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