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39 #include <sys/types.h>
40 #include <sys/queue.h>
42 #include <sys/prctl.h>
43 #include <netinet/in.h>
52 #include <rte_common.h>
54 #include <rte_malloc.h>
55 #include <rte_memory.h>
56 #include <rte_memcpy.h>
58 #include <rte_launch.h>
59 #include <rte_atomic.h>
60 #include <rte_cycles.h>
61 #include <rte_prefetch.h>
62 #include <rte_lcore.h>
63 #include <rte_per_lcore.h>
64 #include <rte_branch_prediction.h>
65 #include <rte_interrupts.h>
66 #include <rte_random.h>
67 #include <rte_debug.h>
68 #include <rte_ether.h>
69 #include <rte_ethdev.h>
70 #include <rte_mempool.h>
72 #include <rte_string_fns.h>
76 #define SIG_PARENT_EXIT SIGUSR1
79 pid_t pid; /**< pthread identifier */
80 lcore_function_t *f; /**< function to call */
81 void *arg; /**< argument of function */
82 slave_exit_notify *cb_fn;
83 } __rte_cache_aligned;
86 static struct lcore_stat *core_cfg;
87 static uint16_t *lcore_cfg = NULL;
89 /* signal handler to be notified after parent leaves */
91 sighand_parent_exit(int sig)
93 printf("lcore = %u : Find parent leaves, sig=%d\n", rte_lcore_id(),
95 printf("Child leaving\n");
102 * Real function entrance ran in slave process
105 slave_proc_func(void)
107 struct rte_config *config;
108 unsigned slave_id = rte_lcore_id();
109 struct lcore_stat *cfg = &core_cfg[slave_id];
111 if (prctl(PR_SET_PDEATHSIG, SIG_PARENT_EXIT, 0, 0, 0, 0) != 0)
112 printf("Warning: Slave can't register for being notified in"
113 "case master process exited\n");
115 struct sigaction act;
116 memset(&act, 0 , sizeof(act));
117 act.sa_handler = sighand_parent_exit;
118 if (sigaction(SIG_PARENT_EXIT, &act, NULL) != 0)
119 printf("Fail to register signal handler:%d\n", SIG_PARENT_EXIT);
122 /* Set slave process to SECONDARY to avoid operation like dev_start/stop etc */
123 config = rte_eal_get_configuration();
125 printf("Warning:Can't get rte_config\n");
127 config->process_type = RTE_PROC_SECONDARY;
129 printf("Core %u is ready (pid=%d)\n", slave_id, (int)cfg->pid);
131 exit(cfg->f(cfg->arg));
135 * function entrance ran in master thread, which will spawn slave process and wait until
136 * specific slave exited.
139 lcore_func(void *arg __attribute__((unused)))
141 unsigned slave_id = rte_lcore_id();
142 struct lcore_stat *cfg = &core_cfg[slave_id];
145 if (rte_get_master_lcore() == slave_id)
146 return cfg->f(cfg->arg);
148 /* fork a slave process */
152 printf("Failed to fork\n");
154 } else if (pid == 0) /* child */
155 return slave_proc_func();
159 waitpid(pid, &stat, 0);
164 /* Notify slave's exit if applicable */
166 cfg->cb_fn(slave_id, stat);
175 /* Setup lcore ID allocation map */
176 lcore_cfg = rte_zmalloc("LCORE_ID_MAP",
177 sizeof(uint16_t) * RTE_MAX_LCORE,
178 RTE_CACHE_LINE_SIZE);
180 if(lcore_cfg == NULL)
181 rte_panic("Failed to malloc\n");
183 for (i = 0; i < RTE_MAX_LCORE; i++) {
184 if (rte_lcore_is_enabled(i))
191 flib_assign_lcore_id(void)
197 * thread assigned a lcore id previously, or a slave thread. But still have
198 * a bug here: If the core mask includes core 0, and that core call this
199 * function, it still can get a new lcore id.
201 if (rte_lcore_id() != 0)
205 /* Find a lcore id not used yet, avoid to use lcore ID 0 */
206 for (i = 1; i < RTE_MAX_LCORE; i++) {
207 if (lcore_cfg[i] == 0)
210 if (i == RTE_MAX_LCORE)
213 /* Assign new lcore id to this thread */
215 ret = rte_atomic16_cmpset(&lcore_cfg[i], 0, 1);
216 } while (unlikely(ret == 0));
218 RTE_PER_LCORE(_lcore_id) = i;
223 flib_free_lcore_id(unsigned lcore_id)
225 /* id is not valid or belongs to pinned core id */
226 if (lcore_id >= RTE_MAX_LCORE || lcore_id == 0 ||
227 rte_lcore_is_enabled(lcore_id))
230 lcore_cfg[lcore_id] = 0;
234 flib_register_slave_exit_notify(unsigned slave_id,
235 slave_exit_notify *cb)
240 if (!rte_lcore_is_enabled(slave_id))
243 core_cfg[slave_id].cb_fn = cb;
249 flib_query_slave_status(unsigned slave_id)
251 if (!rte_lcore_is_enabled(slave_id))
253 /* pid only be set when slave process spawned */
254 if (core_cfg[slave_id].pid != 0)
261 flib_remote_launch(lcore_function_t *f,
262 void *arg, unsigned slave_id)
267 if (!rte_lcore_is_enabled(slave_id))
270 /* Wait until specific lcore state change to WAIT */
271 rte_eal_wait_lcore(slave_id);
273 core_cfg[slave_id].f = f;
274 core_cfg[slave_id].arg = arg;
276 return rte_eal_remote_launch(lcore_func, NULL, slave_id);
280 flib_mp_remote_launch(lcore_function_t *f, void *arg,
281 enum rte_rmt_call_master_t call_master)
285 RTE_LCORE_FOREACH_SLAVE(i) {
286 core_cfg[i].arg = arg;
290 return rte_eal_mp_remote_launch(lcore_func, NULL, call_master);
296 if ((core_cfg = rte_zmalloc("core_cfg",
297 sizeof(struct lcore_stat) * RTE_MAX_LCORE,
298 RTE_CACHE_LINE_SIZE)) == NULL ) {
299 printf("rte_zmalloc failed\n");
303 if (lcore_id_init() != 0) {
304 printf("lcore_id_init failed\n");