ceph/src/seastar/dpdk/test/test/test_per_lcore.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 #include <stdio.h>
  35 #include <stdint.h>
  36 #include <sys/queue.h>
  37
  38 #include <rte_common.h>
  39 #include <rte_memory.h>
  40 #include <rte_memzone.h>
  41 #include <rte_per_lcore.h>
  42 #include <rte_launch.h>
  43 #include <rte_eal.h>
  44 #include <rte_per_lcore.h>
  45 #include <rte_lcore.h>
  46 #include <rte_cycles.h>
  47
  48 #include "test.h"
  49
  50 /*
  51  * Per-lcore variables and lcore launch
  52  * ====================================
  53  *
  54  * - Use ``rte_eal_mp_remote_launch()`` to call ``assign_vars()`` on
  55  *   every available lcore. In this function, a per-lcore variable is
  56  *   assigned to the lcore_id.
  57  *
  58  * - Use ``rte_eal_mp_remote_launch()`` to call ``display_vars()`` on
  59  *   every available lcore. The function checks that the variable is
  60  *   correctly set, or returns -1.
  61  *
  62  * - If at least one per-core variable was not correct, the test function
  63  *   returns -1.
  64  */
  65
  66 static RTE_DEFINE_PER_LCORE(unsigned, test) = 0x12345678;
  67
  68 static int
  69 assign_vars(__attribute__((unused)) void *arg)
  70 {
  71         if (RTE_PER_LCORE(test) != 0x12345678)
  72                 return -1;
  73         RTE_PER_LCORE(test) = rte_lcore_id();
  74         return 0;
  75 }
  76
  77 static int
  78 display_vars(__attribute__((unused)) void *arg)
  79 {
  80         unsigned lcore_id = rte_lcore_id();
  81         unsigned var = RTE_PER_LCORE(test);
  82         unsigned socket_id = rte_lcore_to_socket_id(lcore_id);
  83
  84         printf("on socket %u, on core %u, variable is %u\n", socket_id, lcore_id, var);
  85         if (lcore_id != var)
  86                 return -1;
  87
  88         RTE_PER_LCORE(test) = 0x12345678;
  89         return 0;
  90 }
  91
  92 static int
  93 test_per_lcore_delay(__attribute__((unused)) void *arg)
  94 {
  95         rte_delay_ms(100);
  96         printf("wait 100ms on lcore %u\n", rte_lcore_id());
  97
  98         return 0;
  99 }
 100
 101 static int
 102 test_per_lcore(void)
 103 {
 104         unsigned lcore_id;
 105         int ret;
 106
 107         rte_eal_mp_remote_launch(assign_vars, NULL, SKIP_MASTER);
 108         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 109                 if (rte_eal_wait_lcore(lcore_id) < 0)
 110                         return -1;
 111         }
 112
 113         rte_eal_mp_remote_launch(display_vars, NULL, SKIP_MASTER);
 114         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 115                 if (rte_eal_wait_lcore(lcore_id) < 0)
 116                         return -1;
 117         }
 118
 119         /* test if it could do remote launch twice at the same time or not */
 120         ret = rte_eal_mp_remote_launch(test_per_lcore_delay, NULL, SKIP_MASTER);
 121         if (ret < 0) {
 122                 printf("It fails to do remote launch but it should able to do\n");
 123                 return -1;
 124         }
 125         /* it should not be able to launch a lcore which is running */
 126         ret = rte_eal_mp_remote_launch(test_per_lcore_delay, NULL, SKIP_MASTER);
 127         if (ret == 0) {
 128                 printf("It does remote launch successfully but it should not at this time\n");
 129                 return -1;
 130         }
 131         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
 132                 if (rte_eal_wait_lcore(lcore_id) < 0)
 133                         return -1;
 134         }
 135
 136         return 0;
 137 }
 138
 139 REGISTER_TEST_COMMAND(per_lcore_autotest, test_per_lcore);