1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
11 * API for lcore and socket manipulation
14 #include <rte_config.h>
15 #include <rte_per_lcore.h>
17 #include <rte_launch.h>
23 #define LCORE_ID_ANY UINT32_MAX /**< Any lcore. */
25 RTE_DECLARE_PER_LCORE(unsigned, _lcore_id); /**< Per thread "lcore id". */
31 * The identifier of the lcore, which MUST be between 0 and RTE_MAX_LCORE-1.
33 * The role of the lcore.
35 enum rte_lcore_role_t rte_eal_lcore_role(unsigned int lcore_id);
38 * Return the Application thread ID of the execution unit.
40 * Note: in most cases the lcore id returned here will also correspond
41 * to the processor id of the CPU on which the thread is pinned, this
42 * will not be the case if the user has explicitly changed the thread to
43 * core affinities using --lcores EAL argument e.g. --lcores '(0-3)@10'
44 * to run threads with lcore IDs 0, 1, 2 and 3 on physical core 10..
47 * Logical core ID (in EAL thread) or LCORE_ID_ANY (in non-EAL thread)
49 static inline unsigned
52 return RTE_PER_LCORE(_lcore_id);
56 * Get the id of the master lcore
59 * the id of the master lcore
61 unsigned int rte_get_master_lcore(void);
64 * Return the number of execution units (lcores) on the system.
67 * the number of execution units (lcores) on the system.
69 unsigned int rte_lcore_count(void);
72 * Return the index of the lcore starting from zero.
74 * When option -c or -l is given, the index corresponds
75 * to the order in the list.
77 * -c 0x30, lcore 4 has index 0, and 5 has index 1.
78 * -l 22,18 lcore 22 has index 0, and 18 has index 1.
81 * The targeted lcore, or -1 for the current one.
83 * The relative index, or -1 if not enabled.
85 int rte_lcore_index(int lcore_id);
88 * Return the ID of the physical socket of the logical core we are
91 * the ID of current lcoreid's physical socket
93 unsigned int rte_socket_id(void);
96 * Return number of physical sockets detected on the system.
98 * Note that number of nodes may not be correspondent to their physical id's:
99 * for example, a system may report two socket id's, but the actual socket id's
103 * the number of physical sockets as recognized by EAL
106 rte_socket_count(void);
109 * Return socket id with a particular index.
111 * This will return socket id at a particular position in list of all detected
112 * physical socket id's. For example, on a machine with sockets [0, 8], passing
113 * 1 as a parameter will return 8.
116 * index of physical socket id to return
119 * - physical socket id as recognized by EAL
120 * - -1 on error, with errno set to EINVAL
123 rte_socket_id_by_idx(unsigned int idx);
126 * Get the ID of the physical socket of the specified lcore
129 * the targeted lcore, which MUST be between 0 and RTE_MAX_LCORE-1.
131 * the ID of lcoreid's physical socket
134 rte_lcore_to_socket_id(unsigned int lcore_id);
138 * @b EXPERIMENTAL: this API may change without prior notice.
140 * Return the id of the lcore on a socket starting from zero.
143 * The targeted lcore, or -1 for the current one.
145 * The relative index, or -1 if not enabled.
149 rte_lcore_to_cpu_id(int lcore_id);
153 * @b EXPERIMENTAL: this API may change without prior notice.
155 * Return the cpuset for a given lcore.
157 * the targeted lcore, which MUST be between 0 and RTE_MAX_LCORE-1.
159 * The cpuset of that lcore
163 rte_lcore_cpuset(unsigned int lcore_id);
166 * Test if an lcore is enabled.
169 * The identifier of the lcore, which MUST be between 0 and
172 * True if the given lcore is enabled; false otherwise.
174 int rte_lcore_is_enabled(unsigned int lcore_id);
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 unsigned int rte_get_next_lcore(unsigned int i, int skip_master, int wrap);
192 * Macro to browse all running lcores.
194 #define RTE_LCORE_FOREACH(i) \
195 for (i = rte_get_next_lcore(-1, 0, 0); \
197 i = rte_get_next_lcore(i, 0, 0))
200 * Macro to browse all running lcores except the master lcore.
202 #define RTE_LCORE_FOREACH_SLAVE(i) \
203 for (i = rte_get_next_lcore(-1, 1, 0); \
205 i = rte_get_next_lcore(i, 1, 0))
208 * Set core affinity of the current thread.
209 * Support both EAL and non-EAL thread and update TLS.
212 * Point to cpu_set_t for setting current thread affinity.
214 * On success, return 0; otherwise return -1;
216 int rte_thread_set_affinity(rte_cpuset_t *cpusetp);
219 * Get core affinity of the current thread.
222 * Point to cpu_set_t for getting current thread cpu affinity.
223 * It presumes input is not NULL, otherwise it causes panic.
226 void rte_thread_get_affinity(rte_cpuset_t *cpusetp);
231 * @note It fails with glibc < 2.12.
236 * Thread name to set.
238 * On success, return 0; otherwise return a negative value.
240 int rte_thread_setname(pthread_t id, const char *name);
245 * @note It fails with glibc < 2.12.
250 * Thread name to set.
252 * Thread name buffer length.
254 * On success, return 0; otherwise return a negative value.
257 int rte_thread_getname(pthread_t id, char *name, size_t len);
260 * Create a control thread.
262 * Wrapper to pthread_create(), pthread_setname_np() and
263 * pthread_setaffinity_np(). The affinity of the new thread is based
264 * on the CPU affinity retrieved at the time rte_eal_init() was called,
265 * the dataplane and service lcores are then excluded.
268 * Filled with the thread id of the new created thread.
270 * The name of the control thread (max 16 characters including '\0').
272 * Attributes for the new thread.
273 * @param start_routine
274 * Function to be executed by the new thread.
276 * Argument passed to start_routine.
278 * On success, returns 0; on error, it returns a negative value
279 * corresponding to the error number.
282 rte_ctrl_thread_create(pthread_t *thread, const char *name,
283 const pthread_attr_t *attr,
284 void *(*start_routine)(void *), void *arg);
287 * Test if the core supplied has a specific role
290 * The identifier of the lcore, which MUST be between 0 and
293 * The role to be checked against.
295 * Boolean value: positive if test is true; otherwise returns 0.
298 rte_lcore_has_role(unsigned int lcore_id, enum rte_lcore_role_t role);
305 #endif /* _RTE_LCORE_H_ */