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". */
28 * The lcore role (used in RTE or not).
30 enum rte_lcore_role_t {
40 * The identifier of the lcore, which MUST be between 0 and RTE_MAX_LCORE-1.
42 * The role of the lcore.
44 enum rte_lcore_role_t rte_eal_lcore_role(unsigned int lcore_id);
47 * Test if the core supplied has a specific role
50 * The identifier of the lcore, which MUST be between 0 and
53 * The role to be checked against.
55 * Boolean value: positive if test is true; otherwise returns 0.
58 rte_lcore_has_role(unsigned int lcore_id, enum rte_lcore_role_t role);
61 * Return the Application thread ID of the execution unit.
63 * Note: in most cases the lcore id returned here will also correspond
64 * to the processor id of the CPU on which the thread is pinned, this
65 * will not be the case if the user has explicitly changed the thread to
66 * core affinities using --lcores EAL argument e.g. --lcores '(0-3)@10'
67 * to run threads with lcore IDs 0, 1, 2 and 3 on physical core 10..
70 * Logical core ID (in EAL thread) or LCORE_ID_ANY (in non-EAL thread)
72 static inline unsigned
75 return RTE_PER_LCORE(_lcore_id);
79 * Get the id of the master lcore
82 * the id of the master lcore
84 unsigned int rte_get_master_lcore(void);
87 * Return the number of execution units (lcores) on the system.
90 * the number of execution units (lcores) on the system.
92 unsigned int rte_lcore_count(void);
95 * Return the index of the lcore starting from zero.
97 * When option -c or -l is given, the index corresponds
98 * to the order in the list.
100 * -c 0x30, lcore 4 has index 0, and 5 has index 1.
101 * -l 22,18 lcore 22 has index 0, and 18 has index 1.
104 * The targeted lcore, or -1 for the current one.
106 * The relative index, or -1 if not enabled.
108 int rte_lcore_index(int lcore_id);
111 * Return the ID of the physical socket of the logical core we are
114 * the ID of current lcoreid's physical socket
116 unsigned int rte_socket_id(void);
119 * Return number of physical sockets detected on the system.
121 * Note that number of nodes may not be correspondent to their physical id's:
122 * for example, a system may report two socket id's, but the actual socket id's
126 * the number of physical sockets as recognized by EAL
129 rte_socket_count(void);
132 * Return socket id with a particular index.
134 * This will return socket id at a particular position in list of all detected
135 * physical socket id's. For example, on a machine with sockets [0, 8], passing
136 * 1 as a parameter will return 8.
139 * index of physical socket id to return
142 * - physical socket id as recognized by EAL
143 * - -1 on error, with errno set to EINVAL
146 rte_socket_id_by_idx(unsigned int idx);
149 * Get the ID of the physical socket of the specified lcore
152 * the targeted lcore, which MUST be between 0 and RTE_MAX_LCORE-1.
154 * the ID of lcoreid's physical socket
157 rte_lcore_to_socket_id(unsigned int lcore_id);
161 * @b EXPERIMENTAL: this API may change without prior notice.
163 * Return the id of the lcore on a socket starting from zero.
166 * The targeted lcore, or -1 for the current one.
168 * The relative index, or -1 if not enabled.
172 rte_lcore_to_cpu_id(int lcore_id);
176 * @b EXPERIMENTAL: this API may change without prior notice.
178 * Return the cpuset for a given lcore.
180 * the targeted lcore, which MUST be between 0 and RTE_MAX_LCORE-1.
182 * The cpuset of that lcore
186 rte_lcore_cpuset(unsigned int lcore_id);
189 * Test if an lcore is enabled.
192 * The identifier of the lcore, which MUST be between 0 and
195 * True if the given lcore is enabled; false otherwise.
197 int rte_lcore_is_enabled(unsigned int lcore_id);
200 * Get the next enabled lcore ID.
203 * The current lcore (reference).
205 * If true, do not return the ID of the master lcore.
207 * If true, go back to 0 when RTE_MAX_LCORE is reached; otherwise,
208 * return RTE_MAX_LCORE.
210 * The next lcore_id or RTE_MAX_LCORE if not found.
212 unsigned int rte_get_next_lcore(unsigned int i, int skip_master, int wrap);
215 * Macro to browse all running lcores.
217 #define RTE_LCORE_FOREACH(i) \
218 for (i = rte_get_next_lcore(-1, 0, 0); \
220 i = rte_get_next_lcore(i, 0, 0))
223 * Macro to browse all running lcores except the master lcore.
225 #define RTE_LCORE_FOREACH_SLAVE(i) \
226 for (i = rte_get_next_lcore(-1, 1, 0); \
228 i = rte_get_next_lcore(i, 1, 0))
231 * Set core affinity of the current thread.
232 * Support both EAL and non-EAL thread and update TLS.
235 * Point to cpu_set_t for setting current thread affinity.
237 * On success, return 0; otherwise return -1;
239 int rte_thread_set_affinity(rte_cpuset_t *cpusetp);
242 * Get core affinity of the current thread.
245 * Point to cpu_set_t for getting current thread cpu affinity.
246 * It presumes input is not NULL, otherwise it causes panic.
249 void rte_thread_get_affinity(rte_cpuset_t *cpusetp);
254 * @note It fails with glibc < 2.12.
259 * Thread name to set.
261 * On success, return 0; otherwise return a negative value.
263 int rte_thread_setname(pthread_t id, const char *name);
268 * @note It fails with glibc < 2.12.
273 * Thread name to set.
275 * Thread name buffer length.
277 * On success, return 0; otherwise return a negative value.
280 int rte_thread_getname(pthread_t id, char *name, size_t len);
283 * Create a control thread.
285 * Wrapper to pthread_create(), pthread_setname_np() and
286 * pthread_setaffinity_np(). The affinity of the new thread is based
287 * on the CPU affinity retrieved at the time rte_eal_init() was called,
288 * the dataplane and service lcores are then excluded.
291 * Filled with the thread id of the new created thread.
293 * The name of the control thread (max 16 characters including '\0').
295 * Attributes for the new thread.
296 * @param start_routine
297 * Function to be executed by the new thread.
299 * Argument passed to start_routine.
301 * On success, returns 0; on error, it returns a negative value
302 * corresponding to the error number.
305 rte_ctrl_thread_create(pthread_t *thread, const char *name,
306 const pthread_attr_t *attr,
307 void *(*start_routine)(void *), void *arg);
314 #endif /* _RTE_LCORE_H_ */