diff options
Diffstat (limited to 'lib/libmemstat/memstat.c')
-rw-r--r-- | lib/libmemstat/memstat.c | 433 |
1 files changed, 433 insertions, 0 deletions
diff --git a/lib/libmemstat/memstat.c b/lib/libmemstat/memstat.c new file mode 100644 index 0000000..c7957c8 --- /dev/null +++ b/lib/libmemstat/memstat.c @@ -0,0 +1,433 @@ +/*- + * Copyright (c) 2005 Robert N. M. Watson + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/sysctl.h> + +#include <err.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "memstat.h" +#include "memstat_internal.h" + +const char * +memstat_strerror(int error) +{ + + switch (error) { + case MEMSTAT_ERROR_NOMEMORY: + return ("Cannot allocate memory"); + case MEMSTAT_ERROR_VERSION: + return ("Version mismatch"); + case MEMSTAT_ERROR_PERMISSION: + return ("Permission denied"); + case MEMSTAT_ERROR_DATAERROR: + return ("Data format error"); + case MEMSTAT_ERROR_KVM: + return ("KVM error"); + case MEMSTAT_ERROR_KVM_NOSYMBOL: + return ("KVM unable to find symbol"); + case MEMSTAT_ERROR_KVM_SHORTREAD: + return ("KVM short read"); + case MEMSTAT_ERROR_UNDEFINED: + default: + return ("Unknown error"); + } +} + +struct memory_type_list * +memstat_mtl_alloc(void) +{ + struct memory_type_list *mtlp; + + mtlp = malloc(sizeof(*mtlp)); + if (mtlp == NULL) + return (NULL); + + LIST_INIT(&mtlp->mtl_list); + mtlp->mtl_error = MEMSTAT_ERROR_UNDEFINED; + return (mtlp); +} + +struct memory_type * +memstat_mtl_first(struct memory_type_list *list) +{ + + return (LIST_FIRST(&list->mtl_list)); +} + +struct memory_type * +memstat_mtl_next(struct memory_type *mtp) +{ + + return (LIST_NEXT(mtp, mt_list)); +} + +void +_memstat_mtl_empty(struct memory_type_list *list) +{ + struct memory_type *mtp; + + while ((mtp = LIST_FIRST(&list->mtl_list))) { + free(mtp->mt_percpu_alloc); + free(mtp->mt_percpu_cache); + LIST_REMOVE(mtp, mt_list); + free(mtp); + } +} + +void +memstat_mtl_free(struct memory_type_list *list) +{ + + _memstat_mtl_empty(list); + free(list); +} + +int +memstat_mtl_geterror(struct memory_type_list *list) +{ + + return (list->mtl_error); +} + +/* + * Look for an existing memory_type entry in a memory_type list, based on the + * allocator and name of the type. If not found, return NULL. No errno or + * memstat error. + */ +struct memory_type * +memstat_mtl_find(struct memory_type_list *list, int allocator, + const char *name) +{ + struct memory_type *mtp; + + LIST_FOREACH(mtp, &list->mtl_list, mt_list) { + if ((mtp->mt_allocator == allocator || + allocator == ALLOCATOR_ANY) && + strcmp(mtp->mt_name, name) == 0) + return (mtp); + } + return (NULL); +} + +/* + * Allocate a new memory_type with the specificed allocator type and name, + * then insert into the list. The structure will be zero'd. + * + * libmemstat(3) internal function. + */ +struct memory_type * +_memstat_mt_allocate(struct memory_type_list *list, int allocator, + const char *name, int maxcpus) +{ + struct memory_type *mtp; + + mtp = malloc(sizeof(*mtp)); + if (mtp == NULL) + return (NULL); + + bzero(mtp, sizeof(*mtp)); + + mtp->mt_allocator = allocator; + mtp->mt_percpu_alloc = malloc(sizeof(struct mt_percpu_alloc_s) * + maxcpus); + mtp->mt_percpu_cache = malloc(sizeof(struct mt_percpu_cache_s) * + maxcpus); + strlcpy(mtp->mt_name, name, MEMTYPE_MAXNAME); + LIST_INSERT_HEAD(&list->mtl_list, mtp, mt_list); + return (mtp); +} + +/* + * Reset any libmemstat(3)-owned statistics in a memory_type record so that + * it can be reused without incremental addition problems. Caller-owned + * memory is left "as-is", and must be updated by the caller if desired. + * + * libmemstat(3) internal function. + */ +void +_memstat_mt_reset_stats(struct memory_type *mtp, int maxcpus) +{ + int i; + + mtp->mt_countlimit = 0; + mtp->mt_byteslimit = 0; + mtp->mt_sizemask = 0; + mtp->mt_size = 0; + + mtp->mt_memalloced = 0; + mtp->mt_memfreed = 0; + mtp->mt_numallocs = 0; + mtp->mt_numfrees = 0; + mtp->mt_bytes = 0; + mtp->mt_count = 0; + mtp->mt_free = 0; + mtp->mt_failures = 0; + mtp->mt_sleeps = 0; + + mtp->mt_zonefree = 0; + mtp->mt_kegfree = 0; + + for (i = 0; i < maxcpus; i++) { + mtp->mt_percpu_alloc[i].mtp_memalloced = 0; + mtp->mt_percpu_alloc[i].mtp_memfreed = 0; + mtp->mt_percpu_alloc[i].mtp_numallocs = 0; + mtp->mt_percpu_alloc[i].mtp_numfrees = 0; + mtp->mt_percpu_alloc[i].mtp_sizemask = 0; + mtp->mt_percpu_cache[i].mtp_free = 0; + } +} + +/* + * Accessor methods for struct memory_type. Avoids encoding the structure + * ABI into the application. + */ +const char * +memstat_get_name(const struct memory_type *mtp) +{ + + return (mtp->mt_name); +} + +int +memstat_get_allocator(const struct memory_type *mtp) +{ + + return (mtp->mt_allocator); +} + +uint64_t +memstat_get_countlimit(const struct memory_type *mtp) +{ + + return (mtp->mt_countlimit); +} + +uint64_t +memstat_get_byteslimit(const struct memory_type *mtp) +{ + + return (mtp->mt_byteslimit); +} + +uint64_t +memstat_get_sizemask(const struct memory_type *mtp) +{ + + return (mtp->mt_sizemask); +} + +uint64_t +memstat_get_size(const struct memory_type *mtp) +{ + + return (mtp->mt_size); +} + +uint64_t +memstat_get_memalloced(const struct memory_type *mtp) +{ + + return (mtp->mt_memalloced); +} + +uint64_t +memstat_get_memfreed(const struct memory_type *mtp) +{ + + return (mtp->mt_memfreed); +} + +uint64_t +memstat_get_numallocs(const struct memory_type *mtp) +{ + + return (mtp->mt_numallocs); +} + +uint64_t +memstat_get_numfrees(const struct memory_type *mtp) +{ + + return (mtp->mt_numfrees); +} + +uint64_t +memstat_get_bytes(const struct memory_type *mtp) +{ + + return (mtp->mt_bytes); +} + +uint64_t +memstat_get_count(const struct memory_type *mtp) +{ + + return (mtp->mt_count); +} + +uint64_t +memstat_get_free(const struct memory_type *mtp) +{ + + return (mtp->mt_free); +} + +uint64_t +memstat_get_failures(const struct memory_type *mtp) +{ + + return (mtp->mt_failures); +} + +uint64_t +memstat_get_sleeps(const struct memory_type *mtp) +{ + + return (mtp->mt_sleeps); +} + +void * +memstat_get_caller_pointer(const struct memory_type *mtp, int index) +{ + + return (mtp->mt_caller_pointer[index]); +} + +void +memstat_set_caller_pointer(struct memory_type *mtp, int index, void *value) +{ + + mtp->mt_caller_pointer[index] = value; +} + +uint64_t +memstat_get_caller_uint64(const struct memory_type *mtp, int index) +{ + + return (mtp->mt_caller_uint64[index]); +} + +void +memstat_set_caller_uint64(struct memory_type *mtp, int index, uint64_t value) +{ + + mtp->mt_caller_uint64[index] = value; +} + +uint64_t +memstat_get_zonefree(const struct memory_type *mtp) +{ + + return (mtp->mt_zonefree); +} + +uint64_t +memstat_get_kegfree(const struct memory_type *mtp) +{ + + return (mtp->mt_kegfree); +} + +uint64_t +memstat_get_percpu_memalloced(const struct memory_type *mtp, int cpu) +{ + + return (mtp->mt_percpu_alloc[cpu].mtp_memalloced); +} + +uint64_t +memstat_get_percpu_memfreed(const struct memory_type *mtp, int cpu) +{ + + return (mtp->mt_percpu_alloc[cpu].mtp_memfreed); +} + +uint64_t +memstat_get_percpu_numallocs(const struct memory_type *mtp, int cpu) +{ + + return (mtp->mt_percpu_alloc[cpu].mtp_numallocs); +} + +uint64_t +memstat_get_percpu_numfrees(const struct memory_type *mtp, int cpu) +{ + + return (mtp->mt_percpu_alloc[cpu].mtp_numfrees); +} + +uint64_t +memstat_get_percpu_sizemask(const struct memory_type *mtp, int cpu) +{ + + return (mtp->mt_percpu_alloc[cpu].mtp_sizemask); +} + +void * +memstat_get_percpu_caller_pointer(const struct memory_type *mtp, int cpu, + int index) +{ + + return (mtp->mt_percpu_alloc[cpu].mtp_caller_pointer[index]); +} + +void +memstat_set_percpu_caller_pointer(struct memory_type *mtp, int cpu, + int index, void *value) +{ + + mtp->mt_percpu_alloc[cpu].mtp_caller_pointer[index] = value; +} + +uint64_t +memstat_get_percpu_caller_uint64(const struct memory_type *mtp, int cpu, + int index) +{ + + return (mtp->mt_percpu_alloc[cpu].mtp_caller_uint64[index]); +} + +void +memstat_set_percpu_caller_uint64(struct memory_type *mtp, int cpu, int index, + uint64_t value) +{ + + mtp->mt_percpu_alloc[cpu].mtp_caller_uint64[index] = value; +} + +uint64_t +memstat_get_percpu_free(const struct memory_type *mtp, int cpu) +{ + + return (mtp->mt_percpu_cache[cpu].mtp_free); +} |