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40 * API for lcore and socket manipulation
43 #include <rte_config.h>
44 #include <rte_per_lcore.h>
46 #include <rte_launch.h>
52 #define LCORE_ID_ANY UINT32_MAX /**< Any lcore. */
54 #if defined(__linux__)
55 typedef cpu_set_t rte_cpuset_t;
56 #elif defined(__FreeBSD__)
57 #include <pthread_np.h>
58 typedef cpuset_t rte_cpuset_t;
62 * Structure storing internal configuration (per-lcore)
65 unsigned detected; /**< true if lcore was detected */
66 pthread_t thread_id; /**< pthread identifier */
67 int pipe_master2slave[2]; /**< communication pipe with master */
68 int pipe_slave2master[2]; /**< communication pipe with master */
69 lcore_function_t * volatile f; /**< function to call */
70 void * volatile arg; /**< argument of function */
71 volatile int ret; /**< return value of function */
72 volatile enum rte_lcore_state_t state; /**< lcore state */
73 unsigned socket_id; /**< physical socket id for this lcore */
74 unsigned core_id; /**< core number on socket for this lcore */
75 int core_index; /**< relative index, starting from 0 */
76 rte_cpuset_t cpuset; /**< cpu set which the lcore affinity to */
77 uint8_t core_role; /**< role of core eg: OFF, RTE, SERVICE */
81 * Internal configuration (per-lcore)
83 extern struct lcore_config lcore_config[RTE_MAX_LCORE];
85 RTE_DECLARE_PER_LCORE(unsigned, _lcore_id); /**< Per thread "lcore id". */
86 RTE_DECLARE_PER_LCORE(rte_cpuset_t, _cpuset); /**< Per thread "cpuset". */
89 * Return the ID of the execution unit we are running on.
91 * Logical core ID (in EAL thread) or LCORE_ID_ANY (in non-EAL thread)
93 static inline unsigned
96 return RTE_PER_LCORE(_lcore_id);
100 * Get the id of the master lcore
103 * the id of the master lcore
105 static inline unsigned
106 rte_get_master_lcore(void)
108 return rte_eal_get_configuration()->master_lcore;
112 * Return the number of execution units (lcores) on the system.
115 * the number of execution units (lcores) on the system.
117 static inline unsigned
118 rte_lcore_count(void)
120 const struct rte_config *cfg = rte_eal_get_configuration();
121 return cfg->lcore_count;
125 * Return the index of the lcore starting from zero.
126 * The order is physical or given by command line (-l option).
129 * The targeted lcore, or -1 for the current one.
131 * The relative index, or -1 if not enabled.
134 rte_lcore_index(int lcore_id)
136 if (lcore_id >= RTE_MAX_LCORE)
139 lcore_id = rte_lcore_id();
140 return lcore_config[lcore_id].core_index;
144 * Return the ID of the physical socket of the logical core we are
147 * the ID of current lcoreid's physical socket
149 unsigned rte_socket_id(void);
152 * Get the ID of the physical socket of the specified lcore
155 * the targeted lcore, which MUST be between 0 and RTE_MAX_LCORE-1.
157 * the ID of lcoreid's physical socket
159 static inline unsigned
160 rte_lcore_to_socket_id(unsigned lcore_id)
162 return lcore_config[lcore_id].socket_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.
175 rte_lcore_is_enabled(unsigned lcore_id)
177 struct rte_config *cfg = rte_eal_get_configuration();
178 if (lcore_id >= RTE_MAX_LCORE)
180 return cfg->lcore_role[lcore_id] == ROLE_RTE;
184 * Get the next enabled lcore ID.
187 * The current lcore (reference).
189 * If true, do not return the ID of the master lcore.
191 * If true, go back to 0 when RTE_MAX_LCORE is reached; otherwise,
192 * return RTE_MAX_LCORE.
194 * The next lcore_id or RTE_MAX_LCORE if not found.
196 static inline unsigned
197 rte_get_next_lcore(unsigned i, int skip_master, int wrap)
203 while (i < RTE_MAX_LCORE) {
204 if (!rte_lcore_is_enabled(i) ||
205 (skip_master && (i == rte_get_master_lcore()))) {
216 * Macro to browse all running lcores.
218 #define RTE_LCORE_FOREACH(i) \
219 for (i = rte_get_next_lcore(-1, 0, 0); \
221 i = rte_get_next_lcore(i, 0, 0))
224 * Macro to browse all running lcores except the master lcore.
226 #define RTE_LCORE_FOREACH_SLAVE(i) \
227 for (i = rte_get_next_lcore(-1, 1, 0); \
229 i = rte_get_next_lcore(i, 1, 0))
232 * Set core affinity of the current thread.
233 * Support both EAL and non-EAL thread and update TLS.
236 * Point to cpu_set_t for setting current thread affinity.
238 * On success, return 0; otherwise return -1;
240 int rte_thread_set_affinity(rte_cpuset_t *cpusetp);
243 * Get core affinity of the current thread.
246 * Point to cpu_set_t for getting current thread cpu affinity.
247 * It presumes input is not NULL, otherwise it causes panic.
250 void rte_thread_get_affinity(rte_cpuset_t *cpusetp);
255 * @note It fails with glibc < 2.12.
260 * Thread name to set.
262 * On success, return 0; otherwise return a negative value.
264 int rte_thread_setname(pthread_t id, const char *name);
267 * Test if the core supplied has a specific role
270 * The identifier of the lcore, which MUST be between 0 and
273 * The role to be checked against.
275 * On success, return 0; otherwise return a negative value.
278 rte_lcore_has_role(unsigned int lcore_id, enum rte_lcore_role_t role);
285 #endif /* _RTE_LCORE_H_ */