1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2019 Intel Corporation
7 #include <rte_atomic.h>
9 #include <rte_launch.h>
10 #include <rte_lcore.h>
11 #include <rte_per_lcore.h>
12 #include <rte_common.h>
13 #include <rte_memory.h>
14 #include <eal_thread.h>
16 #include "eal_private.h"
17 #include "eal_windows.h"
20 * Send a message to a slave lcore identified by slave_id to call a
21 * function f with argument arg. Once the execution is done, the
22 * remote lcore switch in FINISHED state.
25 rte_eal_remote_launch(lcore_function_t *f, void *arg, unsigned int slave_id)
29 int m2s = lcore_config[slave_id].pipe_master2slave[1];
30 int s2m = lcore_config[slave_id].pipe_slave2master[0];
32 if (lcore_config[slave_id].state != WAIT)
35 lcore_config[slave_id].f = f;
36 lcore_config[slave_id].arg = arg;
40 while (n == 0 || (n < 0 && errno == EINTR))
41 n = _write(m2s, &c, 1);
43 rte_panic("cannot write on configuration pipe\n");
47 n = _read(s2m, &c, 1);
48 } while (n < 0 && errno == EINTR);
51 rte_panic("cannot read on configuration pipe\n");
57 eal_thread_init_master(unsigned int lcore_id)
59 /* set the lcore ID in per-lcore memory area */
60 RTE_PER_LCORE(_lcore_id) = lcore_id;
63 /* main loop of threads */
65 eal_thread_loop(void *arg __rte_unused)
69 unsigned int lcore_id;
72 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
74 thread_id = pthread_self();
76 /* retrieve our lcore_id from the configuration structure */
77 RTE_LCORE_FOREACH_SLAVE(lcore_id) {
78 if (thread_id == lcore_config[lcore_id].thread_id)
81 if (lcore_id == RTE_MAX_LCORE)
82 rte_panic("cannot retrieve lcore id\n");
84 m2s = lcore_config[lcore_id].pipe_master2slave[0];
85 s2m = lcore_config[lcore_id].pipe_slave2master[1];
87 /* set the lcore ID in per-lcore memory area */
88 RTE_PER_LCORE(_lcore_id) = lcore_id;
90 RTE_LOG(DEBUG, EAL, "lcore %u is ready (tid=%zx;cpuset=[%s])\n",
91 lcore_id, (uintptr_t)thread_id, cpuset);
93 /* read on our pipe to get commands */
99 n = _read(m2s, &c, 1);
100 } while (n < 0 && errno == EINTR);
103 rte_panic("cannot read on configuration pipe\n");
105 lcore_config[lcore_id].state = RUNNING;
109 while (n == 0 || (n < 0 && errno == EINTR))
110 n = _write(s2m, &c, 1);
112 rte_panic("cannot write on configuration pipe\n");
114 if (lcore_config[lcore_id].f == NULL)
115 rte_panic("NULL function pointer\n");
117 /* call the function and store the return value */
118 fct_arg = lcore_config[lcore_id].arg;
119 ret = lcore_config[lcore_id].f(fct_arg);
120 lcore_config[lcore_id].ret = ret;
123 /* when a service core returns, it should go directly to WAIT
124 * state, because the application will not lcore_wait() for it.
126 if (lcore_config[lcore_id].core_role == ROLE_SERVICE)
127 lcore_config[lcore_id].state = WAIT;
129 lcore_config[lcore_id].state = FINISHED;
133 /* function to create threads */
135 eal_thread_create(pthread_t *thread)
139 th = CreateThread(NULL, 0,
140 (LPTHREAD_START_ROUTINE)(ULONG_PTR)eal_thread_loop,
141 NULL, 0, (LPDWORD)thread);
145 SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS);
146 SetThreadPriority(th, THREAD_PRIORITY_TIME_CRITICAL);
151 /* get current thread ID */
155 return GetCurrentThreadId();
159 rte_thread_setname(__rte_unused pthread_t id, __rte_unused const char *name)
162 /* This is a stub, not the expected result */