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 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
  64         CTLFLAG_RW, &vmstats.v_free_target, 0, "");
  65 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
  66         CTLFLAG_RW, &vmstats.v_free_reserved, 0, "");
  67 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
  68         CTLFLAG_RW, &vmstats.v_inactive_target, 0, "");
  69 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
  70         CTLFLAG_RW, &vmstats.v_cache_min, 0, "");
  71 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
  72         CTLFLAG_RW, &vmstats.v_cache_max, 0, "");
  73 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
  74         CTLFLAG_RW, &vmstats.v_pageout_free_min, 0, "");
  75 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
  76         CTLFLAG_RW, &vmstats.v_free_severe, 0, "");
  77
  78 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
  79     &averunnable, loadavg, "Machine loadaverage history");
  80
  81 static int do_vmtotal_callback(struct proc *p, void *data);
  82
  83 /*
  84  * No requirements.
  85  */
  86 static int
  87 do_vmtotal(SYSCTL_HANDLER_ARGS)
  88 {
  89         struct vmtotal total;
  90         struct vmtotal *totalp;
  91         vm_object_t object;
  92
  93         bzero(&total, sizeof(total));
  94         totalp = &total;
  95
  96         /*
  97          * Mark all objects as inactive.
  98          */
  99         lwkt_gettoken(&vmobj_token);
 100         for (object = TAILQ_FIRST(&vm_object_list);
 101             object != NULL;
 102             object = TAILQ_NEXT(object,object_list)) {
 103                 if (object->type == OBJT_MARKER)
 104                         continue;
 105                 vm_object_clear_flag(object, OBJ_ACTIVE);
 106         }
 107         lwkt_reltoken(&vmobj_token);
 108
 109         /*
 110          * Calculate process statistics.
 111          */
 112         allproc_scan(do_vmtotal_callback, totalp);
 113
 114         /*
 115          * Calculate object memory usage statistics.
 116          */
 117         lwkt_gettoken(&vmobj_token);
 118         for (object = TAILQ_FIRST(&vm_object_list);
 119             object != NULL;
 120             object = TAILQ_NEXT(object, object_list)) {
 121                 /*
 122                  * devices, like /dev/mem, will badly skew our totals.
 123                  * markers aren't real objects.
 124                  */
 125                 if (object->type == OBJT_MARKER)
 126                         continue;
 127                 if (object->type == OBJT_DEVICE)
 128                         continue;
 129                 if (object->size >= 0x7FFFFFFF) {
 130                         /*
 131                          * Probably unbounded anonymous memory (really
 132                          * bounded by related vm_map_entry structures which
 133                          * we do not have access to in this loop).
 134                          */
 135                         totalp->t_vm += object->resident_page_count;
 136                 } else {
 137                         /*
 138                          * It's questionable how useful this is but...
 139                          */
 140                         totalp->t_vm += object->size;
 141                 }
 142                 totalp->t_rm += object->resident_page_count;
 143                 if (object->flags & OBJ_ACTIVE) {
 144                         totalp->t_avm += object->size;
 145                         totalp->t_arm += object->resident_page_count;
 146                 }
 147                 if (object->shadow_count > 1) {
 148                         /* shared object */
 149                         totalp->t_vmshr += object->size;
 150                         totalp->t_rmshr += object->resident_page_count;
 151                         if (object->flags & OBJ_ACTIVE) {
 152                                 totalp->t_avmshr += object->size;
 153                                 totalp->t_armshr += object->resident_page_count;
 154                         }
 155                 }
 156         }
 157         lwkt_reltoken(&vmobj_token);
 158         totalp->t_free = vmstats.v_free_count + vmstats.v_cache_count;
 159
 160         return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
 161 }
 162
 163 /*
 164  * The caller must hold proc_token.
 165  */
 166 static int
 167 do_vmtotal_callback(struct proc *p, void *data)
 168 {
 169         struct vmtotal *totalp = data;
 170         struct lwp *lp;
 171         vm_map_entry_t entry;
 172         vm_map_t map;
 173         int paging;
 174
 175         if (p->p_flag & P_SYSTEM)
 176                 return(0);
 177
 178         FOREACH_LWP_IN_PROC(lp, p) {
 179                 switch (lp->lwp_stat) {
 180                 case LSSTOP:
 181                 case LSSLEEP:
 182                         if ((p->p_flag & P_SWAPPEDOUT) == 0) {
 183                                 if ((lp->lwp_flag & LWP_SINTR) == 0)
 184                                         totalp->t_dw++;
 185                                 else if (lp->lwp_slptime < maxslp)
 186                                         totalp->t_sl++;
 187                         } else if (lp->lwp_slptime < maxslp) {
 188                                 totalp->t_sw++;
 189                         }
 190                         if (lp->lwp_slptime >= maxslp)
 191                                 return(0);
 192                         break;
 193
 194                 case LSRUN:
 195                         if (p->p_flag & P_SWAPPEDOUT)
 196                                 totalp->t_sw++;
 197                         else
 198                                 totalp->t_rq++;
 199                         if (p->p_stat == SIDL)
 200                                 return(0);
 201                         break;
 202
 203                 default:
 204                         return (0);
 205                 }
 206         }
 207
 208         /*
 209          * Note active objects.
 210          */
 211         paging = 0;
 212         lwkt_gettoken(&vm_token);
 213         if (p->p_vmspace) {
 214                 map = &p->p_vmspace->vm_map;
 215                 vm_map_lock_read(map);
 216                 for (entry = map->header.next;
 217                      entry != &map->header; entry = entry->next) {
 218                         if (entry->maptype != VM_MAPTYPE_NORMAL &&
 219                             entry->maptype != VM_MAPTYPE_VPAGETABLE) {
 220                                 continue;
 221                         }
 222                         if (entry->object.vm_object == NULL)
 223                                 continue;
 224                         vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
 225                         paging |= entry->object.vm_object->paging_in_progress;
 226                 }
 227                 vm_map_unlock_read(map);
 228         }
 229         lwkt_reltoken(&vm_token);
 230         if (paging)
 231                 totalp->t_pw++;
 232         return(0);
 233 }
 234
 235 /*
 236  * No requirements.
 237  */
 238 static int
 239 do_vmstats(SYSCTL_HANDLER_ARGS)
 240 {
 241         struct vmstats vms = vmstats;
 242         return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
 243 }
 244
 245 /*
 246  * No requirements.
 247  */
 248 static int
 249 do_vmmeter(SYSCTL_HANDLER_ARGS)
 250 {
 251         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 252         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 253         struct vmmeter vmm;
 254         int i;
 255
 256         bzero(&vmm, sizeof(vmm));
 257         for (i = 0; i < ncpus; ++i) {
 258                 int off;
 259                 struct globaldata *gd = globaldata_find(i);
 260
 261                 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 262                         *(u_int *)((char *)&vmm + off) +=
 263                                 *(u_int *)((char *)&gd->gd_cnt + off);
 264                 }
 265
 266         }
 267         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
 268         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 269 }
 270
 271 /*
 272  * vcnt() -     accumulate statistics from the cnt structure for each cpu
 273  *
 274  *      The vmmeter structure is now per-cpu as well as global.  Those
 275  *      statistics which can be kept on a per-cpu basis (to avoid cache
 276  *      stalls between cpus) can be moved to the per-cpu vmmeter.  Remaining
 277  *      statistics, such as v_free_reserved, are left in the global
 278  *      structure.
 279  *
 280  * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
 281  *
 282  * No requirements.
 283  */
 284 static int
 285 vcnt(SYSCTL_HANDLER_ARGS)
 286 {
 287         int i;
 288         int count = 0;
 289         int offset = arg2;
 290
 291         for (i = 0; i < ncpus; ++i) {
 292                 struct globaldata *gd = globaldata_find(i);
 293                 count += *(int *)((char *)&gd->gd_cnt + offset);
 294         }
 295         return(SYSCTL_OUT(req, &count, sizeof(int)));
 296 }
 297
 298 /*
 299  * No requirements.
 300  */
 301 static int
 302 vcnt_intr(SYSCTL_HANDLER_ARGS)
 303 {
 304         int i;
 305         int count = 0;
 306
 307         for (i = 0; i < ncpus; ++i) {
 308                 struct globaldata *gd = globaldata_find(i);
 309
 310                 count += gd->gd_cnt.v_intr + gd->gd_cnt.v_ipi +
 311                          gd->gd_cnt.v_timer;
 312         }
 313         return(SYSCTL_OUT(req, &count, sizeof(int)));
 314 }
 315
 316 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
 317
 318 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
 319     0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
 320     "System virtual memory aggregate");
 321 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
 322     0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
 323     "System virtual memory statistics");
 324 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
 325     0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
 326     "System statistics");
 327 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
 328 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
 329 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
 330 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
 331
 332 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
 333         0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
 334 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
 335         0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "");
 336 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
 337         0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "");
 338 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
 339         0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "");
 340 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
 341         0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "");
 342 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
 343         0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "");
 344 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
 345         0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
 346 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
 347         0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
 348 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
 349         0, VMMETEROFF(v_intr), vcnt_intr, "IU", "Hardware interrupts");
 350 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_ipi, CTLTYPE_UINT|CTLFLAG_RD,
 351         0, VMMETEROFF(v_ipi), vcnt, "IU", "Inter-processor interrupts");
 352 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_timer, CTLTYPE_UINT|CTLFLAG_RD,
 353         0, VMMETEROFF(v_timer), vcnt, "IU", "LAPIC timer interrupts");
 354 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
 355         0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
 356 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
 357         0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
 358 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
 359         0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
 360 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
 361         0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
 362 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
 363         0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
 364 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
 365         0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
 366 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
 367         0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
 368 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
 369         0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
 370 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
 371         0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
 372 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
 373         0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
 374 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
 375         0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
 376 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
 377         0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
 378 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
 379         0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
 380 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
 381         0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
 382 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
 383         0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
 384 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
 385         0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
 386 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 387         0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
 388 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ppwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 389         0, VMMETEROFF(v_ppwakeups), vcnt, "IU", "vm_wait wakeups");
 390 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
 391         0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
 392 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
 393         0, VMMETEROFF(v_dfree), vcnt, "IU", "");
 394 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
 395         0, VMMETEROFF(v_pfree), vcnt, "IU", "");
 396 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
 397         0, VMMETEROFF(v_tfree), vcnt, "IU", "");
 398 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
 399         0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
 400 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
 401         0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
 402 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
 403         0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
 404 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
 405         0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
 406 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
 407         0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
 408 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 409         0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
 410 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 411         0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
 412 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
 413         0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
 414
 415 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 416         v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, "");
 417 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 418         v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, "");
 419 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 420         v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, "");
 421 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 422         v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, "");
 423 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 424         v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, "");
 425 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 426         v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, "");
 427 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 428         v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, "");
 429 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 430         v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, "");
 431 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 432         v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, "");
 433 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 434         v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, "");
 435 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 436         v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, "");
 437 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 438         v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, "");
 439 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 440         v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, "");
 441 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 442         v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, "");
 443 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 444         v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, "");
 445 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 446         zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");
 447
 448 /*
 449  * No requirements.
 450  */
 451 static int
 452 do_vmmeter_pcpu(SYSCTL_HANDLER_ARGS)
 453 {
 454         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 455         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 456         struct globaldata *gd = arg1;
 457         struct vmmeter vmm;
 458         int off;
 459
 460         bzero(&vmm, sizeof(vmm));
 461         for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 462                 *(u_int *)((char *)&vmm + off) +=
 463                         *(u_int *)((char *)&gd->gd_cnt + off);
 464         }
 465         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
 466         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 467 }
 468
 469 /*
 470  * Called from the low level boot code only.
 471  */
 472 static void
 473 vmmeter_init(void *dummy __unused)
 474 {
 475         int i;
 476
 477         for (i = 0; i < ncpus; ++i) {
 478                 struct sysctl_ctx_list *ctx;
 479                 struct sysctl_oid *oid;
 480                 struct globaldata *gd;
 481                 char name[32];
 482
 483                 ksnprintf(name, sizeof(name), "cpu%d", i);
 484
 485                 ctx = kmalloc(sizeof(*ctx), M_TEMP, M_WAITOK);
 486                 sysctl_ctx_init(ctx);
 487                 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_vm),
 488                                       OID_AUTO, name, CTLFLAG_RD, 0, "");
 489
 490                 gd = globaldata_find(i);
 491                 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
 492                                 "vmmeter", CTLTYPE_OPAQUE|CTLFLAG_RD,
 493                                 gd, sizeof(struct vmmeter), do_vmmeter_pcpu,
 494                                 "S,vmmeter", "System per-cpu statistics");
 495         }
 496 }
 497 SYSINIT(vmmeter, SI_SUB_PSEUDO, SI_ORDER_ANY, vmmeter_init, 0);