ceph/src/dpdk/examples/multi_process/simple_mp/main.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  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
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * This sample application is a simple multi-process application which
  36  * demostrates sharing of queues and memory pools between processes, and
  37  * using those queues/pools for communication between the processes.
  38  *
  39  * Application is designed to run with two processes, a primary and a
  40  * secondary, and each accepts commands on the commandline, the most
  41  * important of which is "send", which just sends a string to the other
  42  * process.
  43  */
  44
  45 #include <stdio.h>
  46 #include <string.h>
  47 #include <stdint.h>
  48 #include <inttypes.h>
  49 #include <stdarg.h>
  50 #include <errno.h>
  51 #include <unistd.h>
  52 #include <termios.h>
  53 #include <sys/queue.h>
  54
  55 #include <rte_common.h>
  56 #include <rte_memory.h>
  57 #include <rte_memzone.h>
  58 #include <rte_launch.h>
  59 #include <rte_eal.h>
  60 #include <rte_per_lcore.h>
  61 #include <rte_lcore.h>
  62 #include <rte_debug.h>
  63 #include <rte_atomic.h>
  64 #include <rte_branch_prediction.h>
  65 #include <rte_ring.h>
  66 #include <rte_log.h>
  67 #include <rte_mempool.h>
  68 #include <cmdline_rdline.h>
  69 #include <cmdline_parse.h>
  70 #include <cmdline_socket.h>
  71 #include <cmdline.h>
  72 #include "mp_commands.h"
  73
  74 #define RTE_LOGTYPE_APP RTE_LOGTYPE_USER1
  75
  76 static const char *_MSG_POOL = "MSG_POOL";
  77 static const char *_SEC_2_PRI = "SEC_2_PRI";
  78 static const char *_PRI_2_SEC = "PRI_2_SEC";
  79 const unsigned string_size = 64;
  80
  81 struct rte_ring *send_ring, *recv_ring;
  82 struct rte_mempool *message_pool;
  83 volatile int quit = 0;
  84
  85 static int
  86 lcore_recv(__attribute__((unused)) void *arg)
  87 {
  88         unsigned lcore_id = rte_lcore_id();
  89
  90         printf("Starting core %u\n", lcore_id);
  91         while (!quit){
  92                 void *msg;
  93                 if (rte_ring_dequeue(recv_ring, &msg) < 0){
  94                         usleep(5);
  95                         continue;
  96                 }
  97                 printf("core %u: Received '%s'\n", lcore_id, (char *)msg);
  98                 rte_mempool_put(message_pool, msg);
  99         }
 100
 101         return 0;
 102 }
 103
 104 int
 105 main(int argc, char **argv)
 106 {
 107         const unsigned flags = 0;
 108         const unsigned ring_size = 64;
 109         const unsigned pool_size = 1024;
 110         const unsigned pool_cache = 32;
 111         const unsigned priv_data_sz = 0;
 112
 113         int ret;
 114         unsigned lcore_id;
 115
 116         ret = rte_eal_init(argc, argv);
 117         if (ret < 0)
 118                 rte_exit(EXIT_FAILURE, "Cannot init EAL\n");
 119
 120         if (rte_eal_process_type() == RTE_PROC_PRIMARY){
 121                 send_ring = rte_ring_create(_PRI_2_SEC, ring_size, rte_socket_id(), flags);
 122                 recv_ring = rte_ring_create(_SEC_2_PRI, ring_size, rte_socket_id(), flags);
 123                 message_pool = rte_mempool_create(_MSG_POOL, pool_size,
 124                                 string_size, pool_cache, priv_data_sz,
 125                                 NULL, NULL, NULL, NULL,
 126                                 rte_socket_id(), flags);
 127         } else {
 128                 recv_ring = rte_ring_lookup(_PRI_2_SEC);
 129                 send_ring = rte_ring_lookup(_SEC_2_PRI);
 130                 message_pool = rte_mempool_lookup(_MSG_POOL);
 131         }
 132         if (send_ring == NULL)
 133                 rte_exit(EXIT_FAILURE, "Problem getting sending ring\n");
 134         if (recv_ring == NULL)
 135                 rte_exit(EXIT_FAILURE, "Problem getting receiving ring\n");
 136         if (message_pool == NULL)
 137                 rte_exit(EXIT_FAILURE, "Problem getting message pool\n");
 138
 139         RTE_LOG(INFO, APP, "Finished Process Init.\n");
 140
 141         /* call lcore_recv() on every slave lcore */
 142         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 143                 rte_eal_remote_launch(lcore_recv, NULL, lcore_id);
 144         }
 145
 146         /* call cmd prompt on master lcore */
 147         struct cmdline *cl = cmdline_stdin_new(simple_mp_ctx, "\nsimple_mp > ");
 148         if (cl == NULL)
 149                 rte_exit(EXIT_FAILURE, "Cannot create cmdline instance\n");
 150         cmdline_interact(cl);
 151         cmdline_stdin_exit(cl);
 152
 153         rte_eal_mp_wait_lcore();
 154         return 0;
 155 }