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41 #include <rte_lcore.h>
42 #include <rte_common.h>
43 #include <rte_debug.h>
45 #include "eal_private.h"
46 #include "eal_thread.h"
49 * Parse /sys/devices/system/cpu to get the number of physical and logical
50 * processors on the machine. The function will fill the cpu_info
54 rte_eal_cpu_init(void)
56 /* pointer to global configuration */
57 struct rte_config *config = rte_eal_get_configuration();
62 * Parse the maximum set of logical cores, detect the subset of running
63 * ones and enable them by default.
65 for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
66 lcore_config[lcore_id].core_index = count;
68 /* init cpuset for per lcore config */
69 CPU_ZERO(&lcore_config[lcore_id].cpuset);
71 /* in 1:1 mapping, record related cpu detected state */
72 lcore_config[lcore_id].detected = eal_cpu_detected(lcore_id);
73 if (lcore_config[lcore_id].detected == 0) {
74 config->lcore_role[lcore_id] = ROLE_OFF;
75 lcore_config[lcore_id].core_index = -1;
79 /* By default, lcore 1:1 map to cpu id */
80 CPU_SET(lcore_id, &lcore_config[lcore_id].cpuset);
82 /* By default, each detected core is enabled */
83 config->lcore_role[lcore_id] = ROLE_RTE;
84 lcore_config[lcore_id].core_id = eal_cpu_core_id(lcore_id);
85 lcore_config[lcore_id].socket_id = eal_cpu_socket_id(lcore_id);
86 if (lcore_config[lcore_id].socket_id >= RTE_MAX_NUMA_NODES)
87 #ifdef RTE_EAL_ALLOW_INV_SOCKET_ID
88 lcore_config[lcore_id].socket_id = 0;
90 rte_panic("Socket ID (%u) is greater than "
91 "RTE_MAX_NUMA_NODES (%d)\n",
92 lcore_config[lcore_id].socket_id,
96 RTE_LOG(DEBUG, EAL, "Detected lcore %u as "
97 "core %u on socket %u\n",
98 lcore_id, lcore_config[lcore_id].core_id,
99 lcore_config[lcore_id].socket_id);
102 /* Set the count of enabled logical cores of the EAL configuration */
103 config->lcore_count = count;
105 "Support maximum %u logical core(s) by configuration.\n",
107 RTE_LOG(DEBUG, EAL, "Detected %u lcore(s)\n", config->lcore_count);