sys/vm/vm_meter.c

   1 /*
   2  * Copyright (c) 1982, 1986, 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)vm_meter.c  8.4 (Berkeley) 1/4/94
  34  * $FreeBSD: src/sys/vm/vm_meter.c,v 1.34.2.7 2002/10/10 19:28:22 dillon Exp $
  35  * $DragonFly: src/sys/vm/vm_meter.c,v 1.7 2003/07/19 21:14:53 dillon Exp $
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/proc.h>
  40 #include <sys/systm.h>
  41 #include <sys/kernel.h>
  42 #include <sys/resource.h>
  43 #include <sys/vmmeter.h>
  44
  45 #include <vm/vm.h>
  46 #include <vm/vm_page.h>
  47 #include <vm/vm_extern.h>
  48 #include <vm/vm_param.h>
  49 #include <sys/lock.h>
  50 #include <vm/pmap.h>
  51 #include <vm/vm_map.h>
  52 #include <vm/vm_object.h>
  53 #include <sys/sysctl.h>
  54
  55 struct vmstats vmstats;
  56
  57 static int maxslp = MAXSLP;
  58
  59 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
  60         CTLFLAG_RW, &vmstats.v_free_min, 0, "");
  61 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
  62         CTLFLAG_RW, &vmstats.v_free_target, 0, "");
  63 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
  64         CTLFLAG_RW, &vmstats.v_free_reserved, 0, "");
  65 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
  66         CTLFLAG_RW, &vmstats.v_inactive_target, 0, "");
  67 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
  68         CTLFLAG_RW, &vmstats.v_cache_min, 0, "");
  69 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
  70         CTLFLAG_RW, &vmstats.v_cache_max, 0, "");
  71 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
  72         CTLFLAG_RW, &vmstats.v_pageout_free_min, 0, "");
  73 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
  74         CTLFLAG_RW, &vmstats.v_free_severe, 0, "");
  75
  76 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
  77     &averunnable, loadavg, "Machine loadaverage history");
  78
  79 static int
  80 do_vmtotal(SYSCTL_HANDLER_ARGS)
  81 {
  82         struct proc *p;
  83         struct vmtotal total, *totalp;
  84         vm_map_entry_t entry;
  85         vm_object_t object;
  86         vm_map_t map;
  87         int paging;
  88
  89         totalp = &total;
  90         bzero(totalp, sizeof *totalp);
  91         /*
  92          * Mark all objects as inactive.
  93          */
  94         for (object = TAILQ_FIRST(&vm_object_list);
  95             object != NULL;
  96             object = TAILQ_NEXT(object,object_list))
  97                 vm_object_clear_flag(object, OBJ_ACTIVE);
  98         /*
  99          * Calculate process statistics.
 100          */
 101         for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
 102                 if (p->p_flag & P_SYSTEM)
 103                         continue;
 104                 switch (p->p_stat) {
 105                 case 0:
 106                         continue;
 107
 108                 case SSLEEP:
 109                 case SSTOP:
 110                         if (p->p_flag & P_INMEM) {
 111                                 if ((p->p_flag & P_SINTR) == 0)
 112                                         totalp->t_dw++;
 113                                 else if (p->p_slptime < maxslp)
 114                                         totalp->t_sl++;
 115                         } else if (p->p_slptime < maxslp)
 116                                 totalp->t_sw++;
 117                         if (p->p_slptime >= maxslp)
 118                                 continue;
 119                         break;
 120
 121                 case SRUN:
 122                 case SIDL:
 123                         if (p->p_flag & P_INMEM)
 124                                 totalp->t_rq++;
 125                         else
 126                                 totalp->t_sw++;
 127                         if (p->p_stat == SIDL)
 128                                 continue;
 129                         break;
 130                 }
 131                 /*
 132                  * Note active objects.
 133                  */
 134                 paging = 0;
 135                 for (map = &p->p_vmspace->vm_map, entry = map->header.next;
 136                     entry != &map->header; entry = entry->next) {
 137                         if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
 138                             entry->object.vm_object == NULL)
 139                                 continue;
 140                         vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
 141                         paging |= entry->object.vm_object->paging_in_progress;
 142                 }
 143                 if (paging)
 144                         totalp->t_pw++;
 145         }
 146         /*
 147          * Calculate object memory usage statistics.
 148          */
 149         for (object = TAILQ_FIRST(&vm_object_list);
 150             object != NULL;
 151             object = TAILQ_NEXT(object, object_list)) {
 152                 /*
 153                  * devices, like /dev/mem, will badly skew our totals
 154                  */
 155                 if (object->type == OBJT_DEVICE)
 156                         continue;
 157                 totalp->t_vm += object->size;
 158                 totalp->t_rm += object->resident_page_count;
 159                 if (object->flags & OBJ_ACTIVE) {
 160                         totalp->t_avm += object->size;
 161                         totalp->t_arm += object->resident_page_count;
 162                 }
 163                 if (object->shadow_count > 1) {
 164                         /* shared object */
 165                         totalp->t_vmshr += object->size;
 166                         totalp->t_rmshr += object->resident_page_count;
 167                         if (object->flags & OBJ_ACTIVE) {
 168                                 totalp->t_avmshr += object->size;
 169                                 totalp->t_armshr += object->resident_page_count;
 170                         }
 171                 }
 172         }
 173         totalp->t_free = vmstats.v_free_count + vmstats.v_cache_count;
 174         return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
 175 }
 176
 177 static int
 178 do_vmstats(SYSCTL_HANDLER_ARGS)
 179 {
 180         struct vmstats vms = vmstats;
 181         return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
 182 }
 183
 184 static int
 185 do_vmmeter(SYSCTL_HANDLER_ARGS)
 186 {
 187         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
 188         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
 189         struct vmmeter vmm;
 190         int i;
 191
 192         bzero(&vmm, sizeof(vmm));
 193         for (i = 0; i < ncpus; ++i) {
 194                 int off;
 195                 struct globaldata *gd = globaldata_find(i);
 196
 197                 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
 198                         *(u_int *)((char *)&vmm + off) +=
 199                                 *(u_int *)((char *)&gd->gd_cnt + off);
 200                 }
 201
 202         }
 203         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
 204 }
 205
 206 /*
 207  * vcnt() -     accumulate statistics from the cnt structure for each cpu
 208  *
 209  *      The vmmeter structure is now per-cpu as well as global.  Those
 210  *      statistics which can be kept on a per-cpu basis (to avoid cache
 211  *      stalls between cpus) can be moved to the per-cpu vmmeter.  Remaining
 212  *      statistics, such as v_free_reserved, are left in the global
 213  *      structure.
 214  *
 215  * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
 216  */
 217 static int
 218 vcnt(SYSCTL_HANDLER_ARGS)
 219 {
 220         int i;
 221         int count = 0;
 222         int offset = arg2;
 223
 224         for (i = 0; i < ncpus; ++i) {
 225                 struct globaldata *gd = globaldata_find(i);
 226                 count += *(int *)((char *)&gd->gd_cnt + offset);
 227         }
 228         return(SYSCTL_OUT(req, &count, sizeof(int)));
 229 }
 230
 231 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
 232
 233 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
 234     0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
 235     "System virtual memory aggregate");
 236 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
 237     0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
 238     "System virtual memory statistics");
 239 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
 240     0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
 241     "System per-cpu statistics");
 242 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
 243 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
 244 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
 245 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
 246
 247 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
 248         0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
 249 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
 250         0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "");
 251 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
 252         0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "");
 253 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
 254         0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "");
 255 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
 256         0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "");
 257 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
 258         0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "");
 259 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
 260         0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
 261 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
 262         0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
 263 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
 264         0, VMMETEROFF(v_intr), vcnt, "IU", "Hardware interrupts");
 265 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
 266         0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
 267 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
 268         0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
 269 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
 270         0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
 271 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
 272         0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
 273 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
 274         0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
 275 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
 276         0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
 277 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
 278         0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
 279 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
 280         0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
 281 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
 282         0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
 283 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
 284         0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
 285 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
 286         0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
 287 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
 288         0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
 289 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
 290         0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
 291 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
 292         0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
 293 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
 294         0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
 295 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
 296         0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
 297 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 298         0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
 299 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
 300         0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
 301 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
 302         0, VMMETEROFF(v_dfree), vcnt, "IU", "");
 303 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
 304         0, VMMETEROFF(v_pfree), vcnt, "IU", "");
 305 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
 306         0, VMMETEROFF(v_tfree), vcnt, "IU", "");
 307 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
 308         0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
 309 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
 310         0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
 311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
 312         0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
 313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
 314         0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
 315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
 316         0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
 317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 318         0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
 319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 320         0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
 321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
 322         0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
 323
 324 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 325         v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, "");
 326 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 327         v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, "");
 328 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 329         v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, "");
 330 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 331         v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, "");
 332 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 333         v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, "");
 334 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 335         v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, "");
 336 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 337         v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, "");
 338 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 339         v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, "");
 340 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 341         v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, "");
 342 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 343         v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, "");
 344 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 345         v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, "");
 346 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 347         v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, "");
 348 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 349         v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, "");
 350 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 351         v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, "");
 352 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
 353         v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, "");
 354 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 355         zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");