1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation.
3 * Copyright(c) 2013 6WIND S.A.
16 #include <sys/types.h>
18 #include <sys/queue.h>
20 #include <sys/resource.h>
23 #include <sys/ioctl.h>
27 #ifdef F_ADD_SEALS /* if file sealing is supported, so is memfd */
28 #include <linux/memfd.h>
29 #define MEMFD_SUPPORTED
31 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
36 #include <rte_errno.h>
38 #include <rte_memory.h>
39 #include <rte_launch.h>
41 #include <rte_per_lcore.h>
42 #include <rte_lcore.h>
43 #include <rte_common.h>
44 #include <rte_string_fns.h>
46 #include "eal_private.h"
47 #include "eal_memalloc.h"
48 #include "eal_memcfg.h"
49 #include "eal_internal_cfg.h"
50 #include "eal_filesystem.h"
51 #include "eal_hugepages.h"
52 #include "eal_options.h"
54 #define PFN_MASK_SIZE 8
58 * Huge page mapping under linux
60 * To reserve a big contiguous amount of memory, we use the hugepage
61 * feature of linux. For that, we need to have hugetlbfs mounted. This
62 * code will create many files in this directory (one per page) and
63 * map them in virtual memory. For each page, we will retrieve its
64 * physical address and remap it in order to have a virtual contiguous
65 * zone as well as a physical contiguous zone.
68 static int phys_addrs_available = -1;
70 #define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space"
72 uint64_t eal_get_baseaddr(void)
75 * Linux kernel uses a really high address as starting address for
76 * serving mmaps calls. If there exists addressing limitations and IOVA
77 * mode is VA, this starting address is likely too high for those
78 * devices. However, it is possible to use a lower address in the
79 * process virtual address space as with 64 bits there is a lot of
82 * Current known limitations are 39 or 40 bits. Setting the starting
83 * address at 4GB implies there are 508GB or 1020GB for mapping the
84 * available hugepages. This is likely enough for most systems, although
85 * a device with addressing limitations should call
86 * rte_mem_check_dma_mask for ensuring all memory is within supported
89 return 0x100000000ULL;
93 * Get physical address of any mapped virtual address in the current process.
96 rte_mem_virt2phy(const void *virtaddr)
99 uint64_t page, physaddr;
100 unsigned long virt_pfn;
104 if (phys_addrs_available == 0)
107 /* standard page size */
108 page_size = getpagesize();
110 fd = open("/proc/self/pagemap", O_RDONLY);
112 RTE_LOG(INFO, 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(INFO, 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(INFO, EAL, "%s(): cannot read /proc/self/pagemap: %s\n",
130 __func__, strerror(errno));
132 } else if (retval != PFN_MASK_SIZE) {
133 RTE_LOG(INFO, 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, eal_get_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, 0600);
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_PPC_64
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 memseg_list_free(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));
816 memseg_list_init(struct rte_memseg_list *msl, uint64_t page_sz,
817 int n_segs, int socket_id, int type_msl_idx)
819 return eal_memseg_list_init(
820 msl, page_sz, n_segs, socket_id, type_msl_idx, true);
824 memseg_list_alloc(struct rte_memseg_list *msl)
826 return eal_memseg_list_alloc(msl, 0);
830 * Our VA space is not preallocated yet, so preallocate it here. We need to know
831 * how many segments there are in order to map all pages into one address space,
832 * and leave appropriate holes between segments so that rte_malloc does not
833 * concatenate them into one big segment.
835 * we also need to unmap original pages to free up address space.
837 static int __rte_unused
838 prealloc_segments(struct hugepage_file *hugepages, int n_pages)
840 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
841 int cur_page, seg_start_page, end_seg, new_memseg;
842 unsigned int hpi_idx, socket, i;
843 int n_contig_segs, n_segs;
846 /* before we preallocate segments, we need to free up our VA space.
847 * we're not removing files, and we already have information about
848 * PA-contiguousness, so it is safe to unmap everything.
850 for (cur_page = 0; cur_page < n_pages; cur_page++) {
851 struct hugepage_file *hpi = &hugepages[cur_page];
852 munmap(hpi->orig_va, hpi->size);
856 /* we cannot know how many page sizes and sockets we have discovered, so
857 * loop over all of them
859 for (hpi_idx = 0; hpi_idx < internal_config.num_hugepage_sizes;
862 internal_config.hugepage_info[hpi_idx].hugepage_sz;
864 for (i = 0; i < rte_socket_count(); i++) {
865 struct rte_memseg_list *msl;
867 socket = rte_socket_id_by_idx(i);
872 for (cur_page = 0; cur_page < n_pages; cur_page++) {
873 struct hugepage_file *prev, *cur;
874 int prev_seg_start_page = -1;
876 cur = &hugepages[cur_page];
877 prev = cur_page == 0 ? NULL :
878 &hugepages[cur_page - 1];
885 else if (cur->socket_id != (int) socket)
887 else if (cur->size != page_sz)
889 else if (cur_page == 0)
891 #ifdef RTE_ARCH_PPC_64
892 /* On PPC64 architecture, the mmap always start
893 * from higher address to lower address. Here,
894 * physical addresses are in descending order.
896 else if ((prev->physaddr - cur->physaddr) !=
900 else if ((cur->physaddr - prev->physaddr) !=
905 /* if we're already inside a segment,
906 * new segment means end of current one
908 if (seg_start_page != -1) {
910 prev_seg_start_page =
913 seg_start_page = cur_page;
917 if (prev_seg_start_page != -1) {
918 /* we've found a new segment */
922 } else if (seg_start_page != -1) {
923 /* we didn't find new segment,
924 * but did end current one
932 /* we're skipping this page */
936 /* segment continues */
938 /* check if we missed last segment */
939 if (seg_start_page != -1) {
941 n_segs += cur_page - seg_start_page;
944 /* if no segments were found, do not preallocate */
948 /* we now have total number of pages that we will
949 * allocate for this segment list. add separator pages
950 * to the total count, and preallocate VA space.
952 n_segs += n_contig_segs - 1;
954 /* now, preallocate VA space for these segments */
956 /* first, find suitable memseg list for this */
957 for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS;
959 msl = &mcfg->memsegs[msl_idx];
961 if (msl->base_va != NULL)
965 if (msl_idx == RTE_MAX_MEMSEG_LISTS) {
966 RTE_LOG(ERR, EAL, "Not enough space in memseg lists, please increase %s\n",
967 RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
971 /* now, allocate fbarray itself */
972 if (memseg_list_init(msl, page_sz, n_segs, socket,
976 /* finally, allocate VA space */
977 if (memseg_list_alloc(msl) < 0) {
978 RTE_LOG(ERR, EAL, "Cannot preallocate 0x%"PRIx64"kB hugepages\n",
988 * We cannot reallocate memseg lists on the fly because PPC64 stores pages
989 * backwards, therefore we have to process the entire memseg first before
990 * remapping it into memseg list VA space.
993 remap_needed_hugepages(struct hugepage_file *hugepages, int n_pages)
995 int cur_page, seg_start_page, new_memseg, ret;
998 for (cur_page = 0; cur_page < n_pages; cur_page++) {
999 struct hugepage_file *prev, *cur;
1003 cur = &hugepages[cur_page];
1004 prev = cur_page == 0 ? NULL : &hugepages[cur_page - 1];
1006 /* if size is zero, no more pages left */
1012 else if (cur->socket_id != prev->socket_id)
1014 else if (cur->size != prev->size)
1016 #ifdef RTE_ARCH_PPC_64
1017 /* On PPC64 architecture, the mmap always start from higher
1018 * address to lower address. Here, physical addresses are in
1021 else if ((prev->physaddr - cur->physaddr) != cur->size)
1024 else if ((cur->physaddr - prev->physaddr) != cur->size)
1029 /* if this isn't the first time, remap segment */
1030 if (cur_page != 0) {
1031 ret = remap_segment(hugepages, seg_start_page,
1036 /* remember where we started */
1037 seg_start_page = cur_page;
1039 /* continuation of previous memseg */
1041 /* we were stopped, but we didn't remap the last segment, do it now */
1042 if (cur_page != 0) {
1043 ret = remap_segment(hugepages, seg_start_page,
1051 __rte_unused /* function is unused on 32-bit builds */
1052 static inline uint64_t
1053 get_socket_mem_size(int socket)
1058 for (i = 0; i < internal_config.num_hugepage_sizes; i++){
1059 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
1060 size += hpi->hugepage_sz * hpi->num_pages[socket];
1067 * This function is a NUMA-aware equivalent of calc_num_pages.
1068 * It takes in the list of hugepage sizes and the
1069 * number of pages thereof, and calculates the best number of
1070 * pages of each size to fulfill the request for <memory> ram
1073 calc_num_pages_per_socket(uint64_t * memory,
1074 struct hugepage_info *hp_info,
1075 struct hugepage_info *hp_used,
1076 unsigned num_hp_info)
1078 unsigned socket, j, i = 0;
1079 unsigned requested, available;
1080 int total_num_pages = 0;
1081 uint64_t remaining_mem, cur_mem;
1082 uint64_t total_mem = internal_config.memory;
1084 if (num_hp_info == 0)
1087 /* if specific memory amounts per socket weren't requested */
1088 if (internal_config.force_sockets == 0) {
1091 int cpu_per_socket[RTE_MAX_NUMA_NODES];
1092 size_t default_size;
1095 /* Compute number of cores per socket */
1096 memset(cpu_per_socket, 0, sizeof(cpu_per_socket));
1097 RTE_LCORE_FOREACH(lcore_id) {
1098 cpu_per_socket[rte_lcore_to_socket_id(lcore_id)]++;
1102 * Automatically spread requested memory amongst detected sockets according
1103 * to number of cores from cpu mask present on each socket
1105 total_size = internal_config.memory;
1106 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0; socket++) {
1108 /* Set memory amount per socket */
1109 default_size = (internal_config.memory * cpu_per_socket[socket])
1110 / rte_lcore_count();
1112 /* Limit to maximum available memory on socket */
1113 default_size = RTE_MIN(default_size, get_socket_mem_size(socket));
1116 memory[socket] = default_size;
1117 total_size -= default_size;
1121 * If some memory is remaining, try to allocate it by getting all
1122 * available memory from sockets, one after the other
1124 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0; socket++) {
1125 /* take whatever is available */
1126 default_size = RTE_MIN(get_socket_mem_size(socket) - memory[socket],
1130 memory[socket] += default_size;
1131 total_size -= default_size;
1134 /* in 32-bit mode, allocate all of the memory only on master
1137 total_size = internal_config.memory;
1138 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0;
1140 struct rte_config *cfg = rte_eal_get_configuration();
1141 unsigned int master_lcore_socket;
1143 master_lcore_socket =
1144 rte_lcore_to_socket_id(cfg->master_lcore);
1146 if (master_lcore_socket != socket)
1150 memory[socket] = total_size;
1156 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_mem != 0; socket++) {
1157 /* skips if the memory on specific socket wasn't requested */
1158 for (i = 0; i < num_hp_info && memory[socket] != 0; i++){
1159 strlcpy(hp_used[i].hugedir, hp_info[i].hugedir,
1160 sizeof(hp_used[i].hugedir));
1161 hp_used[i].num_pages[socket] = RTE_MIN(
1162 memory[socket] / hp_info[i].hugepage_sz,
1163 hp_info[i].num_pages[socket]);
1165 cur_mem = hp_used[i].num_pages[socket] *
1166 hp_used[i].hugepage_sz;
1168 memory[socket] -= cur_mem;
1169 total_mem -= cur_mem;
1171 total_num_pages += hp_used[i].num_pages[socket];
1173 /* check if we have met all memory requests */
1174 if (memory[socket] == 0)
1177 /* check if we have any more pages left at this size, if so
1178 * move on to next size */
1179 if (hp_used[i].num_pages[socket] == hp_info[i].num_pages[socket])
1181 /* At this point we know that there are more pages available that are
1182 * bigger than the memory we want, so lets see if we can get enough
1183 * from other page sizes.
1186 for (j = i+1; j < num_hp_info; j++)
1187 remaining_mem += hp_info[j].hugepage_sz *
1188 hp_info[j].num_pages[socket];
1190 /* is there enough other memory, if not allocate another page and quit */
1191 if (remaining_mem < memory[socket]){
1192 cur_mem = RTE_MIN(memory[socket],
1193 hp_info[i].hugepage_sz);
1194 memory[socket] -= cur_mem;
1195 total_mem -= cur_mem;
1196 hp_used[i].num_pages[socket]++;
1198 break; /* we are done with this socket*/
1201 /* if we didn't satisfy all memory requirements per socket */
1202 if (memory[socket] > 0 &&
1203 internal_config.socket_mem[socket] != 0) {
1204 /* to prevent icc errors */
1205 requested = (unsigned) (internal_config.socket_mem[socket] /
1207 available = requested -
1208 ((unsigned) (memory[socket] / 0x100000));
1209 RTE_LOG(ERR, EAL, "Not enough memory available on socket %u! "
1210 "Requested: %uMB, available: %uMB\n", socket,
1211 requested, available);
1216 /* if we didn't satisfy total memory requirements */
1217 if (total_mem > 0) {
1218 requested = (unsigned) (internal_config.memory / 0x100000);
1219 available = requested - (unsigned) (total_mem / 0x100000);
1220 RTE_LOG(ERR, EAL, "Not enough memory available! Requested: %uMB,"
1221 " available: %uMB\n", requested, available);
1224 return total_num_pages;
1227 static inline size_t
1228 eal_get_hugepage_mem_size(void)
1233 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
1234 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
1235 if (strnlen(hpi->hugedir, sizeof(hpi->hugedir)) != 0) {
1236 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
1237 size += hpi->hugepage_sz * hpi->num_pages[j];
1242 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
1245 static struct sigaction huge_action_old;
1246 static int huge_need_recover;
1249 huge_register_sigbus(void)
1252 struct sigaction action;
1255 sigaddset(&mask, SIGBUS);
1256 action.sa_flags = 0;
1257 action.sa_mask = mask;
1258 action.sa_handler = huge_sigbus_handler;
1260 huge_need_recover = !sigaction(SIGBUS, &action, &huge_action_old);
1264 huge_recover_sigbus(void)
1266 if (huge_need_recover) {
1267 sigaction(SIGBUS, &huge_action_old, NULL);
1268 huge_need_recover = 0;
1273 * Prepare physical memory mapping: fill configuration structure with
1274 * these infos, return 0 on success.
1275 * 1. map N huge pages in separate files in hugetlbfs
1276 * 2. find associated physical addr
1277 * 3. find associated NUMA socket ID
1278 * 4. sort all huge pages by physical address
1279 * 5. remap these N huge pages in the correct order
1280 * 6. unmap the first mapping
1281 * 7. fill memsegs in configuration with contiguous zones
1284 eal_legacy_hugepage_init(void)
1286 struct rte_mem_config *mcfg;
1287 struct hugepage_file *hugepage = NULL, *tmp_hp = NULL;
1288 struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES];
1290 uint64_t memory[RTE_MAX_NUMA_NODES];
1294 int nr_hugefiles, nr_hugepages = 0;
1297 memset(used_hp, 0, sizeof(used_hp));
1299 /* get pointer to global configuration */
1300 mcfg = rte_eal_get_configuration()->mem_config;
1302 /* hugetlbfs can be disabled */
1303 if (internal_config.no_hugetlbfs) {
1304 void *prealloc_addr;
1306 struct rte_memseg_list *msl;
1307 int n_segs, fd, flags;
1308 #ifdef MEMFD_SUPPORTED
1313 /* nohuge mode is legacy mode */
1314 internal_config.legacy_mem = 1;
1316 /* nohuge mode is single-file segments mode */
1317 internal_config.single_file_segments = 1;
1319 /* create a memseg list */
1320 msl = &mcfg->memsegs[0];
1322 mem_sz = internal_config.memory;
1323 page_sz = RTE_PGSIZE_4K;
1324 n_segs = mem_sz / page_sz;
1326 if (eal_memseg_list_init_named(
1327 msl, "nohugemem", page_sz, n_segs, 0, true)) {
1331 /* set up parameters for anonymous mmap */
1333 flags = MAP_PRIVATE | MAP_ANONYMOUS;
1335 #ifdef MEMFD_SUPPORTED
1336 /* create a memfd and store it in the segment fd table */
1337 memfd = memfd_create("nohuge", 0);
1339 RTE_LOG(DEBUG, EAL, "Cannot create memfd: %s\n",
1341 RTE_LOG(DEBUG, EAL, "Falling back to anonymous map\n");
1343 /* we got an fd - now resize it */
1344 if (ftruncate(memfd, internal_config.memory) < 0) {
1345 RTE_LOG(ERR, EAL, "Cannot resize memfd: %s\n",
1347 RTE_LOG(ERR, EAL, "Falling back to anonymous map\n");
1350 /* creating memfd-backed file was successful.
1351 * we want changes to memfd to be visible to
1352 * other processes (such as vhost backend), so
1353 * map it as shared memory.
1355 RTE_LOG(DEBUG, EAL, "Using memfd for anonymous memory\n");
1361 /* preallocate address space for the memory, so that it can be
1362 * fit into the DMA mask.
1364 if (eal_memseg_list_alloc(msl, 0)) {
1365 RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
1369 prealloc_addr = msl->base_va;
1370 addr = mmap(prealloc_addr, mem_sz, PROT_READ | PROT_WRITE,
1371 flags | MAP_FIXED, fd, 0);
1372 if (addr == MAP_FAILED || addr != prealloc_addr) {
1373 RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__,
1375 munmap(prealloc_addr, mem_sz);
1379 /* we're in single-file segments mode, so only the segment list
1380 * fd needs to be set up.
1383 if (eal_memalloc_set_seg_list_fd(0, fd) < 0) {
1384 RTE_LOG(ERR, EAL, "Cannot set up segment list fd\n");
1385 /* not a serious error, proceed */
1389 eal_memseg_list_populate(msl, addr, n_segs);
1391 if (mcfg->dma_maskbits &&
1392 rte_mem_check_dma_mask_thread_unsafe(mcfg->dma_maskbits)) {
1394 "%s(): couldn't allocate memory due to IOVA exceeding limits of current DMA mask.\n",
1396 if (rte_eal_iova_mode() == RTE_IOVA_VA &&
1397 rte_eal_using_phys_addrs())
1399 "%s(): Please try initializing EAL with --iova-mode=pa parameter.\n",
1406 /* calculate total number of hugepages available. at this point we haven't
1407 * yet started sorting them so they all are on socket 0 */
1408 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) {
1409 /* meanwhile, also initialize used_hp hugepage sizes in used_hp */
1410 used_hp[i].hugepage_sz = internal_config.hugepage_info[i].hugepage_sz;
1412 nr_hugepages += internal_config.hugepage_info[i].num_pages[0];
1416 * allocate a memory area for hugepage table.
1417 * this isn't shared memory yet. due to the fact that we need some
1418 * processing done on these pages, shared memory will be created
1421 tmp_hp = malloc(nr_hugepages * sizeof(struct hugepage_file));
1425 memset(tmp_hp, 0, nr_hugepages * sizeof(struct hugepage_file));
1427 hp_offset = 0; /* where we start the current page size entries */
1429 huge_register_sigbus();
1431 /* make a copy of socket_mem, needed for balanced allocation. */
1432 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
1433 memory[i] = internal_config.socket_mem[i];
1435 /* map all hugepages and sort them */
1436 for (i = 0; i < (int)internal_config.num_hugepage_sizes; i ++){
1437 unsigned pages_old, pages_new;
1438 struct hugepage_info *hpi;
1441 * we don't yet mark hugepages as used at this stage, so
1442 * we just map all hugepages available to the system
1443 * all hugepages are still located on socket 0
1445 hpi = &internal_config.hugepage_info[i];
1447 if (hpi->num_pages[0] == 0)
1450 /* map all hugepages available */
1451 pages_old = hpi->num_pages[0];
1452 pages_new = map_all_hugepages(&tmp_hp[hp_offset], hpi, memory);
1453 if (pages_new < pages_old) {
1455 "%d not %d hugepages of size %u MB allocated\n",
1456 pages_new, pages_old,
1457 (unsigned)(hpi->hugepage_sz / 0x100000));
1459 int pages = pages_old - pages_new;
1461 nr_hugepages -= pages;
1462 hpi->num_pages[0] = pages_new;
1467 if (rte_eal_using_phys_addrs() &&
1468 rte_eal_iova_mode() != RTE_IOVA_VA) {
1469 /* find physical addresses for each hugepage */
1470 if (find_physaddrs(&tmp_hp[hp_offset], hpi) < 0) {
1471 RTE_LOG(DEBUG, EAL, "Failed to find phys addr "
1472 "for %u MB pages\n",
1473 (unsigned int)(hpi->hugepage_sz / 0x100000));
1477 /* set physical addresses for each hugepage */
1478 if (set_physaddrs(&tmp_hp[hp_offset], hpi) < 0) {
1479 RTE_LOG(DEBUG, EAL, "Failed to set phys addr "
1480 "for %u MB pages\n",
1481 (unsigned int)(hpi->hugepage_sz / 0x100000));
1486 if (find_numasocket(&tmp_hp[hp_offset], hpi) < 0){
1487 RTE_LOG(DEBUG, EAL, "Failed to find NUMA socket for %u MB pages\n",
1488 (unsigned)(hpi->hugepage_sz / 0x100000));
1492 qsort(&tmp_hp[hp_offset], hpi->num_pages[0],
1493 sizeof(struct hugepage_file), cmp_physaddr);
1495 /* we have processed a num of hugepages of this size, so inc offset */
1496 hp_offset += hpi->num_pages[0];
1499 huge_recover_sigbus();
1501 if (internal_config.memory == 0 && internal_config.force_sockets == 0)
1502 internal_config.memory = eal_get_hugepage_mem_size();
1504 nr_hugefiles = nr_hugepages;
1507 /* clean out the numbers of pages */
1508 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++)
1509 for (j = 0; j < RTE_MAX_NUMA_NODES; j++)
1510 internal_config.hugepage_info[i].num_pages[j] = 0;
1512 /* get hugepages for each socket */
1513 for (i = 0; i < nr_hugefiles; i++) {
1514 int socket = tmp_hp[i].socket_id;
1516 /* find a hugepage info with right size and increment num_pages */
1517 const int nb_hpsizes = RTE_MIN(MAX_HUGEPAGE_SIZES,
1518 (int)internal_config.num_hugepage_sizes);
1519 for (j = 0; j < nb_hpsizes; j++) {
1520 if (tmp_hp[i].size ==
1521 internal_config.hugepage_info[j].hugepage_sz) {
1522 internal_config.hugepage_info[j].num_pages[socket]++;
1527 /* make a copy of socket_mem, needed for number of pages calculation */
1528 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
1529 memory[i] = internal_config.socket_mem[i];
1531 /* calculate final number of pages */
1532 nr_hugepages = calc_num_pages_per_socket(memory,
1533 internal_config.hugepage_info, used_hp,
1534 internal_config.num_hugepage_sizes);
1536 /* error if not enough memory available */
1537 if (nr_hugepages < 0)
1541 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) {
1542 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
1543 if (used_hp[i].num_pages[j] > 0) {
1545 "Requesting %u pages of size %uMB"
1546 " from socket %i\n",
1547 used_hp[i].num_pages[j],
1549 (used_hp[i].hugepage_sz / 0x100000),
1555 /* create shared memory */
1556 hugepage = create_shared_memory(eal_hugepage_data_path(),
1557 nr_hugefiles * sizeof(struct hugepage_file));
1559 if (hugepage == NULL) {
1560 RTE_LOG(ERR, EAL, "Failed to create shared memory!\n");
1563 memset(hugepage, 0, nr_hugefiles * sizeof(struct hugepage_file));
1566 * unmap pages that we won't need (looks at used_hp).
1567 * also, sets final_va to NULL on pages that were unmapped.
1569 if (unmap_unneeded_hugepages(tmp_hp, used_hp,
1570 internal_config.num_hugepage_sizes) < 0) {
1571 RTE_LOG(ERR, EAL, "Unmapping and locking hugepages failed!\n");
1576 * copy stuff from malloc'd hugepage* to the actual shared memory.
1577 * this procedure only copies those hugepages that have orig_va
1578 * not NULL. has overflow protection.
1580 if (copy_hugepages_to_shared_mem(hugepage, nr_hugefiles,
1581 tmp_hp, nr_hugefiles) < 0) {
1582 RTE_LOG(ERR, EAL, "Copying tables to shared memory failed!\n");
1587 /* for legacy 32-bit mode, we did not preallocate VA space, so do it */
1588 if (internal_config.legacy_mem &&
1589 prealloc_segments(hugepage, nr_hugefiles)) {
1590 RTE_LOG(ERR, EAL, "Could not preallocate VA space for hugepages\n");
1595 /* remap all pages we do need into memseg list VA space, so that those
1596 * pages become first-class citizens in DPDK memory subsystem
1598 if (remap_needed_hugepages(hugepage, nr_hugefiles)) {
1599 RTE_LOG(ERR, EAL, "Couldn't remap hugepage files into memseg lists\n");
1603 /* free the hugepage backing files */
1604 if (internal_config.hugepage_unlink &&
1605 unlink_hugepage_files(tmp_hp, internal_config.num_hugepage_sizes) < 0) {
1606 RTE_LOG(ERR, EAL, "Unlinking hugepage files failed!\n");
1610 /* free the temporary hugepage table */
1614 munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file));
1617 /* we're not going to allocate more pages, so release VA space for
1618 * unused memseg lists
1620 for (i = 0; i < RTE_MAX_MEMSEG_LISTS; i++) {
1621 struct rte_memseg_list *msl = &mcfg->memsegs[i];
1624 /* skip inactive lists */
1625 if (msl->base_va == NULL)
1627 /* skip lists where there is at least one page allocated */
1628 if (msl->memseg_arr.count > 0)
1630 /* this is an unused list, deallocate it */
1632 munmap(msl->base_va, mem_sz);
1633 msl->base_va = NULL;
1636 /* destroy backing fbarray */
1637 rte_fbarray_destroy(&msl->memseg_arr);
1640 if (mcfg->dma_maskbits &&
1641 rte_mem_check_dma_mask_thread_unsafe(mcfg->dma_maskbits)) {
1643 "%s(): couldn't allocate memory due to IOVA exceeding limits of current DMA mask.\n",
1651 huge_recover_sigbus();
1653 if (hugepage != NULL)
1654 munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file));
1659 static int __rte_unused
1660 hugepage_count_walk(const struct rte_memseg_list *msl, void *arg)
1662 struct hugepage_info *hpi = arg;
1664 if (msl->page_sz != hpi->hugepage_sz)
1667 hpi->num_pages[msl->socket_id] += msl->memseg_arr.len;
1672 limits_callback(int socket_id, size_t cur_limit, size_t new_len)
1674 RTE_SET_USED(socket_id);
1675 RTE_SET_USED(cur_limit);
1676 RTE_SET_USED(new_len);
1681 eal_hugepage_init(void)
1683 struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES];
1684 uint64_t memory[RTE_MAX_NUMA_NODES];
1685 int hp_sz_idx, socket_id;
1687 memset(used_hp, 0, sizeof(used_hp));
1690 hp_sz_idx < (int) internal_config.num_hugepage_sizes;
1693 struct hugepage_info dummy;
1696 /* also initialize used_hp hugepage sizes in used_hp */
1697 struct hugepage_info *hpi;
1698 hpi = &internal_config.hugepage_info[hp_sz_idx];
1699 used_hp[hp_sz_idx].hugepage_sz = hpi->hugepage_sz;
1702 /* for 32-bit, limit number of pages on socket to whatever we've
1703 * preallocated, as we cannot allocate more.
1705 memset(&dummy, 0, sizeof(dummy));
1706 dummy.hugepage_sz = hpi->hugepage_sz;
1707 if (rte_memseg_list_walk(hugepage_count_walk, &dummy) < 0)
1710 for (i = 0; i < RTE_DIM(dummy.num_pages); i++) {
1711 hpi->num_pages[i] = RTE_MIN(hpi->num_pages[i],
1712 dummy.num_pages[i]);
1717 /* make a copy of socket_mem, needed for balanced allocation. */
1718 for (hp_sz_idx = 0; hp_sz_idx < RTE_MAX_NUMA_NODES; hp_sz_idx++)
1719 memory[hp_sz_idx] = internal_config.socket_mem[hp_sz_idx];
1721 /* calculate final number of pages */
1722 if (calc_num_pages_per_socket(memory,
1723 internal_config.hugepage_info, used_hp,
1724 internal_config.num_hugepage_sizes) < 0)
1728 hp_sz_idx < (int)internal_config.num_hugepage_sizes;
1730 for (socket_id = 0; socket_id < RTE_MAX_NUMA_NODES;
1732 struct rte_memseg **pages;
1733 struct hugepage_info *hpi = &used_hp[hp_sz_idx];
1734 unsigned int num_pages = hpi->num_pages[socket_id];
1735 unsigned int num_pages_alloc;
1740 RTE_LOG(DEBUG, EAL, "Allocating %u pages of size %" PRIu64 "M on socket %i\n",
1741 num_pages, hpi->hugepage_sz >> 20, socket_id);
1743 /* we may not be able to allocate all pages in one go,
1744 * because we break up our memory map into multiple
1745 * memseg lists. therefore, try allocating multiple
1746 * times and see if we can get the desired number of
1747 * pages from multiple allocations.
1750 num_pages_alloc = 0;
1752 int i, cur_pages, needed;
1754 needed = num_pages - num_pages_alloc;
1756 pages = malloc(sizeof(*pages) * needed);
1758 /* do not request exact number of pages */
1759 cur_pages = eal_memalloc_alloc_seg_bulk(pages,
1760 needed, hpi->hugepage_sz,
1762 if (cur_pages <= 0) {
1767 /* mark preallocated pages as unfreeable */
1768 for (i = 0; i < cur_pages; i++) {
1769 struct rte_memseg *ms = pages[i];
1770 ms->flags |= RTE_MEMSEG_FLAG_DO_NOT_FREE;
1774 num_pages_alloc += cur_pages;
1775 } while (num_pages_alloc != num_pages);
1778 /* if socket limits were specified, set them */
1779 if (internal_config.force_socket_limits) {
1781 for (i = 0; i < RTE_MAX_NUMA_NODES; i++) {
1782 uint64_t limit = internal_config.socket_limit[i];
1785 if (rte_mem_alloc_validator_register("socket-limit",
1786 limits_callback, i, limit))
1787 RTE_LOG(ERR, EAL, "Failed to register socket limits validator callback\n");
1794 * uses fstat to report the size of a file on disk
1800 if (fstat(fd, &st) < 0)
1806 * This creates the memory mappings in the secondary process to match that of
1807 * the server process. It goes through each memory segment in the DPDK runtime
1808 * configuration and finds the hugepages which form that segment, mapping them
1809 * in order to form a contiguous block in the virtual memory space
1812 eal_legacy_hugepage_attach(void)
1814 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
1815 struct hugepage_file *hp = NULL;
1816 unsigned int num_hp = 0;
1818 unsigned int cur_seg;
1820 int fd, fd_hugepage = -1;
1822 if (aslr_enabled() > 0) {
1823 RTE_LOG(WARNING, EAL, "WARNING: Address Space Layout Randomization "
1824 "(ASLR) is enabled in the kernel.\n");
1825 RTE_LOG(WARNING, EAL, " This may cause issues with mapping memory "
1826 "into secondary processes\n");
1829 fd_hugepage = open(eal_hugepage_data_path(), O_RDONLY);
1830 if (fd_hugepage < 0) {
1831 RTE_LOG(ERR, EAL, "Could not open %s\n",
1832 eal_hugepage_data_path());
1836 size = getFileSize(fd_hugepage);
1837 hp = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd_hugepage, 0);
1838 if (hp == MAP_FAILED) {
1839 RTE_LOG(ERR, EAL, "Could not mmap %s\n",
1840 eal_hugepage_data_path());
1844 num_hp = size / sizeof(struct hugepage_file);
1845 RTE_LOG(DEBUG, EAL, "Analysing %u files\n", num_hp);
1847 /* map all segments into memory to make sure we get the addrs. the
1848 * segments themselves are already in memseg list (which is shared and
1849 * has its VA space already preallocated), so we just need to map
1850 * everything into correct addresses.
1852 for (i = 0; i < num_hp; i++) {
1853 struct hugepage_file *hf = &hp[i];
1854 size_t map_sz = hf->size;
1855 void *map_addr = hf->final_va;
1856 int msl_idx, ms_idx;
1857 struct rte_memseg_list *msl;
1858 struct rte_memseg *ms;
1860 /* if size is zero, no more pages left */
1864 fd = open(hf->filepath, O_RDWR);
1866 RTE_LOG(ERR, EAL, "Could not open %s: %s\n",
1867 hf->filepath, strerror(errno));
1871 map_addr = mmap(map_addr, map_sz, PROT_READ | PROT_WRITE,
1872 MAP_SHARED | MAP_FIXED, fd, 0);
1873 if (map_addr == MAP_FAILED) {
1874 RTE_LOG(ERR, EAL, "Could not map %s: %s\n",
1875 hf->filepath, strerror(errno));
1879 /* set shared lock on the file. */
1880 if (flock(fd, LOCK_SH) < 0) {
1881 RTE_LOG(DEBUG, EAL, "%s(): Locking file failed: %s\n",
1882 __func__, strerror(errno));
1886 /* find segment data */
1887 msl = rte_mem_virt2memseg_list(map_addr);
1889 RTE_LOG(DEBUG, EAL, "%s(): Cannot find memseg list\n",
1893 ms = rte_mem_virt2memseg(map_addr, msl);
1895 RTE_LOG(DEBUG, EAL, "%s(): Cannot find memseg\n",
1900 msl_idx = msl - mcfg->memsegs;
1901 ms_idx = rte_fbarray_find_idx(&msl->memseg_arr, ms);
1903 RTE_LOG(DEBUG, EAL, "%s(): Cannot find memseg idx\n",
1908 /* store segment fd internally */
1909 if (eal_memalloc_set_seg_fd(msl_idx, ms_idx, fd) < 0)
1910 RTE_LOG(ERR, EAL, "Could not store segment fd: %s\n",
1911 rte_strerror(rte_errno));
1913 /* unmap the hugepage config file, since we are done using it */
1919 munmap(hp[i].final_va, hp[i].size);
1923 /* unwind mmap's done so far */
1924 for (cur_seg = 0; cur_seg < i; cur_seg++)
1925 munmap(hp[cur_seg].final_va, hp[cur_seg].size);
1927 if (hp != NULL && hp != MAP_FAILED)
1929 if (fd_hugepage >= 0)
1935 eal_hugepage_attach(void)
1937 if (eal_memalloc_sync_with_primary()) {
1938 RTE_LOG(ERR, EAL, "Could not map memory from primary process\n");
1939 if (aslr_enabled() > 0)
1940 RTE_LOG(ERR, EAL, "It is recommended to disable ASLR in the kernel and retry running both primary and secondary processes\n");
1947 rte_eal_hugepage_init(void)
1949 return internal_config.legacy_mem ?
1950 eal_legacy_hugepage_init() :
1951 eal_hugepage_init();
1955 rte_eal_hugepage_attach(void)
1957 return internal_config.legacy_mem ?
1958 eal_legacy_hugepage_attach() :
1959 eal_hugepage_attach();
1963 rte_eal_using_phys_addrs(void)
1965 if (phys_addrs_available == -1) {
1968 if (rte_eal_has_hugepages() != 0 &&
1969 rte_mem_virt2phy(&tmp) != RTE_BAD_PHYS_ADDR)
1970 phys_addrs_available = 1;
1972 phys_addrs_available = 0;
1974 return phys_addrs_available;
1977 static int __rte_unused
1978 memseg_primary_init_32(void)
1980 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
1981 int active_sockets, hpi_idx, msl_idx = 0;
1982 unsigned int socket_id, i;
1983 struct rte_memseg_list *msl;
1984 uint64_t extra_mem_per_socket, total_extra_mem, total_requested_mem;
1987 /* no-huge does not need this at all */
1988 if (internal_config.no_hugetlbfs)
1991 /* this is a giant hack, but desperate times call for desperate
1992 * measures. in legacy 32-bit mode, we cannot preallocate VA space,
1993 * because having upwards of 2 gigabytes of VA space already mapped will
1994 * interfere with our ability to map and sort hugepages.
1996 * therefore, in legacy 32-bit mode, we will be initializing memseg
1997 * lists much later - in eal_memory.c, right after we unmap all the
1998 * unneeded pages. this will not affect secondary processes, as those
1999 * should be able to mmap the space without (too many) problems.
2001 if (internal_config.legacy_mem)
2004 /* 32-bit mode is a very special case. we cannot know in advance where
2005 * the user will want to allocate their memory, so we have to do some
2009 total_requested_mem = 0;
2010 if (internal_config.force_sockets)
2011 for (i = 0; i < rte_socket_count(); i++) {
2014 socket_id = rte_socket_id_by_idx(i);
2015 mem = internal_config.socket_mem[socket_id];
2021 total_requested_mem += mem;
2024 total_requested_mem = internal_config.memory;
2026 max_mem = (uint64_t)RTE_MAX_MEM_MB << 20;
2027 if (total_requested_mem > max_mem) {
2028 RTE_LOG(ERR, EAL, "Invalid parameters: 32-bit process can at most use %uM of memory\n",
2029 (unsigned int)(max_mem >> 20));
2032 total_extra_mem = max_mem - total_requested_mem;
2033 extra_mem_per_socket = active_sockets == 0 ? total_extra_mem :
2034 total_extra_mem / active_sockets;
2036 /* the allocation logic is a little bit convoluted, but here's how it
2037 * works, in a nutshell:
2038 * - if user hasn't specified on which sockets to allocate memory via
2039 * --socket-mem, we allocate all of our memory on master core socket.
2040 * - if user has specified sockets to allocate memory on, there may be
2041 * some "unused" memory left (e.g. if user has specified --socket-mem
2042 * such that not all memory adds up to 2 gigabytes), so add it to all
2043 * sockets that are in use equally.
2045 * page sizes are sorted by size in descending order, so we can safely
2046 * assume that we dispense with bigger page sizes first.
2049 /* create memseg lists */
2050 for (i = 0; i < rte_socket_count(); i++) {
2051 int hp_sizes = (int) internal_config.num_hugepage_sizes;
2052 uint64_t max_socket_mem, cur_socket_mem;
2053 unsigned int master_lcore_socket;
2054 struct rte_config *cfg = rte_eal_get_configuration();
2057 socket_id = rte_socket_id_by_idx(i);
2059 #ifndef RTE_EAL_NUMA_AWARE_HUGEPAGES
2060 /* we can still sort pages by socket in legacy mode */
2061 if (!internal_config.legacy_mem && socket_id > 0)
2065 /* if we didn't specifically request memory on this socket */
2066 skip = active_sockets != 0 &&
2067 internal_config.socket_mem[socket_id] == 0;
2068 /* ...or if we didn't specifically request memory on *any*
2069 * socket, and this is not master lcore
2071 master_lcore_socket = rte_lcore_to_socket_id(cfg->master_lcore);
2072 skip |= active_sockets == 0 && socket_id != master_lcore_socket;
2075 RTE_LOG(DEBUG, EAL, "Will not preallocate memory on socket %u\n",
2080 /* max amount of memory on this socket */
2081 max_socket_mem = (active_sockets != 0 ?
2082 internal_config.socket_mem[socket_id] :
2083 internal_config.memory) +
2084 extra_mem_per_socket;
2087 for (hpi_idx = 0; hpi_idx < hp_sizes; hpi_idx++) {
2088 uint64_t max_pagesz_mem, cur_pagesz_mem = 0;
2089 uint64_t hugepage_sz;
2090 struct hugepage_info *hpi;
2091 int type_msl_idx, max_segs, total_segs = 0;
2093 hpi = &internal_config.hugepage_info[hpi_idx];
2094 hugepage_sz = hpi->hugepage_sz;
2096 /* check if pages are actually available */
2097 if (hpi->num_pages[socket_id] == 0)
2100 max_segs = RTE_MAX_MEMSEG_PER_TYPE;
2101 max_pagesz_mem = max_socket_mem - cur_socket_mem;
2103 /* make it multiple of page size */
2104 max_pagesz_mem = RTE_ALIGN_FLOOR(max_pagesz_mem,
2107 RTE_LOG(DEBUG, EAL, "Attempting to preallocate "
2108 "%" PRIu64 "M on socket %i\n",
2109 max_pagesz_mem >> 20, socket_id);
2112 while (cur_pagesz_mem < max_pagesz_mem &&
2113 total_segs < max_segs) {
2115 unsigned int n_segs;
2117 if (msl_idx >= RTE_MAX_MEMSEG_LISTS) {
2119 "No more space in memseg lists, please increase %s\n",
2120 RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
2124 msl = &mcfg->memsegs[msl_idx];
2126 cur_mem = get_mem_amount(hugepage_sz,
2128 n_segs = cur_mem / hugepage_sz;
2130 if (memseg_list_init(msl, hugepage_sz, n_segs,
2131 socket_id, type_msl_idx)) {
2132 /* failing to allocate a memseg list is
2135 RTE_LOG(ERR, EAL, "Cannot allocate memseg list\n");
2139 if (memseg_list_alloc(msl)) {
2140 /* if we couldn't allocate VA space, we
2141 * can try with smaller page sizes.
2143 RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list, retrying with different page size\n");
2144 /* deallocate memseg list */
2145 if (memseg_list_free(msl))
2150 total_segs += msl->memseg_arr.len;
2151 cur_pagesz_mem = total_segs * hugepage_sz;
2155 cur_socket_mem += cur_pagesz_mem;
2157 if (cur_socket_mem == 0) {
2158 RTE_LOG(ERR, EAL, "Cannot allocate VA space on socket %u\n",
2167 static int __rte_unused
2168 memseg_primary_init(void)
2170 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
2175 int i, hpi_idx, msl_idx, ret = -1; /* fail unless told to succeed */
2176 struct rte_memseg_list *msl;
2177 uint64_t max_mem, max_mem_per_type;
2178 unsigned int max_seglists_per_type;
2179 unsigned int n_memtypes, cur_type;
2181 /* no-huge does not need this at all */
2182 if (internal_config.no_hugetlbfs)
2186 * figuring out amount of memory we're going to have is a long and very
2187 * involved process. the basic element we're operating with is a memory
2188 * type, defined as a combination of NUMA node ID and page size (so that
2189 * e.g. 2 sockets with 2 page sizes yield 4 memory types in total).
2191 * deciding amount of memory going towards each memory type is a
2192 * balancing act between maximum segments per type, maximum memory per
2193 * type, and number of detected NUMA nodes. the goal is to make sure
2194 * each memory type gets at least one memseg list.
2196 * the total amount of memory is limited by RTE_MAX_MEM_MB value.
2198 * the total amount of memory per type is limited by either
2199 * RTE_MAX_MEM_MB_PER_TYPE, or by RTE_MAX_MEM_MB divided by the number
2200 * of detected NUMA nodes. additionally, maximum number of segments per
2201 * type is also limited by RTE_MAX_MEMSEG_PER_TYPE. this is because for
2202 * smaller page sizes, it can take hundreds of thousands of segments to
2203 * reach the above specified per-type memory limits.
2205 * additionally, each type may have multiple memseg lists associated
2206 * with it, each limited by either RTE_MAX_MEM_MB_PER_LIST for bigger
2207 * page sizes, or RTE_MAX_MEMSEG_PER_LIST segments for smaller ones.
2209 * the number of memseg lists per type is decided based on the above
2210 * limits, and also taking number of detected NUMA nodes, to make sure
2211 * that we don't run out of memseg lists before we populate all NUMA
2212 * nodes with memory.
2214 * we do this in three stages. first, we collect the number of types.
2215 * then, we figure out memory constraints and populate the list of
2216 * would-be memseg lists. then, we go ahead and allocate the memseg
2220 /* create space for mem types */
2221 n_memtypes = internal_config.num_hugepage_sizes * rte_socket_count();
2222 memtypes = calloc(n_memtypes, sizeof(*memtypes));
2223 if (memtypes == NULL) {
2224 RTE_LOG(ERR, EAL, "Cannot allocate space for memory types\n");
2228 /* populate mem types */
2230 for (hpi_idx = 0; hpi_idx < (int) internal_config.num_hugepage_sizes;
2232 struct hugepage_info *hpi;
2233 uint64_t hugepage_sz;
2235 hpi = &internal_config.hugepage_info[hpi_idx];
2236 hugepage_sz = hpi->hugepage_sz;
2238 for (i = 0; i < (int) rte_socket_count(); i++, cur_type++) {
2239 int socket_id = rte_socket_id_by_idx(i);
2241 #ifndef RTE_EAL_NUMA_AWARE_HUGEPAGES
2242 /* we can still sort pages by socket in legacy mode */
2243 if (!internal_config.legacy_mem && socket_id > 0)
2246 memtypes[cur_type].page_sz = hugepage_sz;
2247 memtypes[cur_type].socket_id = socket_id;
2249 RTE_LOG(DEBUG, EAL, "Detected memory type: "
2250 "socket_id:%u hugepage_sz:%" PRIu64 "\n",
2251 socket_id, hugepage_sz);
2254 /* number of memtypes could have been lower due to no NUMA support */
2255 n_memtypes = cur_type;
2257 /* set up limits for types */
2258 max_mem = (uint64_t)RTE_MAX_MEM_MB << 20;
2259 max_mem_per_type = RTE_MIN((uint64_t)RTE_MAX_MEM_MB_PER_TYPE << 20,
2260 max_mem / n_memtypes);
2262 * limit maximum number of segment lists per type to ensure there's
2263 * space for memseg lists for all NUMA nodes with all page sizes
2265 max_seglists_per_type = RTE_MAX_MEMSEG_LISTS / n_memtypes;
2267 if (max_seglists_per_type == 0) {
2268 RTE_LOG(ERR, EAL, "Cannot accommodate all memory types, please increase %s\n",
2269 RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
2273 /* go through all mem types and create segment lists */
2275 for (cur_type = 0; cur_type < n_memtypes; cur_type++) {
2276 unsigned int cur_seglist, n_seglists, n_segs;
2277 unsigned int max_segs_per_type, max_segs_per_list;
2278 struct memtype *type = &memtypes[cur_type];
2279 uint64_t max_mem_per_list, pagesz;
2282 pagesz = type->page_sz;
2283 socket_id = type->socket_id;
2286 * we need to create segment lists for this type. we must take
2287 * into account the following things:
2289 * 1. total amount of memory we can use for this memory type
2290 * 2. total amount of memory per memseg list allowed
2291 * 3. number of segments needed to fit the amount of memory
2292 * 4. number of segments allowed per type
2293 * 5. number of segments allowed per memseg list
2294 * 6. number of memseg lists we are allowed to take up
2297 /* calculate how much segments we will need in total */
2298 max_segs_per_type = max_mem_per_type / pagesz;
2299 /* limit number of segments to maximum allowed per type */
2300 max_segs_per_type = RTE_MIN(max_segs_per_type,
2301 (unsigned int)RTE_MAX_MEMSEG_PER_TYPE);
2302 /* limit number of segments to maximum allowed per list */
2303 max_segs_per_list = RTE_MIN(max_segs_per_type,
2304 (unsigned int)RTE_MAX_MEMSEG_PER_LIST);
2306 /* calculate how much memory we can have per segment list */
2307 max_mem_per_list = RTE_MIN(max_segs_per_list * pagesz,
2308 (uint64_t)RTE_MAX_MEM_MB_PER_LIST << 20);
2310 /* calculate how many segments each segment list will have */
2311 n_segs = RTE_MIN(max_segs_per_list, max_mem_per_list / pagesz);
2313 /* calculate how many segment lists we can have */
2314 n_seglists = RTE_MIN(max_segs_per_type / n_segs,
2315 max_mem_per_type / max_mem_per_list);
2317 /* limit number of segment lists according to our maximum */
2318 n_seglists = RTE_MIN(n_seglists, max_seglists_per_type);
2320 RTE_LOG(DEBUG, EAL, "Creating %i segment lists: "
2321 "n_segs:%i socket_id:%i hugepage_sz:%" PRIu64 "\n",
2322 n_seglists, n_segs, socket_id, pagesz);
2324 /* create all segment lists */
2325 for (cur_seglist = 0; cur_seglist < n_seglists; cur_seglist++) {
2326 if (msl_idx >= RTE_MAX_MEMSEG_LISTS) {
2328 "No more space in memseg lists, please increase %s\n",
2329 RTE_STR(CONFIG_RTE_MAX_MEMSEG_LISTS));
2332 msl = &mcfg->memsegs[msl_idx++];
2334 if (memseg_list_init(msl, pagesz, n_segs,
2335 socket_id, cur_seglist))
2338 if (memseg_list_alloc(msl)) {
2339 RTE_LOG(ERR, EAL, "Cannot allocate VA space for memseg list\n");
2344 /* we're successful */
2352 memseg_secondary_init(void)
2354 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
2356 struct rte_memseg_list *msl;
2358 for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) {
2360 msl = &mcfg->memsegs[msl_idx];
2362 /* skip empty memseg lists */
2363 if (msl->memseg_arr.len == 0)
2366 if (rte_fbarray_attach(&msl->memseg_arr)) {
2367 RTE_LOG(ERR, EAL, "Cannot attach to primary process memseg lists\n");
2371 /* preallocate VA space */
2372 if (memseg_list_alloc(msl)) {
2373 RTE_LOG(ERR, EAL, "Cannot preallocate VA space for hugepage memory\n");
2382 rte_eal_memseg_init(void)
2384 /* increase rlimit to maximum */
2387 if (getrlimit(RLIMIT_NOFILE, &lim) == 0) {
2388 /* set limit to maximum */
2389 lim.rlim_cur = lim.rlim_max;
2391 if (setrlimit(RLIMIT_NOFILE, &lim) < 0) {
2392 RTE_LOG(DEBUG, EAL, "Setting maximum number of open files failed: %s\n",
2395 RTE_LOG(DEBUG, EAL, "Setting maximum number of open files to %"
2397 (uint64_t)lim.rlim_cur);
2400 RTE_LOG(ERR, EAL, "Cannot get current resource limits\n");
2402 #ifndef RTE_EAL_NUMA_AWARE_HUGEPAGES
2403 if (!internal_config.legacy_mem && rte_socket_count() > 1) {
2404 RTE_LOG(WARNING, EAL, "DPDK is running on a NUMA system, but is compiled without NUMA support.\n");
2405 RTE_LOG(WARNING, EAL, "This will have adverse consequences for performance and usability.\n");
2406 RTE_LOG(WARNING, EAL, "Please use --"OPT_LEGACY_MEM" option, or recompile with NUMA support.\n");
2410 return rte_eal_process_type() == RTE_PROC_PRIMARY ?
2412 memseg_primary_init_32() :
2414 memseg_primary_init() :
2416 memseg_secondary_init();