4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5 * Copyright(c) 2013 6WIND.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * * Neither the name of Intel Corporation nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #define _FILE_OFFSET_BITS 64
45 #include <sys/types.h>
47 #include <sys/queue.h>
51 #include <sys/ioctl.h>
55 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
61 #include <rte_memory.h>
62 #include <rte_launch.h>
64 #include <rte_eal_memconfig.h>
65 #include <rte_per_lcore.h>
66 #include <rte_lcore.h>
67 #include <rte_common.h>
68 #include <rte_string_fns.h>
70 #include "eal_private.h"
71 #include "eal_internal_cfg.h"
72 #include "eal_filesystem.h"
73 #include "eal_hugepages.h"
75 #define PFN_MASK_SIZE 8
79 * Huge page mapping under linux
81 * To reserve a big contiguous amount of memory, we use the hugepage
82 * feature of linux. For that, we need to have hugetlbfs mounted. This
83 * code will create many files in this directory (one per page) and
84 * map them in virtual memory. For each page, we will retrieve its
85 * physical address and remap it in order to have a virtual contiguous
86 * zone as well as a physical contiguous zone.
89 static uint64_t baseaddr_offset;
91 static bool phys_addrs_available = true;
93 #define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space"
96 test_phys_addrs_available(void)
101 if (!rte_eal_has_hugepages()) {
103 "Started without hugepages support, physical addresses not available\n");
104 phys_addrs_available = false;
108 physaddr = rte_mem_virt2phy(&tmp);
109 if (physaddr == RTE_BAD_PHYS_ADDR) {
110 if (rte_eal_iova_mode() == RTE_IOVA_PA)
112 "Cannot obtain physical addresses: %s. "
113 "Only vfio will function.\n",
115 phys_addrs_available = false;
120 * Get physical address of any mapped virtual address in the current process.
123 rte_mem_virt2phy(const void *virtaddr)
126 uint64_t page, physaddr;
127 unsigned long virt_pfn;
131 /* Cannot parse /proc/self/pagemap, no need to log errors everywhere */
132 if (!phys_addrs_available)
135 /* standard page size */
136 page_size = getpagesize();
138 fd = open("/proc/self/pagemap", O_RDONLY);
140 RTE_LOG(ERR, EAL, "%s(): cannot open /proc/self/pagemap: %s\n",
141 __func__, strerror(errno));
145 virt_pfn = (unsigned long)virtaddr / page_size;
146 offset = sizeof(uint64_t) * virt_pfn;
147 if (lseek(fd, offset, SEEK_SET) == (off_t) -1) {
148 RTE_LOG(ERR, EAL, "%s(): seek error in /proc/self/pagemap: %s\n",
149 __func__, strerror(errno));
154 retval = read(fd, &page, PFN_MASK_SIZE);
157 RTE_LOG(ERR, EAL, "%s(): cannot read /proc/self/pagemap: %s\n",
158 __func__, strerror(errno));
160 } else if (retval != PFN_MASK_SIZE) {
161 RTE_LOG(ERR, EAL, "%s(): read %d bytes from /proc/self/pagemap "
162 "but expected %d:\n",
163 __func__, retval, PFN_MASK_SIZE);
168 * the pfn (page frame number) are bits 0-54 (see
169 * pagemap.txt in linux Documentation)
171 if ((page & 0x7fffffffffffffULL) == 0)
174 physaddr = ((page & 0x7fffffffffffffULL) * page_size)
175 + ((unsigned long)virtaddr % page_size);
181 rte_mem_virt2iova(const void *virtaddr)
183 if (rte_eal_iova_mode() == RTE_IOVA_VA)
184 return (uintptr_t)virtaddr;
185 return rte_mem_virt2phy(virtaddr);
189 * For each hugepage in hugepg_tbl, fill the physaddr value. We find
190 * it by browsing the /proc/self/pagemap special file.
193 find_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
198 for (i = 0; i < hpi->num_pages[0]; i++) {
199 addr = rte_mem_virt2phy(hugepg_tbl[i].orig_va);
200 if (addr == RTE_BAD_PHYS_ADDR)
202 hugepg_tbl[i].physaddr = addr;
208 * For each hugepage in hugepg_tbl, fill the physaddr value sequentially.
211 set_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
214 static phys_addr_t addr;
216 for (i = 0; i < hpi->num_pages[0]; i++) {
217 hugepg_tbl[i].physaddr = addr;
218 addr += hugepg_tbl[i].size;
224 * Check whether address-space layout randomization is enabled in
225 * the kernel. This is important for multi-process as it can prevent
226 * two processes mapping data to the same virtual address
228 * 0 - address space randomization disabled
229 * 1/2 - address space randomization enabled
230 * negative error code on error
236 int retval, fd = open(RANDOMIZE_VA_SPACE_FILE, O_RDONLY);
239 retval = read(fd, &c, 1);
249 default: return -EINVAL;
254 * Try to mmap *size bytes in /dev/zero. If it is successful, return the
255 * pointer to the mmap'd area and keep *size unmodified. Else, retry
256 * with a smaller zone: decrease *size by hugepage_sz until it reaches
257 * 0. In this case, return NULL. Note: this function returns an address
258 * which is a multiple of hugepage size.
261 get_virtual_area(size_t *size, size_t hugepage_sz)
267 if (internal_config.base_virtaddr != 0) {
268 addr = (void*) (uintptr_t) (internal_config.base_virtaddr +
273 RTE_LOG(DEBUG, EAL, "Ask a virtual area of 0x%zx bytes\n", *size);
275 fd = open("/dev/zero", O_RDONLY);
277 RTE_LOG(ERR, EAL, "Cannot open /dev/zero\n");
282 (*size) + hugepage_sz, PROT_READ,
283 #ifdef RTE_ARCH_PPC_64
284 MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB,
289 if (addr == MAP_FAILED)
290 *size -= hugepage_sz;
291 } while (addr == MAP_FAILED && *size > 0);
293 if (addr == MAP_FAILED) {
295 RTE_LOG(ERR, EAL, "Cannot get a virtual area: %s\n",
300 munmap(addr, (*size) + hugepage_sz);
303 /* align addr to a huge page size boundary */
304 aligned_addr = (long)addr;
305 aligned_addr += (hugepage_sz - 1);
306 aligned_addr &= (~(hugepage_sz - 1));
307 addr = (void *)(aligned_addr);
309 RTE_LOG(DEBUG, EAL, "Virtual area found at %p (size = 0x%zx)\n",
312 /* increment offset */
313 baseaddr_offset += *size;
318 static sigjmp_buf huge_jmpenv;
320 static void huge_sigbus_handler(int signo __rte_unused)
322 siglongjmp(huge_jmpenv, 1);
325 /* Put setjmp into a wrap method to avoid compiling error. Any non-volatile,
326 * non-static local variable in the stack frame calling sigsetjmp might be
327 * clobbered by a call to longjmp.
329 static int huge_wrap_sigsetjmp(void)
331 return sigsetjmp(huge_jmpenv, 1);
334 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
335 /* Callback for numa library. */
336 void numa_error(char *where)
338 RTE_LOG(ERR, EAL, "%s failed: %s\n", where, strerror(errno));
343 * Mmap all hugepages of hugepage table: it first open a file in
344 * hugetlbfs, then mmap() hugepage_sz data in it. If orig is set, the
345 * virtual address is stored in hugepg_tbl[i].orig_va, else it is stored
346 * in hugepg_tbl[i].final_va. The second mapping (when orig is 0) tries to
347 * map continguous physical blocks in contiguous virtual blocks.
350 map_all_hugepages(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi,
351 uint64_t *essential_memory __rte_unused, int orig)
356 void *vma_addr = NULL;
358 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
360 int essential_prev = 0;
362 struct bitmask *oldmask = numa_allocate_nodemask();
363 bool have_numa = true;
364 unsigned long maxnode = 0;
366 /* Check if kernel supports NUMA. */
367 if (numa_available() != 0) {
368 RTE_LOG(DEBUG, EAL, "NUMA is not supported.\n");
372 if (orig && have_numa) {
373 RTE_LOG(DEBUG, EAL, "Trying to obtain current memory policy.\n");
374 if (get_mempolicy(&oldpolicy, oldmask->maskp,
375 oldmask->size + 1, 0, 0) < 0) {
377 "Failed to get current mempolicy: %s. "
378 "Assuming MPOL_DEFAULT.\n", strerror(errno));
379 oldpolicy = MPOL_DEFAULT;
381 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
382 if (internal_config.socket_mem[i])
387 for (i = 0; i < hpi->num_pages[0]; i++) {
388 uint64_t hugepage_sz = hpi->hugepage_sz;
390 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
394 for (j = 0; j < maxnode; j++)
395 if (essential_memory[j])
399 node_id = (node_id + 1) % maxnode;
400 while (!internal_config.socket_mem[node_id]) {
407 essential_prev = essential_memory[j];
409 if (essential_memory[j] < hugepage_sz)
410 essential_memory[j] = 0;
412 essential_memory[j] -= hugepage_sz;
416 "Setting policy MPOL_PREFERRED for socket %d\n",
418 numa_set_preferred(node_id);
423 hugepg_tbl[i].file_id = i;
424 hugepg_tbl[i].size = hugepage_sz;
425 eal_get_hugefile_path(hugepg_tbl[i].filepath,
426 sizeof(hugepg_tbl[i].filepath), hpi->hugedir,
427 hugepg_tbl[i].file_id);
428 hugepg_tbl[i].filepath[sizeof(hugepg_tbl[i].filepath) - 1] = '\0';
431 /* for 32-bit systems, don't remap 1G and 16G pages, just reuse
432 * original map address as final map address.
434 else if ((hugepage_sz == RTE_PGSIZE_1G)
435 || (hugepage_sz == RTE_PGSIZE_16G)) {
436 hugepg_tbl[i].final_va = hugepg_tbl[i].orig_va;
437 hugepg_tbl[i].orig_va = NULL;
441 else if (vma_len == 0) {
442 unsigned j, num_pages;
444 /* reserve a virtual area for next contiguous
445 * physical block: count the number of
446 * contiguous physical pages. */
447 for (j = i+1; j < hpi->num_pages[0] ; j++) {
448 #ifdef RTE_ARCH_PPC_64
449 /* The physical addresses are sorted in
450 * descending order on PPC64 */
451 if (hugepg_tbl[j].physaddr !=
452 hugepg_tbl[j-1].physaddr - hugepage_sz)
455 if (hugepg_tbl[j].physaddr !=
456 hugepg_tbl[j-1].physaddr + hugepage_sz)
461 vma_len = num_pages * hugepage_sz;
463 /* get the biggest virtual memory area up to
464 * vma_len. If it fails, vma_addr is NULL, so
465 * let the kernel provide the address. */
466 vma_addr = get_virtual_area(&vma_len, hpi->hugepage_sz);
467 if (vma_addr == NULL)
468 vma_len = hugepage_sz;
471 /* try to create hugepage file */
472 fd = open(hugepg_tbl[i].filepath, O_CREAT | O_RDWR, 0600);
474 RTE_LOG(DEBUG, EAL, "%s(): open failed: %s\n", __func__,
479 /* map the segment, and populate page tables,
480 * the kernel fills this segment with zeros */
481 virtaddr = mmap(vma_addr, hugepage_sz, PROT_READ | PROT_WRITE,
482 MAP_SHARED | MAP_POPULATE, fd, 0);
483 if (virtaddr == MAP_FAILED) {
484 RTE_LOG(DEBUG, EAL, "%s(): mmap failed: %s\n", __func__,
491 hugepg_tbl[i].orig_va = virtaddr;
494 hugepg_tbl[i].final_va = virtaddr;
498 /* In linux, hugetlb limitations, like cgroup, are
499 * enforced at fault time instead of mmap(), even
500 * with the option of MAP_POPULATE. Kernel will send
501 * a SIGBUS signal. To avoid to be killed, save stack
502 * environment here, if SIGBUS happens, we can jump
505 if (huge_wrap_sigsetjmp()) {
506 RTE_LOG(DEBUG, EAL, "SIGBUS: Cannot mmap more "
507 "hugepages of size %u MB\n",
508 (unsigned)(hugepage_sz / 0x100000));
509 munmap(virtaddr, hugepage_sz);
511 unlink(hugepg_tbl[i].filepath);
512 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
514 essential_memory[node_id] =
519 *(int *)virtaddr = 0;
523 /* set shared flock on the file. */
524 if (flock(fd, LOCK_SH | LOCK_NB) == -1) {
525 RTE_LOG(DEBUG, EAL, "%s(): Locking file failed:%s \n",
526 __func__, strerror(errno));
533 vma_addr = (char *)vma_addr + hugepage_sz;
534 vma_len -= hugepage_sz;
538 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
541 "Restoring previous memory policy: %d\n", oldpolicy);
542 if (oldpolicy == MPOL_DEFAULT) {
543 numa_set_localalloc();
544 } else if (set_mempolicy(oldpolicy, oldmask->maskp,
545 oldmask->size + 1) < 0) {
546 RTE_LOG(ERR, EAL, "Failed to restore mempolicy: %s\n",
548 numa_set_localalloc();
551 numa_free_cpumask(oldmask);
556 /* Unmap all hugepages from original mapping */
558 unmap_all_hugepages_orig(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
561 for (i = 0; i < hpi->num_pages[0]; i++) {
562 if (hugepg_tbl[i].orig_va) {
563 munmap(hugepg_tbl[i].orig_va, hpi->hugepage_sz);
564 hugepg_tbl[i].orig_va = NULL;
571 * Parse /proc/self/numa_maps to get the NUMA socket ID for each huge
575 find_numasocket(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
579 unsigned i, hp_count = 0;
582 char hugedir_str[PATH_MAX];
585 f = fopen("/proc/self/numa_maps", "r");
587 RTE_LOG(NOTICE, EAL, "NUMA support not available"
588 " consider that all memory is in socket_id 0\n");
592 snprintf(hugedir_str, sizeof(hugedir_str),
593 "%s/%s", hpi->hugedir, internal_config.hugefile_prefix);
596 while (fgets(buf, sizeof(buf), f) != NULL) {
598 /* ignore non huge page */
599 if (strstr(buf, " huge ") == NULL &&
600 strstr(buf, hugedir_str) == NULL)
604 virt_addr = strtoull(buf, &end, 16);
605 if (virt_addr == 0 || end == buf) {
606 RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__);
610 /* get node id (socket id) */
611 nodestr = strstr(buf, " N");
612 if (nodestr == NULL) {
613 RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__);
617 end = strstr(nodestr, "=");
619 RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__);
625 socket_id = strtoul(nodestr, &end, 0);
626 if ((nodestr[0] == '\0') || (end == NULL) || (*end != '\0')) {
627 RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__);
631 /* if we find this page in our mappings, set socket_id */
632 for (i = 0; i < hpi->num_pages[0]; i++) {
633 void *va = (void *)(unsigned long)virt_addr;
634 if (hugepg_tbl[i].orig_va == va) {
635 hugepg_tbl[i].socket_id = socket_id;
637 #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES
639 "Hugepage %s is on socket %d\n",
640 hugepg_tbl[i].filepath, socket_id);
646 if (hp_count < hpi->num_pages[0])
658 cmp_physaddr(const void *a, const void *b)
660 #ifndef RTE_ARCH_PPC_64
661 const struct hugepage_file *p1 = a;
662 const struct hugepage_file *p2 = b;
664 /* PowerPC needs memory sorted in reverse order from x86 */
665 const struct hugepage_file *p1 = b;
666 const struct hugepage_file *p2 = a;
668 if (p1->physaddr < p2->physaddr)
670 else if (p1->physaddr > p2->physaddr)
677 * Uses mmap to create a shared memory area for storage of data
678 * Used in this file to store the hugepage file map on disk
681 create_shared_memory(const char *filename, const size_t mem_size)
684 int fd = open(filename, O_CREAT | O_RDWR, 0666);
687 if (ftruncate(fd, mem_size) < 0) {
691 retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
693 if (retval == MAP_FAILED)
699 * this copies *active* hugepages from one hugepage table to another.
700 * destination is typically the shared memory.
703 copy_hugepages_to_shared_mem(struct hugepage_file * dst, int dest_size,
704 const struct hugepage_file * src, int src_size)
706 int src_pos, dst_pos = 0;
708 for (src_pos = 0; src_pos < src_size; src_pos++) {
709 if (src[src_pos].final_va != NULL) {
710 /* error on overflow attempt */
711 if (dst_pos == dest_size)
713 memcpy(&dst[dst_pos], &src[src_pos], sizeof(struct hugepage_file));
721 unlink_hugepage_files(struct hugepage_file *hugepg_tbl,
722 unsigned num_hp_info)
724 unsigned socket, size;
725 int page, nrpages = 0;
727 /* get total number of hugepages */
728 for (size = 0; size < num_hp_info; size++)
729 for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++)
731 internal_config.hugepage_info[size].num_pages[socket];
733 for (page = 0; page < nrpages; page++) {
734 struct hugepage_file *hp = &hugepg_tbl[page];
736 if (hp->final_va != NULL && unlink(hp->filepath)) {
737 RTE_LOG(WARNING, EAL, "%s(): Removing %s failed: %s\n",
738 __func__, hp->filepath, strerror(errno));
745 * unmaps hugepages that are not going to be used. since we originally allocate
746 * ALL hugepages (not just those we need), additional unmapping needs to be done.
749 unmap_unneeded_hugepages(struct hugepage_file *hugepg_tbl,
750 struct hugepage_info *hpi,
751 unsigned num_hp_info)
753 unsigned socket, size;
754 int page, nrpages = 0;
756 /* get total number of hugepages */
757 for (size = 0; size < num_hp_info; size++)
758 for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++)
759 nrpages += internal_config.hugepage_info[size].num_pages[socket];
761 for (size = 0; size < num_hp_info; size++) {
762 for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) {
763 unsigned pages_found = 0;
765 /* traverse until we have unmapped all the unused pages */
766 for (page = 0; page < nrpages; page++) {
767 struct hugepage_file *hp = &hugepg_tbl[page];
769 /* find a page that matches the criteria */
770 if ((hp->size == hpi[size].hugepage_sz) &&
771 (hp->socket_id == (int) socket)) {
773 /* if we skipped enough pages, unmap the rest */
774 if (pages_found == hpi[size].num_pages[socket]) {
777 unmap_len = hp->size;
779 /* get start addr and len of the remaining segment */
780 munmap(hp->final_va, (size_t) unmap_len);
783 if (unlink(hp->filepath) == -1) {
784 RTE_LOG(ERR, EAL, "%s(): Removing %s failed: %s\n",
785 __func__, hp->filepath, strerror(errno));
789 /* lock the page and skip */
795 } /* foreach socket */
796 } /* foreach pagesize */
801 static inline uint64_t
802 get_socket_mem_size(int socket)
807 for (i = 0; i < internal_config.num_hugepage_sizes; i++){
808 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
809 if (hpi->hugedir != NULL)
810 size += hpi->hugepage_sz * hpi->num_pages[socket];
817 * This function is a NUMA-aware equivalent of calc_num_pages.
818 * It takes in the list of hugepage sizes and the
819 * number of pages thereof, and calculates the best number of
820 * pages of each size to fulfill the request for <memory> ram
823 calc_num_pages_per_socket(uint64_t * memory,
824 struct hugepage_info *hp_info,
825 struct hugepage_info *hp_used,
826 unsigned num_hp_info)
828 unsigned socket, j, i = 0;
829 unsigned requested, available;
830 int total_num_pages = 0;
831 uint64_t remaining_mem, cur_mem;
832 uint64_t total_mem = internal_config.memory;
834 if (num_hp_info == 0)
837 /* if specific memory amounts per socket weren't requested */
838 if (internal_config.force_sockets == 0) {
839 int cpu_per_socket[RTE_MAX_NUMA_NODES];
840 size_t default_size, total_size;
843 /* Compute number of cores per socket */
844 memset(cpu_per_socket, 0, sizeof(cpu_per_socket));
845 RTE_LCORE_FOREACH(lcore_id) {
846 cpu_per_socket[rte_lcore_to_socket_id(lcore_id)]++;
850 * Automatically spread requested memory amongst detected sockets according
851 * to number of cores from cpu mask present on each socket
853 total_size = internal_config.memory;
854 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0; socket++) {
856 /* Set memory amount per socket */
857 default_size = (internal_config.memory * cpu_per_socket[socket])
860 /* Limit to maximum available memory on socket */
861 default_size = RTE_MIN(default_size, get_socket_mem_size(socket));
864 memory[socket] = default_size;
865 total_size -= default_size;
869 * If some memory is remaining, try to allocate it by getting all
870 * available memory from sockets, one after the other
872 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0; socket++) {
873 /* take whatever is available */
874 default_size = RTE_MIN(get_socket_mem_size(socket) - memory[socket],
878 memory[socket] += default_size;
879 total_size -= default_size;
883 for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_mem != 0; socket++) {
884 /* skips if the memory on specific socket wasn't requested */
885 for (i = 0; i < num_hp_info && memory[socket] != 0; i++){
886 hp_used[i].hugedir = hp_info[i].hugedir;
887 hp_used[i].num_pages[socket] = RTE_MIN(
888 memory[socket] / hp_info[i].hugepage_sz,
889 hp_info[i].num_pages[socket]);
891 cur_mem = hp_used[i].num_pages[socket] *
892 hp_used[i].hugepage_sz;
894 memory[socket] -= cur_mem;
895 total_mem -= cur_mem;
897 total_num_pages += hp_used[i].num_pages[socket];
899 /* check if we have met all memory requests */
900 if (memory[socket] == 0)
903 /* check if we have any more pages left at this size, if so
904 * move on to next size */
905 if (hp_used[i].num_pages[socket] == hp_info[i].num_pages[socket])
907 /* At this point we know that there are more pages available that are
908 * bigger than the memory we want, so lets see if we can get enough
909 * from other page sizes.
912 for (j = i+1; j < num_hp_info; j++)
913 remaining_mem += hp_info[j].hugepage_sz *
914 hp_info[j].num_pages[socket];
916 /* is there enough other memory, if not allocate another page and quit */
917 if (remaining_mem < memory[socket]){
918 cur_mem = RTE_MIN(memory[socket],
919 hp_info[i].hugepage_sz);
920 memory[socket] -= cur_mem;
921 total_mem -= cur_mem;
922 hp_used[i].num_pages[socket]++;
924 break; /* we are done with this socket*/
927 /* if we didn't satisfy all memory requirements per socket */
928 if (memory[socket] > 0) {
929 /* to prevent icc errors */
930 requested = (unsigned) (internal_config.socket_mem[socket] /
932 available = requested -
933 ((unsigned) (memory[socket] / 0x100000));
934 RTE_LOG(ERR, EAL, "Not enough memory available on socket %u! "
935 "Requested: %uMB, available: %uMB\n", socket,
936 requested, available);
941 /* if we didn't satisfy total memory requirements */
943 requested = (unsigned) (internal_config.memory / 0x100000);
944 available = requested - (unsigned) (total_mem / 0x100000);
945 RTE_LOG(ERR, EAL, "Not enough memory available! Requested: %uMB,"
946 " available: %uMB\n", requested, available);
949 return total_num_pages;
953 eal_get_hugepage_mem_size(void)
958 for (i = 0; i < internal_config.num_hugepage_sizes; i++) {
959 struct hugepage_info *hpi = &internal_config.hugepage_info[i];
960 if (hpi->hugedir != NULL) {
961 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
962 size += hpi->hugepage_sz * hpi->num_pages[j];
967 return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX;
970 static struct sigaction huge_action_old;
971 static int huge_need_recover;
974 huge_register_sigbus(void)
977 struct sigaction action;
980 sigaddset(&mask, SIGBUS);
982 action.sa_mask = mask;
983 action.sa_handler = huge_sigbus_handler;
985 huge_need_recover = !sigaction(SIGBUS, &action, &huge_action_old);
989 huge_recover_sigbus(void)
991 if (huge_need_recover) {
992 sigaction(SIGBUS, &huge_action_old, NULL);
993 huge_need_recover = 0;
998 * Prepare physical memory mapping: fill configuration structure with
999 * these infos, return 0 on success.
1000 * 1. map N huge pages in separate files in hugetlbfs
1001 * 2. find associated physical addr
1002 * 3. find associated NUMA socket ID
1003 * 4. sort all huge pages by physical address
1004 * 5. remap these N huge pages in the correct order
1005 * 6. unmap the first mapping
1006 * 7. fill memsegs in configuration with contiguous zones
1009 rte_eal_hugepage_init(void)
1011 struct rte_mem_config *mcfg;
1012 struct hugepage_file *hugepage = NULL, *tmp_hp = NULL;
1013 struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES];
1015 uint64_t memory[RTE_MAX_NUMA_NODES];
1018 int i, j, new_memseg;
1019 int nr_hugefiles, nr_hugepages = 0;
1022 test_phys_addrs_available();
1024 memset(used_hp, 0, sizeof(used_hp));
1026 /* get pointer to global configuration */
1027 mcfg = rte_eal_get_configuration()->mem_config;
1029 /* hugetlbfs can be disabled */
1030 if (internal_config.no_hugetlbfs) {
1031 addr = mmap(NULL, internal_config.memory, PROT_READ | PROT_WRITE,
1032 MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
1033 if (addr == MAP_FAILED) {
1034 RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__,
1038 if (rte_eal_iova_mode() == RTE_IOVA_VA)
1039 mcfg->memseg[0].iova = (uintptr_t)addr;
1041 mcfg->memseg[0].iova = RTE_BAD_IOVA;
1042 mcfg->memseg[0].addr = addr;
1043 mcfg->memseg[0].hugepage_sz = RTE_PGSIZE_4K;
1044 mcfg->memseg[0].len = internal_config.memory;
1045 mcfg->memseg[0].socket_id = 0;
1049 /* calculate total number of hugepages available. at this point we haven't
1050 * yet started sorting them so they all are on socket 0 */
1051 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) {
1052 /* meanwhile, also initialize used_hp hugepage sizes in used_hp */
1053 used_hp[i].hugepage_sz = internal_config.hugepage_info[i].hugepage_sz;
1055 nr_hugepages += internal_config.hugepage_info[i].num_pages[0];
1059 * allocate a memory area for hugepage table.
1060 * this isn't shared memory yet. due to the fact that we need some
1061 * processing done on these pages, shared memory will be created
1064 tmp_hp = malloc(nr_hugepages * sizeof(struct hugepage_file));
1068 memset(tmp_hp, 0, nr_hugepages * sizeof(struct hugepage_file));
1070 hp_offset = 0; /* where we start the current page size entries */
1072 huge_register_sigbus();
1074 /* make a copy of socket_mem, needed for balanced allocation. */
1075 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
1076 memory[i] = internal_config.socket_mem[i];
1079 /* map all hugepages and sort them */
1080 for (i = 0; i < (int)internal_config.num_hugepage_sizes; i ++){
1081 unsigned pages_old, pages_new;
1082 struct hugepage_info *hpi;
1085 * we don't yet mark hugepages as used at this stage, so
1086 * we just map all hugepages available to the system
1087 * all hugepages are still located on socket 0
1089 hpi = &internal_config.hugepage_info[i];
1091 if (hpi->num_pages[0] == 0)
1094 /* map all hugepages available */
1095 pages_old = hpi->num_pages[0];
1096 pages_new = map_all_hugepages(&tmp_hp[hp_offset], hpi,
1098 if (pages_new < pages_old) {
1100 "%d not %d hugepages of size %u MB allocated\n",
1101 pages_new, pages_old,
1102 (unsigned)(hpi->hugepage_sz / 0x100000));
1104 int pages = pages_old - pages_new;
1106 nr_hugepages -= pages;
1107 hpi->num_pages[0] = pages_new;
1112 if (phys_addrs_available) {
1113 /* find physical addresses for each hugepage */
1114 if (find_physaddrs(&tmp_hp[hp_offset], hpi) < 0) {
1115 RTE_LOG(DEBUG, EAL, "Failed to find phys addr "
1116 "for %u MB pages\n",
1117 (unsigned int)(hpi->hugepage_sz / 0x100000));
1121 /* set physical addresses for each hugepage */
1122 if (set_physaddrs(&tmp_hp[hp_offset], hpi) < 0) {
1123 RTE_LOG(DEBUG, EAL, "Failed to set phys addr "
1124 "for %u MB pages\n",
1125 (unsigned int)(hpi->hugepage_sz / 0x100000));
1130 if (find_numasocket(&tmp_hp[hp_offset], hpi) < 0){
1131 RTE_LOG(DEBUG, EAL, "Failed to find NUMA socket for %u MB pages\n",
1132 (unsigned)(hpi->hugepage_sz / 0x100000));
1136 qsort(&tmp_hp[hp_offset], hpi->num_pages[0],
1137 sizeof(struct hugepage_file), cmp_physaddr);
1139 /* remap all hugepages */
1140 if (map_all_hugepages(&tmp_hp[hp_offset], hpi, NULL, 0) !=
1141 hpi->num_pages[0]) {
1142 RTE_LOG(ERR, EAL, "Failed to remap %u MB pages\n",
1143 (unsigned)(hpi->hugepage_sz / 0x100000));
1147 /* unmap original mappings */
1148 if (unmap_all_hugepages_orig(&tmp_hp[hp_offset], hpi) < 0)
1151 /* we have processed a num of hugepages of this size, so inc offset */
1152 hp_offset += hpi->num_pages[0];
1155 huge_recover_sigbus();
1157 if (internal_config.memory == 0 && internal_config.force_sockets == 0)
1158 internal_config.memory = eal_get_hugepage_mem_size();
1160 nr_hugefiles = nr_hugepages;
1163 /* clean out the numbers of pages */
1164 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++)
1165 for (j = 0; j < RTE_MAX_NUMA_NODES; j++)
1166 internal_config.hugepage_info[i].num_pages[j] = 0;
1168 /* get hugepages for each socket */
1169 for (i = 0; i < nr_hugefiles; i++) {
1170 int socket = tmp_hp[i].socket_id;
1172 /* find a hugepage info with right size and increment num_pages */
1173 const int nb_hpsizes = RTE_MIN(MAX_HUGEPAGE_SIZES,
1174 (int)internal_config.num_hugepage_sizes);
1175 for (j = 0; j < nb_hpsizes; j++) {
1176 if (tmp_hp[i].size ==
1177 internal_config.hugepage_info[j].hugepage_sz) {
1178 internal_config.hugepage_info[j].num_pages[socket]++;
1183 /* make a copy of socket_mem, needed for number of pages calculation */
1184 for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
1185 memory[i] = internal_config.socket_mem[i];
1187 /* calculate final number of pages */
1188 nr_hugepages = calc_num_pages_per_socket(memory,
1189 internal_config.hugepage_info, used_hp,
1190 internal_config.num_hugepage_sizes);
1192 /* error if not enough memory available */
1193 if (nr_hugepages < 0)
1197 for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) {
1198 for (j = 0; j < RTE_MAX_NUMA_NODES; j++) {
1199 if (used_hp[i].num_pages[j] > 0) {
1201 "Requesting %u pages of size %uMB"
1202 " from socket %i\n",
1203 used_hp[i].num_pages[j],
1205 (used_hp[i].hugepage_sz / 0x100000),
1211 /* create shared memory */
1212 hugepage = create_shared_memory(eal_hugepage_info_path(),
1213 nr_hugefiles * sizeof(struct hugepage_file));
1215 if (hugepage == NULL) {
1216 RTE_LOG(ERR, EAL, "Failed to create shared memory!\n");
1219 memset(hugepage, 0, nr_hugefiles * sizeof(struct hugepage_file));
1222 * unmap pages that we won't need (looks at used_hp).
1223 * also, sets final_va to NULL on pages that were unmapped.
1225 if (unmap_unneeded_hugepages(tmp_hp, used_hp,
1226 internal_config.num_hugepage_sizes) < 0) {
1227 RTE_LOG(ERR, EAL, "Unmapping and locking hugepages failed!\n");
1232 * copy stuff from malloc'd hugepage* to the actual shared memory.
1233 * this procedure only copies those hugepages that have final_va
1234 * not NULL. has overflow protection.
1236 if (copy_hugepages_to_shared_mem(hugepage, nr_hugefiles,
1237 tmp_hp, nr_hugefiles) < 0) {
1238 RTE_LOG(ERR, EAL, "Copying tables to shared memory failed!\n");
1242 /* free the hugepage backing files */
1243 if (internal_config.hugepage_unlink &&
1244 unlink_hugepage_files(tmp_hp, internal_config.num_hugepage_sizes) < 0) {
1245 RTE_LOG(ERR, EAL, "Unlinking hugepage files failed!\n");
1249 /* free the temporary hugepage table */
1253 /* first memseg index shall be 0 after incrementing it below */
1255 for (i = 0; i < nr_hugefiles; i++) {
1258 /* if this is a new section, create a new memseg */
1261 else if (hugepage[i].socket_id != hugepage[i-1].socket_id)
1263 else if (hugepage[i].size != hugepage[i-1].size)
1266 #ifdef RTE_ARCH_PPC_64
1267 /* On PPC64 architecture, the mmap always start from higher
1268 * virtual address to lower address. Here, both the physical
1269 * address and virtual address are in descending order */
1270 else if ((hugepage[i-1].physaddr - hugepage[i].physaddr) !=
1273 else if (((unsigned long)hugepage[i-1].final_va -
1274 (unsigned long)hugepage[i].final_va) != hugepage[i].size)
1277 else if ((hugepage[i].physaddr - hugepage[i-1].physaddr) !=
1280 else if (((unsigned long)hugepage[i].final_va -
1281 (unsigned long)hugepage[i-1].final_va) != hugepage[i].size)
1287 if (j == RTE_MAX_MEMSEG)
1290 mcfg->memseg[j].iova = hugepage[i].physaddr;
1291 mcfg->memseg[j].addr = hugepage[i].final_va;
1292 mcfg->memseg[j].len = hugepage[i].size;
1293 mcfg->memseg[j].socket_id = hugepage[i].socket_id;
1294 mcfg->memseg[j].hugepage_sz = hugepage[i].size;
1296 /* continuation of previous memseg */
1298 #ifdef RTE_ARCH_PPC_64
1299 /* Use the phy and virt address of the last page as segment
1300 * address for IBM Power architecture */
1301 mcfg->memseg[j].iova = hugepage[i].physaddr;
1302 mcfg->memseg[j].addr = hugepage[i].final_va;
1304 mcfg->memseg[j].len += mcfg->memseg[j].hugepage_sz;
1306 hugepage[i].memseg_id = j;
1309 if (i < nr_hugefiles) {
1310 RTE_LOG(ERR, EAL, "Can only reserve %d pages "
1311 "from %d requested\n"
1312 "Current %s=%d is not enough\n"
1313 "Please either increase it or request less amount "
1315 i, nr_hugefiles, RTE_STR(CONFIG_RTE_MAX_MEMSEG),
1320 munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file));
1325 huge_recover_sigbus();
1327 if (hugepage != NULL)
1328 munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file));
1334 * uses fstat to report the size of a file on disk
1340 if (fstat(fd, &st) < 0)
1346 * This creates the memory mappings in the secondary process to match that of
1347 * the server process. It goes through each memory segment in the DPDK runtime
1348 * configuration and finds the hugepages which form that segment, mapping them
1349 * in order to form a contiguous block in the virtual memory space
1352 rte_eal_hugepage_attach(void)
1354 const struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
1355 struct hugepage_file *hp = NULL;
1356 unsigned num_hp = 0;
1357 unsigned i, s = 0; /* s used to track the segment number */
1358 unsigned max_seg = RTE_MAX_MEMSEG;
1360 int fd, fd_zero = -1, fd_hugepage = -1;
1362 if (aslr_enabled() > 0) {
1363 RTE_LOG(WARNING, EAL, "WARNING: Address Space Layout Randomization "
1364 "(ASLR) is enabled in the kernel.\n");
1365 RTE_LOG(WARNING, EAL, " This may cause issues with mapping memory "
1366 "into secondary processes\n");
1369 test_phys_addrs_available();
1371 fd_zero = open("/dev/zero", O_RDONLY);
1373 RTE_LOG(ERR, EAL, "Could not open /dev/zero\n");
1376 fd_hugepage = open(eal_hugepage_info_path(), O_RDONLY);
1377 if (fd_hugepage < 0) {
1378 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
1382 /* map all segments into memory to make sure we get the addrs */
1383 for (s = 0; s < RTE_MAX_MEMSEG; ++s) {
1387 * the first memory segment with len==0 is the one that
1388 * follows the last valid segment.
1390 if (mcfg->memseg[s].len == 0)
1394 * fdzero is mmapped to get a contiguous block of virtual
1395 * addresses of the appropriate memseg size.
1396 * use mmap to get identical addresses as the primary process.
1398 base_addr = mmap(mcfg->memseg[s].addr, mcfg->memseg[s].len,
1400 #ifdef RTE_ARCH_PPC_64
1401 MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB,
1406 if (base_addr == MAP_FAILED ||
1407 base_addr != mcfg->memseg[s].addr) {
1409 if (base_addr != MAP_FAILED) {
1410 /* errno is stale, don't use */
1411 RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
1412 "in /dev/zero at [%p], got [%p] - "
1413 "please use '--base-virtaddr' option\n",
1414 (unsigned long long)mcfg->memseg[s].len,
1415 mcfg->memseg[s].addr, base_addr);
1416 munmap(base_addr, mcfg->memseg[s].len);
1418 RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
1419 "in /dev/zero at [%p]: '%s'\n",
1420 (unsigned long long)mcfg->memseg[s].len,
1421 mcfg->memseg[s].addr, strerror(errno));
1423 if (aslr_enabled() > 0) {
1424 RTE_LOG(ERR, EAL, "It is recommended to "
1425 "disable ASLR in the kernel "
1426 "and retry running both primary "
1427 "and secondary processes\n");
1433 size = getFileSize(fd_hugepage);
1434 hp = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd_hugepage, 0);
1435 if (hp == MAP_FAILED) {
1436 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
1440 num_hp = size / sizeof(struct hugepage_file);
1441 RTE_LOG(DEBUG, EAL, "Analysing %u files\n", num_hp);
1444 while (s < RTE_MAX_MEMSEG && mcfg->memseg[s].len > 0){
1445 void *addr, *base_addr;
1446 uintptr_t offset = 0;
1447 size_t mapping_size;
1449 * free previously mapped memory so we can map the
1450 * hugepages into the space
1452 base_addr = mcfg->memseg[s].addr;
1453 munmap(base_addr, mcfg->memseg[s].len);
1455 /* find the hugepages for this segment and map them
1456 * we don't need to worry about order, as the server sorted the
1457 * entries before it did the second mmap of them */
1458 for (i = 0; i < num_hp && offset < mcfg->memseg[s].len; i++){
1459 if (hp[i].memseg_id == (int)s){
1460 fd = open(hp[i].filepath, O_RDWR);
1462 RTE_LOG(ERR, EAL, "Could not open %s\n",
1466 mapping_size = hp[i].size;
1467 addr = mmap(RTE_PTR_ADD(base_addr, offset),
1468 mapping_size, PROT_READ | PROT_WRITE,
1470 close(fd); /* close file both on success and on failure */
1471 if (addr == MAP_FAILED ||
1472 addr != RTE_PTR_ADD(base_addr, offset)) {
1473 RTE_LOG(ERR, EAL, "Could not mmap %s\n",
1477 offset+=mapping_size;
1480 RTE_LOG(DEBUG, EAL, "Mapped segment %u of size 0x%llx\n", s,
1481 (unsigned long long)mcfg->memseg[s].len);
1484 /* unmap the hugepage config file, since we are done using it */
1491 for (i = 0; i < max_seg && mcfg->memseg[i].len > 0; i++)
1492 munmap(mcfg->memseg[i].addr, mcfg->memseg[i].len);
1493 if (hp != NULL && hp != MAP_FAILED)
1497 if (fd_hugepage >= 0)
1503 rte_eal_using_phys_addrs(void)
1505 return phys_addrs_available;