1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
11 #include <pthread_np.h>
12 #include <sys/queue.h>
15 #include <rte_debug.h>
16 #include <rte_atomic.h>
17 #include <rte_launch.h>
19 #include <rte_memory.h>
20 #include <rte_per_lcore.h>
22 #include <rte_lcore.h>
23 #include <rte_eal_trace.h>
25 #include "eal_private.h"
26 #include "eal_thread.h"
28 RTE_DEFINE_PER_LCORE(unsigned, _lcore_id) = LCORE_ID_ANY;
29 RTE_DEFINE_PER_LCORE(unsigned, _socket_id) = (unsigned)SOCKET_ID_ANY;
30 RTE_DEFINE_PER_LCORE(rte_cpuset_t, _cpuset);
33 * Send a message to a slave lcore identified by slave_id to call a
34 * function f with argument arg. Once the execution is done, the
35 * remote lcore switch in FINISHED state.
38 rte_eal_remote_launch(int (*f)(void *), void *arg, unsigned slave_id)
42 int m2s = lcore_config[slave_id].pipe_master2slave[1];
43 int s2m = lcore_config[slave_id].pipe_slave2master[0];
46 if (lcore_config[slave_id].state != WAIT)
49 lcore_config[slave_id].f = f;
50 lcore_config[slave_id].arg = arg;
54 while (n == 0 || (n < 0 && errno == EINTR))
55 n = write(m2s, &c, 1);
57 rte_panic("cannot write on configuration pipe\n");
62 } while (n < 0 && errno == EINTR);
65 rte_panic("cannot read on configuration pipe\n");
69 rte_eal_trace_thread_remote_launch(f, arg, slave_id, rc);
73 /* set affinity for current thread */
75 eal_thread_set_affinity(void)
77 unsigned lcore_id = rte_lcore_id();
79 /* acquire system unique id */
82 /* update EAL thread core affinity */
83 return rte_thread_set_affinity(&lcore_config[lcore_id].cpuset);
86 void eal_thread_init_master(unsigned lcore_id)
88 /* set the lcore ID in per-lcore memory area */
89 RTE_PER_LCORE(_lcore_id) = lcore_id;
91 /* set CPU affinity */
92 if (eal_thread_set_affinity() < 0)
93 rte_panic("cannot set affinity\n");
96 /* main loop of threads */
98 eal_thread_loop(__rte_unused void *arg)
105 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
107 thread_id = pthread_self();
109 /* retrieve our lcore_id from the configuration structure */
110 RTE_LCORE_FOREACH_SLAVE(lcore_id) {
111 if (thread_id == lcore_config[lcore_id].thread_id)
114 if (lcore_id == RTE_MAX_LCORE)
115 rte_panic("cannot retrieve lcore id\n");
117 m2s = lcore_config[lcore_id].pipe_master2slave[0];
118 s2m = lcore_config[lcore_id].pipe_slave2master[1];
120 /* set the lcore ID in per-lcore memory area */
121 RTE_PER_LCORE(_lcore_id) = lcore_id;
123 /* set CPU affinity */
124 if (eal_thread_set_affinity() < 0)
125 rte_panic("cannot set affinity\n");
127 ret = eal_thread_dump_affinity(cpuset, sizeof(cpuset));
129 RTE_LOG(DEBUG, EAL, "lcore %u is ready (tid=%p;cpuset=[%s%s])\n",
130 lcore_id, thread_id, cpuset, ret == 0 ? "" : "...");
132 __rte_trace_mem_per_thread_alloc();
133 rte_eal_trace_thread_lcore_ready(lcore_id, cpuset);
135 /* read on our pipe to get commands */
141 n = read(m2s, &c, 1);
142 } while (n < 0 && errno == EINTR);
145 rte_panic("cannot read on configuration pipe\n");
147 lcore_config[lcore_id].state = RUNNING;
151 while (n == 0 || (n < 0 && errno == EINTR))
152 n = write(s2m, &c, 1);
154 rte_panic("cannot write on configuration pipe\n");
156 if (lcore_config[lcore_id].f == NULL)
157 rte_panic("NULL function pointer\n");
159 /* call the function and store the return value */
160 fct_arg = lcore_config[lcore_id].arg;
161 ret = lcore_config[lcore_id].f(fct_arg);
162 lcore_config[lcore_id].ret = ret;
164 lcore_config[lcore_id].state = FINISHED;
168 /* pthread_exit(NULL); */
172 /* require calling thread tid by gettid() */
173 int rte_sys_gettid(void)
180 int rte_thread_setname(pthread_t id, const char *name)
182 /* this BSD function returns no error */
183 pthread_set_name_np(id, name);
187 int rte_thread_getname(pthread_t id, char *name, size_t len)