sys/vm/vm_meter.c

   1 /*
   2  * Copyright (c) 1982, 1986, 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)vm_meter.c  8.4 (Berkeley) 1/4/94
  34  * $FreeBSD$
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/lock.h>
  41 #include <sys/mutex.h>
  42 #include <sys/proc.h>
  43 #include <sys/resource.h>
  44 #include <sys/sx.h>
  45 #include <sys/vmmeter.h>
  46
  47 #include <vm/vm.h>
  48 #include <vm/vm_page.h>
  49 #include <vm/vm_extern.h>
  50 #include <vm/vm_param.h>
  51 #include <vm/pmap.h>
  52 #include <vm/vm_map.h>
  53 #include <vm/vm_object.h>
  54 #include <sys/sysctl.h>
  55
  56 struct vmmeter cnt;
  57
  58 int maxslp = MAXSLP;
  59
  60 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
  61         CTLFLAG_RW, &cnt.v_free_min, 0, "");
  62 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
  63         CTLFLAG_RW, &cnt.v_free_target, 0, "");
  64 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
  65         CTLFLAG_RW, &cnt.v_free_reserved, 0, "");
  66 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
  67         CTLFLAG_RW, &cnt.v_inactive_target, 0, "");
  68 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
  69         CTLFLAG_RW, &cnt.v_cache_min, 0, "");
  70 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
  71         CTLFLAG_RW, &cnt.v_cache_max, 0, "");
  72 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
  73         CTLFLAG_RW, &cnt.v_pageout_free_min, 0, "");
  74 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
  75         CTLFLAG_RW, &cnt.v_free_severe, 0, "");
  76
  77 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
  78     &averunnable, loadavg, "Machine loadaverage history");
  79
  80 static int
  81 vmtotal(SYSCTL_HANDLER_ARGS)
  82 {
  83         struct proc *p;
  84         struct vmtotal total, *totalp;
  85         vm_map_entry_t entry;
  86         vm_object_t object;
  87         vm_map_t map;
  88         int paging;
  89         struct ksegrp *kg;
  90
  91         totalp = &total;
  92         bzero(totalp, sizeof *totalp);
  93         /*
  94          * Mark all objects as inactive.
  95          */
  96         GIANT_REQUIRED;
  97         TAILQ_FOREACH(object, &vm_object_list, object_list)
  98                 vm_object_clear_flag(object, OBJ_ACTIVE);
  99         /*
 100          * Calculate process statistics.
 101          */
 102         sx_slock(&allproc_lock);
 103         FOREACH_PROC_IN_SYSTEM(p) {
 104                 if (p->p_flag & P_SYSTEM)
 105                         continue;
 106                 mtx_lock_spin(&sched_lock);
 107                 switch (p->p_stat) {
 108                 case 0:
 109                         mtx_unlock_spin(&sched_lock);
 110                         continue;
 111
 112                 case SMTX:
 113                 case SSLEEP:
 114                 case SSTOP:
 115                         kg = &p->p_ksegrp;      /* XXXKSE */
 116                         if (p->p_sflag & PS_INMEM) {
 117                                 if (kg->kg_pri.pri_level <= PZERO)
 118                                         totalp->t_dw++;
 119                                 else if (kg->kg_slptime < maxslp)
 120                                         totalp->t_sl++;
 121                         } else if (kg->kg_slptime < maxslp)
 122                                 totalp->t_sw++;
 123                         if (kg->kg_slptime >= maxslp) {
 124                                 mtx_unlock_spin(&sched_lock);
 125                                 continue;
 126                         }
 127                         break;
 128
 129                 case SWAIT:
 130                         totalp->t_sl++;
 131                         continue;
 132
 133                 case SRUN:
 134                 case SIDL:
 135                         if (p->p_sflag & PS_INMEM)
 136                                 totalp->t_rq++;
 137                         else
 138                                 totalp->t_sw++;
 139                         if (p->p_stat == SIDL) {
 140                                 mtx_unlock_spin(&sched_lock);
 141                                 continue;
 142                         }
 143                         break;
 144                 }
 145                 mtx_unlock_spin(&sched_lock);
 146                 /*
 147                  * Note active objects.
 148                  */
 149                 paging = 0;
 150                 for (map = &p->p_vmspace->vm_map, entry = map->header.next;
 151                     entry != &map->header; entry = entry->next) {
 152                         if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
 153                             entry->object.vm_object == NULL)
 154                                 continue;
 155                         vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
 156                         paging |= entry->object.vm_object->paging_in_progress;
 157                 }
 158                 if (paging)
 159                         totalp->t_pw++;
 160         }
 161         sx_sunlock(&allproc_lock);
 162         /*
 163          * Calculate object memory usage statistics.
 164          */
 165         TAILQ_FOREACH(object, &vm_object_list, object_list) {
 166                 /*
 167                  * devices, like /dev/mem, will badly skew our totals
 168                  */
 169                 if (object->type == OBJT_DEVICE)
 170                         continue;
 171                 totalp->t_vm += object->size;
 172                 totalp->t_rm += object->resident_page_count;
 173                 if (object->flags & OBJ_ACTIVE) {
 174                         totalp->t_avm += object->size;
 175                         totalp->t_arm += object->resident_page_count;
 176                 }
 177                 if (object->shadow_count > 1) {
 178                         /* shared object */
 179                         totalp->t_vmshr += object->size;
 180                         totalp->t_rmshr += object->resident_page_count;
 181                         if (object->flags & OBJ_ACTIVE) {
 182                                 totalp->t_avmshr += object->size;
 183                                 totalp->t_armshr += object->resident_page_count;
 184                         }
 185                 }
 186         }
 187         totalp->t_free = cnt.v_free_count + cnt.v_cache_count;
 188         return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
 189 }
 190
 191 SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
 192     0, sizeof(struct vmtotal), vmtotal, "S,vmtotal",
 193     "System virtual memory statistics");
 194 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
 195 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
 196 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
 197 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
 198 SYSCTL_UINT(_vm_stats_sys, OID_AUTO,
 199         v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches");
 200 SYSCTL_UINT(_vm_stats_sys, OID_AUTO,
 201         v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps");
 202 SYSCTL_UINT(_vm_stats_sys, OID_AUTO,
 203         v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls");
 204 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD,
 205     &cnt.v_intr, 0, "Hardware interrupts");
 206 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD,
 207     &cnt.v_soft, 0, "Software interrupts");
 208 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 209         v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults");
 210 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 211         v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults");
 212 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 213         v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults");
 214 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 215         v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill");
 216 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 217         v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill");
 218 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 219         v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations");
 220 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 221         v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations");
 222 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 223         v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages");
 224 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 225         v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages");
 226 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 227         v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations");
 228 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 229         v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations");
 230 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 231         v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages");
 232 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 233         v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages");
 234 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 235         v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking");
 236 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 237         v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages");
 238 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 239         v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups");
 240 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 241         v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans");
 242 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 243         v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, "");
 244 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 245         v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, "");
 246 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 247         v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, "");
 248 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 249         v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, "");
 250 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 251         v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, "");
 252 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 253         v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, "");
 254 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 255         v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, "");
 256 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 257         v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, "");
 258 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 259         v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, "");
 260 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 261         v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, "");
 262 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 263         v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, "");
 264 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 265         v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, "");
 266 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 267         v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, "");
 268 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 269         v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, "");
 270 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 271         v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, "");
 272 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 273         v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, "");
 274 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 275         v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, "");
 276 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 277         v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, "");
 278 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 279         zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");
 280 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 281         v_forks, CTLFLAG_RD, &cnt.v_forks, 0, "Number of fork() calls");
 282 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 283         v_vforks, CTLFLAG_RD, &cnt.v_vforks, 0, "Number of vfork() calls");
 284 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 285         v_rforks, CTLFLAG_RD, &cnt.v_rforks, 0, "Number of rfork() calls");
 286 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 287         v_kthreads, CTLFLAG_RD, &cnt.v_kthreads, 0, "Number of fork() calls by kernel");
 288 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 289         v_forkpages, CTLFLAG_RD, &cnt.v_forkpages, 0, "VM pages affected by fork()");
 290 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 291         v_vforkpages, CTLFLAG_RD, &cnt.v_vforkpages, 0, "VM pages affected by vfork()");
 292 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 293         v_rforkpages, CTLFLAG_RD, &cnt.v_rforkpages, 0, "VM pages affected by rfork()");
 294 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 295         v_kthreadpages, CTLFLAG_RD, &cnt.v_kthreadpages, 0, "VM pages affected by fork() by kernel");
 296 #if 0
 297 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 298         page_mask, CTLFLAG_RD, &page_mask, 0, "");
 299 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 300         page_shift, CTLFLAG_RD, &page_shift, 0, "");
 301 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 302         first_page, CTLFLAG_RD, &first_page, 0, "");
 303 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 304         last_page, CTLFLAG_RD, &last_page, 0, "");
 305 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 306         vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, "");
 307 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 308         vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, "");
 309 #endif