sys/vm/vm_meter.c

   1 /*
   2  * (MPSAFE)
   3  *
   4  * Copyright (c) 1982, 1986, 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  *      @(#)vm_meter.c  8.4 (Berkeley) 1/4/94
  36  * $FreeBSD: src/sys/vm/vm_meter.c,v 1.34.2.7 2002/10/10 19:28:22 dillon Exp $
  37  * $DragonFly: src/sys/vm/vm_meter.c,v 1.15 2008/04/28 18:04:08 dillon Exp $
  38  */
  39
  40 #include <sys/param.h>
  41 #include <sys/proc.h>
  42 #include <sys/systm.h>
  43 #include <sys/kernel.h>
  44 #include <sys/resource.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 <sys/lock.h>
  52 #include <vm/pmap.h>
  53 #include <vm/vm_map.h>
  54 #include <vm/vm_object.h>
  55 #include <sys/sysctl.h>
  56
  57 struct vmstats vmstats;
  58
  59 static int maxslp = MAXSLP;
  60
  61 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
  62         CTLFLAG_RW, &vmstats.v_free_min, 0,
  63         "Minimum number of pages desired free");
  64 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
  65         CTLFLAG_RW, &vmstats.v_free_target, 0,
  66         "Number of pages desired free");
  67 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
  68         CTLFLAG_RW, &vmstats.v_free_reserved, 0,
  69         "Number of pages reserved for deadlock");
  70 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
  71         CTLFLAG_RW, &vmstats.v_inactive_target, 0,
  72         "Number of pages desired inactive");
  73 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
  74         CTLFLAG_RW, &vmstats.v_cache_min, 0,
  75         "Min number of pages desired on cache queue");
  76 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
  77         CTLFLAG_RW, &vmstats.v_cache_max, 0,
  78         "Max number of pages in cached obj");
  79 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
  80         CTLFLAG_RW, &vmstats.v_pageout_free_min, 0,
  81         "Min number pages reserved for kernel");
  82 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
  83         CTLFLAG_RW, &vmstats.v_free_severe, 0, "");
  84
  85 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
  86     &averunnable, loadavg, "Machine loadaverage history");
  87
  88 static int do_vmtotal_callback(struct proc *p, void *data);
  89
  90 /*
  91  * No requirements.
  92  */
  93 static int
  94 do_vmtotal(SYSCTL_HANDLER_ARGS)
  95 {
  96         struct vmtotal total;
  97         struct vmtotal *totalp;
  98         vm_object_t object;
  99
 100         bzero(&total, sizeof(total));
 101         totalp = &total;
 102
 103         /*
 104          * Mark all objects as inactive.
 105          */
 106         lwkt_gettoken(&vmobj_token);
 107         for (object = TAILQ_FIRST(&vm_object_list);
 108             object != NULL;
 109             object = TAILQ_NEXT(object,object_list)) {
 110                 if (object->type == OBJT_MARKER)
 111                         continue;
 112                 vm_object_clear_flag(object, OBJ_ACTIVE);
 113         }
 114         lwkt_reltoken(&vmobj_token);
 115
 116         /*
 117          * Calculate process statistics.
 118          */
 119         allproc_scan(do_vmtotal_callback, totalp);
 120
 121         /*
 122          * Calculate object memory usage statistics.
 123          */
 124         lwkt_gettoken(&vmobj_token);
 125         for (object = TAILQ_FIRST(&vm_object_list);
 126             object != NULL;
 127             object = TAILQ_NEXT(object, object_list)) {
 128                 /*
 129                  * devices, like /dev/mem, will badly skew our totals.
 130                  * markers aren't real objects.
 131                  */
 132                 if (object->type == OBJT_MARKER)
 133                         continue;
 134                 if (object->type == OBJT_DEVICE)
 135                         continue;
 136                 if (object->size >= 0x7FFFFFFF) {
 137                         /*
 138                          * Probably unbounded anonymous memory (really
 139                          * bounded by related vm_map_entry structures which
 140                          * we do not have access to in this loop).
 141                          */
 142                         totalp->t_vm += object->resident_page_count;
 143                 } else {
 144                         /*
 145                          * It's questionable how useful this is but...
 146                          */
 147                         totalp->t_vm += object->size;
 148                 }
 149                 totalp->t_rm += object->resident_page_count;
 150                 if (object->flags & OBJ_ACTIVE) {
 151                         totalp->t_avm += object->size;
 152                         totalp->t_arm += object->resident_page_count;
 153                 }
 154                 if (object->shadow_count > 1) {
 155                         /* shared object */
 156                         totalp->t_vmshr += object->size;
 157                         totalp->t_rmshr += object->resident_page_count;
 158                         if (object->flags & OBJ_ACTIVE) {
 159                                 totalp->t_avmshr += object->size;
 160                                 totalp->t_armshr += object->resident_page_count;
 161                         }
 162                 }
 163         }
 164         lwkt_reltoken(&vmobj_token);
 165         totalp->t_free = vmstats.v_free_count + vmstats.v_cache_count;
 166
 167         return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
 168 }
 169
 170 /*
 171  * The caller must hold proc_token.
 172  */
 173 static int
 174 do_vmtotal_callback(struct proc *p, void *data)
 175 {
 176         struct vmtotal *totalp = data;
 177         struct lwp *lp;
 178         vm_map_entry_t entry;
 179         vm_map_t map;
 180         int paging;
 181
 182         if (p->p_flag & P_SYSTEM)
 183                 return(0);
 184
 185         FOREACH_LWP_IN_PROC(lp, p) {
 186                 switch (lp->lwp_stat) {
 187                 case LSSTOP:
 188                 case LSSLEEP:
 189                         if ((p->p_flag & P_SWAPPEDOUT) == 0) {
 190                                 if ((lp->lwp_flag & LWP_SINTR) == 0)
 191                                         totalp->t_dw++;
 192                                 else if (lp->lwp_slptime < maxslp)
 193                                         totalp->t_sl++;
 194                         } else if (lp->lwp_slptime < maxslp) {
 195                                 totalp->t_sw++;
 196                         }
 197                         if (lp->lwp_slptime >= maxslp)
 198                                 return(0);
 199                         break;
 200
 201                 case LSRUN:
 202                         if (p->p_flag & P_SWAPPEDOUT)
 203                                 totalp->t_sw++;
 204                         else
 205                                 totalp->t_rq++;
 206                         if (p->p_stat == SIDL)
 207                                 return(0);
 208                         break;
 209
 210                 default:
 211                         return (0);
 212                 }
 213         }
 214
 215         /*
 216          * Note active objects.
 217          */
 218         paging = 0;
 219         lwkt_gettoken(&vm_token);
 220         if (p->p_vmspace) {
 221                 map = &p->p_vmspace->vm_map;
 222                 vm_map_lock_read(map);
 223                 for (entry = map->header.next;
 224                      entry != &map->header; entry = entry->next) {
 225                         if (entry->maptype != VM_MAPTYPE_NORMAL &&
 226                             entry->maptype != VM_MAPTYPE_VPAGETABLE) {
 227                                 continue;
 228                         }
 229                         if (entry->object.vm_object == NULL)
 230                                 continue;
 231                         vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
 232                         paging |= entry->object.vm_object->paging_in_progress;
 233                 }
 234                 vm_map_unlock_read(map);
 235         }
 236         lwkt_reltoken(&vm_token);
 237         if (paging)
 238                 totalp->t_pw++;
 239         return(0);
 240 }
 241
 242 /*
 243  * No requirements.
 244  */
 245 static int
 246 do_vmstats(SYSCTL_HANDLER_ARGS)
 247 {
 248         struct vmstats vms = vmstats;
 249         return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
 250 }
 251
 252 /*
 253  * No requirements.
 254  */
 255 static int
 256 do_vmmeter(SYSCTL_HANDLER_ARGS)
 257 {
 258         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 259         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 260         struct vmmeter vmm;
 261         int i;
 262
 263         bzero(&vmm, sizeof(vmm));
 264         for (i = 0; i < ncpus; ++i) {
 265                 int off;
 266                 struct globaldata *gd = globaldata_find(i);
 267
 268                 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 269                         *(u_int *)((char *)&vmm + off) +=
 270                                 *(u_int *)((char *)&gd->gd_cnt + off);
 271                 }
 272
 273         }
 274         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
 275         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 276 }
 277
 278 /*
 279  * vcnt() -     accumulate statistics from the cnt structure for each cpu
 280  *
 281  *      The vmmeter structure is now per-cpu as well as global.  Those
 282  *      statistics which can be kept on a per-cpu basis (to avoid cache
 283  *      stalls between cpus) can be moved to the per-cpu vmmeter.  Remaining
 284  *      statistics, such as v_free_reserved, are left in the global
 285  *      structure.
 286  *
 287  * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
 288  *
 289  * No requirements.
 290  */
 291 static int
 292 vcnt(SYSCTL_HANDLER_ARGS)
 293 {
 294         int i;
 295         int count = 0;
 296         int offset = arg2;
 297
 298         for (i = 0; i < ncpus; ++i) {
 299                 struct globaldata *gd = globaldata_find(i);
 300                 count += *(int *)((char *)&gd->gd_cnt + offset);
 301         }
 302         return(SYSCTL_OUT(req, &count, sizeof(int)));
 303 }
 304
 305 /*
 306  * No requirements.
 307  */
 308 static int
 309 vcnt_intr(SYSCTL_HANDLER_ARGS)
 310 {
 311         int i;
 312         int count = 0;
 313
 314         for (i = 0; i < ncpus; ++i) {
 315                 struct globaldata *gd = globaldata_find(i);
 316
 317                 count += gd->gd_cnt.v_intr + gd->gd_cnt.v_ipi +
 318                          gd->gd_cnt.v_timer;
 319         }
 320         return(SYSCTL_OUT(req, &count, sizeof(int)));
 321 }
 322
 323 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
 324
 325 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
 326     0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
 327     "System virtual memory aggregate");
 328 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
 329     0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
 330     "System virtual memory statistics");
 331 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
 332     0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
 333     "System statistics");
 334 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
 335 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
 336 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
 337 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
 338
 339 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
 340         0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
 341 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
 342         0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "Intransit map collisions (total)");
 343 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
 344         0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "Intransit map collisions which blocked");
 345 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
 346         0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "Forwarded interrupts due to MP lock");
 347 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
 348         0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "Forwarded hits due to MP lock");
 349 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
 350         0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "Forwarded misses due to MP lock");
 351 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
 352         0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
 353 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
 354         0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
 355 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
 356         0, VMMETEROFF(v_intr), vcnt_intr, "IU", "Hardware interrupts");
 357 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_ipi, CTLTYPE_UINT|CTLFLAG_RD,
 358         0, VMMETEROFF(v_ipi), vcnt, "IU", "Inter-processor interrupts");
 359 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_timer, CTLTYPE_UINT|CTLFLAG_RD,
 360         0, VMMETEROFF(v_timer), vcnt, "IU", "LAPIC timer interrupts");
 361 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
 362         0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
 363 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
 364         0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
 365 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
 366         0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
 367 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
 368         0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
 369 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
 370         0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
 371 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
 372         0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
 373 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
 374         0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
 375 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
 376         0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
 377 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
 378         0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
 379 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
 380         0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
 381 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
 382         0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
 383 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
 384         0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
 385 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
 386         0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
 387 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
 388         0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
 389 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
 390         0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
 391 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
 392         0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
 393 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 394         0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
 395 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ppwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 396         0, VMMETEROFF(v_ppwakeups), vcnt, "IU", "vm_wait wakeups");
 397 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
 398         0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
 399 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
 400         0, VMMETEROFF(v_dfree), vcnt, "IU", "Pages freed by daemon");
 401 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
 402         0, VMMETEROFF(v_pfree), vcnt, "IU", "Pages freed by exiting processes");
 403 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
 404         0, VMMETEROFF(v_tfree), vcnt, "IU", "Total pages freed");
 405 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
 406         0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
 407 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
 408         0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
 409 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
 410         0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
 411 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
 412         0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
 413 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
 414         0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
 415 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 416         0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
 417 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 418         0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
 419 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
 420         0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
 421
 422 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 423         v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0,
 424         "Page size in bytes");
 425 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 426         v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0,
 427         "Total number of pages in system");
 428 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 429         v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0,
 430         "Number of pages reserved for deadlock");
 431 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 432         v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0,
 433         "Number of pages desired free");
 434 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 435         v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0,
 436         "Minimum number of pages desired free");
 437 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 438         v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0,
 439         "Number of pages free");
 440 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 441         v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0,
 442         "Number of pages wired down");
 443 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 444         v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0,
 445         "Number of pages active");
 446 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 447         v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0,
 448         "Number of pages desired inactive");
 449 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 450         v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0,
 451         "Number of pages inactive");
 452 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 453         v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0,
 454         "Number of pages on buffer cache queue");
 455 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 456         v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0,
 457         "Min number of pages desired on cache queue");
 458 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 459         v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0,
 460         "Max number of pages in cached obj");
 461 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 462         v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0,
 463         "Min number pages reserved for kernel");
 464 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 465         v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0,
 466         "Reserved number of pages for int code");
 467 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 468         zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0,
 469         "Number of zeroing pages");
 470
 471 /*
 472  * No requirements.
 473  */
 474 static int
 475 do_vmmeter_pcpu(SYSCTL_HANDLER_ARGS)
 476 {
 477         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 478         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 479         struct globaldata *gd = arg1;
 480         struct vmmeter vmm;
 481         int off;
 482
 483         bzero(&vmm, sizeof(vmm));
 484         for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 485                 *(u_int *)((char *)&vmm + off) +=
 486                         *(u_int *)((char *)&gd->gd_cnt + off);
 487         }
 488         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
 489         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 490 }
 491
 492 /*
 493  * Called from the low level boot code only.
 494  */
 495 static void
 496 vmmeter_init(void *dummy __unused)
 497 {
 498         int i;
 499
 500         for (i = 0; i < ncpus; ++i) {
 501                 struct sysctl_ctx_list *ctx;
 502                 struct sysctl_oid *oid;
 503                 struct globaldata *gd;
 504                 char name[32];
 505
 506                 ksnprintf(name, sizeof(name), "cpu%d", i);
 507
 508                 ctx = kmalloc(sizeof(*ctx), M_TEMP, M_WAITOK);
 509                 sysctl_ctx_init(ctx);
 510                 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_vm),
 511                                       OID_AUTO, name, CTLFLAG_RD, 0, "");
 512
 513                 gd = globaldata_find(i);
 514                 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
 515                                 "vmmeter", CTLTYPE_OPAQUE|CTLFLAG_RD,
 516                                 gd, sizeof(struct vmmeter), do_vmmeter_pcpu,
 517                                 "S,vmmeter", "System per-cpu statistics");
 518         }
 519 }
 520 SYSINIT(vmmeter, SI_SUB_PSEUDO, SI_ORDER_ANY, vmmeter_init, 0);