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 #include <sys/kcollect.h>
  43
  44 #include <vm/vm.h>
  45 #include <vm/vm_page.h>
  46 #include <vm/vm_extern.h>
  47 #include <vm/vm_param.h>
  48 #include <sys/lock.h>
  49 #include <vm/pmap.h>
  50 #include <vm/vm_map.h>
  51 #include <vm/vm_object.h>
  52 #include <sys/sysctl.h>
  53
  54 /*
  55  * WARNING: vmstats represents the final say, but individual cpu's may
  56  *          accumulative adjustments in gd->gd_vmstats_adj.  These are
  57  *          synchronized to the global vmstats in hardclock.
  58  *
  59  *          In addition, most individual cpus check vmstats using a local
  60  *          copy of the global vmstats in gd->gd_vmstats.  Hardclock also
  61  *          sychronizes the copy.  The pageout code and vm_page_alloc will
  62  *          also synchronize their local copies as necessary.
  63  *
  64  *          Other consumers should not expect perfect values.
  65  */
  66 __cachealign struct vmstats vmstats;
  67
  68 static int maxslp = MAXSLP;
  69
  70 SYSCTL_ULONG(_vm, VM_V_FREE_MIN, v_free_min,
  71         CTLFLAG_RW, &vmstats.v_free_min, 0,
  72         "Minimum number of pages desired free");
  73 SYSCTL_ULONG(_vm, VM_V_FREE_TARGET, v_free_target,
  74         CTLFLAG_RW, &vmstats.v_free_target, 0,
  75         "Number of pages desired free");
  76 SYSCTL_ULONG(_vm, VM_V_FREE_RESERVED, v_free_reserved,
  77         CTLFLAG_RW, &vmstats.v_free_reserved, 0,
  78         "Number of pages reserved for deadlock");
  79 SYSCTL_ULONG(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
  80         CTLFLAG_RW, &vmstats.v_inactive_target, 0,
  81         "Number of pages desired inactive");
  82 SYSCTL_ULONG(_vm, VM_V_CACHE_MIN, v_cache_min,
  83         CTLFLAG_RW, &vmstats.v_cache_min, 0,
  84         "Min number of pages desired on cache queue");
  85 SYSCTL_ULONG(_vm, VM_V_CACHE_MAX, v_cache_max,
  86         CTLFLAG_RW, &vmstats.v_cache_max, 0,
  87         "Max number of pages in cached obj");
  88 SYSCTL_ULONG(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
  89         CTLFLAG_RW, &vmstats.v_pageout_free_min, 0,
  90         "Min number pages reserved for kernel");
  91 SYSCTL_ULONG(_vm, OID_AUTO, v_free_severe,
  92         CTLFLAG_RW, &vmstats.v_free_severe, 0, "");
  93
  94 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg,
  95         CTLFLAG_RD | CTLFLAG_NOLOCK,
  96         &averunnable, loadavg, "Machine loadaverage history");
  97
  98 static int do_vmtotal_callback(struct proc *p, void *data);
  99
 100 /*
 101  * No requirements.
 102  */
 103 static int
 104 do_vmtotal(SYSCTL_HANDLER_ARGS)
 105 {
 106         struct vmtotal total;
 107         globaldata_t gd;
 108         int n;
 109
 110         bzero(&total, sizeof(total));
 111         for (n = 0; n < ncpus; ++n) {
 112                 gd = globaldata_find(n);
 113
 114                 /* total.t_rq calculated separately */
 115                 /* total.t_dw calculated separately */
 116                 /* total.t_pw calculated separately */
 117                 /* total.t_sl calculated separately */
 118                 /* total.t_sw calculated separately */
 119                 total.t_vm += gd->gd_vmtotal.t_vm;
 120                 total.t_avm += gd->gd_vmtotal.t_avm;
 121                 total.t_rm += gd->gd_vmtotal.t_rm;
 122                 total.t_arm += gd->gd_vmtotal.t_arm;
 123                 total.t_vmshr += gd->gd_vmtotal.t_vmshr;
 124                 total.t_avmshr += gd->gd_vmtotal.t_avmshr;
 125                 total.t_rmshr += gd->gd_vmtotal.t_rmshr;
 126                 total.t_armshr += gd->gd_vmtotal.t_armshr;
 127                 /* total.t_free calculated separately */
 128         }
 129
 130         /*
 131          * Calculate process statistics.
 132          */
 133         allproc_scan(do_vmtotal_callback, &total, 0);
 134
 135         /*
 136          * Adjust for sysctl return.  Add real memory into virtual memory.
 137          * Set t_free.
 138          *
 139          * t_rm - Real memory
 140          * t_vm - Virtual memory (real + swap)
 141          */
 142         total.t_vm += total.t_rm;
 143         total.t_free = vmstats.v_free_count + vmstats.v_cache_count;
 144
 145         return (sysctl_handle_opaque(oidp, &total, sizeof(total), req));
 146 }
 147
 148 static int
 149 do_vmtotal_callback(struct proc *p, void *data)
 150 {
 151         struct vmtotal *totalp = data;
 152         struct lwp *lp;
 153
 154         if (p->p_flags & P_SYSTEM)
 155                 return(0);
 156
 157         lwkt_gettoken_shared(&p->p_token);
 158
 159         FOREACH_LWP_IN_PROC(lp, p) {
 160                 switch (lp->lwp_stat) {
 161                 case LSSTOP:
 162                 case LSSLEEP:
 163                         if ((p->p_flags & P_SWAPPEDOUT) == 0) {
 164                                 if ((lp->lwp_flags & LWP_SINTR) == 0)
 165                                         totalp->t_dw++;
 166                                 else if (lp->lwp_slptime < maxslp)
 167                                         totalp->t_sl++;
 168                         } else if (lp->lwp_slptime < maxslp) {
 169                                 totalp->t_sw++;
 170                         }
 171                         if (lp->lwp_slptime >= maxslp)
 172                                 goto out;
 173                         break;
 174
 175                 case LSRUN:
 176                         if (p->p_flags & P_SWAPPEDOUT)
 177                                 totalp->t_sw++;
 178                         else
 179                                 totalp->t_rq++;
 180                         if (p->p_stat == SIDL)
 181                                 goto out;
 182                         break;
 183
 184                 default:
 185                         goto out;
 186                 }
 187
 188                 /*
 189                  * Set while in vm_fault()
 190                  */
 191                 if (lp->lwp_flags & LWP_PAGING)
 192                         totalp->t_pw++;
 193         }
 194 out:
 195         lwkt_reltoken(&p->p_token);
 196         return(0);
 197 }
 198
 199 /*
 200  * No requirements.
 201  */
 202 static int
 203 do_vmstats(SYSCTL_HANDLER_ARGS)
 204 {
 205         struct vmstats vms = vmstats;
 206         return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
 207 }
 208
 209 /*
 210  * No requirements.
 211  */
 212 static int
 213 do_vmmeter(SYSCTL_HANDLER_ARGS)
 214 {
 215         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 216         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 217         struct vmmeter vmm;
 218         int i;
 219
 220         bzero(&vmm, sizeof(vmm));
 221         for (i = 0; i < ncpus; ++i) {
 222                 int off;
 223                 struct globaldata *gd = globaldata_find(i);
 224
 225                 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 226                         *(u_int *)((char *)&vmm + off) +=
 227                                 *(u_int *)((char *)&gd->gd_cnt + off);
 228                 }
 229
 230         }
 231         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
 232         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 233 }
 234
 235 /*
 236  * vcnt() -     accumulate statistics from the cnt structure for each cpu
 237  *
 238  *      The vmmeter structure is now per-cpu as well as global.  Those
 239  *      statistics which can be kept on a per-cpu basis (to avoid cache
 240  *      stalls between cpus) can be moved to the per-cpu vmmeter.  Remaining
 241  *      statistics, such as v_free_reserved, are left in the global
 242  *      structure.
 243  *
 244  * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
 245  *
 246  * No requirements.
 247  */
 248 static int
 249 vcnt(SYSCTL_HANDLER_ARGS)
 250 {
 251         int i;
 252         int count = 0;
 253         int offset = arg2;
 254
 255         for (i = 0; i < ncpus; ++i) {
 256                 struct globaldata *gd = globaldata_find(i);
 257                 count += *(int *)((char *)&gd->gd_cnt + offset);
 258         }
 259         return(SYSCTL_OUT(req, &count, sizeof(int)));
 260 }
 261
 262 /*
 263  * No requirements.
 264  */
 265 static int
 266 vcnt_intr(SYSCTL_HANDLER_ARGS)
 267 {
 268         int i;
 269         int count = 0;
 270
 271         for (i = 0; i < ncpus; ++i) {
 272                 struct globaldata *gd = globaldata_find(i);
 273
 274                 count += gd->gd_cnt.v_intr + gd->gd_cnt.v_ipi +
 275                          gd->gd_cnt.v_timer;
 276         }
 277         return(SYSCTL_OUT(req, &count, sizeof(int)));
 278 }
 279
 280 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
 281
 282 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
 283     0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
 284     "System virtual memory aggregate");
 285 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
 286     0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
 287     "System virtual memory statistics");
 288 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
 289     0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
 290     "System statistics");
 291 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
 292 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
 293 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
 294 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
 295
 296 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
 297         0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
 298 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
 299         0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "Intransit map collisions (total)");
 300 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
 301         0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "Intransit map collisions which blocked");
 302 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
 303         0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "Forwarded interrupts due to MP lock");
 304 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
 305         0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "Forwarded hits due to MP lock");
 306 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
 307         0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "Forwarded misses due to MP lock");
 308 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
 309         0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
 310 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
 311         0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
 312 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
 313         0, VMMETEROFF(v_intr), vcnt_intr, "IU", "Hardware interrupts");
 314 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_ipi, CTLTYPE_UINT|CTLFLAG_RD,
 315         0, VMMETEROFF(v_ipi), vcnt, "IU", "Inter-processor interrupts");
 316 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_timer, CTLTYPE_UINT|CTLFLAG_RD,
 317         0, VMMETEROFF(v_timer), vcnt, "IU", "LAPIC timer interrupts");
 318 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
 319         0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
 320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
 321         0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
 322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
 323         0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
 324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
 325         0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
 326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
 327         0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
 328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
 329         0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
 330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
 331         0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
 332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
 333         0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
 334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
 335         0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
 336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
 337         0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
 338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
 339         0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
 340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
 341         0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
 342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
 343         0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
 344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
 345         0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
 346 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
 347         0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
 348 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
 349         0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
 350 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 351         0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
 352 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ppwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 353         0, VMMETEROFF(v_ppwakeups), vcnt, "IU", "vm_wait wakeups");
 354 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
 355         0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
 356 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
 357         0, VMMETEROFF(v_dfree), vcnt, "IU", "Pages freed by daemon");
 358 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
 359         0, VMMETEROFF(v_pfree), vcnt, "IU", "Pages freed by exiting processes");
 360 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
 361         0, VMMETEROFF(v_tfree), vcnt, "IU", "Total pages freed");
 362 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
 363         0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
 364 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
 365         0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
 366 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
 367         0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
 368 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
 369         0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
 370 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
 371         0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
 372 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 373         0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
 374 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 375         0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
 376 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
 377         0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
 378
 379 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 380         v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0,
 381         "Page size in bytes");
 382 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 383         v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0,
 384         "Total number of pages in system");
 385 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 386         v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0,
 387         "Number of pages reserved for deadlock");
 388 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 389         v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0,
 390         "Number of pages desired free");
 391 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 392         v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0,
 393         "Minimum number of pages desired free");
 394 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 395         v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0,
 396         "Number of pages free");
 397 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 398         v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0,
 399         "Number of pages wired down");
 400 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 401         v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0,
 402         "Number of pages active");
 403 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 404         v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0,
 405         "Number of pages desired inactive");
 406 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 407         v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0,
 408         "Number of pages inactive");
 409 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 410         v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0,
 411         "Number of pages on buffer cache queue");
 412 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 413         v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0,
 414         "Min number of pages desired on cache queue");
 415 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 416         v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0,
 417         "Max number of pages in cached obj");
 418 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 419         v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0,
 420         "Min number pages reserved for kernel");
 421 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO,
 422         v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0,
 423         "Reserved number of pages for int code");
 424
 425 /*
 426  * No requirements.
 427  */
 428 static int
 429 do_vmmeter_pcpu(SYSCTL_HANDLER_ARGS)
 430 {
 431         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 432         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 433         struct globaldata *gd = arg1;
 434         struct vmmeter vmm;
 435         int off;
 436
 437         bzero(&vmm, sizeof(vmm));
 438         for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 439                 *(u_int *)((char *)&vmm + off) +=
 440                         *(u_int *)((char *)&gd->gd_cnt + off);
 441         }
 442         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
 443         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 444 }
 445
 446 /*
 447  * Callback for long-term slow data collection on 10-second interval.
 448  *
 449  * Return faults, set data for other entries.
 450  */
 451 #define PTOB(value)     ((uint64_t)(value) << PAGE_SHIFT)
 452
 453 static uint64_t
 454 collect_vmstats_callback(int n)
 455 {
 456         static struct vmmeter last_vmm;
 457         struct vmmeter cur_vmm;
 458         const int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 459         const int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 460         uint64_t total;
 461
 462         /*
 463          * The hardclock already rolls up vmstats for us.
 464          */
 465         kcollect_setvalue(KCOLLECT_MEMFRE, PTOB(vmstats.v_free_count));
 466         kcollect_setvalue(KCOLLECT_MEMCAC, PTOB(vmstats.v_cache_count));
 467         kcollect_setvalue(KCOLLECT_MEMINA, PTOB(vmstats.v_inactive_count));
 468         kcollect_setvalue(KCOLLECT_MEMACT, PTOB(vmstats.v_active_count));
 469         kcollect_setvalue(KCOLLECT_MEMWIR, PTOB(vmstats.v_wire_count));
 470
 471         /*
 472          * Collect pcpu statistics for things like faults.
 473          */
 474         bzero(&cur_vmm, sizeof(cur_vmm));
 475         for (n = 0; n < ncpus; ++n) {
 476                 struct globaldata *gd = globaldata_find(n);
 477                 int off;
 478
 479                 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 480                         *(u_int *)((char *)&cur_vmm + off) +=
 481                                 *(u_int *)((char *)&gd->gd_cnt + off);
 482                 }
 483
 484         }
 485
 486         total = cur_vmm.v_cow_faults - last_vmm.v_cow_faults;
 487         last_vmm.v_cow_faults = cur_vmm.v_cow_faults;
 488         kcollect_setvalue(KCOLLECT_COWFAULT, total);
 489
 490         total = cur_vmm.v_zfod - last_vmm.v_zfod;
 491         last_vmm.v_zfod = cur_vmm.v_zfod;
 492         kcollect_setvalue(KCOLLECT_ZFILL, total);
 493
 494         total = cur_vmm.v_syscall - last_vmm.v_syscall;
 495         last_vmm.v_syscall = cur_vmm.v_syscall;
 496         kcollect_setvalue(KCOLLECT_SYSCALLS, total);
 497
 498         total = cur_vmm.v_intr - last_vmm.v_intr;
 499         last_vmm.v_intr = cur_vmm.v_intr;
 500         kcollect_setvalue(KCOLLECT_INTR, total);
 501
 502         total = cur_vmm.v_ipi - last_vmm.v_ipi;
 503         last_vmm.v_ipi = cur_vmm.v_ipi;
 504         kcollect_setvalue(KCOLLECT_IPI, total);
 505
 506         total = cur_vmm.v_timer - last_vmm.v_timer;
 507         last_vmm.v_timer = cur_vmm.v_timer;
 508         kcollect_setvalue(KCOLLECT_TIMER, total);
 509
 510         total = cur_vmm.v_vm_faults - last_vmm.v_vm_faults;
 511         last_vmm.v_vm_faults = cur_vmm.v_vm_faults;
 512
 513         return total;
 514 }
 515
 516 /*
 517  * Called from the low level boot code only.
 518  */
 519 static void
 520 vmmeter_init(void *dummy __unused)
 521 {
 522         int i;
 523
 524         for (i = 0; i < ncpus; ++i) {
 525                 struct sysctl_ctx_list *ctx;
 526                 struct sysctl_oid *oid;
 527                 struct globaldata *gd;
 528                 char name[32];
 529
 530                 ksnprintf(name, sizeof(name), "cpu%d", i);
 531
 532                 ctx = kmalloc(sizeof(*ctx), M_TEMP, M_WAITOK);
 533                 sysctl_ctx_init(ctx);
 534                 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_vm),
 535                                       OID_AUTO, name, CTLFLAG_RD, 0, "");
 536
 537                 gd = globaldata_find(i);
 538                 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
 539                                 "vmmeter", CTLTYPE_OPAQUE|CTLFLAG_RD,
 540                                 gd, sizeof(struct vmmeter), do_vmmeter_pcpu,
 541                                 "S,vmmeter", "System per-cpu statistics");
 542         }
 543         kcollect_register(KCOLLECT_VMFAULT, "fault", collect_vmstats_callback,
 544                           KCOLLECT_SCALE(KCOLLECT_VMFAULT_FORMAT, 0));
 545         kcollect_register(KCOLLECT_COWFAULT, "cow", NULL,
 546                           KCOLLECT_SCALE(KCOLLECT_COWFAULT_FORMAT, 0));
 547         kcollect_register(KCOLLECT_ZFILL, "zfill", NULL,
 548                           KCOLLECT_SCALE(KCOLLECT_ZFILL_FORMAT, 0));
 549
 550         kcollect_register(KCOLLECT_MEMFRE, "free", NULL,
 551                           KCOLLECT_SCALE(KCOLLECT_MEMFRE_FORMAT,
 552                                          PTOB(vmstats.v_page_count)));
 553         kcollect_register(KCOLLECT_MEMCAC, "cache", NULL,
 554                           KCOLLECT_SCALE(KCOLLECT_MEMCAC_FORMAT,
 555                                          PTOB(vmstats.v_page_count)));
 556         kcollect_register(KCOLLECT_MEMINA, "inact", NULL,
 557                           KCOLLECT_SCALE(KCOLLECT_MEMINA_FORMAT,
 558                                          PTOB(vmstats.v_page_count)));
 559         kcollect_register(KCOLLECT_MEMACT, "act", NULL,
 560                           KCOLLECT_SCALE(KCOLLECT_MEMACT_FORMAT,
 561                                          PTOB(vmstats.v_page_count)));
 562         kcollect_register(KCOLLECT_MEMWIR, "wired", NULL,
 563                           KCOLLECT_SCALE(KCOLLECT_MEMWIR_FORMAT,
 564                                          PTOB(vmstats.v_page_count)));
 565
 566         kcollect_register(KCOLLECT_SYSCALLS, "syscalls", NULL,
 567                           KCOLLECT_SCALE(KCOLLECT_SYSCALLS_FORMAT, 0));
 568
 569         kcollect_register(KCOLLECT_INTR, "intr", NULL,
 570                           KCOLLECT_SCALE(KCOLLECT_INTR_FORMAT, 0));
 571         kcollect_register(KCOLLECT_IPI, "ipi", NULL,
 572                           KCOLLECT_SCALE(KCOLLECT_IPI_FORMAT, 0));
 573         kcollect_register(KCOLLECT_TIMER, "timer", NULL,
 574                           KCOLLECT_SCALE(KCOLLECT_TIMER_FORMAT, 0));
 575 }
 576 SYSINIT(vmmeter, SI_SUB_PSEUDO, SI_ORDER_ANY, vmmeter_init, 0);
 577
 578 /*
 579  * Rolls up accumulated pcpu adjustments to vmstats counts into the global
 580  * structure, copy the global structure into our pcpu structure.  Critical
 581  * path checks will use our pcpu structure.
 582  *
 583  * This is somewhat expensive and only called when needed, and by the
 584  * hardclock.
 585  */
 586 void
 587 vmstats_rollup(void)
 588 {
 589         int cpu;
 590
 591         for (cpu = 0; cpu < ncpus; ++cpu) {
 592                 vmstats_rollup_cpu(globaldata_find(cpu));
 593         }
 594         mycpu->gd_vmstats = vmstats;
 595 }
 596
 597 void
 598 vmstats_rollup_cpu(globaldata_t gd)
 599 {
 600         long value;
 601
 602         if (gd->gd_vmstats_adj.v_free_count) {
 603                 value = atomic_swap_long(&gd->gd_vmstats_adj.v_free_count, 0);
 604                 atomic_add_long(&vmstats.v_free_count, value);
 605         }
 606         if (gd->gd_vmstats_adj.v_cache_count) {
 607                 value = atomic_swap_long(&gd->gd_vmstats_adj.v_cache_count, 0);
 608                 atomic_add_long(&vmstats.v_cache_count, value);
 609         }
 610         if (gd->gd_vmstats_adj.v_inactive_count) {
 611                 value=atomic_swap_long(&gd->gd_vmstats_adj.v_inactive_count, 0);
 612                 atomic_add_long(&vmstats.v_inactive_count, value);
 613         }
 614         if (gd->gd_vmstats_adj.v_active_count) {
 615                 value = atomic_swap_long(&gd->gd_vmstats_adj.v_active_count, 0);
 616                 atomic_add_long(&vmstats.v_active_count, value);
 617         }
 618         if (gd->gd_vmstats_adj.v_wire_count) {
 619                 value = atomic_swap_long(&gd->gd_vmstats_adj.v_wire_count, 0);
 620                 atomic_add_long(&vmstats.v_wire_count, value);
 621         }
 622 }