app/test-eventdev/test_perf_queue.c

   1 /*
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (C) Cavium, Inc 2017.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in
  14  *       the documentation and/or other materials provided with the
  15  *       distribution.
  16  *     * Neither the name of Cavium, Inc nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include "test_perf_common.h"
  34
  35 /* See http://dpdk.org/doc/guides/tools/testeventdev.html for test details */
  36
  37 static inline int
  38 perf_queue_nb_event_queues(struct evt_options *opt)
  39 {
  40         /* nb_queues = number of producers * number of stages */
  41         return evt_nr_active_lcores(opt->plcores) * opt->nb_stages;
  42 }
  43
  44 static inline __attribute__((always_inline)) void
  45 mark_fwd_latency(struct rte_event *const ev,
  46                 const uint8_t nb_stages)
  47 {
  48         if (unlikely((ev->queue_id % nb_stages) == 0)) {
  49                 struct perf_elt *const m = ev->event_ptr;
  50
  51                 m->timestamp = rte_get_timer_cycles();
  52         }
  53 }
  54
  55 static inline __attribute__((always_inline)) void
  56 fwd_event(struct rte_event *const ev, uint8_t *const sched_type_list,
  57                 const uint8_t nb_stages)
  58 {
  59         ev->queue_id++;
  60         ev->sched_type = sched_type_list[ev->queue_id % nb_stages];
  61         ev->op = RTE_EVENT_OP_FORWARD;
  62         ev->event_type = RTE_EVENT_TYPE_CPU;
  63 }
  64
  65 static int
  66 perf_queue_worker(void *arg, const int enable_fwd_latency)
  67 {
  68         PERF_WORKER_INIT;
  69         struct rte_event ev;
  70
  71         while (t->done == false) {
  72                 uint16_t event = rte_event_dequeue_burst(dev, port, &ev, 1, 0);
  73
  74                 if (!event) {
  75                         rte_pause();
  76                         continue;
  77                 }
  78                 if (enable_fwd_latency)
  79                 /* first q in pipeline, mark timestamp to compute fwd latency */
  80                         mark_fwd_latency(&ev, nb_stages);
  81
  82                 /* last stage in pipeline */
  83                 if (unlikely((ev.queue_id % nb_stages) == laststage)) {
  84                         if (enable_fwd_latency)
  85                                 cnt = perf_process_last_stage_latency(pool,
  86                                         &ev, w, bufs, sz, cnt);
  87                         else
  88                                 cnt = perf_process_last_stage(pool,
  89                                         &ev, w, bufs, sz, cnt);
  90                 } else {
  91                         fwd_event(&ev, sched_type_list, nb_stages);
  92                         while (rte_event_enqueue_burst(dev, port, &ev, 1) != 1)
  93                                 rte_pause();
  94                 }
  95         }
  96         return 0;
  97 }
  98
  99 static int
 100 perf_queue_worker_burst(void *arg, const int enable_fwd_latency)
 101 {
 102         PERF_WORKER_INIT;
 103         uint16_t i;
 104         /* +1 to avoid prefetch out of array check */
 105         struct rte_event ev[BURST_SIZE + 1];
 106
 107         while (t->done == false) {
 108                 uint16_t const nb_rx = rte_event_dequeue_burst(dev, port, ev,
 109                                 BURST_SIZE, 0);
 110
 111                 if (!nb_rx) {
 112                         rte_pause();
 113                         continue;
 114                 }
 115
 116                 for (i = 0; i < nb_rx; i++) {
 117                         if (enable_fwd_latency) {
 118                                 rte_prefetch0(ev[i+1].event_ptr);
 119                                 /* first queue in pipeline.
 120                                  * mark time stamp to compute fwd latency
 121                                  */
 122                                 mark_fwd_latency(&ev[i], nb_stages);
 123                         }
 124                         /* last stage in pipeline */
 125                         if (unlikely((ev[i].queue_id % nb_stages) ==
 126                                                  laststage)) {
 127                                 if (enable_fwd_latency)
 128                                         cnt = perf_process_last_stage_latency(
 129                                                 pool, &ev[i], w, bufs, sz, cnt);
 130                                 else
 131                                         cnt = perf_process_last_stage(pool,
 132                                                 &ev[i], w, bufs, sz, cnt);
 133
 134                                 ev[i].op = RTE_EVENT_OP_RELEASE;
 135                         } else {
 136                                 fwd_event(&ev[i], sched_type_list, nb_stages);
 137                         }
 138                 }
 139
 140                 uint16_t enq;
 141
 142                 enq = rte_event_enqueue_burst(dev, port, ev, nb_rx);
 143                 while (enq < nb_rx) {
 144                         enq += rte_event_enqueue_burst(dev, port,
 145                                                         ev + enq, nb_rx - enq);
 146                 }
 147         }
 148         return 0;
 149 }
 150
 151 static int
 152 worker_wrapper(void *arg)
 153 {
 154         struct worker_data *w  = arg;
 155         struct evt_options *opt = w->t->opt;
 156
 157         const bool burst = evt_has_burst_mode(w->dev_id);
 158         const int fwd_latency = opt->fwd_latency;
 159
 160         /* allow compiler to optimize */
 161         if (!burst && !fwd_latency)
 162                 return perf_queue_worker(arg, 0);
 163         else if (!burst && fwd_latency)
 164                 return perf_queue_worker(arg, 1);
 165         else if (burst && !fwd_latency)
 166                 return perf_queue_worker_burst(arg, 0);
 167         else if (burst && fwd_latency)
 168                 return perf_queue_worker_burst(arg, 1);
 169
 170         rte_panic("invalid worker\n");
 171 }
 172
 173 static int
 174 perf_queue_launch_lcores(struct evt_test *test, struct evt_options *opt)
 175 {
 176         return perf_launch_lcores(test, opt, worker_wrapper);
 177 }
 178
 179 static int
 180 perf_queue_eventdev_setup(struct evt_test *test, struct evt_options *opt)
 181 {
 182         uint8_t queue;
 183         int nb_stages = opt->nb_stages;
 184         int ret;
 185
 186         const struct rte_event_dev_config config = {
 187                         .nb_event_queues = perf_queue_nb_event_queues(opt),
 188                         .nb_event_ports = perf_nb_event_ports(opt),
 189                         .nb_events_limit  = 4096,
 190                         .nb_event_queue_flows = opt->nb_flows,
 191                         .nb_event_port_dequeue_depth = 128,
 192                         .nb_event_port_enqueue_depth = 128,
 193         };
 194
 195         ret = rte_event_dev_configure(opt->dev_id, &config);
 196         if (ret) {
 197                 evt_err("failed to configure eventdev %d", opt->dev_id);
 198                 return ret;
 199         }
 200
 201         struct rte_event_queue_conf q_conf = {
 202                         .priority = RTE_EVENT_DEV_PRIORITY_NORMAL,
 203                         .nb_atomic_flows = opt->nb_flows,
 204                         .nb_atomic_order_sequences = opt->nb_flows,
 205         };
 206         /* queue configurations */
 207         for (queue = 0; queue < perf_queue_nb_event_queues(opt); queue++) {
 208                 q_conf.schedule_type =
 209                         (opt->sched_type_list[queue % nb_stages]);
 210
 211                 if (opt->q_priority) {
 212                         uint8_t stage_pos = queue % nb_stages;
 213                         /* Configure event queues(stage 0 to stage n) with
 214                          * RTE_EVENT_DEV_PRIORITY_LOWEST to
 215                          * RTE_EVENT_DEV_PRIORITY_HIGHEST.
 216                          */
 217                         uint8_t step = RTE_EVENT_DEV_PRIORITY_LOWEST /
 218                                         (nb_stages - 1);
 219                         /* Higher prio for the queues closer to last stage */
 220                         q_conf.priority = RTE_EVENT_DEV_PRIORITY_LOWEST -
 221                                         (step * stage_pos);
 222                 }
 223                 ret = rte_event_queue_setup(opt->dev_id, queue, &q_conf);
 224                 if (ret) {
 225                         evt_err("failed to setup queue=%d", queue);
 226                         return ret;
 227                 }
 228         }
 229
 230         ret = perf_event_dev_port_setup(test, opt, nb_stages /* stride */,
 231                                         perf_queue_nb_event_queues(opt));
 232         if (ret)
 233                 return ret;
 234
 235         ret = evt_service_setup(opt->dev_id);
 236         if (ret) {
 237                 evt_err("No service lcore found to run event dev.");
 238                 return ret;
 239         }
 240
 241         ret = rte_event_dev_start(opt->dev_id);
 242         if (ret) {
 243                 evt_err("failed to start eventdev %d", opt->dev_id);
 244                 return ret;
 245         }
 246
 247         return 0;
 248 }
 249
 250 static void
 251 perf_queue_opt_dump(struct evt_options *opt)
 252 {
 253         evt_dump_fwd_latency(opt);
 254         perf_opt_dump(opt, perf_queue_nb_event_queues(opt));
 255 }
 256
 257 static int
 258 perf_queue_opt_check(struct evt_options *opt)
 259 {
 260         return perf_opt_check(opt, perf_queue_nb_event_queues(opt));
 261 }
 262
 263 static bool
 264 perf_queue_capability_check(struct evt_options *opt)
 265 {
 266         struct rte_event_dev_info dev_info;
 267
 268         rte_event_dev_info_get(opt->dev_id, &dev_info);
 269         if (dev_info.max_event_queues < perf_queue_nb_event_queues(opt) ||
 270                         dev_info.max_event_ports < perf_nb_event_ports(opt)) {
 271                 evt_err("not enough eventdev queues=%d/%d or ports=%d/%d",
 272                         perf_queue_nb_event_queues(opt),
 273                         dev_info.max_event_queues,
 274                         perf_nb_event_ports(opt), dev_info.max_event_ports);
 275         }
 276
 277         return true;
 278 }
 279
 280 static const struct evt_test_ops perf_queue =  {
 281         .cap_check          = perf_queue_capability_check,
 282         .opt_check          = perf_queue_opt_check,
 283         .opt_dump           = perf_queue_opt_dump,
 284         .test_setup         = perf_test_setup,
 285         .mempool_setup      = perf_mempool_setup,
 286         .eventdev_setup     = perf_queue_eventdev_setup,
 287         .launch_lcores      = perf_queue_launch_lcores,
 288         .eventdev_destroy   = perf_eventdev_destroy,
 289         .mempool_destroy    = perf_mempool_destroy,
 290         .test_result        = perf_test_result,
 291         .test_destroy       = perf_test_destroy,
 292 };
 293
 294 EVT_TEST_REGISTER(perf_queue);