From: Damjan Marion Date: Wed, 24 Oct 2018 10:56:32 +0000 (+0200) Subject: vppinfra: autodetect default hugepage size X-Git-Tag: v19.04-rc0~546 X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commitdiff_plain;h=9787f5f90a6802e39fa7954c344ba89b03a6c4af vppinfra: autodetect default hugepage size Change-Id: I5ff713ad0b254c74c5622e3b9425cca365b5ee97 Signed-off-by: Damjan Marion --- diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c index 6553fca77ec..b9b3b15f2dc 100644 --- a/src/plugins/dpdk/device/init.c +++ b/src/plugins/dpdk/device/init.c @@ -1284,15 +1284,17 @@ dpdk_config (vlib_main_t * vm, unformat_input_t * input) /* *INDENT-ON* */ } + uword default_hugepage_sz = clib_mem_get_default_hugepage_size (); /* *INDENT-OFF* */ clib_bitmap_foreach (c, tm->cpu_socket_bitmap, ( { clib_error_t *e; - + uword n_pages; vec_validate(mem_by_socket, c); + n_pages = round_pow2 (mem_by_socket[c], default_hugepage_sz); + n_pages /= default_hugepage_sz; - e = clib_sysfs_prealloc_hugepages(c, 0, mem_by_socket[c] / 2); - if (e) + if ((e = clib_sysfs_prealloc_hugepages(c, 0, n_pages))) clib_error_report (e); })); /* *INDENT-ON* */ diff --git a/src/vppinfra/linux/mem.c b/src/vppinfra/linux/mem.c index 2fbda966bc0..6a551ec0554 100644 --- a/src/vppinfra/linux/mem.c +++ b/src/vppinfra/linux/mem.c @@ -46,6 +46,41 @@ #define F_SEAL_WRITE 0x0008 /* prevent writes */ #endif + +uword +clib_mem_get_page_size (void) +{ + return getpagesize (); +} + +uword +clib_mem_get_default_hugepage_size (void) +{ + unformat_input_t input; + static u32 size = 0; + int fd; + + if (size) + goto done; + + if ((fd = open ("/proc/meminfo", 0)) == -1) + return 0; + + unformat_init_clib_file (&input, fd); + + while (unformat_check_input (&input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (&input, "Hugepagesize:%_%u kB", &size)) + ; + else + unformat_skip_line (&input); + } + unformat_free (&input); + close (fd); +done: + return 1024ULL * size; +} + u64 clib_mem_vm_get_page_size (int fd) { diff --git a/src/vppinfra/linux/sysfs.c b/src/vppinfra/linux/sysfs.c index 199e6bbfd69..c45897fc83b 100644 --- a/src/vppinfra/linux/sysfs.c +++ b/src/vppinfra/linux/sysfs.c @@ -22,8 +22,6 @@ #include #include -#define DEFAULT_HUGETLB_SIZE 2048 - clib_error_t * clib_sysfs_write (char *file_name, char *fmt, ...) { @@ -121,8 +119,12 @@ clib_sysfs_set_nr_hugepages (int numa_node, int log2_page_size, int nr) clib_error_t *error = 0; struct stat sb; u8 *p = 0; - int page_size = log2_page_size ? 1ULL << (log2_page_size - 10) : - DEFAULT_HUGETLB_SIZE; + uword page_size; + + if (log2_page_size == 0) + log2_page_size = min_log2 (clib_mem_get_default_hugepage_size ()); + + page_size = 1ULL << (log2_page_size - 10); p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0); @@ -168,8 +170,14 @@ clib_sysfs_get_xxx_hugepages (char *type, int numa_node, clib_error_t *error = 0; struct stat sb; u8 *p = 0; - int page_size = log2_page_size ? 1ULL << (log2_page_size - 10) : - DEFAULT_HUGETLB_SIZE; + + uword page_size; + + if (log2_page_size == 0) + log2_page_size = min_log2 (clib_mem_get_default_hugepage_size ()); + + page_size = 1ULL << (log2_page_size - 10); + p = format (p, "/sys/devices/system/node/node%u%c", numa_node, 0); @@ -232,8 +240,13 @@ clib_sysfs_prealloc_hugepages (int numa_node, int log2_page_size, int nr) { clib_error_t *error = 0; int n, needed; - int page_size = log2_page_size ? 1ULL << (log2_page_size - 10) : - DEFAULT_HUGETLB_SIZE; + uword page_size; + + if (log2_page_size == 0) + log2_page_size = min_log2 (clib_mem_get_default_hugepage_size ()); + + page_size = 1ULL << (log2_page_size - 10); + error = clib_sysfs_get_free_hugepages (numa_node, log2_page_size, &n); if (error) return error; diff --git a/src/vppinfra/mem.h b/src/vppinfra/mem.h index 04c26d218aa..813ff6c88d8 100644 --- a/src/vppinfra/mem.h +++ b/src/vppinfra/mem.h @@ -390,6 +390,7 @@ clib_error_t *clib_mem_create_hugetlb_fd (char *name, int *fdp); clib_error_t *clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a); void clib_mem_vm_ext_free (clib_mem_vm_alloc_t * a); u64 clib_mem_vm_get_page_size (int fd); +uword clib_mem_get_default_hugepage_size (void); int clib_mem_vm_get_log2_page_size (int fd); u64 *clib_mem_vm_get_paddr (void *mem, int log2_page_size, int n_pages); diff --git a/src/vppinfra/mem_dlmalloc.c b/src/vppinfra/mem_dlmalloc.c index 6268709bb36..e83e0e89d21 100644 --- a/src/vppinfra/mem_dlmalloc.c +++ b/src/vppinfra/mem_dlmalloc.c @@ -229,33 +229,6 @@ clib_mem_init_thread_safe (void *memory, uword memory_size) return clib_mem_init (memory, memory_size); } -#ifdef CLIB_LINUX_KERNEL -#include - -uword -clib_mem_get_page_size (void) -{ - return PAGE_SIZE; -} -#endif - -#ifdef CLIB_UNIX -uword -clib_mem_get_page_size (void) -{ - return getpagesize (); -} -#endif - -/* Make a guess for standalone. */ -#ifdef CLIB_STANDALONE -uword -clib_mem_get_page_size (void) -{ - return 4096; -} -#endif - u8 * format_clib_mem_usage (u8 * s, va_list * va) { diff --git a/src/vppinfra/mem_mheap.c b/src/vppinfra/mem_mheap.c index f3387b72417..4077bf279fd 100644 --- a/src/vppinfra/mem_mheap.c +++ b/src/vppinfra/mem_mheap.c @@ -114,33 +114,6 @@ clib_mem_init_thread_safe (void *memory, uword memory_size) return heap; } -#ifdef CLIB_LINUX_KERNEL -#include - -uword -clib_mem_get_page_size (void) -{ - return PAGE_SIZE; -} -#endif - -#ifdef CLIB_UNIX -uword -clib_mem_get_page_size (void) -{ - return getpagesize (); -} -#endif - -/* Make a guess for standalone. */ -#ifdef CLIB_STANDALONE -uword -clib_mem_get_page_size (void) -{ - return 4096; -} -#endif - u8 * format_clib_mem_usage (u8 * s, va_list * va) { diff --git a/src/vppinfra/pmalloc.c b/src/vppinfra/pmalloc.c index 0f9df9c6641..a8b47d74c9b 100644 --- a/src/vppinfra/pmalloc.c +++ b/src/vppinfra/pmalloc.c @@ -55,26 +55,12 @@ pmalloc_validate_numa_node (u32 * numa_node) int clib_pmalloc_init (clib_pmalloc_main_t * pm, uword size) { - struct stat st; uword off, pagesize; - int fd; ASSERT (pm->error == 0); - pm->log2_page_sz = 21; - pm->error = clib_mem_create_hugetlb_fd ("detect_hugepage_size", &fd); - - if (pm->error) - return -1; - - if (fd != -1) - { - if (fstat (fd, &st) == -1) - pm->log2_page_sz = min_log2 (st.st_blksize); - close (fd); - } - - pagesize = 1ULL << pm->log2_page_sz; + pagesize = clib_mem_get_default_hugepage_size (); + pm->log2_page_sz = min_log2 (pagesize); size = size ? size : ((u64) DEFAULT_RESERVED_MB) << 20; size = round_pow2 (size, pagesize);