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         struct vm_object marker;
  99         vm_object_t object;
 100         long collisions;
 101         int burst;
 102
 103         bzero(&total, sizeof(total));
 104         totalp = &total;
 105         bzero(&marker, sizeof(marker));
 106         marker.type = OBJT_MARKER;
 107         collisions = vmobj_token.t_collisions;
 108
 109 #if 0
 110         /*
 111          * Mark all objects as inactive.
 112          */
 113         lwkt_gettoken(&vmobj_token);
 114         for (object = TAILQ_FIRST(&vm_object_list);
 115             object != NULL;
 116             object = TAILQ_NEXT(object,object_list)) {
 117                 if (object->type == OBJT_MARKER)
 118                         continue;
 119                 vm_object_clear_flag(object, OBJ_ACTIVE);
 120         }
 121         lwkt_reltoken(&vmobj_token);
 122 #endif
 123
 124         /*
 125          * Calculate process statistics.
 126          */
 127         allproc_scan(do_vmtotal_callback, totalp);
 128
 129         /*
 130          * Calculate object memory usage statistics.
 131          */
 132         lwkt_gettoken(&vmobj_token);
 133         TAILQ_INSERT_HEAD(&vm_object_list, &marker, object_list);
 134         burst = 0;
 135
 136         for (object = TAILQ_FIRST(&vm_object_list);
 137             object != NULL;
 138             object = TAILQ_NEXT(object, object_list)) {
 139                 /*
 140                  * devices, like /dev/mem, will badly skew our totals.
 141                  * markers aren't real objects.
 142                  */
 143                 if (object->type == OBJT_MARKER)
 144                         continue;
 145                 if (object->type == OBJT_DEVICE)
 146                         continue;
 147                 if (object->size >= 0x7FFFFFFF) {
 148                         /*
 149                          * Probably unbounded anonymous memory (really
 150                          * bounded by related vm_map_entry structures which
 151                          * we do not have access to in this loop).
 152                          */
 153                         totalp->t_vm += object->resident_page_count;
 154                 } else {
 155                         /*
 156                          * It's questionable how useful this is but...
 157                          */
 158                         totalp->t_vm += object->size;
 159                 }
 160                 totalp->t_rm += object->resident_page_count;
 161                 if (object->flags & OBJ_ACTIVE) {
 162                         totalp->t_avm += object->size;
 163                         totalp->t_arm += object->resident_page_count;
 164                 }
 165                 if (object->shadow_count > 1) {
 166                         /* shared object */
 167                         totalp->t_vmshr += object->size;
 168                         totalp->t_rmshr += object->resident_page_count;
 169                         if (object->flags & OBJ_ACTIVE) {
 170                                 totalp->t_avmshr += object->size;
 171                                 totalp->t_armshr += object->resident_page_count;
 172                         }
 173                 }
 174
 175                 /*
 176                  * Don't waste time unnecessarily
 177                  */
 178                 if (++burst < 25)
 179                         continue;
 180                 burst = 0;
 181
 182                 /*
 183                  * Don't hog the vmobj_token if someone else wants it.
 184                  */
 185                 TAILQ_REMOVE(&vm_object_list, &marker, object_list);
 186                 TAILQ_INSERT_AFTER(&vm_object_list, object,
 187                                    &marker, object_list);
 188                 object = &marker;
 189                 if (collisions != vmobj_token.t_collisions) {
 190                         tsleep(&vm_object_list, 0, "breath", 1);
 191                         collisions = vmobj_token.t_collisions;
 192                 } else {
 193                         lwkt_yield();
 194                 }
 195         }
 196
 197         TAILQ_REMOVE(&vm_object_list, &marker, object_list);
 198         lwkt_reltoken(&vmobj_token);
 199
 200         totalp->t_free = vmstats.v_free_count + vmstats.v_cache_count;
 201
 202         return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
 203 }
 204
 205 /*
 206  * The caller must hold proc_token.
 207  */
 208 static int
 209 do_vmtotal_callback(struct proc *p, void *data)
 210 {
 211         struct vmtotal *totalp = data;
 212         struct lwp *lp;
 213
 214         if (p->p_flags & P_SYSTEM)
 215                 return(0);
 216
 217         FOREACH_LWP_IN_PROC(lp, p) {
 218                 switch (lp->lwp_stat) {
 219                 case LSSTOP:
 220                 case LSSLEEP:
 221                         if ((p->p_flags & P_SWAPPEDOUT) == 0) {
 222                                 if ((lp->lwp_flags & LWP_SINTR) == 0)
 223                                         totalp->t_dw++;
 224                                 else if (lp->lwp_slptime < maxslp)
 225                                         totalp->t_sl++;
 226                         } else if (lp->lwp_slptime < maxslp) {
 227                                 totalp->t_sw++;
 228                         }
 229                         if (lp->lwp_slptime >= maxslp)
 230                                 return(0);
 231                         break;
 232
 233                 case LSRUN:
 234                         if (p->p_flags & P_SWAPPEDOUT)
 235                                 totalp->t_sw++;
 236                         else
 237                                 totalp->t_rq++;
 238                         if (p->p_stat == SIDL)
 239                                 return(0);
 240                         break;
 241
 242                 default:
 243                         return (0);
 244                 }
 245
 246                 /*
 247                  * Set while in vm_fault()
 248                  */
 249                 if (lp->lwp_flags & LWP_PAGING)
 250                         totalp->t_pw++;
 251         }
 252         return(0);
 253 }
 254
 255 /*
 256  * No requirements.
 257  */
 258 static int
 259 do_vmstats(SYSCTL_HANDLER_ARGS)
 260 {
 261         struct vmstats vms = vmstats;
 262         return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
 263 }
 264
 265 /*
 266  * No requirements.
 267  */
 268 static int
 269 do_vmmeter(SYSCTL_HANDLER_ARGS)
 270 {
 271         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 272         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 273         struct vmmeter vmm;
 274         int i;
 275
 276         bzero(&vmm, sizeof(vmm));
 277         for (i = 0; i < ncpus; ++i) {
 278                 int off;
 279                 struct globaldata *gd = globaldata_find(i);
 280
 281                 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 282                         *(u_int *)((char *)&vmm + off) +=
 283                                 *(u_int *)((char *)&gd->gd_cnt + off);
 284                 }
 285
 286         }
 287         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
 288         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 289 }
 290
 291 /*
 292  * vcnt() -     accumulate statistics from the cnt structure for each cpu
 293  *
 294  *      The vmmeter structure is now per-cpu as well as global.  Those
 295  *      statistics which can be kept on a per-cpu basis (to avoid cache
 296  *      stalls between cpus) can be moved to the per-cpu vmmeter.  Remaining
 297  *      statistics, such as v_free_reserved, are left in the global
 298  *      structure.
 299  *
 300  * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
 301  *
 302  * No requirements.
 303  */
 304 static int
 305 vcnt(SYSCTL_HANDLER_ARGS)
 306 {
 307         int i;
 308         int count = 0;
 309         int offset = arg2;
 310
 311         for (i = 0; i < ncpus; ++i) {
 312                 struct globaldata *gd = globaldata_find(i);
 313                 count += *(int *)((char *)&gd->gd_cnt + offset);
 314         }
 315         return(SYSCTL_OUT(req, &count, sizeof(int)));
 316 }
 317
 318 /*
 319  * No requirements.
 320  */
 321 static int
 322 vcnt_intr(SYSCTL_HANDLER_ARGS)
 323 {
 324         int i;
 325         int count = 0;
 326
 327         for (i = 0; i < ncpus; ++i) {
 328                 struct globaldata *gd = globaldata_find(i);
 329
 330                 count += gd->gd_cnt.v_intr + gd->gd_cnt.v_ipi +
 331                          gd->gd_cnt.v_timer;
 332         }
 333         return(SYSCTL_OUT(req, &count, sizeof(int)));
 334 }
 335
 336 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
 337
 338 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
 339     0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
 340     "System virtual memory aggregate");
 341 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
 342     0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
 343     "System virtual memory statistics");
 344 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
 345     0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
 346     "System statistics");
 347 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
 348 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
 349 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
 350 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
 351
 352 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
 353         0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
 354 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
 355         0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "Intransit map collisions (total)");
 356 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
 357         0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "Intransit map collisions which blocked");
 358 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
 359         0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "Forwarded interrupts due to MP lock");
 360 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
 361         0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "Forwarded hits due to MP lock");
 362 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
 363         0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "Forwarded misses due to MP lock");
 364 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
 365         0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
 366 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
 367         0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
 368 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
 369         0, VMMETEROFF(v_intr), vcnt_intr, "IU", "Hardware interrupts");
 370 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_ipi, CTLTYPE_UINT|CTLFLAG_RD,
 371         0, VMMETEROFF(v_ipi), vcnt, "IU", "Inter-processor interrupts");
 372 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_timer, CTLTYPE_UINT|CTLFLAG_RD,
 373         0, VMMETEROFF(v_timer), vcnt, "IU", "LAPIC timer interrupts");
 374 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
 375         0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
 376 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
 377         0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
 378 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
 379         0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
 380 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
 381         0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
 382 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
 383         0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
 384 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
 385         0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
 386 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
 387         0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
 388 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
 389         0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
 390 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
 391         0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
 392 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
 393         0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
 394 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
 395         0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
 396 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
 397         0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
 398 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
 399         0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
 400 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
 401         0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
 402 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
 403         0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
 404 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
 405         0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
 406 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 407         0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
 408 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ppwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 409         0, VMMETEROFF(v_ppwakeups), vcnt, "IU", "vm_wait wakeups");
 410 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
 411         0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
 412 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
 413         0, VMMETEROFF(v_dfree), vcnt, "IU", "Pages freed by daemon");
 414 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
 415         0, VMMETEROFF(v_pfree), vcnt, "IU", "Pages freed by exiting processes");
 416 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
 417         0, VMMETEROFF(v_tfree), vcnt, "IU", "Total pages freed");
 418 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
 419         0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
 420 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
 421         0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
 422 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
 423         0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
 424 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
 425         0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
 426 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
 427         0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
 428 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 429         0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
 430 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 431         0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
 432 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
 433         0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
 434
 435 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 436         v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0,
 437         "Page size in bytes");
 438 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 439         v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0,
 440         "Total number of pages in system");
 441 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 442         v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0,
 443         "Number of pages reserved for deadlock");
 444 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 445         v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0,
 446         "Number of pages desired free");
 447 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 448         v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0,
 449         "Minimum number of pages desired free");
 450 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 451         v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0,
 452         "Number of pages free");
 453 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 454         v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0,
 455         "Number of pages wired down");
 456 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 457         v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0,
 458         "Number of pages active");
 459 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 460         v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0,
 461         "Number of pages desired inactive");
 462 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 463         v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0,
 464         "Number of pages inactive");
 465 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 466         v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0,
 467         "Number of pages on buffer cache queue");
 468 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 469         v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0,
 470         "Min number of pages desired on cache queue");
 471 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 472         v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0,
 473         "Max number of pages in cached obj");
 474 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 475         v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0,
 476         "Min number pages reserved for kernel");
 477 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 478         v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0,
 479         "Reserved number of pages for int code");
 480 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 481         zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0,
 482         "Number of zeroing pages");
 483
 484 /*
 485  * No requirements.
 486  */
 487 static int
 488 do_vmmeter_pcpu(SYSCTL_HANDLER_ARGS)
 489 {
 490         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 491         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 492         struct globaldata *gd = arg1;
 493         struct vmmeter vmm;
 494         int off;
 495
 496         bzero(&vmm, sizeof(vmm));
 497         for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 498                 *(u_int *)((char *)&vmm + off) +=
 499                         *(u_int *)((char *)&gd->gd_cnt + off);
 500         }
 501         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
 502         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 503 }
 504
 505 /*
 506  * Called from the low level boot code only.
 507  */
 508 static void
 509 vmmeter_init(void *dummy __unused)
 510 {
 511         int i;
 512
 513         for (i = 0; i < ncpus; ++i) {
 514                 struct sysctl_ctx_list *ctx;
 515                 struct sysctl_oid *oid;
 516                 struct globaldata *gd;
 517                 char name[32];
 518
 519                 ksnprintf(name, sizeof(name), "cpu%d", i);
 520
 521                 ctx = kmalloc(sizeof(*ctx), M_TEMP, M_WAITOK);
 522                 sysctl_ctx_init(ctx);
 523                 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_vm),
 524                                       OID_AUTO, name, CTLFLAG_RD, 0, "");
 525
 526                 gd = globaldata_find(i);
 527                 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
 528                                 "vmmeter", CTLTYPE_OPAQUE|CTLFLAG_RD,
 529                                 gd, sizeof(struct vmmeter), do_vmmeter_pcpu,
 530                                 "S,vmmeter", "System per-cpu statistics");
 531         }
 532 }
 533 SYSINIT(vmmeter, SI_SUB_PSEUDO, SI_ORDER_ANY, vmmeter_init, 0);