vm_stat.tproj/vm_stat.c

   1 /*
   2  * Copyright (c) 1999-2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  *      File:   vm_stat.c
  26  *      Author: Avadis Tevanian, Jr.
  27  *
  28  *      Copyright (C) 1986, Avadis Tevanian, Jr.
  29  *
  30  *
  31  *      Display Mach VM statistics.
  32  *
  33  ************************************************************************
  34  * HISTORY
  35  *  6-Jun-86  Avadis Tevanian, Jr. (avie) at Carnegie-Mellon University
  36  *      Use official Mach interface.
  37  *
  38  *  25-mar-99   A.Ramesh at Apple
  39  *              Ported to MacOS X
  40  *
  41  *  22-Jan-09   R.Branche at Apple
  42  *              Changed some fields to 64-bit to alleviate overflows
  43  ************************************************************************
  44  */
  45
  46 #include <err.h>
  47 #include <stddef.h>
  48 #include <stdlib.h>
  49 #include <unistd.h>
  50 #include <stdio.h>
  51
  52 #include <mach/mach.h>
  53 #include <mach/vm_page_size.h>
  54
  55 vm_statistics64_data_t  vm_stat, last;
  56 char    *pgmname;
  57 mach_port_t myHost;
  58
  59 void usage(void);
  60 void snapshot(void);
  61 void sspstat(char *str, uint64_t n);
  62 void banner(void);
  63 void print_stats(void);
  64 void get_stats(vm_statistics64_t stat);
  65
  66 void pstat(uint64_t n, int width);
  67
  68 int
  69 main(int argc, char *argv[])
  70 {
  71         double delay = 0.0;
  72         int count = 0;
  73
  74         pgmname = argv[0];
  75
  76         setlinebuf (stdout);
  77
  78         int c;
  79         while ((c = getopt (argc, argv, "c:")) != -1) {
  80                 switch (c) {
  81                         case 'c':
  82                                 count = (int)strtol(optarg, NULL, 10);
  83                                 if (count < 1) {
  84                                         warnx("count must be positive");
  85                                         usage();
  86                                 }
  87                                 break;
  88                         default:
  89                                 usage();
  90                                 break;
  91                 }
  92         }
  93
  94         argc -= optind; argv += optind;
  95
  96         if (argc == 1) {
  97                 delay = strtod(argv[0], NULL);
  98                 if (delay < 0.0)
  99                         usage();
 100         } else if (argc > 1) {
 101                 usage();
 102         }
 103
 104         myHost = mach_host_self();
 105
 106         if (delay == 0.0) {
 107                 snapshot();
 108         } else {
 109                 print_stats();
 110                 for (int i = 1; i < count || count == 0; i++ ){
 111                         usleep((int)(delay * USEC_PER_SEC));
 112                         print_stats();
 113                 }
 114         }
 115         exit(EXIT_SUCCESS);
 116 }
 117
 118 void
 119 usage(void)
 120 {
 121         fprintf(stderr, "usage: %s [[-c count] interval]\n", pgmname);
 122         exit(EXIT_FAILURE);
 123 }
 124
 125 void
 126 snapshot(void)
 127 {
 128         get_stats(&vm_stat);
 129         printf("Mach Virtual Memory Statistics: (page size of %llu bytes)\n", (mach_vm_size_t)vm_kernel_page_size);
 130
 131         sspstat("Pages free:", (uint64_t) (vm_stat.free_count - vm_stat.speculative_count));
 132         sspstat("Pages active:", (uint64_t) (vm_stat.active_count));
 133         sspstat("Pages inactive:", (uint64_t) (vm_stat.inactive_count));
 134         sspstat("Pages speculative:", (uint64_t) (vm_stat.speculative_count));
 135         sspstat("Pages throttled:", (uint64_t) (vm_stat.throttled_count));
 136         sspstat("Pages wired down:", (uint64_t) (vm_stat.wire_count));
 137         sspstat("Pages purgeable:", (uint64_t) (vm_stat.purgeable_count));
 138         sspstat("\"Translation faults\":", (uint64_t) (vm_stat.faults));
 139         sspstat("Pages copy-on-write:", (uint64_t) (vm_stat.cow_faults));
 140         sspstat("Pages zero filled:", (uint64_t) (vm_stat.zero_fill_count));
 141         sspstat("Pages reactivated:", (uint64_t) (vm_stat.reactivations));
 142         sspstat("Pages purged:", (uint64_t) (vm_stat.purges));
 143         sspstat("File-backed pages:", (uint64_t) (vm_stat.external_page_count));
 144         sspstat("Anonymous pages:", (uint64_t) (vm_stat.internal_page_count));
 145         sspstat("Pages stored in compressor:", (uint64_t) (vm_stat.total_uncompressed_pages_in_compressor));
 146         sspstat("Pages occupied by compressor:", (uint64_t) (vm_stat.compressor_page_count));
 147         sspstat("Decompressions:", (uint64_t) (vm_stat.decompressions));
 148         sspstat("Compressions:", (uint64_t) (vm_stat.compressions));
 149         sspstat("Pageins:", (uint64_t) (vm_stat.pageins));
 150         sspstat("Pageouts:", (uint64_t) (vm_stat.pageouts));
 151         sspstat("Swapins:", (uint64_t) (vm_stat.swapins));
 152         sspstat("Swapouts:", (uint64_t) (vm_stat.swapouts));
 153 }
 154
 155 void
 156 sspstat(char *str, uint64_t n)
 157 {
 158         printf("%-30s %16llu.\n", str, n);
 159 }
 160
 161 void
 162 banner(void)
 163 {
 164         get_stats(&vm_stat);
 165         printf("Mach Virtual Memory Statistics: ");
 166         printf("(page size of %llu bytes)\n", (mach_vm_size_t)vm_kernel_page_size);
 167         printf("%8s %8s %8s %8s %8s %8s %8s %8s %8s %8s %8s %8s %11s %9s %8s %8s %8s %8s %8s %8s %8s %8s\n",
 168                "free",
 169                "active",
 170                "specul",
 171                "inactive",
 172                "throttle",
 173                "wired",
 174                "prgable",
 175                "faults",
 176                "copy",
 177                "0fill",
 178                "reactive",
 179                "purged",
 180                "file-backed",
 181                "anonymous",
 182                "cmprssed",
 183                "cmprssor",
 184                "dcomprs",
 185                "comprs",
 186                "pageins",
 187                "pageout",
 188                "swapins",
 189                "swapouts");
 190         bzero(&last, sizeof(last));
 191 }
 192
 193 void
 194 print_stats(void)
 195 {
 196         static int count = 0;
 197
 198         if (count++ == 0)
 199                 banner();
 200
 201         if (count > 20)
 202                 count = 0;
 203
 204         get_stats(&vm_stat);
 205         pstat((uint64_t) (vm_stat.free_count - vm_stat.speculative_count), 8);
 206         pstat((uint64_t) (vm_stat.active_count), 8);
 207         pstat((uint64_t) (vm_stat.speculative_count), 8);
 208         pstat((uint64_t) (vm_stat.inactive_count), 8);
 209         pstat((uint64_t) (vm_stat.throttled_count), 8);
 210         pstat((uint64_t) (vm_stat.wire_count), 8);
 211         pstat((uint64_t) (vm_stat.purgeable_count), 8);
 212         pstat((uint64_t) (vm_stat.faults - last.faults), 8);
 213         pstat((uint64_t) (vm_stat.cow_faults - last.cow_faults), 8);
 214         pstat((uint64_t) (vm_stat.zero_fill_count - last.zero_fill_count), 8);
 215         pstat((uint64_t) (vm_stat.reactivations - last.reactivations), 8);
 216         pstat((uint64_t) (vm_stat.purges - last.purges), 8);
 217         pstat((uint64_t) (vm_stat.external_page_count), 11);
 218         pstat((uint64_t) (vm_stat.internal_page_count), 9);
 219         pstat((uint64_t) (vm_stat.total_uncompressed_pages_in_compressor), 8);
 220         pstat((uint64_t) (vm_stat.compressor_page_count), 8);
 221         pstat((uint64_t) (vm_stat.decompressions - last.decompressions), 8);
 222         pstat((uint64_t) (vm_stat.compressions - last.compressions), 8);
 223         pstat((uint64_t) (vm_stat.pageins - last.pageins), 8);
 224         pstat((uint64_t) (vm_stat.pageouts - last.pageouts), 8);
 225         pstat((uint64_t) (vm_stat.swapins - last.swapins), 8);
 226         pstat((uint64_t) (vm_stat.swapouts - last.swapouts), 8);
 227         putchar('\n');
 228         last = vm_stat;
 229 }
 230
 231 void
 232 pstat(uint64_t n, int width)
 233 {
 234         char buf[80];
 235         if (width >= sizeof(buf)) {
 236                 width = sizeof(buf) -1;
 237         }
 238
 239         /* Now that we have the speculative field, there is really not enough
 240          space, but we were actually overflowing three or four fields before
 241          anyway.  So any field that overflows we drop some insignifigant
 242          digets and slap on the appropriate suffix
 243         */
 244         int w = snprintf(buf, sizeof(buf), "%*llu", width, n);
 245         if (w > width) {
 246                 w = snprintf(buf, sizeof(buf), "%*lluK", width -1, n / 1000);
 247                 if (w > width) {
 248                         w = snprintf(buf, sizeof(buf), "%*lluM", width -1, n / 1000000);
 249                         if (w > width) {
 250                                 w = snprintf(buf, sizeof(buf), "%*lluG", width -1, n / 1000000000);
 251                         }
 252                 }
 253         }
 254         fputs(buf, stdout);
 255         putchar(' ');
 256 }
 257
 258 void
 259 get_stats(vm_statistics64_t stat)
 260 {
 261         unsigned int count = HOST_VM_INFO64_COUNT;
 262         kern_return_t ret;
 263         if ((ret = host_statistics64(myHost, HOST_VM_INFO64, (host_info64_t)stat, &count) != KERN_SUCCESS)) {
 264                 fprintf(stderr, "%s: failed to get statistics. error %d\n", pgmname, ret);
 265                 exit(EXIT_FAILURE);
 266         }
 267 }