ceph/src/seastar/dpdk/lib/librte_eal/common/eal_thread.h

   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 #ifndef EAL_THREAD_H
  35 #define EAL_THREAD_H
  36
  37 #include <rte_lcore.h>
  38
  39 /**
  40  * basic loop of thread, called for each thread by eal_init().
  41  *
  42  * @param arg
  43  *   opaque pointer
  44  */
  45 __attribute__((noreturn)) void *eal_thread_loop(void *arg);
  46
  47 /**
  48  * Init per-lcore info for master thread
  49  *
  50  * @param lcore_id
  51  *   identifier of master lcore
  52  */
  53 void eal_thread_init_master(unsigned lcore_id);
  54
  55 /**
  56  * Get the NUMA socket id from cpu id.
  57  * This function is private to EAL.
  58  *
  59  * @param cpu_id
  60  *   The logical process id.
  61  * @return
  62  *   socket_id or SOCKET_ID_ANY
  63  */
  64 unsigned eal_cpu_socket_id(unsigned cpu_id);
  65
  66 /**
  67  * Get the NUMA socket id from cpuset.
  68  * This function is private to EAL.
  69  *
  70  * @param cpusetp
  71  *   The point to a valid cpu set.
  72  * @return
  73  *   socket_id or SOCKET_ID_ANY
  74  */
  75 int eal_cpuset_socket_id(rte_cpuset_t *cpusetp);
  76
  77 /**
  78  * Default buffer size to use with eal_thread_dump_affinity()
  79  */
  80 #define RTE_CPU_AFFINITY_STR_LEN            256
  81
  82 /**
  83  * Dump the current pthread cpuset.
  84  * This function is private to EAL.
  85  *
  86  * Note:
  87  *   If the dump size is greater than the size of given buffer,
  88  *   the string will be truncated and with '\0' at the end.
  89  *
  90  * @param str
  91  *   The string buffer the cpuset will dump to.
  92  * @param size
  93  *   The string buffer size.
  94  * @return
  95  *   0 for success, -1 if truncation happens.
  96  */
  97 int
  98 eal_thread_dump_affinity(char *str, unsigned size);
  99
 100 #endif /* EAL_THREAD_H */