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41 #include <sys/queue.h>
43 #include <rte_memory.h>
45 #include <rte_eal_memconfig.h>
48 #include "eal_private.h"
49 #include "eal_internal_cfg.h"
52 * Return a pointer to a read-only table of struct rte_physmem_desc
53 * elements, containing the layout of all addressable physical
54 * memory. The last element of the table contains a NULL address.
56 const struct rte_memseg *
57 rte_eal_get_physmem_layout(void)
59 return rte_eal_get_configuration()->mem_config->memseg;
63 /* get the total size of memory */
65 rte_eal_get_physmem_size(void)
67 const struct rte_mem_config *mcfg;
69 uint64_t total_len = 0;
71 /* get pointer to global configuration */
72 mcfg = rte_eal_get_configuration()->mem_config;
74 for (i = 0; i < RTE_MAX_MEMSEG; i++) {
75 if (mcfg->memseg[i].addr == NULL)
78 total_len += mcfg->memseg[i].len;
84 /* Dump the physical memory layout on console */
86 rte_dump_physmem_layout(FILE *f)
88 const struct rte_mem_config *mcfg;
91 /* get pointer to global configuration */
92 mcfg = rte_eal_get_configuration()->mem_config;
94 for (i = 0; i < RTE_MAX_MEMSEG; i++) {
95 if (mcfg->memseg[i].addr == NULL)
98 fprintf(f, "Segment %u: phys:0x%"PRIx64", len:%zu, "
99 "virt:%p, socket_id:%"PRId32", "
100 "hugepage_sz:%"PRIu64", nchannel:%"PRIx32", "
101 "nrank:%"PRIx32"\n", i,
102 mcfg->memseg[i].phys_addr,
104 mcfg->memseg[i].addr,
105 mcfg->memseg[i].socket_id,
106 mcfg->memseg[i].hugepage_sz,
107 mcfg->memseg[i].nchannel,
108 mcfg->memseg[i].nrank);
112 /* return the number of memory channels */
113 unsigned rte_memory_get_nchannel(void)
115 return rte_eal_get_configuration()->mem_config->nchannel;
118 /* return the number of memory rank */
119 unsigned rte_memory_get_nrank(void)
121 return rte_eal_get_configuration()->mem_config->nrank;
125 rte_eal_memdevice_init(void)
127 struct rte_config *config;
129 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
132 config = rte_eal_get_configuration();
133 config->mem_config->nchannel = internal_config.force_nchannel;
134 config->mem_config->nrank = internal_config.force_nrank;
139 /* Lock page in physical memory and prevent from swapping. */
141 rte_mem_lock_page(const void *virt)
143 unsigned long virtual = (unsigned long)virt;
144 int page_size = getpagesize();
145 unsigned long aligned = (virtual & ~(page_size - 1));
146 return mlock((void *)aligned, page_size);
149 /* init memory subsystem */
151 rte_eal_memory_init(void)
153 RTE_LOG(DEBUG, EAL, "Setting up physically contiguous memory...\n");
155 const int retval = rte_eal_process_type() == RTE_PROC_PRIMARY ?
156 rte_eal_hugepage_init() :
157 rte_eal_hugepage_attach();
161 if (internal_config.no_shconf == 0 && rte_eal_memdevice_init() < 0)