
 158                 }
 159
 160                 conf->counter++;
 161
 162                 /* drain ring and TX queues */
 163                 if (unlikely(conf->counter > drain_tsc)) {
 164                         /* now check is there any packets left to be transmitted */
 165                         if (conf->n_mbufs != 0) {
 166                                 app_send_burst(conf);
 167
 168                                 conf->n_mbufs = 0;
 169                         }
 170                         conf->counter = 0;
 171                 }
 172
 173                 conf_idx++;
 174                 if (confs[conf_idx] == NULL)
 175                         conf_idx = 0;
 176         }
 177 }
 178
 179
 180 void
 181 app_worker_thread(struct thread_conf **confs)
 182 {
 183         struct rte_mbuf *mbufs[burst_conf.ring_burst];
 184         struct thread_conf *conf;
 185         int conf_idx = 0;
 186
 187         while ((conf = confs[conf_idx])) {
 188                 uint32_t nb_pkt;
 189
 190                 /* Read packet from the ring */
 191                 nb_pkt = rte_ring_sc_dequeue_burst(conf->rx_ring, (void **)mbufs,
 192                                         burst_conf.ring_burst, NULL);
 193                 if (likely(nb_pkt)) {
 194                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 195                                         nb_pkt);
 196
 197                         APP_STATS_ADD(conf->stat.nb_drop, nb_pkt - nb_sent);
 198                         APP_STATS_ADD(conf->stat.nb_rx, nb_pkt);
 199                 }
 200
 201                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 202                                         burst_conf.qos_dequeue);
 203                 if (likely(nb_pkt > 0))
 204                         while (rte_ring_sp_enqueue_bulk(conf->tx_ring,
 205                                         (void **)mbufs, nb_pkt, NULL) == 0)
 206                                 ; /* empty body */
 207
 208                 conf_idx++;
 209                 if (confs[conf_idx] == NULL)
 210                         conf_idx = 0;
 211         }
 212 }
 213
 214
 215 void
 216 app_mixed_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         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S * BURST_TX_DRAIN_US;
 222
 223         while ((conf = confs[conf_idx])) {
 224                 uint32_t nb_pkt;
 225
 226                 /* Read packet from the ring */
 227                 nb_pkt = rte_ring_sc_dequeue_burst(conf->rx_ring, (void **)mbufs,
 228                                         burst_conf.ring_burst, NULL);
 229                 if (likely(nb_pkt)) {
 230                         int nb_sent = rte_sched_port_enqueue(conf->sched_port, mbufs,
 231                                         nb_pkt);
 232
 233                         APP_STATS_ADD(conf->stat.nb_drop, nb_pkt - nb_sent);
 234                         APP_STATS_ADD(conf->stat.nb_rx, nb_pkt);
 235                 }
 236
 237
 238                 nb_pkt = rte_sched_port_dequeue(conf->sched_port, mbufs,
 239                                         burst_conf.qos_dequeue);
 240                 if (likely(nb_pkt > 0)) {
 241                         app_send_packets(conf, mbufs, nb_pkt);
 242
 243                         conf->counter = 0; /* reset empty read loop counter */
 244                 }
 245
 246                 conf->counter++;
 247
 248                 /* drain ring and TX queues */
 249                 if (unlikely(conf->counter > drain_tsc)) {
 250
 251                         /* now check is there any packets left to be transmitted */
 252                         if (conf->n_mbufs != 0) {
 253                                 app_send_burst(conf);
 254
 255                                 conf->n_mbufs = 0;
 256                         }
 257                         conf->counter = 0;
 258                 }
 259
 260                 conf_idx++;
 261                 if (confs[conf_idx] == NULL)
 262                         conf_idx = 0;
 263         }
 264 }