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lib/eal/linux/eal_memory.c
2 035 строк
53 KB
Anatoly Burakov
mem: store default segment limits in config
04 июн 2026, 11:16
04 июн 2026, 11:16
51c066f
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/* SPDX-License-Identifier: BSD-3-Clause * Copyright(c) 2010-2014 Intel Corporation. * Copyright(c) 2013 6WIND S.A. */ #include <errno.h> #include <fcntl.h> #include <stdbool.h> #include <stdlib.h> #include <stdio.h> #include <stdint.h> #include <inttypes.h> #include <string.h> #include <sys/mman.h> #include <sys/stat.h> #include <sys/file.h> #include <sys/resource.h> #include <sys/personality.h> #include <unistd.h> #include <limits.h> #include <signal.h> #include <setjmp.h> #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES #include <numa.h> #include <numaif.h> #endif #include <rte_errno.h> #include <rte_log.h> #include <rte_memory.h> #include <rte_eal.h> #include <rte_lcore.h> #include <rte_common.h> #include <eal_export.h> #include "eal_private.h" #include "eal_memalloc.h" #include "eal_memcfg.h" #include "eal_internal_cfg.h" #include "eal_filesystem.h" #include "eal_hugepages.h" #include "eal_options.h" #define PFN_MASK_SIZE 8 /** * @file * Huge page mapping under linux * * To reserve a big contiguous amount of memory, we use the hugepage * feature of linux. For that, we need to have hugetlbfs mounted. This * code will create many files in this directory (one per page) and * map them in virtual memory. For each page, we will retrieve its * physical address and remap it in order to have a virtual contiguous * zone as well as a physical contiguous zone. */ static int phys_addrs_available = -1; #define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space" uint64_t eal_get_baseaddr(void) { /* * Linux kernel uses a really high address as starting address for * serving mmaps calls. If there exists addressing limitations and IOVA * mode is VA, this starting address is likely too high for those * devices. However, it is possible to use a lower address in the * process virtual address space as with 64 bits there is a lot of * available space. * * Current known limitations are 39 or 40 bits. Setting the starting * address at 4GB implies there are 508GB or 1020GB for mapping the * available hugepages. This is likely enough for most systems, although * a device with addressing limitations should call * rte_mem_check_dma_mask for ensuring all memory is within supported * range. */ #if defined(RTE_ARCH_LOONGARCH) return 0x7000000000ULL; #else return 0x100000000ULL; #endif } /* * Get physical address of any mapped virtual address in the current process. */ RTE_EXPORT_SYMBOL(rte_mem_virt2phy) phys_addr_t rte_mem_virt2phy(const void *virtaddr) { int fd, retval; uint64_t page, physaddr; unsigned long virt_pfn; int page_size; off_t offset; if (phys_addrs_available == 0) return RTE_BAD_IOVA; /* standard page size */ page_size = getpagesize(); fd = open("/proc/self/pagemap", O_RDONLY); if (fd < 0) { EAL_LOG(INFO, "%s(): cannot open /proc/self/pagemap: %s", __func__, strerror(errno)); return RTE_BAD_IOVA; } virt_pfn = (unsigned long)virtaddr / page_size; offset = sizeof(uint64_t) * virt_pfn; if (lseek(fd, offset, SEEK_SET) == (off_t) -1) { EAL_LOG(INFO, "%s(): seek error in /proc/self/pagemap: %s", __func__, strerror(errno)); close(fd); return RTE_BAD_IOVA; } retval = read(fd, &page, PFN_MASK_SIZE); close(fd); if (retval < 0) { EAL_LOG(INFO, "%s(): cannot read /proc/self/pagemap: %s", __func__, strerror(errno)); return RTE_BAD_IOVA; } else if (retval != PFN_MASK_SIZE) { EAL_LOG(INFO, "%s(): read %d bytes from /proc/self/pagemap " "but expected %d:", __func__, retval, PFN_MASK_SIZE); return RTE_BAD_IOVA; } /* * the pfn (page frame number) are bits 0-54 (see * pagemap.txt in linux Documentation) */ if ((page & 0x7fffffffffffffULL) == 0) return RTE_BAD_IOVA; physaddr = ((page & 0x7fffffffffffffULL) * page_size) + ((unsigned long)virtaddr % page_size); return physaddr; } RTE_EXPORT_SYMBOL(rte_mem_virt2iova) rte_iova_t rte_mem_virt2iova(const void *virtaddr) { if (rte_eal_iova_mode() == RTE_IOVA_VA) return (uintptr_t)virtaddr; return rte_mem_virt2phy(virtaddr); } /* * For each hugepage in hugepg_tbl, fill the physaddr value. We find * it by browsing the /proc/self/pagemap special file. */ static int find_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) { unsigned int i; phys_addr_t addr; for (i = 0; i < hpi->num_pages[0]; i++) { addr = rte_mem_virt2phy(hugepg_tbl[i].orig_va); if (addr == RTE_BAD_PHYS_ADDR) return -1; hugepg_tbl[i].physaddr = addr; } return 0; } /* * For each hugepage in hugepg_tbl, fill the physaddr value sequentially. */ static int set_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) { unsigned int i; static phys_addr_t addr; for (i = 0; i < hpi->num_pages[0]; i++) { hugepg_tbl[i].physaddr = addr; addr += hugepg_tbl[i].size; } return 0; } /* * Check whether address-space layout randomization is enabled in * the kernel. This is important for multi-process as it can prevent * two processes mapping data to the same virtual address * Returns: * 0 - address space randomization disabled * 1/2 - address space randomization enabled * negative error code on error */ static int aslr_enabled(void) { char c; /* * Check whether the current process is executed with the command line * "setarch ... --addr-no-randomize ..." or "setarch ... -R ..." * This complements the sysfs check to ensure comprehensive ASLR status detection. * This check is necessary to support the functionality of the "setarch" command, * which can disable ASLR by setting the ADDR_NO_RANDOMIZE personality flag. */ if ((personality(0xffffffff) & ADDR_NO_RANDOMIZE) == ADDR_NO_RANDOMIZE) return 0; int retval, fd = open(RANDOMIZE_VA_SPACE_FILE, O_RDONLY); if (fd < 0) return -errno; retval = read(fd, &c, 1); close(fd); if (retval < 0) return -errno; if (retval == 0) return -EIO; switch (c) { case '0' : return 0; case '1' : return 1; case '2' : return 2; default: return -EINVAL; } } static sigjmp_buf huge_jmpenv; static void huge_sigbus_handler(int signo __rte_unused) { siglongjmp(huge_jmpenv, 1); } /* Put setjmp into a wrap method to avoid compiling error. Any non-volatile, * non-static local variable in the stack frame calling sigsetjmp might be * clobbered by a call to longjmp. */ static int huge_wrap_sigsetjmp(void) { return sigsetjmp(huge_jmpenv, 1); } #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES /* Callback for numa library. */ void numa_error(char *where) { EAL_LOG(ERR, "%s failed: %s", where, strerror(errno)); } #endif /* * Mmap all hugepages of hugepage table: it first open a file in * hugetlbfs, then mmap() hugepage_sz data in it. If orig is set, the * virtual address is stored in hugepg_tbl[i].orig_va, else it is stored * in hugepg_tbl[i].final_va. The second mapping (when orig is 0) tries to * map contiguous physical blocks in contiguous virtual blocks. */ static unsigned map_all_hugepages(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi, uint64_t *essential_memory __rte_unused) { int fd; unsigned i; void *virtaddr; #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES int node_id = -1; int essential_prev = 0; int oldpolicy; struct bitmask *oldmask = NULL; bool have_numa = true; unsigned long maxnode = 0; const struct internal_config *internal_conf = eal_get_internal_configuration(); /* Check if kernel supports NUMA. */ if (numa_available() != 0) { EAL_LOG(DEBUG, "NUMA is not supported."); have_numa = false; } if (have_numa) { EAL_LOG(DEBUG, "Trying to obtain current memory policy."); oldmask = numa_allocate_nodemask(); if (get_mempolicy(&oldpolicy, oldmask->maskp, oldmask->size + 1, 0, 0) < 0) { EAL_LOG(ERR, "Failed to get current mempolicy: %s. " "Assuming MPOL_DEFAULT.", strerror(errno)); oldpolicy = MPOL_DEFAULT; } for (i = 0; i < RTE_MAX_NUMA_NODES; i++) if (internal_conf->numa_mem[i]) maxnode = i + 1; } #endif for (i = 0; i < hpi->num_pages[0]; i++) { struct hugepage_file *hf = &hugepg_tbl[i]; uint64_t hugepage_sz = hpi->hugepage_sz; #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES if (maxnode) { unsigned int j; for (j = 0; j < maxnode; j++) if (essential_memory[j]) break; if (j == maxnode) { node_id = (node_id + 1) % maxnode; while (!internal_conf->numa_mem[node_id]) { node_id++; node_id %= maxnode; } essential_prev = 0; } else { node_id = j; essential_prev = essential_memory[j]; if (essential_memory[j] < hugepage_sz) essential_memory[j] = 0; else essential_memory[j] -= hugepage_sz; } EAL_LOG(DEBUG, "Setting policy MPOL_PREFERRED for socket %d", node_id); numa_set_preferred(node_id); } #endif hf->file_id = i; hf->size = hugepage_sz; if (eal_get_hugefile_path(hf->filepath, sizeof(hf->filepath), hpi->hugedir, hf->file_id) == NULL) { EAL_LOG(DEBUG, "%s(): huge file path '%s' truncated", __func__, hf->filepath); goto out; } hf->filepath[sizeof(hf->filepath) - 1] = '\0'; /* try to create hugepage file */ fd = open(hf->filepath, O_CREAT | O_RDWR, 0600); if (fd < 0) { EAL_LOG(DEBUG, "%s(): open failed: %s", __func__, strerror(errno)); goto out; } /* map the segment, and populate page tables, * the kernel fills this segment with zeros. we don't care where * this gets mapped - we already have contiguous memory areas * ready for us to map into. */ virtaddr = mmap(NULL, hugepage_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd, 0); if (virtaddr == MAP_FAILED) { EAL_LOG(DEBUG, "%s(): mmap failed: %s", __func__, strerror(errno)); close(fd); goto out; } hf->orig_va = virtaddr; /* In linux, hugetlb limitations, like cgroup, are * enforced at fault time instead of mmap(), even * with the option of MAP_POPULATE. Kernel will send * a SIGBUS signal. To avoid to be killed, save stack * environment here, if SIGBUS happens, we can jump * back here. */ if (huge_wrap_sigsetjmp()) { EAL_LOG(DEBUG, "SIGBUS: Cannot mmap more " "hugepages of size %u MB", (unsigned int)(hugepage_sz / 0x100000)); munmap(virtaddr, hugepage_sz); close(fd); unlink(hugepg_tbl[i].filepath); #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES if (maxnode) essential_memory[node_id] = essential_prev; #endif goto out; } *(int *)virtaddr = 0; /* set shared lock on the file. */ if (flock(fd, LOCK_SH) < 0) { EAL_LOG(DEBUG, "%s(): Locking file failed:%s ", __func__, strerror(errno)); close(fd); goto out; } close(fd); } out: #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES if (maxnode) { EAL_LOG(DEBUG, "Restoring previous memory policy: %d", oldpolicy); if (oldpolicy == MPOL_DEFAULT) { numa_set_localalloc(); } else if (set_mempolicy(oldpolicy, oldmask->maskp, oldmask->size + 1) < 0) { EAL_LOG(ERR, "Failed to restore mempolicy: %s", strerror(errno)); numa_set_localalloc(); } } if (oldmask != NULL) numa_free_cpumask(oldmask); #endif return i; } /* * Parse /proc/self/numa_maps to get the NUMA socket ID for each huge * page. */ static int find_numasocket(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) { int socket_id; char *end, *nodestr; unsigned i, hp_count = 0; uint64_t virt_addr; char buf[BUFSIZ]; char *hugedir_str; FILE *f; int ret; f = fopen("/proc/self/numa_maps", "r"); if (f == NULL) { EAL_LOG(NOTICE, "NUMA support not available" " consider that all memory is in socket_id 0"); return 0; } ret = asprintf(&hugedir_str, "%s/%s", hpi->hugedir, eal_get_hugefile_prefix()); if (ret < 0) { EAL_LOG(ERR, "%s(): failed to store hugepage path", __func__); hugedir_str = NULL; goto error; } ret = -1; /* parse numa map */ while (fgets(buf, sizeof(buf), f) != NULL) { /* ignore non huge page */ if (strstr(buf, " huge ") == NULL && strstr(buf, hugedir_str) == NULL) continue; /* get zone addr */ virt_addr = strtoull(buf, &end, 16); if (virt_addr == 0 || end == buf) { EAL_LOG(ERR, "%s(): error in numa_maps parsing", __func__); goto error; } /* get node id (socket id) */ nodestr = strstr(buf, " N"); if (nodestr == NULL) { EAL_LOG(ERR, "%s(): error in numa_maps parsing", __func__); goto error; } nodestr += 2; end = strstr(nodestr, "="); if (end == NULL) { EAL_LOG(ERR, "%s(): error in numa_maps parsing", __func__); goto error; } end[0] = '\0'; end = NULL; socket_id = strtoul(nodestr, &end, 0); if ((nodestr[0] == '\0') || (end == NULL) || (*end != '\0')) { EAL_LOG(ERR, "%s(): error in numa_maps parsing", __func__); goto error; } /* if we find this page in our mappings, set socket_id */ for (i = 0; i < hpi->num_pages[0]; i++) { void *va = (void *)(unsigned long)virt_addr; if (hugepg_tbl[i].orig_va == va) { hugepg_tbl[i].socket_id = socket_id; hp_count++; #ifdef RTE_EAL_NUMA_AWARE_HUGEPAGES EAL_LOG(DEBUG, "Hugepage %s is on socket %d", hugepg_tbl[i].filepath, socket_id); #endif } } } if (hp_count < hpi->num_pages[0]) goto error; ret = 0; error: free(hugedir_str); fclose(f); return ret; } static int cmp_physaddr(const void *a, const void *b) { #ifndef RTE_ARCH_PPC_64 const struct hugepage_file *p1 = a; const struct hugepage_file *p2 = b; #else /* PowerPC needs memory sorted in reverse order from x86 */ const struct hugepage_file *p1 = b; const struct hugepage_file *p2 = a; #endif if (p1->physaddr < p2->physaddr) return -1; else if (p1->physaddr > p2->physaddr) return 1; else return 0; } /* * Uses mmap to create a shared memory area for storage of data * Used in this file to store the hugepage file map on disk */ static void * create_shared_memory(const char *filename, const size_t mem_size) { void *retval; int fd; const struct internal_config *internal_conf = eal_get_internal_configuration(); /* if no shared files mode is used, create anonymous memory instead */ if (internal_conf->no_shconf) { retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (retval == MAP_FAILED) return NULL; return retval; } fd = open(filename, O_CREAT | O_RDWR, 0600); if (fd < 0) return NULL; if (ftruncate(fd, mem_size) < 0) { close(fd); return NULL; } retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); close(fd); if (retval == MAP_FAILED) return NULL; return retval; } /* * this copies *active* hugepages from one hugepage table to another. * destination is typically the shared memory. */ static int copy_hugepages_to_shared_mem(struct hugepage_file * dst, int dest_size, const struct hugepage_file * src, int src_size) { int src_pos, dst_pos = 0; for (src_pos = 0; src_pos < src_size; src_pos++) { if (src[src_pos].orig_va != NULL) { /* error on overflow attempt */ if (dst_pos == dest_size) return -1; memcpy(&dst[dst_pos], &src[src_pos], sizeof(struct hugepage_file)); dst_pos++; } } return 0; } static int unlink_hugepage_files(struct hugepage_file *hugepg_tbl, unsigned num_hp_info) { unsigned socket, size; int page, nrpages = 0; const struct internal_config *internal_conf = eal_get_internal_configuration(); /* get total number of hugepages */ for (size = 0; size < num_hp_info; size++) for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) nrpages += internal_conf->hugepage_info[size].num_pages[socket]; for (page = 0; page < nrpages; page++) { struct hugepage_file *hp = &hugepg_tbl[page]; if (hp->orig_va != NULL && unlink(hp->filepath)) { EAL_LOG(WARNING, "%s(): Removing %s failed: %s", __func__, hp->filepath, strerror(errno)); } } return 0; } /* * unmaps hugepages that are not going to be used. since we originally allocate * ALL hugepages (not just those we need), additional unmapping needs to be done. */ static int unmap_unneeded_hugepages(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi, unsigned num_hp_info) { unsigned socket, size; int page, nrpages = 0; const struct internal_config *internal_conf = eal_get_internal_configuration(); /* get total number of hugepages */ for (size = 0; size < num_hp_info; size++) for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) nrpages += internal_conf->hugepage_info[size].num_pages[socket]; for (size = 0; size < num_hp_info; size++) { for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) { unsigned pages_found = 0; /* traverse until we have unmapped all the unused pages */ for (page = 0; page < nrpages; page++) { struct hugepage_file *hp = &hugepg_tbl[page]; /* find a page that matches the criteria */ if ((hp->size == hpi[size].hugepage_sz) && (hp->socket_id == (int) socket)) { /* if we skipped enough pages, unmap the rest */ if (pages_found == hpi[size].num_pages[socket]) { uint64_t unmap_len; unmap_len = hp->size; /* get start addr and len of the remaining segment */ munmap(hp->orig_va, (size_t)unmap_len); hp->orig_va = NULL; if (unlink(hp->filepath) == -1) { EAL_LOG(ERR, "%s(): Removing %s failed: %s", __func__, hp->filepath, strerror(errno)); return -1; } } else { /* lock the page and skip */ pages_found++; } } /* match page */ } /* foreach page */ } /* foreach socket */ } /* foreach pagesize */ return 0; } static int remap_segment(struct hugepage_file *hugepages, int seg_start, int seg_end) { struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; struct rte_memseg_list *msl; struct rte_fbarray *arr; int cur_page, seg_len; unsigned int msl_idx; int ms_idx; uint64_t page_sz; size_t memseg_len; int socket_id; #ifndef RTE_ARCH_64 const struct internal_config *internal_conf = eal_get_internal_configuration(); #endif page_sz = hugepages[seg_start].size; socket_id = hugepages[seg_start].socket_id; seg_len = seg_end - seg_start; EAL_LOG(DEBUG, "Attempting to map %" PRIu64 "M on socket %i", (seg_len * page_sz) >> 20ULL, socket_id); /* find free space in memseg lists */ for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) { int free_len; bool empty; msl = &mcfg->memsegs[msl_idx]; arr = &msl->memseg_arr; if (msl->page_sz != page_sz) continue; if (msl->socket_id != socket_id) continue; /* leave space for a hole if array is not empty */ empty = arr->count == 0; /* find start of the biggest contiguous block and its size */ ms_idx = rte_fbarray_find_biggest_free(arr, 0); if (ms_idx < 0) continue; /* hole is 1 segment long, so at least two segments long. */ free_len = rte_fbarray_find_contig_free(arr, ms_idx); if (free_len < 2) continue; /* leave some space between memsegs, they are not IOVA * contiguous, so they shouldn't be VA contiguous either. */ if (!empty) { ms_idx++; free_len--; } /* we might not get all of the space we wanted */ free_len = RTE_MIN(seg_len, free_len); seg_end = seg_start + free_len; seg_len = seg_end - seg_start; break; } if (msl_idx == RTE_MAX_MEMSEG_LISTS) { EAL_LOG(ERR, "Could not find suitable space for memseg in existing memseg lists"); return -1; } #ifdef RTE_ARCH_PPC_64 /* for PPC64 we go through the list backwards */ for (cur_page = seg_end - 1; cur_page >= seg_start; cur_page--, ms_idx++) { #else for (cur_page = seg_start; cur_page < seg_end; cur_page++, ms_idx++) { #endif struct hugepage_file *hfile = &hugepages[cur_page]; struct rte_memseg *ms = rte_fbarray_get(arr, ms_idx); void *addr; int fd; fd = open(hfile->filepath, O_RDWR); if (fd < 0) { EAL_LOG(ERR, "Could not open '%s': %s", hfile->filepath, strerror(errno)); return -1; } /* set shared lock on the file. */ if (flock(fd, LOCK_SH) < 0) { EAL_LOG(DEBUG, "Could not lock '%s': %s", hfile->filepath, strerror(errno)); close(fd); return -1; } memseg_len = (size_t)page_sz; addr = RTE_PTR_ADD(msl->base_va, ms_idx * memseg_len); /* we know this address is already mmapped by memseg list, so * using MAP_FIXED here is safe */ addr = mmap(addr, page_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd, 0); if (addr == MAP_FAILED) { EAL_LOG(ERR, "Couldn't remap '%s': %s", hfile->filepath, strerror(errno)); close(fd); return -1; } /* we have a new address, so unmap previous one */ #ifndef RTE_ARCH_64 /* in 32-bit legacy mode, we have already unmapped the page */ if (!internal_conf->legacy_mem) munmap(hfile->orig_va, page_sz); #else munmap(hfile->orig_va, page_sz); #endif hfile->orig_va = NULL; hfile->final_va = addr; /* rewrite physical addresses in IOVA as VA mode */ if (rte_eal_iova_mode() == RTE_IOVA_VA) hfile->physaddr = (uintptr_t)addr; /* set up memseg data */ ms->addr = addr; ms->hugepage_sz = page_sz; ms->len = memseg_len; ms->iova = hfile->physaddr; ms->socket_id = hfile->socket_id; ms->nchannel = rte_memory_get_nchannel(); ms->nrank = rte_memory_get_nrank(); rte_fbarray_set_used(arr, ms_idx); /* store segment fd internally */ if (eal_memalloc_set_seg_fd(msl_idx, ms_idx, fd) < 0) EAL_LOG(ERR, "Could not store segment fd: %s", rte_strerror(rte_errno)); } EAL_LOG(DEBUG, "Allocated %" PRIu64 "M on socket %i", (seg_len * page_sz) >> 20, socket_id); return seg_len; } static int memseg_list_free(struct rte_memseg_list *msl) { if (rte_fbarray_destroy(&msl->memseg_arr)) { EAL_LOG(ERR, "Cannot destroy memseg list"); return -1; } memset(msl, 0, sizeof(*msl)); return 0; } /* * Our VA space is not preallocated yet, so preallocate it here. We need to know * how many segments there are in order to map all pages into one address space, * and leave appropriate holes between segments so that rte_malloc does not * concatenate them into one big segment. * * we also need to unmap original pages to free up address space. */ static int __rte_unused prealloc_segments(struct hugepage_file *hugepages, int n_pages) { struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; int cur_page, seg_start_page, end_seg, new_memseg; unsigned int hpi_idx, socket, i; int n_contig_segs, n_segs; int msl_idx; const struct internal_config *internal_conf = eal_get_internal_configuration(); /* before we preallocate segments, we need to free up our VA space. * we're not removing files, and we already have information about * PA-contiguousness, so it is safe to unmap everything. */ for (cur_page = 0; cur_page < n_pages; cur_page++) { struct hugepage_file *hpi = &hugepages[cur_page]; munmap(hpi->orig_va, hpi->size); hpi->orig_va = NULL; } /* we cannot know how many page sizes and sockets we have discovered, so * loop over all of them */ for (hpi_idx = 0; hpi_idx < internal_conf->num_hugepage_sizes; hpi_idx++) { uint64_t page_sz = internal_conf->hugepage_info[hpi_idx].hugepage_sz; for (i = 0; i < rte_socket_count(); i++) { struct rte_memseg_list *msl; socket = rte_socket_id_by_idx(i); n_contig_segs = 0; n_segs = 0; seg_start_page = -1; for (cur_page = 0; cur_page < n_pages; cur_page++) { struct hugepage_file *prev, *cur; int prev_seg_start_page = -1; cur = &hugepages[cur_page]; prev = cur_page == 0 ? NULL : &hugepages[cur_page - 1]; new_memseg = 0; end_seg = 0; if (cur->size == 0) end_seg = 1; else if (cur->socket_id != (int) socket) end_seg = 1; else if (cur->size != page_sz) end_seg = 1; else if (cur_page == 0) new_memseg = 1; #ifdef RTE_ARCH_PPC_64 /* On PPC64 architecture, the mmap always start * from higher address to lower address. Here, * physical addresses are in descending order. */ else if ((prev->physaddr - cur->physaddr) != cur->size) new_memseg = 1; #else else if ((cur->physaddr - prev->physaddr) != cur->size) new_memseg = 1; #endif if (new_memseg) { /* if we're already inside a segment, * new segment means end of current one */ if (seg_start_page != -1) { end_seg = 1; prev_seg_start_page = seg_start_page; } seg_start_page = cur_page; } if (end_seg) { if (prev_seg_start_page != -1) { /* we've found a new segment */ n_contig_segs++; n_segs += cur_page - prev_seg_start_page; } else if (seg_start_page != -1) { /* we didn't find new segment, * but did end current one */ n_contig_segs++; n_segs += cur_page - seg_start_page; seg_start_page = -1; continue; } else { /* we're skipping this page */ continue; } } /* segment continues */ } /* check if we missed last segment */ if (seg_start_page != -1) { n_contig_segs++; n_segs += cur_page - seg_start_page; } /* if no segments were found, do not preallocate */ if (n_segs == 0) continue; /* we now have total number of pages that we will * allocate for this segment list. add separator pages * to the total count, and preallocate VA space. */ n_segs += n_contig_segs - 1; /* now, preallocate VA space for these segments */ /* first, find suitable memseg list for this */ for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) { msl = &mcfg->memsegs[msl_idx]; if (msl->base_va != NULL) continue; break; } if (msl_idx == RTE_MAX_MEMSEG_LISTS) { EAL_LOG(ERR, "Not enough space in memseg lists, please increase RTE_MAX_MEMSEG_LISTS"); return -1; } /* now, allocate fbarray itself */ if (eal_memseg_list_init(msl, page_sz, n_segs, socket, msl_idx, true) < 0) return -1; /* finally, allocate VA space */ if (eal_memseg_list_alloc(msl, 0) < 0) { EAL_LOG(ERR, "Cannot preallocate 0x%"PRIx64"kB hugepages", page_sz >> 10); return -1; } } } return 0; } /* * We cannot reallocate memseg lists on the fly because PPC64 stores pages * backwards, therefore we have to process the entire memseg first before * remapping it into memseg list VA space. */ static int remap_needed_hugepages(struct hugepage_file *hugepages, int n_pages) { int cur_page, seg_start_page, new_memseg, ret; seg_start_page = 0; for (cur_page = 0; cur_page < n_pages; cur_page++) { struct hugepage_file *prev, *cur; new_memseg = 0; cur = &hugepages[cur_page]; prev = cur_page == 0 ? NULL : &hugepages[cur_page - 1]; /* if size is zero, no more pages left */ if (cur->size == 0) break; if (cur_page == 0) new_memseg = 1; else if (cur->socket_id != prev->socket_id) new_memseg = 1; else if (cur->size != prev->size) new_memseg = 1; #ifdef RTE_ARCH_PPC_64 /* On PPC64 architecture, the mmap always start from higher * address to lower address. Here, physical addresses are in * descending order. */ else if ((prev->physaddr - cur->physaddr) != cur->size) new_memseg = 1; #else else if ((cur->physaddr - prev->physaddr) != cur->size) new_memseg = 1; #endif if (new_memseg) { /* if this isn't the first time, remap segment */ if (cur_page != 0) { int n_remapped = 0; int n_needed = cur_page - seg_start_page; while (n_remapped < n_needed) { ret = remap_segment(hugepages, seg_start_page, cur_page); if (ret < 0) return -1; n_remapped += ret; seg_start_page += ret; } } /* remember where we started */ seg_start_page = cur_page; } /* continuation of previous memseg */ } /* we were stopped, but we didn't remap the last segment, do it now */ if (cur_page != 0) { int n_remapped = 0; int n_needed = cur_page - seg_start_page; while (n_remapped < n_needed) { ret = remap_segment(hugepages, seg_start_page, cur_page); if (ret < 0) return -1; n_remapped += ret; seg_start_page += ret; } } return 0; } static inline size_t eal_get_hugepage_mem_size(void) { uint64_t size = 0; unsigned i, j; struct internal_config *internal_conf = eal_get_internal_configuration(); for (i = 0; i < internal_conf->num_hugepage_sizes; i++) { struct hugepage_info *hpi = &internal_conf->hugepage_info[i]; if (strnlen(hpi->hugedir, sizeof(hpi->hugedir)) != 0) { for (j = 0; j < RTE_MAX_NUMA_NODES; j++) { size += hpi->hugepage_sz * hpi->num_pages[j]; } } } return (size < SIZE_MAX) ? (size_t)(size) : SIZE_MAX; } static struct sigaction huge_action_old; static int huge_need_recover; static void huge_register_sigbus(void) { sigset_t mask; struct sigaction action; sigemptyset(&mask); sigaddset(&mask, SIGBUS); action.sa_flags = 0; action.sa_mask = mask; action.sa_handler = huge_sigbus_handler; huge_need_recover = !sigaction(SIGBUS, &action, &huge_action_old); } static void huge_recover_sigbus(void) { if (huge_need_recover) { sigaction(SIGBUS, &huge_action_old, NULL); huge_need_recover = 0; } } /* * Prepare physical memory mapping: fill configuration structure with * these infos, return 0 on success. * 1. map N huge pages in separate files in hugetlbfs * 2. find associated physical addr * 3. find associated NUMA socket ID * 4. sort all huge pages by physical address * 5. remap these N huge pages in the correct order * 6. unmap the first mapping * 7. fill memsegs in configuration with contiguous zones */ static int eal_legacy_hugepage_init(void) { struct rte_mem_config *mcfg; struct hugepage_file *hugepage = NULL, *tmp_hp = NULL; struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES]; struct internal_config *internal_conf = eal_get_internal_configuration(); uint64_t memory[RTE_MAX_NUMA_NODES]; unsigned hp_offset; int i, j; int nr_hugefiles, nr_hugepages = 0; void *addr; memset(used_hp, 0, sizeof(used_hp)); /* get pointer to global configuration */ mcfg = rte_eal_get_configuration()->mem_config; /* hugetlbfs can be disabled */ if (internal_conf->no_hugetlbfs) { void *prealloc_addr; size_t mem_sz; struct rte_memseg_list *msl; int n_segs, fd, flags; int memfd; uint64_t page_sz; /* nohuge mode is legacy mode */ internal_conf->legacy_mem = 1; /* nohuge mode is single-file segments mode */ internal_conf->single_file_segments = 1; /* create a memseg list */ msl = &mcfg->memsegs[0]; mem_sz = internal_conf->memory; page_sz = RTE_PGSIZE_4K; n_segs = mem_sz / page_sz; if (eal_memseg_list_init_named( msl, "nohugemem", page_sz, n_segs, 0, true)) { return -1; } /* set up parameters for anonymous mmap */ fd = -1; flags = MAP_PRIVATE | MAP_ANONYMOUS; /* create a memfd and store it in the segment fd table */ memfd = memfd_create("nohuge", 0); if (memfd < 0) { EAL_LOG(DEBUG, "Cannot create memfd: %s", strerror(errno)); EAL_LOG(DEBUG, "Falling back to anonymous map"); } else { /* we got an fd - now resize it */ if (ftruncate(memfd, internal_conf->memory) < 0) { EAL_LOG(ERR, "Cannot resize memfd: %s", strerror(errno)); EAL_LOG(ERR, "Falling back to anonymous map"); close(memfd); } else { /* creating memfd-backed file was successful. * we want changes to memfd to be visible to * other processes (such as vhost backend), so * map it as shared memory. */ EAL_LOG(DEBUG, "Using memfd for anonymous memory"); fd = memfd; flags = MAP_SHARED; } } /* preallocate address space for the memory, so that it can be * fit into the DMA mask. */ if (eal_memseg_list_alloc(msl, 0)) { EAL_LOG(ERR, "Cannot preallocate VA space for hugepage memory"); return -1; } prealloc_addr = msl->base_va; addr = mmap(prealloc_addr, mem_sz, PROT_READ | PROT_WRITE, flags | MAP_FIXED, fd, 0); if (addr == MAP_FAILED || addr != prealloc_addr) { EAL_LOG(ERR, "%s: mmap() failed: %s", __func__, strerror(errno)); munmap(prealloc_addr, mem_sz); return -1; } /* we're in single-file segments mode, so only the segment list * fd needs to be set up. */ if (fd != -1) { if (eal_memalloc_set_seg_list_fd(0, fd) < 0) { EAL_LOG(ERR, "Cannot set up segment list fd"); /* not a serious error, proceed */ } } eal_memseg_list_populate(msl, addr, n_segs); if (mcfg->dma_maskbits && rte_mem_check_dma_mask_thread_unsafe(mcfg->dma_maskbits)) { EAL_LOG(ERR, "%s(): couldn't allocate memory due to IOVA exceeding limits of current DMA mask.", __func__); if (rte_eal_iova_mode() == RTE_IOVA_VA && rte_eal_using_phys_addrs()) EAL_LOG(ERR, "%s(): Please try initializing EAL with --iova-mode=pa parameter.", __func__); goto fail; } return 0; } /* calculate total number of hugepages available. at this point we haven't * yet started sorting them so they all are on socket 0 */ for (i = 0; i < (int) internal_conf->num_hugepage_sizes; i++) { /* meanwhile, also initialize used_hp hugepage sizes in used_hp */ used_hp[i].hugepage_sz = internal_conf->hugepage_info[i].hugepage_sz; nr_hugepages += internal_conf->hugepage_info[i].num_pages[0]; } /* * allocate a memory area for hugepage table. * this isn't shared memory yet. due to the fact that we need some * processing done on these pages, shared memory will be created * at a later stage. */ tmp_hp = malloc(nr_hugepages * sizeof(struct hugepage_file)); if (tmp_hp == NULL) goto fail; memset(tmp_hp, 0, nr_hugepages * sizeof(struct hugepage_file)); hp_offset = 0; /* where we start the current page size entries */ huge_register_sigbus(); /* make a copy of numa_mem, needed for balanced allocation. */ for (i = 0; i < RTE_MAX_NUMA_NODES; i++) memory[i] = internal_conf->numa_mem[i]; /* map all hugepages and sort them */ for (i = 0; i < (int)internal_conf->num_hugepage_sizes; i++) { unsigned pages_old, pages_new; struct hugepage_info *hpi; /* * we don't yet mark hugepages as used at this stage, so * we just map all hugepages available to the system * all hugepages are still located on socket 0 */ hpi = &internal_conf->hugepage_info[i]; if (hpi->num_pages[0] == 0) continue; /* map all hugepages available */ pages_old = hpi->num_pages[0]; pages_new = map_all_hugepages(&tmp_hp[hp_offset], hpi, memory); if (pages_new < pages_old) { EAL_LOG(DEBUG, "%d not %d hugepages of size %u MB allocated", pages_new, pages_old, (unsigned)(hpi->hugepage_sz / 0x100000)); int pages = pages_old - pages_new; nr_hugepages -= pages; hpi->num_pages[0] = pages_new; if (pages_new == 0) continue; } if (rte_eal_using_phys_addrs() && rte_eal_iova_mode() != RTE_IOVA_VA) { /* find physical addresses for each hugepage */ if (find_physaddrs(&tmp_hp[hp_offset], hpi) < 0) { EAL_LOG(DEBUG, "Failed to find phys addr " "for %u MB pages", (unsigned int)(hpi->hugepage_sz / 0x100000)); goto fail; } } else { /* set physical addresses for each hugepage */ if (set_physaddrs(&tmp_hp[hp_offset], hpi) < 0) { EAL_LOG(DEBUG, "Failed to set phys addr " "for %u MB pages", (unsigned int)(hpi->hugepage_sz / 0x100000)); goto fail; } } if (find_numasocket(&tmp_hp[hp_offset], hpi) < 0){ EAL_LOG(DEBUG, "Failed to find NUMA socket for %u MB pages", (unsigned)(hpi->hugepage_sz / 0x100000)); goto fail; } qsort(&tmp_hp[hp_offset], hpi->num_pages[0], sizeof(struct hugepage_file), cmp_physaddr); /* we have processed a num of hugepages of this size, so inc offset */ hp_offset += hpi->num_pages[0]; } huge_recover_sigbus(); if (internal_conf->memory == 0 && internal_conf->force_numa == 0) internal_conf->memory = eal_get_hugepage_mem_size(); nr_hugefiles = nr_hugepages; /* clean out the numbers of pages */ for (i = 0; i < (int) internal_conf->num_hugepage_sizes; i++) for (j = 0; j < RTE_MAX_NUMA_NODES; j++) internal_conf->hugepage_info[i].num_pages[j] = 0; /* get hugepages for each socket */ for (i = 0; i < nr_hugefiles; i++) { int socket = tmp_hp[i].socket_id; /* find a hugepage info with right size and increment num_pages */ const int nb_hpsizes = RTE_MIN(MAX_HUGEPAGE_SIZES, (int)internal_conf->num_hugepage_sizes); for (j = 0; j < nb_hpsizes; j++) { if (tmp_hp[i].size == internal_conf->hugepage_info[j].hugepage_sz) { internal_conf->hugepage_info[j].num_pages[socket]++; } } } /* make a copy of numa_mem, needed for number of pages calculation */ for (i = 0; i < RTE_MAX_NUMA_NODES; i++) memory[i] = internal_conf->numa_mem[i]; /* calculate final number of pages */ nr_hugepages = eal_dynmem_calc_num_pages_per_socket(memory, internal_conf->hugepage_info, used_hp, internal_conf->num_hugepage_sizes); /* error if not enough memory available */ if (nr_hugepages < 0) goto fail; /* reporting in! */ for (i = 0; i < (int) internal_conf->num_hugepage_sizes; i++) { for (j = 0; j < RTE_MAX_NUMA_NODES; j++) { if (used_hp[i].num_pages[j] > 0) { EAL_LOG(DEBUG, "Requesting %u pages of size %uMB" " from socket %i", used_hp[i].num_pages[j], (unsigned) (used_hp[i].hugepage_sz / 0x100000), j); } } } /* create shared memory */ hugepage = create_shared_memory(eal_hugepage_data_path(), nr_hugefiles * sizeof(struct hugepage_file)); if (hugepage == NULL) { EAL_LOG(ERR, "Failed to create shared memory!"); goto fail; } memset(hugepage, 0, nr_hugefiles * sizeof(struct hugepage_file)); /* * unmap pages that we won't need (looks at used_hp). * also, sets final_va to NULL on pages that were unmapped. */ if (unmap_unneeded_hugepages(tmp_hp, used_hp, internal_conf->num_hugepage_sizes) < 0) { EAL_LOG(ERR, "Unmapping and locking hugepages failed!"); goto fail; } /* * copy stuff from malloc'd hugepage* to the actual shared memory. * this procedure only copies those hugepages that have orig_va * not NULL. has overflow protection. */ if (copy_hugepages_to_shared_mem(hugepage, nr_hugefiles, tmp_hp, nr_hugefiles) < 0) { EAL_LOG(ERR, "Copying tables to shared memory failed!"); goto fail; } #ifndef RTE_ARCH_64 /* for legacy 32-bit mode, we did not preallocate VA space, so do it */ if (internal_conf->legacy_mem && prealloc_segments(hugepage, nr_hugefiles)) { EAL_LOG(ERR, "Could not preallocate VA space for hugepages"); goto fail; } #endif /* remap all pages we do need into memseg list VA space, so that those * pages become first-class citizens in DPDK memory subsystem */ if (remap_needed_hugepages(hugepage, nr_hugefiles)) { EAL_LOG(ERR, "Couldn't remap hugepage files into memseg lists"); goto fail; } /* free the hugepage backing files */ if (internal_conf->hugepage_file.unlink_before_mapping && unlink_hugepage_files(tmp_hp, internal_conf->num_hugepage_sizes) < 0) { EAL_LOG(ERR, "Unlinking hugepage files failed!"); goto fail; } /* free the temporary hugepage table */ free(tmp_hp); tmp_hp = NULL; munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file)); hugepage = NULL; /* we're not going to allocate more pages, so release VA space for * unused memseg lists */ for (i = 0; i < RTE_MAX_MEMSEG_LISTS; i++) { struct rte_memseg_list *msl = &mcfg->memsegs[i]; size_t mem_sz; /* skip inactive lists */ if (msl->base_va == NULL) continue; /* skip lists where there is at least one page allocated */ if (msl->memseg_arr.count > 0) continue; /* this is an unused list, deallocate it */ mem_sz = msl->len; munmap(msl->base_va, mem_sz); msl->base_va = NULL; msl->len = 0; msl->heap = 0; /* destroy backing fbarray */ rte_fbarray_destroy(&msl->memseg_arr); } if (mcfg->dma_maskbits && rte_mem_check_dma_mask_thread_unsafe(mcfg->dma_maskbits)) { EAL_LOG(ERR, "%s(): couldn't allocate memory due to IOVA exceeding limits of current DMA mask.", __func__); goto fail; } return 0; fail: huge_recover_sigbus(); free(tmp_hp); if (hugepage != NULL) munmap(hugepage, nr_hugefiles * sizeof(struct hugepage_file)); return -1; } /* * uses fstat to report the size of a file on disk */ static off_t getFileSize(int fd) { struct stat st; if (fstat(fd, &st) < 0) return 0; return st.st_size; } /* * This creates the memory mappings in the secondary process to match that of * the server process. It goes through each memory segment in the DPDK runtime * configuration and finds the hugepages which form that segment, mapping them * in order to form a contiguous block in the virtual memory space */ static int eal_legacy_hugepage_attach(void) { struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; struct hugepage_file *hp = NULL; unsigned int num_hp = 0; unsigned int i = 0; unsigned int cur_seg; off_t size = 0; int fd, fd_hugepage = -1; if (aslr_enabled() > 0) { EAL_LOG(WARNING, "WARNING: Address Space Layout Randomization " "(ASLR) is enabled in the kernel."); EAL_LOG(WARNING, " This may cause issues with mapping memory " "into secondary processes"); } fd_hugepage = open(eal_hugepage_data_path(), O_RDONLY); if (fd_hugepage < 0) { EAL_LOG(ERR, "Could not open %s", eal_hugepage_data_path()); goto error; } size = getFileSize(fd_hugepage); hp = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd_hugepage, 0); if (hp == MAP_FAILED) { EAL_LOG(ERR, "Could not mmap %s", eal_hugepage_data_path()); goto error; } num_hp = size / sizeof(struct hugepage_file); EAL_LOG(DEBUG, "Analysing %u files", num_hp); /* map all segments into memory to make sure we get the addrs. the * segments themselves are already in memseg list (which is shared and * has its VA space already preallocated), so we just need to map * everything into correct addresses. */ for (i = 0; i < num_hp; i++) { struct hugepage_file *hf = &hp[i]; size_t map_sz = hf->size; void *map_addr = hf->final_va; int msl_idx, ms_idx; struct rte_memseg_list *msl; struct rte_memseg *ms; /* if size is zero, no more pages left */ if (map_sz == 0) break; fd = open(hf->filepath, O_RDWR); if (fd < 0) { EAL_LOG(ERR, "Could not open %s: %s", hf->filepath, strerror(errno)); goto error; } map_addr = mmap(map_addr, map_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, fd, 0); if (map_addr == MAP_FAILED) { EAL_LOG(ERR, "Could not map %s: %s", hf->filepath, strerror(errno)); goto fd_error; } /* set shared lock on the file. */ if (flock(fd, LOCK_SH) < 0) { EAL_LOG(DEBUG, "%s(): Locking file failed: %s", __func__, strerror(errno)); goto mmap_error; } /* find segment data */ msl = rte_mem_virt2memseg_list(map_addr); if (msl == NULL) { EAL_LOG(DEBUG, "%s(): Cannot find memseg list", __func__); goto mmap_error; } ms = rte_mem_virt2memseg(map_addr, msl); if (ms == NULL) { EAL_LOG(DEBUG, "%s(): Cannot find memseg", __func__); goto mmap_error; } msl_idx = msl - mcfg->memsegs; ms_idx = rte_fbarray_find_idx(&msl->memseg_arr, ms); if (ms_idx < 0) { EAL_LOG(DEBUG, "%s(): Cannot find memseg idx", __func__); goto mmap_error; } /* store segment fd internally */ if (eal_memalloc_set_seg_fd(msl_idx, ms_idx, fd) < 0) EAL_LOG(ERR, "Could not store segment fd: %s", rte_strerror(rte_errno)); } /* unmap the hugepage config file, since we are done using it */ munmap(hp, size); close(fd_hugepage); return 0; mmap_error: munmap(hp[i].final_va, hp[i].size); fd_error: close(fd); error: /* unwind mmap's done so far */ for (cur_seg = 0; cur_seg < i; cur_seg++) munmap(hp[cur_seg].final_va, hp[cur_seg].size); if (hp != NULL && hp != MAP_FAILED) munmap(hp, size); if (fd_hugepage >= 0) close(fd_hugepage); return -1; } static int eal_hugepage_attach(void) { if (eal_memalloc_sync_with_primary()) { EAL_LOG(ERR, "Could not map memory from primary process"); if (aslr_enabled() > 0) EAL_LOG(ERR, "It is recommended to disable ASLR in the kernel and retry running both primary and secondary processes"); return -1; } return 0; } int rte_eal_hugepage_init(void) { const struct internal_config *internal_conf = eal_get_internal_configuration(); return internal_conf->legacy_mem ? eal_legacy_hugepage_init() : eal_dynmem_hugepage_init(); } int rte_eal_hugepage_attach(void) { const struct internal_config *internal_conf = eal_get_internal_configuration(); return internal_conf->legacy_mem ? eal_legacy_hugepage_attach() : eal_hugepage_attach(); } RTE_EXPORT_SYMBOL(rte_eal_using_phys_addrs) int rte_eal_using_phys_addrs(void) { if (phys_addrs_available == -1) { uint64_t tmp = 0; if (rte_eal_has_hugepages() != 0 && rte_mem_virt2phy(&tmp) != RTE_BAD_PHYS_ADDR) phys_addrs_available = 1; else phys_addrs_available = 0; } return phys_addrs_available; } static int __rte_unused memseg_primary_init_32(void) { /* limit total amount of memory on 32-bit */ const uint64_t mem32_max_mem = 2ULL << 30; struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; int active_sockets, hpi_idx, msl_idx = 0; unsigned int socket_id, i; struct rte_memseg_list *msl; uint64_t extra_mem_per_socket, total_extra_mem, total_requested_mem; struct internal_config *internal_conf = eal_get_internal_configuration(); /* no-huge does not need this at all */ if (internal_conf->no_hugetlbfs) return 0; /* this is a giant hack, but desperate times call for desperate * measures. in legacy 32-bit mode, we cannot preallocate VA space, * because having upwards of 2 gigabytes of VA space already mapped will * interfere with our ability to map and sort hugepages. * * therefore, in legacy 32-bit mode, we will be initializing memseg * lists much later - in eal_memory.c, right after we unmap all the * unneeded pages. this will not affect secondary processes, as those * should be able to mmap the space without (too many) problems. */ if (internal_conf->legacy_mem) return 0; /* 32-bit mode is a very special case. we cannot know in advance where * the user will want to allocate their memory, so we have to do some * heuristics. */ active_sockets = 0; total_requested_mem = 0; if (internal_conf->force_numa) for (i = 0; i < rte_socket_count(); i++) { uint64_t mem; socket_id = rte_socket_id_by_idx(i); mem = internal_conf->numa_mem[socket_id]; if (mem == 0) continue; active_sockets++; total_requested_mem += mem; } else total_requested_mem = internal_conf->memory; if (total_requested_mem > mem32_max_mem) { EAL_LOG(ERR, "Invalid parameters: 32-bit process can at most use %uM of memory", (unsigned int)(mem32_max_mem >> 20)); return -1; } total_extra_mem = mem32_max_mem - total_requested_mem; extra_mem_per_socket = active_sockets == 0 ? total_extra_mem : total_extra_mem / active_sockets; /* the allocation logic is a little bit convoluted, but here's how it * works, in a nutshell: * - if user hasn't specified on which sockets to allocate memory via * --socket-mem, we allocate all of our memory on main core socket. * - if user has specified sockets to allocate memory on, there may be * some "unused" memory left (e.g. if user has specified --socket-mem * such that not all memory adds up to 2 gigabytes), so add it to all * sockets that are in use equally. * * page sizes are sorted by size in descending order, so we can safely * assume that we dispense with bigger page sizes first. */ /* create memseg lists */ for (i = 0; i < rte_socket_count(); i++) { int hp_sizes = (int) internal_conf->num_hugepage_sizes; uint64_t max_socket_mem, cur_socket_mem; unsigned int main_lcore_socket; struct rte_config *cfg = rte_eal_get_configuration(); bool skip; int ret; ret = rte_socket_id_by_idx(i); if (ret == -1) { EAL_LOG(ERR, "Cannot get socket ID for socket index %u", i); return -1; } socket_id = (unsigned int)ret; #ifndef RTE_EAL_NUMA_AWARE_HUGEPAGES /* we can still sort pages by socket in legacy mode */ if (!internal_conf->legacy_mem && socket_id > 0) break; #endif /* if we didn't specifically request memory on this socket */ skip = active_sockets != 0 && internal_conf->numa_mem[socket_id] == 0; /* ...or if we didn't specifically request memory on *any* * socket, and this is not main lcore */ main_lcore_socket = rte_lcore_to_socket_id(cfg->main_lcore); skip |= active_sockets == 0 && socket_id != main_lcore_socket; if (skip) { EAL_LOG(DEBUG, "Will not preallocate memory on socket %u", socket_id); continue; } /* max amount of memory on this socket */ max_socket_mem = (active_sockets != 0 ? internal_conf->numa_mem[socket_id] : internal_conf->memory) + extra_mem_per_socket; cur_socket_mem = 0; for (hpi_idx = 0; hpi_idx < hp_sizes; hpi_idx++) { uint64_t max_pagesz_mem, cur_pagesz_mem = 0; uint64_t hugepage_sz; uint64_t pagesz_mem_limit; struct hugepage_info *hpi; hpi = &internal_conf->hugepage_info[hpi_idx]; hugepage_sz = hpi->hugepage_sz; /* check if pages are actually available */ if (hpi->num_pages[socket_id] == 0) continue; max_pagesz_mem = max_socket_mem - cur_socket_mem; pagesz_mem_limit = internal_conf->hugepage_mem_sz_limits[hpi_idx]; max_pagesz_mem = RTE_MIN(max_pagesz_mem, pagesz_mem_limit); /* make it multiple of page size */ max_pagesz_mem = RTE_ALIGN_FLOOR(max_pagesz_mem, hugepage_sz); if (max_pagesz_mem == 0) continue; EAL_LOG(DEBUG, "Attempting to preallocate " "%" PRIu64 "M on socket %i", max_pagesz_mem >> 20, socket_id); while (cur_pagesz_mem < max_pagesz_mem) { uint64_t rem_mem; unsigned int n_segs; rem_mem = max_pagesz_mem - cur_pagesz_mem; n_segs = rem_mem / hugepage_sz; while (n_segs > 0) { if (msl_idx >= RTE_MAX_MEMSEG_LISTS) { EAL_LOG(ERR, "No more space in memseg lists, please increase RTE_MAX_MEMSEG_LISTS"); return -1; } msl = &mcfg->memsegs[msl_idx]; if (eal_memseg_list_init(msl, hugepage_sz, n_segs, socket_id, msl_idx, true) < 0) { /* failing to allocate a memseg list is a serious error. */ EAL_LOG(ERR, "Cannot allocate memseg list"); return -1; } if (eal_memseg_list_alloc(msl, 0) == 0) break; if (memseg_list_free(msl)) return -1; EAL_LOG(DEBUG, "Cannot allocate VA space for memseg list, retrying with smaller chunk"); n_segs /= 2; } if (n_segs == 0) break; cur_pagesz_mem += (uint64_t)n_segs * hugepage_sz; cur_socket_mem += (uint64_t)n_segs * hugepage_sz; msl_idx++; } } if (cur_socket_mem == 0) { EAL_LOG(ERR, "Cannot allocate VA space on socket %u", socket_id); return -1; } } return 0; } static int __rte_unused memseg_primary_init(void) { return eal_dynmem_memseg_lists_init(); } static int __rte_unused memseg_secondary_init_dynmem(void) { struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; int msl_idx = 0; struct rte_memseg_list *msl; void *mem_va_addr; size_t mem_va_len; if (mcfg->mem_va_addr == 0 || mcfg->mem_va_len == 0 || mcfg->mem_va_page_sz == 0) { EAL_LOG(ERR, "Missing shared dynamic memory VA range from primary process"); return -1; } mem_va_addr = (void *)(uintptr_t)mcfg->mem_va_addr; mem_va_len = mcfg->mem_va_len; if (eal_get_virtual_area(mem_va_addr, &mem_va_len, mcfg->mem_va_page_sz, 0, 0) == NULL) { EAL_LOG(ERR, "Cannot reserve VA space for hugepage memory"); return -1; } for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) { msl = &mcfg->memsegs[msl_idx]; /* skip empty and external memseg lists */ if (msl->memseg_arr.len == 0 || msl->external) continue; if (rte_fbarray_attach(&msl->memseg_arr)) { EAL_LOG(ERR, "Cannot attach to primary process memseg lists"); eal_mem_free(mem_va_addr, mem_va_len); return -1; } if (eal_memseg_list_assign(msl, msl->base_va)) { EAL_LOG(ERR, "Cannot assign VA space for hugepage memory"); eal_mem_free(mem_va_addr, mem_va_len); return -1; } EAL_LOG(DEBUG, "Attaching segment list: n_segs:%u socket_id:%d hugepage_sz:%" PRIu64, msl->memseg_arr.len, msl->socket_id, msl->page_sz); } return 0; } static int memseg_secondary_init_legacy(void) { struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; int msl_idx = 0; struct rte_memseg_list *msl; for (msl_idx = 0; msl_idx < RTE_MAX_MEMSEG_LISTS; msl_idx++) { msl = &mcfg->memsegs[msl_idx]; /* skip empty and external memseg lists */ if (msl->memseg_arr.len == 0 || msl->external) continue; if (rte_fbarray_attach(&msl->memseg_arr)) { EAL_LOG(ERR, "Cannot attach to primary process memseg lists"); return -1; } /* preallocate VA space */ if (eal_memseg_list_alloc(msl, 0)) { EAL_LOG(ERR, "Cannot preallocate VA space for hugepage memory"); return -1; } } return 0; } static int memseg_secondary_init(void) { #ifdef RTE_ARCH_64 const struct internal_config *internal_conf = eal_get_internal_configuration(); /* for 32-bit dynmem init is same as legacy */ if (!internal_conf->legacy_mem) return memseg_secondary_init_dynmem(); #endif return memseg_secondary_init_legacy(); } int rte_eal_memseg_init(void) { /* increase rlimit to maximum */ struct rlimit lim; #ifndef RTE_EAL_NUMA_AWARE_HUGEPAGES const struct internal_config *internal_conf = eal_get_internal_configuration(); #endif if (getrlimit(RLIMIT_NOFILE, &lim) == 0) { /* set limit to maximum */ lim.rlim_cur = lim.rlim_max; if (setrlimit(RLIMIT_NOFILE, &lim) < 0) { EAL_LOG(DEBUG, "Setting maximum number of open files failed: %s", strerror(errno)); } else { EAL_LOG(DEBUG, "Setting maximum number of open files to %" PRIu64, (uint64_t)lim.rlim_cur); } } else { EAL_LOG(ERR, "Cannot get current resource limits"); } #ifndef RTE_EAL_NUMA_AWARE_HUGEPAGES if (!internal_conf->legacy_mem && rte_socket_count() > 1) { EAL_LOG(WARNING, "DPDK is running on a NUMA system, but is compiled without NUMA support."); EAL_LOG(WARNING, "This will have adverse consequences for performance and usability."); EAL_LOG(WARNING, "Please use --legacy-mem option, or recompile with NUMA support."); } #endif return rte_eal_process_type() == RTE_PROC_PRIMARY ? #ifndef RTE_ARCH_64 memseg_primary_init_32() : #else memseg_primary_init() : #endif memseg_secondary_init(); }