app/test-eventdev/test_perf_queue.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2017 Cavium, Inc
   3  */
   4
   5 #include "test_perf_common.h"
   6
   7 /* See http://dpdk.org/doc/guides/tools/testeventdev.html for test details */
   8
   9 static inline int
  10 perf_queue_nb_event_queues(struct evt_options *opt)
  11 {
  12         /* nb_queues = number of producers * number of stages */
  13         return evt_nr_active_lcores(opt->plcores) * opt->nb_stages;
  14 }
  15
  16 static inline __attribute__((always_inline)) void
  17 mark_fwd_latency(struct rte_event *const ev,
  18                 const uint8_t nb_stages)
  19 {
  20         if (unlikely((ev->queue_id % nb_stages) == 0)) {
  21                 struct perf_elt *const m = ev->event_ptr;
  22
  23                 m->timestamp = rte_get_timer_cycles();
  24         }
  25 }
  26
  27 static inline __attribute__((always_inline)) void
  28 fwd_event(struct rte_event *const ev, uint8_t *const sched_type_list,
  29                 const uint8_t nb_stages)
  30 {
  31         ev->queue_id++;
  32         ev->sched_type = sched_type_list[ev->queue_id % nb_stages];
  33         ev->op = RTE_EVENT_OP_FORWARD;
  34         ev->event_type = RTE_EVENT_TYPE_CPU;
  35 }
  36
  37 static int
  38 perf_queue_worker(void *arg, const int enable_fwd_latency)
  39 {
  40         PERF_WORKER_INIT;
  41         struct rte_event ev;
  42
  43         while (t->done == false) {
  44                 uint16_t event = rte_event_dequeue_burst(dev, port, &ev, 1, 0);
  45
  46                 if (!event) {
  47                         rte_pause();
  48                         continue;
  49                 }
  50                 if (enable_fwd_latency)
  51                 /* first q in pipeline, mark timestamp to compute fwd latency */
  52                         mark_fwd_latency(&ev, nb_stages);
  53
  54                 /* last stage in pipeline */
  55                 if (unlikely((ev.queue_id % nb_stages) == laststage)) {
  56                         if (enable_fwd_latency)
  57                                 cnt = perf_process_last_stage_latency(pool,
  58                                         &ev, w, bufs, sz, cnt);
  59                         else
  60                                 cnt = perf_process_last_stage(pool,
  61                                         &ev, w, bufs, sz, cnt);
  62                 } else {
  63                         fwd_event(&ev, sched_type_list, nb_stages);
  64                         while (rte_event_enqueue_burst(dev, port, &ev, 1) != 1)
  65                                 rte_pause();
  66                 }
  67         }
  68         return 0;
  69 }
  70
  71 static int
  72 perf_queue_worker_burst(void *arg, const int enable_fwd_latency)
  73 {
  74         PERF_WORKER_INIT;
  75         uint16_t i;
  76         /* +1 to avoid prefetch out of array check */
  77         struct rte_event ev[BURST_SIZE + 1];
  78
  79         while (t->done == false) {
  80                 uint16_t const nb_rx = rte_event_dequeue_burst(dev, port, ev,
  81                                 BURST_SIZE, 0);
  82
  83                 if (!nb_rx) {
  84                         rte_pause();
  85                         continue;
  86                 }
  87
  88                 for (i = 0; i < nb_rx; i++) {
  89                         if (enable_fwd_latency) {
  90                                 rte_prefetch0(ev[i+1].event_ptr);
  91                                 /* first queue in pipeline.
  92                                  * mark time stamp to compute fwd latency
  93                                  */
  94                                 mark_fwd_latency(&ev[i], nb_stages);
  95                         }
  96                         /* last stage in pipeline */
  97                         if (unlikely((ev[i].queue_id % nb_stages) ==
  98                                                  laststage)) {
  99                                 if (enable_fwd_latency)
 100                                         cnt = perf_process_last_stage_latency(
 101                                                 pool, &ev[i], w, bufs, sz, cnt);
 102                                 else
 103                                         cnt = perf_process_last_stage(pool,
 104                                                 &ev[i], w, bufs, sz, cnt);
 105
 106                                 ev[i].op = RTE_EVENT_OP_RELEASE;
 107                         } else {
 108                                 fwd_event(&ev[i], sched_type_list, nb_stages);
 109                         }
 110                 }
 111
 112                 uint16_t enq;
 113
 114                 enq = rte_event_enqueue_burst(dev, port, ev, nb_rx);
 115                 while (enq < nb_rx) {
 116                         enq += rte_event_enqueue_burst(dev, port,
 117                                                         ev + enq, nb_rx - enq);
 118                 }
 119         }
 120         return 0;
 121 }
 122
 123 static int
 124 worker_wrapper(void *arg)
 125 {
 126         struct worker_data *w  = arg;
 127         struct evt_options *opt = w->t->opt;
 128
 129         const bool burst = evt_has_burst_mode(w->dev_id);
 130         const int fwd_latency = opt->fwd_latency;
 131
 132         /* allow compiler to optimize */
 133         if (!burst && !fwd_latency)
 134                 return perf_queue_worker(arg, 0);
 135         else if (!burst && fwd_latency)
 136                 return perf_queue_worker(arg, 1);
 137         else if (burst && !fwd_latency)
 138                 return perf_queue_worker_burst(arg, 0);
 139         else if (burst && fwd_latency)
 140                 return perf_queue_worker_burst(arg, 1);
 141
 142         rte_panic("invalid worker\n");
 143 }
 144
 145 static int
 146 perf_queue_launch_lcores(struct evt_test *test, struct evt_options *opt)
 147 {
 148         return perf_launch_lcores(test, opt, worker_wrapper);
 149 }
 150
 151 static int
 152 perf_queue_eventdev_setup(struct evt_test *test, struct evt_options *opt)
 153 {
 154         uint8_t queue;
 155         int nb_stages = opt->nb_stages;
 156         int ret;
 157
 158         const struct rte_event_dev_config config = {
 159                         .nb_event_queues = perf_queue_nb_event_queues(opt),
 160                         .nb_event_ports = perf_nb_event_ports(opt),
 161                         .nb_events_limit  = 4096,
 162                         .nb_event_queue_flows = opt->nb_flows,
 163                         .nb_event_port_dequeue_depth = 128,
 164                         .nb_event_port_enqueue_depth = 128,
 165         };
 166
 167         ret = rte_event_dev_configure(opt->dev_id, &config);
 168         if (ret) {
 169                 evt_err("failed to configure eventdev %d", opt->dev_id);
 170                 return ret;
 171         }
 172
 173         struct rte_event_queue_conf q_conf = {
 174                         .priority = RTE_EVENT_DEV_PRIORITY_NORMAL,
 175                         .nb_atomic_flows = opt->nb_flows,
 176                         .nb_atomic_order_sequences = opt->nb_flows,
 177         };
 178         /* queue configurations */
 179         for (queue = 0; queue < perf_queue_nb_event_queues(opt); queue++) {
 180                 q_conf.schedule_type =
 181                         (opt->sched_type_list[queue % nb_stages]);
 182
 183                 if (opt->q_priority) {
 184                         uint8_t stage_pos = queue % nb_stages;
 185                         /* Configure event queues(stage 0 to stage n) with
 186                          * RTE_EVENT_DEV_PRIORITY_LOWEST to
 187                          * RTE_EVENT_DEV_PRIORITY_HIGHEST.
 188                          */
 189                         uint8_t step = RTE_EVENT_DEV_PRIORITY_LOWEST /
 190                                         (nb_stages - 1);
 191                         /* Higher prio for the queues closer to last stage */
 192                         q_conf.priority = RTE_EVENT_DEV_PRIORITY_LOWEST -
 193                                         (step * stage_pos);
 194                 }
 195                 ret = rte_event_queue_setup(opt->dev_id, queue, &q_conf);
 196                 if (ret) {
 197                         evt_err("failed to setup queue=%d", queue);
 198                         return ret;
 199                 }
 200         }
 201
 202         ret = perf_event_dev_port_setup(test, opt, nb_stages /* stride */,
 203                                         perf_queue_nb_event_queues(opt));
 204         if (ret)
 205                 return ret;
 206
 207         ret = evt_service_setup(opt->dev_id);
 208         if (ret) {
 209                 evt_err("No service lcore found to run event dev.");
 210                 return ret;
 211         }
 212
 213         ret = rte_event_dev_start(opt->dev_id);
 214         if (ret) {
 215                 evt_err("failed to start eventdev %d", opt->dev_id);
 216                 return ret;
 217         }
 218
 219         return 0;
 220 }
 221
 222 static void
 223 perf_queue_opt_dump(struct evt_options *opt)
 224 {
 225         evt_dump_fwd_latency(opt);
 226         perf_opt_dump(opt, perf_queue_nb_event_queues(opt));
 227 }
 228
 229 static int
 230 perf_queue_opt_check(struct evt_options *opt)
 231 {
 232         return perf_opt_check(opt, perf_queue_nb_event_queues(opt));
 233 }
 234
 235 static bool
 236 perf_queue_capability_check(struct evt_options *opt)
 237 {
 238         struct rte_event_dev_info dev_info;
 239
 240         rte_event_dev_info_get(opt->dev_id, &dev_info);
 241         if (dev_info.max_event_queues < perf_queue_nb_event_queues(opt) ||
 242                         dev_info.max_event_ports < perf_nb_event_ports(opt)) {
 243                 evt_err("not enough eventdev queues=%d/%d or ports=%d/%d",
 244                         perf_queue_nb_event_queues(opt),
 245                         dev_info.max_event_queues,
 246                         perf_nb_event_ports(opt), dev_info.max_event_ports);
 247         }
 248
 249         return true;
 250 }
 251
 252 static const struct evt_test_ops perf_queue =  {
 253         .cap_check          = perf_queue_capability_check,
 254         .opt_check          = perf_queue_opt_check,
 255         .opt_dump           = perf_queue_opt_dump,
 256         .test_setup         = perf_test_setup,
 257         .mempool_setup      = perf_mempool_setup,
 258         .eventdev_setup     = perf_queue_eventdev_setup,
 259         .launch_lcores      = perf_queue_launch_lcores,
 260         .eventdev_destroy   = perf_eventdev_destroy,
 261         .mempool_destroy    = perf_mempool_destroy,
 262         .test_result        = perf_test_result,
 263         .test_destroy       = perf_test_destroy,
 264 };
 265
 266 EVT_TEST_REGISTER(perf_queue);