xref: /spdk/lib/env_dpdk/threads.c (revision 0f2ef7cf222dcc0ef2ead346f074baeaab3cee27)
1 /*-
2  *   BSD LICENSE
3  *
4  *   Copyright (c) Intel Corporation.
5  *   All rights reserved.
6  *
7  *   Redistribution and use in source and binary forms, with or without
8  *   modification, are permitted provided that the following conditions
9  *   are met:
10  *
11  *     * Redistributions of source code must retain the above copyright
12  *       notice, this list of conditions and the following disclaimer.
13  *     * Redistributions in binary form must reproduce the above copyright
14  *       notice, this list of conditions and the following disclaimer in
15  *       the documentation and/or other materials provided with the
16  *       distribution.
17  *     * Neither the name of Intel Corporation nor the names of its
18  *       contributors may be used to endorse or promote products derived
19  *       from this software without specific prior written permission.
20  *
21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 #include "spdk/env.h"
35 
36 #include <rte_config.h>
37 #include <rte_lcore.h>
38 
39 uint32_t
40 spdk_env_get_core_count(void)
41 {
42 	return rte_lcore_count();
43 }
44 
45 uint32_t
46 spdk_env_get_current_core(void)
47 {
48 	return rte_lcore_id();
49 }
50 
51 uint32_t
52 spdk_env_get_first_core(void)
53 {
54 	return rte_get_next_lcore(-1, 0, 0);
55 }
56 
57 uint32_t
58 spdk_env_get_last_core(void)
59 {
60 	uint32_t i;
61 	uint32_t last_core = UINT32_MAX;
62 
63 	SPDK_ENV_FOREACH_CORE(i) {
64 		last_core = i;
65 	}
66 
67 	return last_core;
68 }
69 
70 uint32_t
71 spdk_env_get_next_core(uint32_t prev_core)
72 {
73 	unsigned lcore;
74 
75 	lcore = rte_get_next_lcore(prev_core, 0, 0);
76 	if (lcore == RTE_MAX_LCORE) {
77 		return UINT32_MAX;
78 	}
79 	return lcore;
80 }
81 
82 uint32_t
83 spdk_env_get_socket_id(uint32_t core)
84 {
85 	return rte_lcore_to_socket_id(core);
86 }
87 
88 int
89 spdk_env_thread_launch_pinned(uint32_t core, thread_start_fn fn, void *arg)
90 {
91 	int rc;
92 
93 	rc = rte_eal_remote_launch(fn, arg, core);
94 
95 	return rc;
96 }
97 
98 void
99 spdk_env_thread_wait_all(void)
100 {
101 	rte_eal_mp_wait_lcore();
102 }
103