1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation.
3 * Copyright(c) 2013 6WIND S.A.
6 #define _FILE_OFFSET_BITS 64
16 #include <sys/types.h>
18 #include <sys/queue.h>
20 #include <sys/resource.h>
23 #include <sys/ioctl.h>
27 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
32 #include <rte_errno.h>
34 #include <rte_memory.h>
35 #include <rte_launch.h>
37 #include <rte_eal_memconfig.h>
38 #include <rte_per_lcore.h>
39 #include <rte_lcore.h>
40 #include <rte_common.h>
41 #include <rte_string_fns.h>
43 #include "eal_private.h"
44 #include "eal_memalloc.h"
45 #include "eal_internal_cfg.h"
46 #include "eal_filesystem.h"
47 #include "eal_hugepages.h"
49 #define PFN_MASK_SIZE 8
53 * Huge page mapping under linux
55 * To reserve a big contiguous amount of memory, we use the hugepage
56 * feature of linux. For that, we need to have hugetlbfs mounted. This
57 * code will create many files in this directory (one per page) and
58 * map them in virtual memory. For each page, we will retrieve its
59 * physical address and remap it in order to have a virtual contiguous
60 * zone as well as a physical contiguous zone.
63 static bool phys_addrs_available = true;
65 #define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space"
68 test_phys_addrs_available(void)
73 if (!rte_eal_has_hugepages()) {
75 "Started without hugepages support, physical addresses not available\n");
76 phys_addrs_available = false;
80 physaddr = rte_mem_virt2phy(&tmp);
81 if (physaddr == RTE_BAD_PHYS_ADDR) {
82 if (rte_eal_iova_mode() == RTE_IOVA_PA)
84 "Cannot obtain physical addresses: %s. "
85 "Only vfio will function.\n",
87 phys_addrs_available = false;
92 * Get physical address of any mapped virtual address in the current process.
95 rte_mem_virt2phy(const void *virtaddr)
98 uint64_t page, physaddr;
99 unsigned long virt_pfn;
103 /* Cannot parse /proc/self/pagemap, no need to log errors everywhere */
104 if (!phys_addrs_available)
107 /* standard page size */
108 page_size = getpagesize();
110 fd = open("/proc/self/pagemap", O_RDONLY);
112 RTE_LOG(ERR, EAL, "%s(): cannot open /proc/self/pagemap: %s\n",
113 __func__, strerror(errno));
117 virt_pfn = (unsigned long)virtaddr / page_size;
118 offset = sizeof(uint64_t) * virt_pfn;
119 if (lseek(fd, offset, SEEK_SET) == (off_t) -1) {
120 RTE_LOG(ERR, EAL, "%s(): seek error in /proc/self/pagemap: %s\n",
121 __func__, strerror(errno));
126 retval = read(fd, &page, PFN_MASK_SIZE);
129 RTE_LOG(ERR, EAL, "%s(): cannot read /proc/self/pagemap: %s\n",
130 __func__, strerror(errno));
132 } else if (retval != PFN_MASK_SIZE) {
133 RTE_LOG(ERR, EAL, "%s(): read %d bytes from /proc/self/pagemap "
134 "but expected %d:\n",
135 __func__, retval, PFN_MASK_SIZE);
140 * the pfn (page frame number) are bits 0-54 (see
141 * pagemap.txt in linux Documentation)
143 if ((page & 0x7fffffffffffffULL) == 0)
146 physaddr = ((page & 0x7fffffffffffffULL) * page_size)
147 + ((unsigned long)virtaddr % page_size);
153 rte_mem_virt2iova(const void *virtaddr)
155 if (rte_eal_iova_mode() == RTE_IOVA_VA)
156 return (uintptr_t)virtaddr;
157 return rte_mem_virt2phy(virtaddr);
161 * For each hugepage in hugepg_tbl, fill the physaddr value. We find
162 * it by browsing the /proc/self/pagemap special file.
165 find_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
170 for (i = 0; i < hpi->num_pages[0]; i++) {
171 addr = rte_mem_virt2phy(hugepg_tbl[i].orig_va);
172 if (addr == RTE_BAD_PHYS_ADDR)
174 hugepg_tbl[i].physaddr = addr;
180 * For each hugepage in hugepg_tbl, fill the physaddr value sequentially.
183 set_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
186 static phys_addr_t addr;
188 for (i = 0; i < hpi->num_pages[0]; i++) {
189 hugepg_tbl[i].physaddr = addr;
190 addr += hugepg_tbl[i].size;
196 * Check whether address-space layout randomization is enabled in
197 * the kernel. This is important for multi-process as it can prevent
198 * two processes mapping data to the same virtual address
200 * 0 - address space randomization disabled
201 * 1/2 - address space randomization enabled
202 * negative error code on error
208 int retval, fd = open(RANDOMIZE_VA_SPACE_FILE, O_RDONLY);
211 retval = read(fd, &c, 1);
221 default: return -EINVAL;
225 static sigjmp_buf huge_jmpenv;
227 static void huge_sigbus_handler(int signo __rte_unused)
229 siglongjmp(huge_jmpenv, 1);
232 /* Put setjmp into a wrap method to avoid compiling error. Any non-volatile,
233 * non-static local variable in the stack frame calling sigsetjmp might be
234 * clobbered by a call to longjmp.
236 static int huge_wrap_sigsetjmp(void)
238 return sigsetjmp(huge_jmpenv, 1);
241 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
242 /* Callback for numa library. */
243 void numa_error(char *where)
245 RTE_LOG(ERR, EAL, "%s failed: %s\n", where, strerror(errno));
250 * Mmap all hugepages of hugepage table: it first open a file in
251 * hugetlbfs, then mmap() hugepage_sz data in it. If orig is set, the
252 * virtual address is stored in hugepg_tbl[i].orig_va, else it is stored
253 * in hugepg_tbl[i].final_va. The second mapping (when orig is 0) tries to
254 * map contiguous physical blocks in contiguous virtual blocks.
257 map_all_hugepages(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi,
258 uint64_t *essential_memory __rte_unused)
263 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
265 int essential_prev = 0;
267 struct bitmask *oldmask = NULL;
268 bool have_numa = true;
269 unsigned long maxnode = 0;
271 /* Check if kernel supports NUMA. */
272 if (numa_available() != 0) {
273 RTE_LOG(DEBUG, EAL, "NUMA is not supported.\n");
278 RTE_LOG(DEBUG, EAL, "Trying to obtain current memory policy.\n");
279 oldmask = numa_allocate_nodemask();
280 if (get_mempolicy(&oldpolicy, oldmask->maskp,
281 oldmask->size + 1, 0, 0) < 0) {
283 "Failed to get current mempolicy: %s. "
284 "Assuming MPOL_DEFAULT.\n", strerror(errno));
285 oldpolicy = MPOL_DEFAULT;
287 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
288 if (internal_config.socket_mem[i])
293 for (i = 0; i < hpi->num_pages[0]; i++) {
294 struct hugepage_file *hf = &hugepg_tbl[i];
295 uint64_t hugepage_sz = hpi->hugepage_sz;
297 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
301 for (j = 0; j < maxnode; j++)
302 if (essential_memory[j])
306 node_id = (node_id + 1) % maxnode;
307 while (!internal_config.socket_mem[node_id]) {
314 essential_prev = essential_memory[j];
316 if (essential_memory[j] < hugepage_sz)
317 essential_memory[j] = 0;
319 essential_memory[j] -= hugepage_sz;
323 "Setting policy MPOL_PREFERRED for socket %d\n",
325 numa_set_preferred(node_id);
330 hf->size = hugepage_sz;
331 eal_get_hugefile_path(hf->filepath, sizeof(hf->filepath),
332 hpi->hugedir, hf->file_id);
333 hf->filepath[sizeof(hf->filepath) - 1] = '\0';
335 /* try to create hugepage file */
336 fd = open(hf->filepath, O_CREAT | O_RDWR, 0600);
338 RTE_LOG(DEBUG, EAL, "%s(): open failed: %s\n", __func__,
343 /* map the segment, and populate page tables,
344 * the kernel fills this segment with zeros. we don't care where
345 * this gets mapped - we already have contiguous memory areas
346 * ready for us to map into.
348 virtaddr = mmap(NULL, hugepage_sz, PROT_READ | PROT_WRITE,
349 MAP_SHARED | MAP_POPULATE, fd, 0);
350 if (virtaddr == MAP_FAILED) {
351 RTE_LOG(DEBUG, EAL, "%s(): mmap failed: %s\n", __func__,
357 hf->orig_va = virtaddr;
359 /* In linux, hugetlb limitations, like cgroup, are
360 * enforced at fault time instead of mmap(), even
361 * with the option of MAP_POPULATE. Kernel will send
362 * a SIGBUS signal. To avoid to be killed, save stack
363 * environment here, if SIGBUS happens, we can jump
366 if (huge_wrap_sigsetjmp()) {
367 RTE_LOG(DEBUG, EAL, "SIGBUS: Cannot mmap more "
368 "hugepages of size %u MB\n",
369 (unsigned int)(hugepage_sz / 0x100000));
370 munmap(virtaddr, hugepage_sz);
372 unlink(hugepg_tbl[i].filepath);
373 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
375 essential_memory[node_id] =
380 *(int *)virtaddr = 0;
382 /* set shared lock on the file. */
383 if (flock(fd, LOCK_SH) < 0) {
384 RTE_LOG(DEBUG, EAL, "%s(): Locking file failed:%s \n",
385 __func__, strerror(errno));
394 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
397 "Restoring previous memory policy: %d\n", oldpolicy);
398 if (oldpolicy == MPOL_DEFAULT) {
399 numa_set_localalloc();
400 } else if (set_mempolicy(oldpolicy, oldmask->maskp,
401 oldmask->size + 1) < 0) {
402 RTE_LOG(ERR, EAL, "Failed to restore mempolicy: %s\n",
404 numa_set_localalloc();
408 numa_free_cpumask(oldmask);
414 * Parse /proc/self/numa_maps to get the NUMA socket ID for each huge
418 find_numasocket(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
422 unsigned i, hp_count = 0;
425 char hugedir_str[PATH_MAX];
428 f = fopen("/proc/self/numa_maps", "r");
430 RTE_LOG(NOTICE, EAL, "NUMA support not available"
431 " consider that all memory is in socket_id 0\n");
435 snprintf(hugedir_str, sizeof(hugedir_str),
436 "%s/%s", hpi->hugedir, internal_config.hugefile_prefix);
439 while (fgets(buf, sizeof(buf), f) != NULL) {
441 /* ignore non huge page */
442 if (strstr(buf, " huge ") == NULL &&
443 strstr(buf, hugedir_str) == NULL)
447 virt_addr = strtoull(buf, &end, 16);
448 if (virt_addr == 0 || end == buf) {
449 RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__);
453 /* get node id (socket id) */
454 nodestr = strstr(buf, " N");
455 if (nodestr == NULL) {
456 RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__);
460 end = strstr(nodestr, "=");
462 RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__);
468 socket_id = strtoul(nodestr, &end, 0);
469 if ((nodestr[0] == '\0') || (end == NULL) || (*end != '\0')) {
470 RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__);
474 /* if we find this page in our mappings, set socket_id */
475 for (i = 0; i < hpi->num_pages[0]; i++) {
476 void *va = (void *)(unsigned long)virt_addr;
477 if (hugepg_tbl[i].orig_va == va) {
478 hugepg_tbl[i].socket_id = socket_id;
480 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
482 "Hugepage %s is on socket %d\n",
483 hugepg_tbl[i].filepath, socket_id);
489 if (hp_count < hpi->num_pages[0])
501 cmp_physaddr(const void *a, const void *b)
503 #ifndef RTE_ARCH_PPC_64
504 const struct hugepage_file *p1 = a;
505 const struct hugepage_file *p2 = b;
507 /* PowerPC needs memory sorted in reverse order from x86 */
508 const struct hugepage_file *p1 = b;
509 const struct hugepage_file *p2 = a;
511 if (p1->physaddr < p2->physaddr)
513 else if (p1->physaddr > p2->physaddr)
520 * Uses mmap to create a shared memory area for storage of data
521 * Used in this file to store the hugepage file map on disk
524 create_shared_memory(const char *filename, const size_t mem_size)
529 /* if no shared files mode is used, create anonymous memory instead */
530 if (internal_config.no_shconf) {
531 retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE,
532 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
533 if (retval == MAP_FAILED)
538 fd = open(filename, O_CREAT | O_RDWR, 0666);
541 if (ftruncate(fd, mem_size) < 0) {
545 retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
547 if (retval == MAP_FAILED)
553 * this copies *active* hugepages from one hugepage table to another.
554 * destination is typically the shared memory.
557 copy_hugepages_to_shared_mem(struct hugepage_file * dst, int dest_size,
558 const struct hugepage_file * src, int src_size)
560 int src_pos, dst_pos = 0;
562 for (src_pos = 0; src_pos < src_size; src_pos++) {
563 if (src[src_pos].orig_va != NULL) {
564 /* error on overflow attempt */
565 if (dst_pos == dest_size)
567 memcpy(&dst[dst_pos], &src[src_pos], sizeof(struct hugepage_file));
575 unlink_hugepage_files(struct hugepage_file *hugepg_tbl,
576 unsigned num_hp_info)
578 unsigned socket, size;
579 int page, nrpages = 0;
581 /* get total number of hugepages */
582 for (size = 0; size < num_hp_info; size++)
583 for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++)
585 internal_config.hugepage_info[size].num_pages[socket];
587 for (page = 0; page < nrpages; page++) {
588 struct hugepage_file *hp = &hugepg_tbl[page];
590 if (hp->orig_va != NULL && unlink(hp->filepath)) {
591 RTE_LOG(WARNING, EAL, "%s(): Removing %s failed: %s\n",
592 __func__, hp->filepath, strerror(errno));
599 * unmaps hugepages that are not going to be used. since we originally allocate
600 * ALL hugepages (not just those we need), additional unmapping needs to be done.
603 unmap_unneeded_hugepages(struct hugepage_file *hugepg_tbl,
604 struct hugepage_info *hpi,
605 unsigned num_hp_info)
607 unsigned socket, size;
608 int page, nrpages = 0;
610 /* get total number of hugepages */
611 for (size = 0; size < num_hp_info; size++)
612 for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++)
613 nrpages += internal_config.hugepage_info[size].num_pages[socket];
615 for (size = 0; size < num_hp_info; size++) {
616 for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) {
617 unsigned pages_found = 0;
619 /* traverse until we have unmapped all the unused pages */
620 for (page = 0; page < nrpages; page++) {
621 struct hugepage_file *hp = &hugepg_tbl[page];
623 /* find a page that matches the criteria */
624 if ((hp->size == hpi[size].hugepage_sz) &&
625 (hp->socket_id == (int) socket)) {
627 /* if we skipped enough pages, unmap the rest */
628 if (pages_found == hpi[size].num_pages[socket]) {
631 unmap_len = hp->size;
633 /* get start addr and len of the remaining segment */
638 if (unlink(hp->filepath) == -1) {
639 RTE_LOG(ERR, EAL, "%s(): Removing %s failed: %s\n",
640 __func__, hp->filepath, strerror(errno));
644 /* lock the page and skip */
650 } /* foreach socket */
651 } /* foreach pagesize */
657 remap_segment(struct hugepage_file *hugepages, int seg_start, int seg_end)
659 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
660 struct rte_memseg_list *msl;
661 struct rte_fbarray *arr;
662 int cur_page, seg_len;
663 unsigned int msl_idx;
669 page_sz = hugepages[seg_start].size;
670 socket_id = hugepages[seg_start].socket_id;
671 seg_len = seg_end - seg_start;
673 RTE_LOG(DEBUG, EAL, "Attempting to map %" PRIu64 "M on socket %i\n",
674 (seg_len * page_sz) >> 20ULL, socket_id);
676 /* find free space in memseg lists */
677 for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) {
679 msl = &mcfg->memsegs[msl_idx];
680 arr = &msl->memseg_arr;
682 if (msl->page_sz != page_sz)
684 if (msl->socket_id != socket_id)
687 /* leave space for a hole if array is not empty */
688 empty = arr->count == 0;
689 ms_idx = rte_fbarray_find_next_n_free(arr, 0,
690 seg_len + (empty ? 0 : 1));
692 /* memseg list is full? */
696 /* leave some space between memsegs, they are not IOVA
697 * contiguous, so they shouldn't be VA contiguous either.
703 if (msl_idx == RTE_MAX_MEMSEG_LISTS) {
704 RTE_LOG(ERR, EAL, "Could not find space for memseg. Please increase %s and/or %s in configuration.\n",
705 RTE_STR(CONFIG_RTE_MAX_MEMSEG_PER_TYPE),
706 RTE_STR(CONFIG_RTE_MAX_MEM_PER_TYPE));
710 #ifdef RTE_ARCH_PPC64
711 /* for PPC64 we go through the list backwards */
712 for (cur_page = seg_end - 1; cur_page >= seg_start;
713 cur_page--, ms_idx++) {
715 for (cur_page = seg_start; cur_page < seg_end; cur_page++, ms_idx++) {
717 struct hugepage_file *hfile = &hugepages[cur_page];
718 struct rte_memseg *ms = rte_fbarray_get(arr, ms_idx);
722 fd = open(hfile->filepath, O_RDWR);
724 RTE_LOG(ERR, EAL, "Could not open '%s': %s\n",
725 hfile->filepath, strerror(errno));
728 /* set shared lock on the file. */
729 if (flock(fd, LOCK_SH) < 0) {
730 RTE_LOG(DEBUG, EAL, "Could not lock '%s': %s\n",
731 hfile->filepath, strerror(errno));
735 memseg_len = (size_t)page_sz;
736 addr = RTE_PTR_ADD(msl->base_va, ms_idx * memseg_len);
738 /* we know this address is already mmapped by memseg list, so
739 * using MAP_FIXED here is safe
741 addr = mmap(addr, page_sz, PROT_READ | PROT_WRITE,
742 MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd, 0);
743 if (addr == MAP_FAILED) {
744 RTE_LOG(ERR, EAL, "Couldn't remap '%s': %s\n",
745 hfile->filepath, strerror(errno));
750 /* we have a new address, so unmap previous one */
752 /* in 32-bit legacy mode, we have already unmapped the page */
753 if (!internal_config.legacy_mem)
754 munmap(hfile->orig_va, page_sz);
756 munmap(hfile->orig_va, page_sz);
759 hfile->orig_va = NULL;
760 hfile->final_va = addr;
762 /* rewrite physical addresses in IOVA as VA mode */
763 if (rte_eal_iova_mode() == RTE_IOVA_VA)
764 hfile->physaddr = (uintptr_t)addr;
766 /* set up memseg data */
768 ms->hugepage_sz = page_sz;
769 ms->len = memseg_len;
770 ms->iova = hfile->physaddr;
771 ms->socket_id = hfile->socket_id;
772 ms->nchannel = rte_memory_get_nchannel();
773 ms->nrank = rte_memory_get_nrank();
775 rte_fbarray_set_used(arr, ms_idx);
777 /* store segment fd internally */
778 if (eal_memalloc_set_seg_fd(msl_idx, ms_idx, fd) < 0)
779 RTE_LOG(ERR, EAL, "Could not store segment fd: %s\n",
780 rte_strerror(rte_errno));
782 RTE_LOG(DEBUG, EAL, "Allocated %" PRIu64 "M on socket %i\n",
783 (seg_len * page_sz) >> 20, socket_id);
788 get_mem_amount(uint64_t page_sz, uint64_t max_mem)
790 uint64_t area_sz, max_pages;
792 /* limit to RTE_MAX_MEMSEG_PER_LIST pages or RTE_MAX_MEM_MB_PER_LIST */
793 max_pages = RTE_MAX_MEMSEG_PER_LIST;
794 max_mem = RTE_MIN((uint64_t)RTE_MAX_MEM_MB_PER_LIST << 20, max_mem);
796 area_sz = RTE_MIN(page_sz * max_pages, max_mem);
798 /* make sure the list isn't smaller than the page size */
799 area_sz = RTE_MAX(area_sz, page_sz);
801 return RTE_ALIGN(area_sz, page_sz);
805 free_memseg_list(struct rte_memseg_list *msl)
807 if (rte_fbarray_destroy(&msl->memseg_arr)) {
808 RTE_LOG(ERR, EAL, "Cannot destroy memseg list\n");
811 memset(msl, 0, sizeof(*msl));
815 #define MEMSEG_LIST_FMT "memseg-%" PRIu64 "k-%i-%i"
817 alloc_memseg_list(struct rte_memseg_list *msl, uint64_t page_sz,
818 int n_segs, int socket_id, int type_msl_idx)
820 char name[RTE_FBARRAY_NAME_LEN];
822 snprintf(name, sizeof(name), MEMSEG_LIST_FMT, page_sz >> 10, socket_id,
824 if (rte_fbarray_init(&msl->memseg_arr, name, n_segs,
825 sizeof(struct rte_memseg))) {
826 RTE_LOG(ERR, EAL, "Cannot allocate memseg list: %s\n",
827 rte_strerror(rte_errno));
831 msl->page_sz = page_sz;
832 msl->socket_id = socket_id;
835 RTE_LOG(DEBUG, EAL, "Memseg list allocated: 0x%zxkB at socket %i\n",
836 (size_t)page_sz >> 10, socket_id);
842 alloc_va_space(struct rte_memseg_list *msl)
849 #ifdef RTE_ARCH_PPC_64
850 flags |= MAP_HUGETLB;
853 page_sz = msl->page_sz;
854 mem_sz = page_sz * msl->memseg_arr.len;
856 addr = eal_get_virtual_area(msl->base_va, &mem_sz, page_sz, 0, flags);
858 if (rte_errno == EADDRNOTAVAIL)
859 RTE_LOG(ERR, EAL, "Could not mmap %llu bytes at [%p] - please use '--base-virtaddr' option\n",
860 (unsigned long long)mem_sz, msl->base_va);
862 RTE_LOG(ERR, EAL, "Cannot reserve memory\n");
872 * Our VA space is not preallocated yet, so preallocate it here. We need to know
873 * how many segments there are in order to map all pages into one address space,
874 * and leave appropriate holes between segments so that rte_malloc does not
875 * concatenate them into one big segment.
877 * we also need to unmap original pages to free up address space.
879 static int __rte_unused
880 prealloc_segments(struct hugepage_file *hugepages, int n_pages)
882 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
883 int cur_page, seg_start_page, end_seg, new_memseg;
884 unsigned int hpi_idx, socket, i;
885 int n_contig_segs, n_segs;
888 /* before we preallocate segments, we need to free up our VA space.
889 * we're not removing files, and we already have information about
890 * PA-contiguousness, so it is safe to unmap everything.
892 for (cur_page = 0; cur_page < n_pages; cur_page++) {
893 struct hugepage_file *hpi = &hugepages[cur_page];
894 munmap(hpi->orig_va, hpi->size);
898 /* we cannot know how many page sizes and sockets we have discovered, so
899 * loop over all of them
901 for (hpi_idx = 0; hpi_idx < internal_config.num_hugepage_sizes;
904 internal_config.hugepage_info[hpi_idx].hugepage_sz;
906 for (i = 0; i < rte_socket_count(); i++) {
907 struct rte_memseg_list *msl;
909 socket = rte_socket_id_by_idx(i);
914 for (cur_page = 0; cur_page < n_pages; cur_page++) {
915 struct hugepage_file *prev, *cur;
916 int prev_seg_start_page = -1;
918 cur = &hugepages[cur_page];
919 prev = cur_page == 0 ? NULL :
920 &hugepages[cur_page - 1];
927 else if (cur->socket_id != (int) socket)
929 else if (cur->size != page_sz)
931 else if (cur_page == 0)
933 #ifdef RTE_ARCH_PPC_64
934 /* On PPC64 architecture, the mmap always start
935 * from higher address to lower address. Here,
936 * physical addresses are in descending order.
938 else if ((prev->physaddr - cur->physaddr) !=
942 else if ((cur->physaddr - prev->physaddr) !=
947 /* if we're already inside a segment,
948 * new segment means end of current one
950 if (seg_start_page != -1) {
952 prev_seg_start_page =
955 seg_start_page = cur_page;
959 if (prev_seg_start_page != -1) {
960 /* we've found a new segment */
964 } else if (seg_start_page != -1) {
965 /* we didn't find new segment,
966 * but did end current one
974 /* we're skipping this page */
978 /* segment continues */
980 /* check if we missed last segment */
981 if (seg_start_page != -1) {
983 n_segs += cur_page - seg_start_page;
986 /* if no segments were found, do not preallocate */
990 /* we now have total number of pages that we will
991 * allocate for this segment list. add separator pages
992 * to the total count, and preallocate VA space.
994 n_segs += n_contig_segs - 1;
996 /* now, preallocate VA space for these segments */
998 /* first, find suitable memseg list for this */
999 for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS;
1001 msl = &mcfg->memsegs[msl_idx];
1003 if (msl->base_va != NULL)
1007 if (msl_idx == RTE_MAX_MEMSEG_LISTS) {
1008 RTE_LOG(ERR, EAL, "Not enough space in memseg lists, please increase %s\n",
1009 RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
1013 /* now, allocate fbarray itself */
1014 if (alloc_memseg_list(msl, page_sz, n_segs, socket,
1018 /* finally, allocate VA space */
1019 if (alloc_va_space(msl) < 0)
1027 * We cannot reallocate memseg lists on the fly because PPC64 stores pages
1028 * backwards, therefore we have to process the entire memseg first before
1029 * remapping it into memseg list VA space.
1032 remap_needed_hugepages(struct hugepage_file *hugepages, int n_pages)
1034 int cur_page, seg_start_page, new_memseg, ret;
1037 for (cur_page = 0; cur_page < n_pages; cur_page++) {
1038 struct hugepage_file *prev, *cur;
1042 cur = &hugepages[cur_page];
1043 prev = cur_page == 0 ? NULL : &hugepages[cur_page - 1];
1045 /* if size is zero, no more pages left */
1051 else if (cur->socket_id != prev->socket_id)
1053 else if (cur->size != prev->size)
1055 #ifdef RTE_ARCH_PPC_64
1056 /* On PPC64 architecture, the mmap always start from higher
1057 * address to lower address. Here, physical addresses are in
1060 else if ((prev->physaddr - cur->physaddr) != cur->size)
1063 else if ((cur->physaddr - prev->physaddr) != cur->size)
1068 /* if this isn't the first time, remap segment */
1069 if (cur_page != 0) {
1070 ret = remap_segment(hugepages, seg_start_page,
1075 /* remember where we started */
1076 seg_start_page = cur_page;
1078 /* continuation of previous memseg */
1080 /* we were stopped, but we didn't remap the last segment, do it now */
1081 if (cur_page != 0) {
1082 ret = remap_segment(hugepages, seg_start_page,
1090 static inline uint64_t
1091 get_socket_mem_size(int socket)
1096 for (i = 0; i < internal_config.num_hugepage_sizes; i++){
1097 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
1098 size += hpi->hugepage_sz * hpi->num_pages[socket];
1105 * This function is a NUMA-aware equivalent of calc_num_pages.
1106 * It takes in the list of hugepage sizes and the
1107 * number of pages thereof, and calculates the best number of
1108 * pages of each size to fulfill the request for <memory> ram
1111 calc_num_pages_per_socket(uint64_t * memory,
1112 struct hugepage_info *hp_info,
1113 struct hugepage_info *hp_used,
1114 unsigned num_hp_info)
1116 unsigned socket, j, i = 0;
1117 unsigned requested, available;
1118 int total_num_pages = 0;
1119 uint64_t remaining_mem, cur_mem;
1120 uint64_t total_mem = internal_config.memory;
1122 if (num_hp_info == 0)
1125 /* if specific memory amounts per socket weren't requested */
1126 if (internal_config.force_sockets == 0) {
1129 int cpu_per_socket[RTE_MAX_NUMA_NODES];
1130 size_t default_size;
1133 /* Compute number of cores per socket */
1134 memset(cpu_per_socket, 0, sizeof(cpu_per_socket));
1135 RTE_LCORE_FOREACH(lcore_id) {
1136 cpu_per_socket[rte_lcore_to_socket_id(lcore_id)]++;
1140 * Automatically spread requested memory amongst detected sockets according
1141 * to number of cores from cpu mask present on each socket
1143 total_size = internal_config.memory;
1144 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0; socket++) {
1146 /* Set memory amount per socket */
1147 default_size = (internal_config.memory * cpu_per_socket[socket])
1148 / rte_lcore_count();
1150 /* Limit to maximum available memory on socket */
1151 default_size = RTE_MIN(default_size, get_socket_mem_size(socket));
1154 memory[socket] = default_size;
1155 total_size -= default_size;
1159 * If some memory is remaining, try to allocate it by getting all
1160 * available memory from sockets, one after the other
1162 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0; socket++) {
1163 /* take whatever is available */
1164 default_size = RTE_MIN(get_socket_mem_size(socket) - memory[socket],
1168 memory[socket] += default_size;
1169 total_size -= default_size;
1172 /* in 32-bit mode, allocate all of the memory only on master
1175 total_size = internal_config.memory;
1176 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0;
1178 struct rte_config *cfg = rte_eal_get_configuration();
1179 unsigned int master_lcore_socket;
1181 master_lcore_socket =
1182 rte_lcore_to_socket_id(cfg->master_lcore);
1184 if (master_lcore_socket != socket)
1188 memory[socket] = total_size;
1194 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_mem != 0; socket++) {
1195 /* skips if the memory on specific socket wasn't requested */
1196 for (i = 0; i < num_hp_info && memory[socket] != 0; i++){
1197 strlcpy(hp_used[i].hugedir, hp_info[i].hugedir,
1198 sizeof(hp_used[i].hugedir));
1199 hp_used[i].num_pages[socket] = RTE_MIN(
1200 memory[socket] / hp_info[i].hugepage_sz,
1201 hp_info[i].num_pages[socket]);
1203 cur_mem = hp_used[i].num_pages[socket] *
1204 hp_used[i].hugepage_sz;
1206 memory[socket] -= cur_mem;
1207 total_mem -= cur_mem;
1209 total_num_pages += hp_used[i].num_pages[socket];
1211 /* check if we have met all memory requests */
1212 if (memory[socket] == 0)
1215 /* check if we have any more pages left at this size, if so
1216 * move on to next size */
1217 if (hp_used[i].num_pages[socket] == hp_info[i].num_pages[socket])
1219 /* At this point we know that there are more pages available that are
1220 * bigger than the memory we want, so lets see if we can get enough
1221 * from other page sizes.
1224 for (j = i+1; j < num_hp_info; j++)
1225 remaining_mem += hp_info[j].hugepage_sz *
1226 hp_info[j].num_pages[socket];
1228 /* is there enough other memory, if not allocate another page and quit */
1229 if (remaining_mem < memory[socket]){
1230 cur_mem = RTE_MIN(memory[socket],
1231 hp_info[i].hugepage_sz);
1232 memory[socket] -= cur_mem;
1233 total_mem -= cur_mem;
1234 hp_used[i].num_pages[socket]++;
1236 break; /* we are done with this socket*/
1239 /* if we didn't satisfy all memory requirements per socket */
1240 if (memory[socket] > 0 &&
1241 internal_config.socket_mem[socket] != 0) {
1242 /* to prevent icc errors */
1243 requested = (unsigned) (internal_config.socket_mem[socket] /
1245 available = requested -
1246 ((unsigned) (memory[socket] / 0x100000));
1247 RTE_LOG(ERR, EAL, "Not enough memory available on socket %u! "
1248 "Requested: %uMB, available: %uMB\n", socket,
1249 requested, available);
1254 /* if we didn't satisfy total memory requirements */
1255 if (total_mem > 0) {
1256 requested = (unsigned) (internal_config.memory / 0x100000);
1257 available = requested - (unsigned) (total_mem / 0x100000);
1258 RTE_LOG(ERR, EAL, "Not enough memory available! Requested: %uMB,"
1259 " available: %uMB\n", requested, available);
1262 return total_num_pages;
1265 static inline size_t
1266 eal_get_hugepage_mem_size(void)
1271 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
1272 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
1273 if (strnlen(hpi->hugedir, sizeof(hpi->hugedir)) != 0) {
1274 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
1275 size += hpi->hugepage_sz * hpi->num_pages[j];
1280 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
1283 static struct sigaction huge_action_old;
1284 static int huge_need_recover;
1287 huge_register_sigbus(void)
1290 struct sigaction action;
1293 sigaddset(&mask, SIGBUS);
1294 action.sa_flags = 0;
1295 action.sa_mask = mask;
1296 action.sa_handler = huge_sigbus_handler;
1298 huge_need_recover = !sigaction(SIGBUS, &action, &huge_action_old);
1302 huge_recover_sigbus(void)
1304 if (huge_need_recover) {
1305 sigaction(SIGBUS, &huge_action_old, NULL);
1306 huge_need_recover = 0;
1311 * Prepare physical memory mapping: fill configuration structure with
1312 * these infos, return 0 on success.
1313 * 1. map N huge pages in separate files in hugetlbfs
1314 * 2. find associated physical addr
1315 * 3. find associated NUMA socket ID
1316 * 4. sort all huge pages by physical address
1317 * 5. remap these N huge pages in the correct order
1318 * 6. unmap the first mapping
1319 * 7. fill memsegs in configuration with contiguous zones
1322 eal_legacy_hugepage_init(void)
1324 struct rte_mem_config *mcfg;
1325 struct hugepage_file *hugepage = NULL, *tmp_hp = NULL;
1326 struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES];
1327 struct rte_fbarray *arr;
1328 struct rte_memseg *ms;
1330 uint64_t memory[RTE_MAX_NUMA_NODES];
1334 int nr_hugefiles, nr_hugepages = 0;
1337 test_phys_addrs_available();
1339 memset(used_hp, 0, sizeof(used_hp));
1341 /* get pointer to global configuration */
1342 mcfg = rte_eal_get_configuration()->mem_config;
1344 /* hugetlbfs can be disabled */
1345 if (internal_config.no_hugetlbfs) {
1346 struct rte_memseg_list *msl;
1348 int n_segs, cur_seg;
1350 /* nohuge mode is legacy mode */
1351 internal_config.legacy_mem = 1;
1353 /* create a memseg list */
1354 msl = &mcfg->memsegs[0];
1356 page_sz = RTE_PGSIZE_4K;
1357 n_segs = internal_config.memory / page_sz;
1359 if (rte_fbarray_init(&msl->memseg_arr, "nohugemem", n_segs,
1360 sizeof(struct rte_memseg))) {
1361 RTE_LOG(ERR, EAL, "Cannot allocate memseg list\n");
1365 addr = mmap(NULL, internal_config.memory, PROT_READ | PROT_WRITE,
1366 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
1367 if (addr == MAP_FAILED) {
1368 RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__,
1372 msl->base_va = addr;
1373 msl->page_sz = page_sz;
1375 msl->len = internal_config.memory;
1377 /* populate memsegs. each memseg is one page long */
1378 for (cur_seg = 0; cur_seg < n_segs; cur_seg++) {
1379 arr = &msl->memseg_arr;
1381 ms = rte_fbarray_get(arr, cur_seg);
1382 if (rte_eal_iova_mode() == RTE_IOVA_VA)
1383 ms->iova = (uintptr_t)addr;
1385 ms->iova = RTE_BAD_IOVA;
1387 ms->hugepage_sz = page_sz;
1391 rte_fbarray_set_used(arr, cur_seg);
1393 addr = RTE_PTR_ADD(addr, (size_t)page_sz);
1398 /* calculate total number of hugepages available. at this point we haven't
1399 * yet started sorting them so they all are on socket 0 */
1400 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) {
1401 /* meanwhile, also initialize used_hp hugepage sizes in used_hp */
1402 used_hp[i].hugepage_sz = internal_config.hugepage_info[i].hugepage_sz;
1404 nr_hugepages += internal_config.hugepage_info[i].num_pages[0];
1408 * allocate a memory area for hugepage table.
1409 * this isn't shared memory yet. due to the fact that we need some
1410 * processing done on these pages, shared memory will be created
1413 tmp_hp = malloc(nr_hugepages * sizeof(struct hugepage_file));
1417 memset(tmp_hp, 0, nr_hugepages * sizeof(struct hugepage_file));
1419 hp_offset = 0; /* where we start the current page size entries */
1421 huge_register_sigbus();
1423 /* make a copy of socket_mem, needed for balanced allocation. */
1424 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
1425 memory[i] = internal_config.socket_mem[i];
1427 /* map all hugepages and sort them */
1428 for (i = 0; i < (int)internal_config.num_hugepage_sizes; i ++){
1429 unsigned pages_old, pages_new;
1430 struct hugepage_info *hpi;
1433 * we don't yet mark hugepages as used at this stage, so
1434 * we just map all hugepages available to the system
1435 * all hugepages are still located on socket 0
1437 hpi = &internal_config.hugepage_info[i];
1439 if (hpi->num_pages[0] == 0)
1442 /* map all hugepages available */
1443 pages_old = hpi->num_pages[0];
1444 pages_new = map_all_hugepages(&tmp_hp[hp_offset], hpi, memory);
1445 if (pages_new < pages_old) {
1447 "%d not %d hugepages of size %u MB allocated\n",
1448 pages_new, pages_old,
1449 (unsigned)(hpi->hugepage_sz / 0x100000));
1451 int pages = pages_old - pages_new;
1453 nr_hugepages -= pages;
1454 hpi->num_pages[0] = pages_new;
1459 if (phys_addrs_available &&
1460 rte_eal_iova_mode() != RTE_IOVA_VA) {
1461 /* find physical addresses for each hugepage */
1462 if (find_physaddrs(&tmp_hp[hp_offset], hpi) < 0) {
1463 RTE_LOG(DEBUG, EAL, "Failed to find phys addr "
1464 "for %u MB pages\n",
1465 (unsigned int)(hpi->hugepage_sz / 0x100000));
1469 /* set physical addresses for each hugepage */
1470 if (set_physaddrs(&tmp_hp[hp_offset], hpi) < 0) {
1471 RTE_LOG(DEBUG, EAL, "Failed to set phys addr "
1472 "for %u MB pages\n",
1473 (unsigned int)(hpi->hugepage_sz / 0x100000));
1478 if (find_numasocket(&tmp_hp[hp_offset], hpi) < 0){
1479 RTE_LOG(DEBUG, EAL, "Failed to find NUMA socket for %u MB pages\n",
1480 (unsigned)(hpi->hugepage_sz / 0x100000));
1484 qsort(&tmp_hp[hp_offset], hpi->num_pages[0],
1485 sizeof(struct hugepage_file), cmp_physaddr);
1487 /* we have processed a num of hugepages of this size, so inc offset */
1488 hp_offset += hpi->num_pages[0];
1491 huge_recover_sigbus();
1493 if (internal_config.memory == 0 && internal_config.force_sockets == 0)
1494 internal_config.memory = eal_get_hugepage_mem_size();
1496 nr_hugefiles = nr_hugepages;
1499 /* clean out the numbers of pages */
1500 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++)
1501 for (j = 0; j < RTE_MAX_NUMA_NODES; j++)
1502 internal_config.hugepage_info[i].num_pages[j] = 0;
1504 /* get hugepages for each socket */
1505 for (i = 0; i < nr_hugefiles; i++) {
1506 int socket = tmp_hp[i].socket_id;
1508 /* find a hugepage info with right size and increment num_pages */
1509 const int nb_hpsizes = RTE_MIN(MAX_HUGEPAGE_SIZES,
1510 (int)internal_config.num_hugepage_sizes);
1511 for (j = 0; j < nb_hpsizes; j++) {
1512 if (tmp_hp[i].size ==
1513 internal_config.hugepage_info[j].hugepage_sz) {
1514 internal_config.hugepage_info[j].num_pages[socket]++;
1519 /* make a copy of socket_mem, needed for number of pages calculation */
1520 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
1521 memory[i] = internal_config.socket_mem[i];
1523 /* calculate final number of pages */
1524 nr_hugepages = calc_num_pages_per_socket(memory,
1525 internal_config.hugepage_info, used_hp,
1526 internal_config.num_hugepage_sizes);
1528 /* error if not enough memory available */
1529 if (nr_hugepages < 0)
1533 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) {
1534 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
1535 if (used_hp[i].num_pages[j] > 0) {
1537 "Requesting %u pages of size %uMB"
1538 " from socket %i\n",
1539 used_hp[i].num_pages[j],
1541 (used_hp[i].hugepage_sz / 0x100000),
1547 /* create shared memory */
1548 hugepage = create_shared_memory(eal_hugepage_data_path(),
1549 nr_hugefiles * sizeof(struct hugepage_file));
1551 if (hugepage == NULL) {
1552 RTE_LOG(ERR, EAL, "Failed to create shared memory!\n");
1555 memset(hugepage, 0, nr_hugefiles * sizeof(struct hugepage_file));
1558 * unmap pages that we won't need (looks at used_hp).
1559 * also, sets final_va to NULL on pages that were unmapped.
1561 if (unmap_unneeded_hugepages(tmp_hp, used_hp,
1562 internal_config.num_hugepage_sizes) < 0) {
1563 RTE_LOG(ERR, EAL, "Unmapping and locking hugepages failed!\n");
1568 * copy stuff from malloc'd hugepage* to the actual shared memory.
1569 * this procedure only copies those hugepages that have orig_va
1570 * not NULL. has overflow protection.
1572 if (copy_hugepages_to_shared_mem(hugepage, nr_hugefiles,
1573 tmp_hp, nr_hugefiles) < 0) {
1574 RTE_LOG(ERR, EAL, "Copying tables to shared memory failed!\n");
1579 /* for legacy 32-bit mode, we did not preallocate VA space, so do it */
1580 if (internal_config.legacy_mem &&
1581 prealloc_segments(hugepage, nr_hugefiles)) {
1582 RTE_LOG(ERR, EAL, "Could not preallocate VA space for hugepages\n");
1587 /* remap all pages we do need into memseg list VA space, so that those
1588 * pages become first-class citizens in DPDK memory subsystem
1590 if (remap_needed_hugepages(hugepage, nr_hugefiles)) {
1591 RTE_LOG(ERR, EAL, "Couldn't remap hugepage files into memseg lists\n");
1595 /* free the hugepage backing files */
1596 if (internal_config.hugepage_unlink &&
1597 unlink_hugepage_files(tmp_hp, internal_config.num_hugepage_sizes) < 0) {
1598 RTE_LOG(ERR, EAL, "Unlinking hugepage files failed!\n");
1602 /* free the temporary hugepage table */
1606 munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file));
1608 /* we're not going to allocate more pages, so release VA space for
1609 * unused memseg lists
1611 for (i = 0; i < RTE_MAX_MEMSEG_LISTS; i++) {
1612 struct rte_memseg_list *msl = &mcfg->memsegs[i];
1615 /* skip inactive lists */
1616 if (msl->base_va == NULL)
1618 /* skip lists where there is at least one page allocated */
1619 if (msl->memseg_arr.count > 0)
1621 /* this is an unused list, deallocate it */
1623 munmap(msl->base_va, mem_sz);
1624 msl->base_va = NULL;
1626 /* destroy backing fbarray */
1627 rte_fbarray_destroy(&msl->memseg_arr);
1633 huge_recover_sigbus();
1635 if (hugepage != NULL)
1636 munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file));
1641 static int __rte_unused
1642 hugepage_count_walk(const struct rte_memseg_list *msl, void *arg)
1644 struct hugepage_info *hpi = arg;
1646 if (msl->page_sz != hpi->hugepage_sz)
1649 hpi->num_pages[msl->socket_id] += msl->memseg_arr.len;
1654 limits_callback(int socket_id, size_t cur_limit, size_t new_len)
1656 RTE_SET_USED(socket_id);
1657 RTE_SET_USED(cur_limit);
1658 RTE_SET_USED(new_len);
1663 eal_hugepage_init(void)
1665 struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES];
1666 uint64_t memory[RTE_MAX_NUMA_NODES];
1667 int hp_sz_idx, socket_id;
1669 test_phys_addrs_available();
1671 memset(used_hp, 0, sizeof(used_hp));
1674 hp_sz_idx < (int) internal_config.num_hugepage_sizes;
1677 struct hugepage_info dummy;
1680 /* also initialize used_hp hugepage sizes in used_hp */
1681 struct hugepage_info *hpi;
1682 hpi = &internal_config.hugepage_info[hp_sz_idx];
1683 used_hp[hp_sz_idx].hugepage_sz = hpi->hugepage_sz;
1686 /* for 32-bit, limit number of pages on socket to whatever we've
1687 * preallocated, as we cannot allocate more.
1689 memset(&dummy, 0, sizeof(dummy));
1690 dummy.hugepage_sz = hpi->hugepage_sz;
1691 if (rte_memseg_list_walk(hugepage_count_walk, &dummy) < 0)
1694 for (i = 0; i < RTE_DIM(dummy.num_pages); i++) {
1695 hpi->num_pages[i] = RTE_MIN(hpi->num_pages[i],
1696 dummy.num_pages[i]);
1701 /* make a copy of socket_mem, needed for balanced allocation. */
1702 for (hp_sz_idx = 0; hp_sz_idx < RTE_MAX_NUMA_NODES; hp_sz_idx++)
1703 memory[hp_sz_idx] = internal_config.socket_mem[hp_sz_idx];
1705 /* calculate final number of pages */
1706 if (calc_num_pages_per_socket(memory,
1707 internal_config.hugepage_info, used_hp,
1708 internal_config.num_hugepage_sizes) < 0)
1712 hp_sz_idx < (int)internal_config.num_hugepage_sizes;
1714 for (socket_id = 0; socket_id < RTE_MAX_NUMA_NODES;
1716 struct rte_memseg **pages;
1717 struct hugepage_info *hpi = &used_hp[hp_sz_idx];
1718 unsigned int num_pages = hpi->num_pages[socket_id];
1719 int num_pages_alloc, i;
1724 pages = malloc(sizeof(*pages) * num_pages);
1726 RTE_LOG(DEBUG, EAL, "Allocating %u pages of size %" PRIu64 "M on socket %i\n",
1727 num_pages, hpi->hugepage_sz >> 20, socket_id);
1729 num_pages_alloc = eal_memalloc_alloc_seg_bulk(pages,
1730 num_pages, hpi->hugepage_sz,
1732 if (num_pages_alloc < 0) {
1737 /* mark preallocated pages as unfreeable */
1738 for (i = 0; i < num_pages_alloc; i++) {
1739 struct rte_memseg *ms = pages[i];
1740 ms->flags |= RTE_MEMSEG_FLAG_DO_NOT_FREE;
1745 /* if socket limits were specified, set them */
1746 if (internal_config.force_socket_limits) {
1748 for (i = 0; i < RTE_MAX_NUMA_NODES; i++) {
1749 uint64_t limit = internal_config.socket_limit[i];
1752 if (rte_mem_alloc_validator_register("socket-limit",
1753 limits_callback, i, limit))
1754 RTE_LOG(ERR, EAL, "Failed to register socket limits validator callback\n");
1761 * uses fstat to report the size of a file on disk
1767 if (fstat(fd, &st) < 0)
1773 * This creates the memory mappings in the secondary process to match that of
1774 * the server process. It goes through each memory segment in the DPDK runtime
1775 * configuration and finds the hugepages which form that segment, mapping them
1776 * in order to form a contiguous block in the virtual memory space
1779 eal_legacy_hugepage_attach(void)
1781 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
1782 struct hugepage_file *hp = NULL;
1783 unsigned int num_hp = 0;
1785 unsigned int cur_seg;
1787 int fd, fd_hugepage = -1;
1789 if (aslr_enabled() > 0) {
1790 RTE_LOG(WARNING, EAL, "WARNING: Address Space Layout Randomization "
1791 "(ASLR) is enabled in the kernel.\n");
1792 RTE_LOG(WARNING, EAL, " This may cause issues with mapping memory "
1793 "into secondary processes\n");
1796 test_phys_addrs_available();
1798 fd_hugepage = open(eal_hugepage_data_path(), O_RDONLY);
1799 if (fd_hugepage < 0) {
1800 RTE_LOG(ERR, EAL, "Could not open %s\n",
1801 eal_hugepage_data_path());
1805 size = getFileSize(fd_hugepage);
1806 hp = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd_hugepage, 0);
1807 if (hp == MAP_FAILED) {
1808 RTE_LOG(ERR, EAL, "Could not mmap %s\n",
1809 eal_hugepage_data_path());
1813 num_hp = size / sizeof(struct hugepage_file);
1814 RTE_LOG(DEBUG, EAL, "Analysing %u files\n", num_hp);
1816 /* map all segments into memory to make sure we get the addrs. the
1817 * segments themselves are already in memseg list (which is shared and
1818 * has its VA space already preallocated), so we just need to map
1819 * everything into correct addresses.
1821 for (i = 0; i < num_hp; i++) {
1822 struct hugepage_file *hf = &hp[i];
1823 size_t map_sz = hf->size;
1824 void *map_addr = hf->final_va;
1825 int msl_idx, ms_idx;
1826 struct rte_memseg_list *msl;
1827 struct rte_memseg *ms;
1829 /* if size is zero, no more pages left */
1833 fd = open(hf->filepath, O_RDWR);
1835 RTE_LOG(ERR, EAL, "Could not open %s: %s\n",
1836 hf->filepath, strerror(errno));
1840 map_addr = mmap(map_addr, map_sz, PROT_READ | PROT_WRITE,
1841 MAP_SHARED | MAP_FIXED, fd, 0);
1842 if (map_addr == MAP_FAILED) {
1843 RTE_LOG(ERR, EAL, "Could not map %s: %s\n",
1844 hf->filepath, strerror(errno));
1848 /* set shared lock on the file. */
1849 if (flock(fd, LOCK_SH) < 0) {
1850 RTE_LOG(DEBUG, EAL, "%s(): Locking file failed: %s\n",
1851 __func__, strerror(errno));
1855 /* find segment data */
1856 msl = rte_mem_virt2memseg_list(map_addr);
1858 RTE_LOG(DEBUG, EAL, "%s(): Cannot find memseg list\n",
1862 ms = rte_mem_virt2memseg(map_addr, msl);
1864 RTE_LOG(DEBUG, EAL, "%s(): Cannot find memseg\n",
1869 msl_idx = msl - mcfg->memsegs;
1870 ms_idx = rte_fbarray_find_idx(&msl->memseg_arr, ms);
1872 RTE_LOG(DEBUG, EAL, "%s(): Cannot find memseg idx\n",
1877 /* store segment fd internally */
1878 if (eal_memalloc_set_seg_fd(msl_idx, ms_idx, fd) < 0)
1879 RTE_LOG(ERR, EAL, "Could not store segment fd: %s\n",
1880 rte_strerror(rte_errno));
1882 /* unmap the hugepage config file, since we are done using it */
1890 /* map all segments into memory to make sure we get the addrs */
1892 for (cur_seg = 0; cur_seg < i; cur_seg++) {
1893 struct hugepage_file *hf = &hp[i];
1894 size_t map_sz = hf->size;
1895 void *map_addr = hf->final_va;
1897 munmap(map_addr, map_sz);
1899 if (hp != NULL && hp != MAP_FAILED)
1901 if (fd_hugepage >= 0)
1907 eal_hugepage_attach(void)
1909 if (eal_memalloc_sync_with_primary()) {
1910 RTE_LOG(ERR, EAL, "Could not map memory from primary process\n");
1911 if (aslr_enabled() > 0)
1912 RTE_LOG(ERR, EAL, "It is recommended to disable ASLR in the kernel and retry running both primary and secondary processes\n");
1919 rte_eal_hugepage_init(void)
1921 return internal_config.legacy_mem ?
1922 eal_legacy_hugepage_init() :
1923 eal_hugepage_init();
1927 rte_eal_hugepage_attach(void)
1929 return internal_config.legacy_mem ?
1930 eal_legacy_hugepage_attach() :
1931 eal_hugepage_attach();
1935 rte_eal_using_phys_addrs(void)
1937 return phys_addrs_available;
1940 static int __rte_unused
1941 memseg_primary_init_32(void)
1943 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
1944 int active_sockets, hpi_idx, msl_idx = 0;
1945 unsigned int socket_id, i;
1946 struct rte_memseg_list *msl;
1947 uint64_t extra_mem_per_socket, total_extra_mem, total_requested_mem;
1950 /* no-huge does not need this at all */
1951 if (internal_config.no_hugetlbfs)
1954 /* this is a giant hack, but desperate times call for desperate
1955 * measures. in legacy 32-bit mode, we cannot preallocate VA space,
1956 * because having upwards of 2 gigabytes of VA space already mapped will
1957 * interfere with our ability to map and sort hugepages.
1959 * therefore, in legacy 32-bit mode, we will be initializing memseg
1960 * lists much later - in eal_memory.c, right after we unmap all the
1961 * unneeded pages. this will not affect secondary processes, as those
1962 * should be able to mmap the space without (too many) problems.
1964 if (internal_config.legacy_mem)
1967 /* 32-bit mode is a very special case. we cannot know in advance where
1968 * the user will want to allocate their memory, so we have to do some
1972 total_requested_mem = 0;
1973 if (internal_config.force_sockets)
1974 for (i = 0; i < rte_socket_count(); i++) {
1977 socket_id = rte_socket_id_by_idx(i);
1978 mem = internal_config.socket_mem[socket_id];
1984 total_requested_mem += mem;
1987 total_requested_mem = internal_config.memory;
1989 max_mem = (uint64_t)RTE_MAX_MEM_MB << 20;
1990 if (total_requested_mem > max_mem) {
1991 RTE_LOG(ERR, EAL, "Invalid parameters: 32-bit process can at most use %uM of memory\n",
1992 (unsigned int)(max_mem >> 20));
1995 total_extra_mem = max_mem - total_requested_mem;
1996 extra_mem_per_socket = active_sockets == 0 ? total_extra_mem :
1997 total_extra_mem / active_sockets;
1999 /* the allocation logic is a little bit convoluted, but here's how it
2000 * works, in a nutshell:
2001 * - if user hasn't specified on which sockets to allocate memory via
2002 * --socket-mem, we allocate all of our memory on master core socket.
2003 * - if user has specified sockets to allocate memory on, there may be
2004 * some "unused" memory left (e.g. if user has specified --socket-mem
2005 * such that not all memory adds up to 2 gigabytes), so add it to all
2006 * sockets that are in use equally.
2008 * page sizes are sorted by size in descending order, so we can safely
2009 * assume that we dispense with bigger page sizes first.
2012 /* create memseg lists */
2013 for (i = 0; i < rte_socket_count(); i++) {
2014 int hp_sizes = (int) internal_config.num_hugepage_sizes;
2015 uint64_t max_socket_mem, cur_socket_mem;
2016 unsigned int master_lcore_socket;
2017 struct rte_config *cfg = rte_eal_get_configuration();
2020 socket_id = rte_socket_id_by_idx(i);
2022 #ifndef RTE_EAL_NUMA_AWARE_HUGEPAGES
2027 /* if we didn't specifically request memory on this socket */
2028 skip = active_sockets != 0 &&
2029 internal_config.socket_mem[socket_id] == 0;
2030 /* ...or if we didn't specifically request memory on *any*
2031 * socket, and this is not master lcore
2033 master_lcore_socket = rte_lcore_to_socket_id(cfg->master_lcore);
2034 skip |= active_sockets == 0 && socket_id != master_lcore_socket;
2037 RTE_LOG(DEBUG, EAL, "Will not preallocate memory on socket %u\n",
2042 /* max amount of memory on this socket */
2043 max_socket_mem = (active_sockets != 0 ?
2044 internal_config.socket_mem[socket_id] :
2045 internal_config.memory) +
2046 extra_mem_per_socket;
2049 for (hpi_idx = 0; hpi_idx < hp_sizes; hpi_idx++) {
2050 uint64_t max_pagesz_mem, cur_pagesz_mem = 0;
2051 uint64_t hugepage_sz;
2052 struct hugepage_info *hpi;
2053 int type_msl_idx, max_segs, total_segs = 0;
2055 hpi = &internal_config.hugepage_info[hpi_idx];
2056 hugepage_sz = hpi->hugepage_sz;
2058 /* check if pages are actually available */
2059 if (hpi->num_pages[socket_id] == 0)
2062 max_segs = RTE_MAX_MEMSEG_PER_TYPE;
2063 max_pagesz_mem = max_socket_mem - cur_socket_mem;
2065 /* make it multiple of page size */
2066 max_pagesz_mem = RTE_ALIGN_FLOOR(max_pagesz_mem,
2069 RTE_LOG(DEBUG, EAL, "Attempting to preallocate "
2070 "%" PRIu64 "M on socket %i\n",
2071 max_pagesz_mem >> 20, socket_id);
2074 while (cur_pagesz_mem < max_pagesz_mem &&
2075 total_segs < max_segs) {
2077 unsigned int n_segs;
2079 if (msl_idx >= RTE_MAX_MEMSEG_LISTS) {
2081 "No more space in memseg lists, please increase %s\n",
2082 RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
2086 msl = &mcfg->memsegs[msl_idx];
2088 cur_mem = get_mem_amount(hugepage_sz,
2090 n_segs = cur_mem / hugepage_sz;
2092 if (alloc_memseg_list(msl, hugepage_sz, n_segs,
2093 socket_id, type_msl_idx)) {
2094 /* failing to allocate a memseg list is
2097 RTE_LOG(ERR, EAL, "Cannot allocate memseg list\n");
2101 if (alloc_va_space(msl)) {
2102 /* if we couldn't allocate VA space, we
2103 * can try with smaller page sizes.
2105 RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list, retrying with different page size\n");
2106 /* deallocate memseg list */
2107 if (free_memseg_list(msl))
2112 total_segs += msl->memseg_arr.len;
2113 cur_pagesz_mem = total_segs * hugepage_sz;
2117 cur_socket_mem += cur_pagesz_mem;
2119 if (cur_socket_mem == 0) {
2120 RTE_LOG(ERR, EAL, "Cannot allocate VA space on socket %u\n",
2129 static int __rte_unused
2130 memseg_primary_init(void)
2132 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
2133 int i, socket_id, hpi_idx, msl_idx = 0;
2134 struct rte_memseg_list *msl;
2135 uint64_t max_mem, total_mem;
2137 /* no-huge does not need this at all */
2138 if (internal_config.no_hugetlbfs)
2141 max_mem = (uint64_t)RTE_MAX_MEM_MB << 20;
2144 /* create memseg lists */
2145 for (hpi_idx = 0; hpi_idx < (int) internal_config.num_hugepage_sizes;
2147 struct hugepage_info *hpi;
2148 uint64_t hugepage_sz;
2150 hpi = &internal_config.hugepage_info[hpi_idx];
2151 hugepage_sz = hpi->hugepage_sz;
2153 for (i = 0; i < (int) rte_socket_count(); i++) {
2154 uint64_t max_type_mem, total_type_mem = 0;
2155 int type_msl_idx, max_segs, total_segs = 0;
2157 socket_id = rte_socket_id_by_idx(i);
2159 #ifndef RTE_EAL_NUMA_AWARE_HUGEPAGES
2164 if (total_mem >= max_mem)
2167 max_type_mem = RTE_MIN(max_mem - total_mem,
2168 (uint64_t)RTE_MAX_MEM_MB_PER_TYPE << 20);
2169 max_segs = RTE_MAX_MEMSEG_PER_TYPE;
2172 while (total_type_mem < max_type_mem &&
2173 total_segs < max_segs) {
2174 uint64_t cur_max_mem, cur_mem;
2175 unsigned int n_segs;
2177 if (msl_idx >= RTE_MAX_MEMSEG_LISTS) {
2179 "No more space in memseg lists, please increase %s\n",
2180 RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
2184 msl = &mcfg->memsegs[msl_idx++];
2186 cur_max_mem = max_type_mem - total_type_mem;
2188 cur_mem = get_mem_amount(hugepage_sz,
2190 n_segs = cur_mem / hugepage_sz;
2192 if (alloc_memseg_list(msl, hugepage_sz, n_segs,
2193 socket_id, type_msl_idx))
2196 total_segs += msl->memseg_arr.len;
2197 total_type_mem = total_segs * hugepage_sz;
2200 if (alloc_va_space(msl)) {
2201 RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list\n");
2205 total_mem += total_type_mem;
2212 memseg_secondary_init(void)
2214 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
2216 struct rte_memseg_list *msl;
2218 for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) {
2220 msl = &mcfg->memsegs[msl_idx];
2222 /* skip empty memseg lists */
2223 if (msl->memseg_arr.len == 0)
2226 if (rte_fbarray_attach(&msl->memseg_arr)) {
2227 RTE_LOG(ERR, EAL, "Cannot attach to primary process memseg lists\n");
2231 /* preallocate VA space */
2232 if (alloc_va_space(msl)) {
2233 RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
2242 rte_eal_memseg_init(void)
2244 /* increase rlimit to maximum */
2247 if (getrlimit(RLIMIT_NOFILE, &lim) == 0) {
2248 /* set limit to maximum */
2249 lim.rlim_cur = lim.rlim_max;
2251 if (setrlimit(RLIMIT_NOFILE, &lim) < 0) {
2252 RTE_LOG(DEBUG, EAL, "Setting maximum number of open files failed: %s\n",
2255 RTE_LOG(DEBUG, EAL, "Setting maximum number of open files to %"
2257 (uint64_t)lim.rlim_cur);
2260 RTE_LOG(ERR, EAL, "Cannot get current resource limits\n");
2263 return rte_eal_process_type() == RTE_PROC_PRIMARY ?
2265 memseg_primary_init_32() :
2267 memseg_primary_init() :
2269 memseg_secondary_init();