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 worker lcore identified by worker_id to call a
21 * function f with argument arg. Once the execution is done, the
22 * remote lcore switches to WAIT state.
25 rte_eal_remote_launch(lcore_function_t *f, void *arg, unsigned int worker_id)
29 int m2w = lcore_config[worker_id].pipe_main2worker[1];
30 int w2m = lcore_config[worker_id].pipe_worker2main[0];
32 if (lcore_config[worker_id].state != WAIT)
35 lcore_config[worker_id].f = f;
36 lcore_config[worker_id].arg = arg;
40 while (n == 0 || (n < 0 && errno == EINTR))
41 n = _write(m2w, &c, 1);
43 rte_panic("cannot write on configuration pipe\n");
47 n = _read(w2m, &c, 1);
48 } while (n < 0 && errno == EINTR);
51 rte_panic("cannot read on configuration pipe\n");
56 /* main loop of threads */
58 eal_thread_loop(void *arg __rte_unused)
62 unsigned int lcore_id;
65 char cpuset[RTE_CPU_AFFINITY_STR_LEN];
67 thread_id = pthread_self();
69 /* retrieve our lcore_id from the configuration structure */
70 RTE_LCORE_FOREACH_WORKER(lcore_id) {
71 if (thread_id == lcore_config[lcore_id].thread_id)
74 if (lcore_id == RTE_MAX_LCORE)
75 rte_panic("cannot retrieve lcore id\n");
77 m2w = lcore_config[lcore_id].pipe_main2worker[0];
78 w2m = lcore_config[lcore_id].pipe_worker2main[1];
80 __rte_thread_init(lcore_id, &lcore_config[lcore_id].cpuset);
82 RTE_LOG(DEBUG, EAL, "lcore %u is ready (tid=%zx;cpuset=[%s])\n",
83 lcore_id, (uintptr_t)thread_id, cpuset);
85 /* read on our pipe to get commands */
91 n = _read(m2w, &c, 1);
92 } while (n < 0 && errno == EINTR);
95 rte_panic("cannot read on configuration pipe\n");
97 lcore_config[lcore_id].state = RUNNING;
101 while (n == 0 || (n < 0 && errno == EINTR))
102 n = _write(w2m, &c, 1);
104 rte_panic("cannot write on configuration pipe\n");
106 if (lcore_config[lcore_id].f == NULL)
107 rte_panic("NULL function pointer\n");
109 /* call the function and store the return value */
110 fct_arg = lcore_config[lcore_id].arg;
111 ret = lcore_config[lcore_id].f(fct_arg);
112 lcore_config[lcore_id].ret = ret;
113 lcore_config[lcore_id].f = NULL;
114 lcore_config[lcore_id].arg = NULL;
117 lcore_config[lcore_id].state = WAIT;
121 /* function to create threads */
123 eal_thread_create(pthread_t *thread)
127 th = CreateThread(NULL, 0,
128 (LPTHREAD_START_ROUTINE)(ULONG_PTR)eal_thread_loop,
129 NULL, 0, (LPDWORD)thread);
133 SetPriorityClass(GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
134 SetThreadPriority(th, THREAD_PRIORITY_NORMAL);
139 /* get current thread ID */
143 return GetCurrentThreadId();
147 rte_thread_setname(__rte_unused pthread_t id, __rte_unused const char *name)
150 /* This is a stub, not the expected result */