test/debug/vmpagequeues.c

   1 /*
   2  * VMPAGEINFO.C
   3  *
   4  * cc -I/usr/src/sys vmpagequeues.c -o ~/bin/vmpagequeues -lkvm
   5  *
   6  * vmpagequeues
   7  *
   8  * Outputs statistics on PQ_FREE (-f, default), or -c, -i, -a for
   9  * PQ_CACHE, PQ_INACTIVE, and PQ_ACTIVE.
  10  *
  11  * Copyright (c) 2016 The DragonFly Project.  All rights reserved.
  12  *
  13  * This code is derived from software contributed to The DragonFly Project
  14  * by Matthew Dillon <dillon@backplane.com>
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  *
  20  * 1. Redistributions of source code must retain the above copyright
  21  *    notice, this list of conditions and the following disclaimer.
  22  * 2. Redistributions in binary form must reproduce the above copyright
  23  *    notice, this list of conditions and the following disclaimer in
  24  *    the documentation and/or other materials provided with the
  25  *    distribution.
  26  * 3. Neither the name of The DragonFly Project nor the names of its
  27  *    contributors may be used to endorse or promote products derived
  28  *    from this software without specific, prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  31  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  32  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  33  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  34  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  35  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  36  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  37  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  38  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  39  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  40  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  41  * SUCH DAMAGE.
  42  */
  43
  44 #define _KERNEL_STRUCTURES_
  45 #include <sys/param.h>
  46 #include <sys/user.h>
  47 #include <sys/malloc.h>
  48 #include <sys/signalvar.h>
  49 #include <sys/vnode.h>
  50 #include <sys/namecache.h>
  51 #include <sys/slaballoc.h>
  52
  53 #include <vm/vm.h>
  54 #include <vm/vm_page.h>
  55 #include <vm/vm_kern.h>
  56 #include <vm/vm_object.h>
  57 #include <vm/swap_pager.h>
  58 #include <vm/vnode_pager.h>
  59
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include <string.h>
  63 #include <fcntl.h>
  64 #include <kvm.h>
  65 #include <nlist.h>
  66 #include <getopt.h>
  67
  68 struct nlist Nl[] = {
  69 #if 0
  70     { "_vm_page_buckets" },
  71     { "_vm_page_hash_mask" },
  72 #endif
  73     { "_vm_page_queues" },
  74     { NULL }
  75 };
  76
  77 int debugopt;
  78 int verboseopt;
  79
  80 static void kkread_vmpage(kvm_t *kd, u_long addr, vm_page_t m);
  81 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
  82 static int kkread_err(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
  83
  84 int
  85 main(int ac, char **av)
  86 {
  87     const char *corefile = NULL;
  88     const char *sysfile = NULL;
  89     kvm_t *kd;
  90     int ch;
  91     int i;
  92     int q = PQ_FREE;
  93     struct vpgqueues queues[PQ_COUNT];
  94
  95     while ((ch = getopt(ac, av, "M:N:dviacf")) != -1) {
  96         switch(ch) {
  97         case 'i':
  98             q = PQ_INACTIVE;
  99             break;
 100         case 'a':
 101             q = PQ_ACTIVE;
 102             break;
 103         case 'c':
 104             q = PQ_CACHE;
 105             break;
 106         case 'f':
 107             q = PQ_FREE;
 108             break;
 109         case 'd':
 110             ++debugopt;
 111             break;
 112         case 'v':
 113             ++verboseopt;
 114             break;
 115         case 'M':
 116             corefile = optarg;
 117             break;
 118         case 'N':
 119             sysfile = optarg;
 120             break;
 121         default:
 122             fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
 123             exit(1);
 124         }
 125     }
 126     ac -= optind;
 127     av += optind;
 128
 129     if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
 130         perror("kvm_open");
 131         exit(1);
 132     }
 133     if (kvm_nlist(kd, Nl) != 0) {
 134         perror("kvm_nlist");
 135         exit(1);
 136     }
 137
 138     for (;;) {
 139         kkread(kd, Nl[0].n_value, queues, sizeof(queues));
 140         for (i = 0; i < PQ_L2_SIZE; ++i) {
 141                 struct vpgqueues *vpq = &queues[q+i];
 142                 if ((i & 7) == 0)
 143                         printf("%3d ", i);
 144                 printf("\t%6d", vpq->lcnt);
 145                 if ((i & 7) == 7)
 146                         printf("\n");
 147                 if ((i & 63) == 63)
 148                         printf("\n");
 149         }
 150         printf("\n");
 151         sleep(1);
 152     }
 153     return(0);
 154 }
 155
 156 static void
 157 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
 158 {
 159     if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
 160         perror("kvm_read");
 161         exit(1);
 162     }
 163 }
 164
 165 static int
 166 kkread_err(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
 167 {
 168     if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
 169         return 1;
 170     }
 171     return 0;
 172 }