4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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.
40 * API for lcore and socket manipulation
43 #include <rte_per_lcore.h>
45 #include <rte_launch.h>
51 #define LCORE_ID_ANY -1 /**< Any lcore. */
54 * Structure storing internal configuration (per-lcore)
57 unsigned detected; /**< true if lcore was detected */
58 pthread_t thread_id; /**< pthread identifier */
59 int pipe_master2slave[2]; /**< communication pipe with master */
60 int pipe_slave2master[2]; /**< communication pipe with master */
61 lcore_function_t * volatile f; /**< function to call */
62 void * volatile arg; /**< argument of function */
63 volatile int ret; /**< return value of function */
64 volatile enum rte_lcore_state_t state; /**< lcore state */
65 unsigned socket_id; /**< physical socket id for this lcore */
66 unsigned core_id; /**< core number on socket for this lcore */
67 int core_index; /**< relative index, starting from 0 */
71 * Internal configuration (per-lcore)
73 extern struct lcore_config lcore_config[RTE_MAX_LCORE];
75 RTE_DECLARE_PER_LCORE(unsigned, _lcore_id); /**< Per core "core id". */
78 * Return the ID of the execution unit we are running on.
82 static inline unsigned
85 return RTE_PER_LCORE(_lcore_id);
89 * Get the id of the master lcore
92 * the id of the master lcore
94 static inline unsigned
95 rte_get_master_lcore(void)
97 return rte_eal_get_configuration()->master_lcore;
101 * Return the number of execution units (lcores) on the system.
104 * the number of execution units (lcores) on the system.
106 static inline unsigned
107 rte_lcore_count(void)
109 const struct rte_config *cfg = rte_eal_get_configuration();
110 return cfg->lcore_count;
114 * Return the index of the lcore starting from zero.
115 * The order is physical or given by command line (-l option).
118 * The targeted lcore, or -1 for the current one.
120 * The relative index, or -1 if not enabled.
123 rte_lcore_index(int lcore_id)
125 if (lcore_id >= RTE_MAX_LCORE)
128 lcore_id = rte_lcore_id();
129 return lcore_config[lcore_id].core_index;
133 * Return the ID of the physical socket of the logical core we are
136 * the ID of current lcoreid's physical socket
138 static inline unsigned
141 return lcore_config[rte_lcore_id()].socket_id;
145 * Get the ID of the physical socket of the specified lcore
148 * the targeted lcore, which MUST be between 0 and RTE_MAX_LCORE-1.
150 * the ID of lcoreid's physical socket
152 static inline unsigned
153 rte_lcore_to_socket_id(unsigned lcore_id)
155 return lcore_config[lcore_id].socket_id;
159 * Test if an lcore is enabled.
162 * The identifier of the lcore, which MUST be between 0 and
165 * True if the given lcore is enabled; false otherwise.
168 rte_lcore_is_enabled(unsigned lcore_id)
170 struct rte_config *cfg = rte_eal_get_configuration();
171 if (lcore_id >= RTE_MAX_LCORE)
173 return (cfg->lcore_role[lcore_id] != ROLE_OFF);
177 * Get the next enabled lcore ID.
180 * The current lcore (reference).
182 * If true, do not return the ID of the master lcore.
184 * If true, go back to 0 when RTE_MAX_LCORE is reached; otherwise,
185 * return RTE_MAX_LCORE.
187 * The next lcore_id or RTE_MAX_LCORE if not found.
189 static inline unsigned
190 rte_get_next_lcore(unsigned i, int skip_master, int wrap)
196 while (i < RTE_MAX_LCORE) {
197 if (!rte_lcore_is_enabled(i) ||
198 (skip_master && (i == rte_get_master_lcore()))) {
209 * Macro to browse all running lcores.
211 #define RTE_LCORE_FOREACH(i) \
212 for (i = rte_get_next_lcore(-1, 0, 0); \
214 i = rte_get_next_lcore(i, 0, 0))
217 * Macro to browse all running lcores except the master lcore.
219 #define RTE_LCORE_FOREACH_SLAVE(i) \
220 for (i = rte_get_next_lcore(-1, 1, 0); \
222 i = rte_get_next_lcore(i, 1, 0))
229 #endif /* _RTE_LCORE_H_ */