bf96595915
of times the system was forced to sleep when requesting a new allocation. Expand the debugger hook, db_show_uma, to display these results as well. This has proven to be very useful in out of memory situations when it is not known why systems have become sluggish or fail in odd ways. Reviewed by: rwatson alc Approved by: scottl (mentor) peter Obtained from: Yahoo Inc.
430 lines
8.6 KiB
C
430 lines
8.6 KiB
C
/*-
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* Copyright (c) 2005 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "memstat.h"
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#include "memstat_internal.h"
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const char *
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memstat_strerror(int error)
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{
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switch (error) {
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case MEMSTAT_ERROR_NOMEMORY:
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return ("Cannot allocate memory");
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case MEMSTAT_ERROR_VERSION:
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return ("Version mismatch");
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case MEMSTAT_ERROR_PERMISSION:
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return ("Permission denied");
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case MEMSTAT_ERROR_TOOMANYCPUS:
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return ("Too many CPUs");
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case MEMSTAT_ERROR_DATAERROR:
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return ("Data format error");
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case MEMSTAT_ERROR_KVM:
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return ("KVM error");
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case MEMSTAT_ERROR_KVM_NOSYMBOL:
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return ("KVM unable to find symbol");
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case MEMSTAT_ERROR_KVM_SHORTREAD:
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return ("KVM short read");
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case MEMSTAT_ERROR_UNDEFINED:
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default:
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return ("Unknown error");
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}
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}
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struct memory_type_list *
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memstat_mtl_alloc(void)
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{
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struct memory_type_list *mtlp;
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mtlp = malloc(sizeof(*mtlp));
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if (mtlp == NULL)
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return (NULL);
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LIST_INIT(&mtlp->mtl_list);
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mtlp->mtl_error = MEMSTAT_ERROR_UNDEFINED;
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return (mtlp);
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}
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struct memory_type *
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memstat_mtl_first(struct memory_type_list *list)
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{
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return (LIST_FIRST(&list->mtl_list));
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}
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struct memory_type *
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memstat_mtl_next(struct memory_type *mtp)
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{
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return (LIST_NEXT(mtp, mt_list));
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}
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void
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_memstat_mtl_empty(struct memory_type_list *list)
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{
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struct memory_type *mtp;
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while ((mtp = LIST_FIRST(&list->mtl_list))) {
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LIST_REMOVE(mtp, mt_list);
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free(mtp);
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}
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}
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void
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memstat_mtl_free(struct memory_type_list *list)
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{
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_memstat_mtl_empty(list);
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free(list);
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}
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int
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memstat_mtl_geterror(struct memory_type_list *list)
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{
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return (list->mtl_error);
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}
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/*
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* Look for an existing memory_type entry in a memory_type list, based on the
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* allocator and name of the type. If not found, return NULL. No errno or
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* memstat error.
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*/
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struct memory_type *
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memstat_mtl_find(struct memory_type_list *list, int allocator,
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const char *name)
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{
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struct memory_type *mtp;
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LIST_FOREACH(mtp, &list->mtl_list, mt_list) {
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if ((mtp->mt_allocator == allocator ||
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allocator == ALLOCATOR_ANY) &&
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strcmp(mtp->mt_name, name) == 0)
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return (mtp);
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}
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return (NULL);
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}
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/*
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* Allocate a new memory_type with the specificed allocator type and name,
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* then insert into the list. The structure will be zero'd.
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*
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* libmemstat(3) internal function.
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*/
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struct memory_type *
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_memstat_mt_allocate(struct memory_type_list *list, int allocator,
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const char *name)
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{
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struct memory_type *mtp;
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mtp = malloc(sizeof(*mtp));
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if (mtp == NULL)
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return (NULL);
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bzero(mtp, sizeof(*mtp));
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mtp->mt_allocator = allocator;
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strlcpy(mtp->mt_name, name, MEMTYPE_MAXNAME);
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LIST_INSERT_HEAD(&list->mtl_list, mtp, mt_list);
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return (mtp);
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}
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/*
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* Reset any libmemstat(3)-owned statistics in a memory_type record so that
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* it can be reused without incremental addition problems. Caller-owned
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* memory is left "as-is", and must be updated by the caller if desired.
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*
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* libmemstat(3) internal function.
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*/
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void
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_memstat_mt_reset_stats(struct memory_type *mtp)
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{
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int i;
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mtp->mt_countlimit = 0;
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mtp->mt_byteslimit = 0;
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mtp->mt_sizemask = 0;
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mtp->mt_size = 0;
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mtp->mt_memalloced = 0;
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mtp->mt_memfreed = 0;
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mtp->mt_numallocs = 0;
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mtp->mt_numfrees = 0;
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mtp->mt_bytes = 0;
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mtp->mt_count = 0;
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mtp->mt_free = 0;
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mtp->mt_failures = 0;
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mtp->mt_sleeps = 0;
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mtp->mt_zonefree = 0;
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mtp->mt_kegfree = 0;
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for (i = 0; i < MEMSTAT_MAXCPU; i++) {
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mtp->mt_percpu_alloc[i].mtp_memalloced = 0;
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mtp->mt_percpu_alloc[i].mtp_memfreed = 0;
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mtp->mt_percpu_alloc[i].mtp_numallocs = 0;
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mtp->mt_percpu_alloc[i].mtp_numfrees = 0;
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mtp->mt_percpu_alloc[i].mtp_sizemask = 0;
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mtp->mt_percpu_cache[i].mtp_free = 0;
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}
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}
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/*
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* Accessor methods for struct memory_type. Avoids encoding the structure
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* ABI into the application.
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*/
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const char *
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memstat_get_name(const struct memory_type *mtp)
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{
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return (mtp->mt_name);
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}
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int
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memstat_get_allocator(const struct memory_type *mtp)
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{
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return (mtp->mt_allocator);
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}
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uint64_t
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memstat_get_countlimit(const struct memory_type *mtp)
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{
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return (mtp->mt_countlimit);
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}
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uint64_t
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memstat_get_byteslimit(const struct memory_type *mtp)
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{
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return (mtp->mt_byteslimit);
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}
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uint64_t
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memstat_get_sizemask(const struct memory_type *mtp)
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{
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return (mtp->mt_sizemask);
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}
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uint64_t
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memstat_get_size(const struct memory_type *mtp)
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{
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return (mtp->mt_size);
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}
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uint64_t
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memstat_get_memalloced(const struct memory_type *mtp)
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{
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return (mtp->mt_memalloced);
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}
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uint64_t
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memstat_get_memfreed(const struct memory_type *mtp)
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{
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return (mtp->mt_memfreed);
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}
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uint64_t
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memstat_get_numallocs(const struct memory_type *mtp)
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{
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return (mtp->mt_numallocs);
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}
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uint64_t
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memstat_get_numfrees(const struct memory_type *mtp)
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{
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return (mtp->mt_numfrees);
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}
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uint64_t
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memstat_get_bytes(const struct memory_type *mtp)
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{
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return (mtp->mt_bytes);
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}
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uint64_t
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memstat_get_count(const struct memory_type *mtp)
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{
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return (mtp->mt_count);
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}
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uint64_t
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memstat_get_free(const struct memory_type *mtp)
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{
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return (mtp->mt_free);
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}
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uint64_t
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memstat_get_failures(const struct memory_type *mtp)
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{
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return (mtp->mt_failures);
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}
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uint64_t
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memstat_get_sleeps(const struct memory_type *mtp)
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{
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return (mtp->mt_sleeps);
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}
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void *
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memstat_get_caller_pointer(const struct memory_type *mtp, int index)
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{
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return (mtp->mt_caller_pointer[index]);
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}
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void
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memstat_set_caller_pointer(struct memory_type *mtp, int index, void *value)
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{
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mtp->mt_caller_pointer[index] = value;
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}
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uint64_t
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memstat_get_caller_uint64(const struct memory_type *mtp, int index)
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{
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return (mtp->mt_caller_uint64[index]);
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}
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void
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memstat_set_caller_uint64(struct memory_type *mtp, int index, uint64_t value)
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{
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mtp->mt_caller_uint64[index] = value;
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}
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uint64_t
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memstat_get_zonefree(const struct memory_type *mtp)
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{
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return (mtp->mt_zonefree);
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}
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uint64_t
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memstat_get_kegfree(const struct memory_type *mtp)
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{
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return (mtp->mt_kegfree);
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}
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uint64_t
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memstat_get_percpu_memalloced(const struct memory_type *mtp, int cpu)
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{
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return (mtp->mt_percpu_alloc[cpu].mtp_memalloced);
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}
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uint64_t
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memstat_get_percpu_memfreed(const struct memory_type *mtp, int cpu)
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{
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return (mtp->mt_percpu_alloc[cpu].mtp_memfreed);
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}
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uint64_t
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memstat_get_percpu_numallocs(const struct memory_type *mtp, int cpu)
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{
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return (mtp->mt_percpu_alloc[cpu].mtp_numallocs);
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}
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uint64_t
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memstat_get_percpu_numfrees(const struct memory_type *mtp, int cpu)
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{
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return (mtp->mt_percpu_alloc[cpu].mtp_numfrees);
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}
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uint64_t
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memstat_get_percpu_sizemask(const struct memory_type *mtp, int cpu)
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{
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return (mtp->mt_percpu_alloc[cpu].mtp_sizemask);
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}
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void *
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memstat_get_percpu_caller_pointer(const struct memory_type *mtp, int cpu,
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int index)
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{
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return (mtp->mt_percpu_alloc[cpu].mtp_caller_pointer[index]);
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}
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void
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memstat_set_percpu_caller_pointer(struct memory_type *mtp, int cpu,
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int index, void *value)
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{
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mtp->mt_percpu_alloc[cpu].mtp_caller_pointer[index] = value;
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}
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uint64_t
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memstat_get_percpu_caller_uint64(const struct memory_type *mtp, int cpu,
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int index)
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{
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return (mtp->mt_percpu_alloc[cpu].mtp_caller_uint64[index]);
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}
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void
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memstat_set_percpu_caller_uint64(struct memory_type *mtp, int cpu, int index,
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uint64_t value)
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{
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mtp->mt_percpu_alloc[cpu].mtp_caller_uint64[index] = value;
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}
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uint64_t
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memstat_get_percpu_free(const struct memory_type *mtp, int cpu)
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{
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return (mtp->mt_percpu_cache[cpu].mtp_free);
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}
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