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  * $FreeBSD$
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/lock.h>
  41 #include <sys/mutex.h>
  42 #include <sys/proc.h>
  43 #include <sys/resource.h>
  44 #include <sys/sx.h>
  45 #include <sys/vmmeter.h>
  46 #include <sys/smp.h>
  47
  48 #include <vm/vm.h>
  49 #include <vm/vm_page.h>
  50 #include <vm/vm_extern.h>
  51 #include <vm/vm_param.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 vmmeter cnt;
  58
  59 int maxslp = MAXSLP;
  60
  61 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
  62         CTLFLAG_RW, &cnt.v_free_min, 0, "");
  63 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
  64         CTLFLAG_RW, &cnt.v_free_target, 0, "");
  65 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
  66         CTLFLAG_RW, &cnt.v_free_reserved, 0, "");
  67 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
  68         CTLFLAG_RW, &cnt.v_inactive_target, 0, "");
  69 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
  70         CTLFLAG_RW, &cnt.v_cache_min, 0, "");
  71 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
  72         CTLFLAG_RW, &cnt.v_cache_max, 0, "");
  73 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
  74         CTLFLAG_RW, &cnt.v_pageout_free_min, 0, "");
  75 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
  76         CTLFLAG_RW, &cnt.v_free_severe, 0, "");
  77
  78 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
  79     &averunnable, loadavg, "Machine loadaverage history");
  80
  81 static int
  82 vmtotal(SYSCTL_HANDLER_ARGS)
  83 {
  84         struct proc *p;
  85         struct vmtotal total, *totalp;
  86         vm_map_entry_t entry;
  87         vm_object_t object;
  88         vm_map_t map;
  89         int paging;
  90         struct ksegrp *kg;
  91
  92         totalp = &total;
  93         bzero(totalp, sizeof *totalp);
  94         /*
  95          * Mark all objects as inactive.
  96          */
  97         GIANT_REQUIRED;
  98         mtx_lock(&vm_object_list_mtx);
  99         TAILQ_FOREACH(object, &vm_object_list, object_list)
 100                 vm_object_clear_flag(object, OBJ_ACTIVE);
 101         mtx_unlock(&vm_object_list_mtx);
 102         /*
 103          * Calculate process statistics.
 104          */
 105         sx_slock(&allproc_lock);
 106         FOREACH_PROC_IN_SYSTEM(p) {
 107                 if (p->p_flag & P_SYSTEM)
 108                         continue;
 109                 mtx_lock_spin(&sched_lock);
 110                 switch (p->p_stat) {
 111                 case 0:
 112                         mtx_unlock_spin(&sched_lock);
 113                         continue;
 114
 115                 case SMTX:
 116                 case SSLEEP:
 117                 case SSTOP:
 118                         kg = &p->p_ksegrp;      /* XXXKSE */
 119                         if (p->p_sflag & PS_INMEM) {
 120                                 if (FIRST_THREAD_IN_PROC(p)->td_priority
 121                                     <= PZERO)
 122                                         totalp->t_dw++;
 123                                 else if (kg->kg_slptime < maxslp)
 124                                         totalp->t_sl++;
 125                         } else if (kg->kg_slptime < maxslp)
 126                                 totalp->t_sw++;
 127                         if (kg->kg_slptime >= maxslp) {
 128                                 mtx_unlock_spin(&sched_lock);
 129                                 continue;
 130                         }
 131                         break;
 132
 133                 case SWAIT:
 134                         totalp->t_sl++;
 135                         continue;
 136
 137                 case SRUN:
 138                 case SIDL:
 139                         if (p->p_sflag & PS_INMEM)
 140                                 totalp->t_rq++;
 141                         else
 142                                 totalp->t_sw++;
 143                         if (p->p_stat == SIDL) {
 144                                 mtx_unlock_spin(&sched_lock);
 145                                 continue;
 146                         }
 147                         break;
 148                 }
 149                 mtx_unlock_spin(&sched_lock);
 150                 /*
 151                  * Note active objects.
 152                  */
 153                 paging = 0;
 154                 for (map = &p->p_vmspace->vm_map, entry = map->header.next;
 155                     entry != &map->header; entry = entry->next) {
 156                         if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
 157                             entry->object.vm_object == NULL)
 158                                 continue;
 159                         vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
 160                         paging |= entry->object.vm_object->paging_in_progress;
 161                 }
 162                 if (paging)
 163                         totalp->t_pw++;
 164         }
 165         sx_sunlock(&allproc_lock);
 166         /*
 167          * Calculate object memory usage statistics.
 168          */
 169         mtx_lock(&vm_object_list_mtx);
 170         TAILQ_FOREACH(object, &vm_object_list, object_list) {
 171                 /*
 172                  * devices, like /dev/mem, will badly skew our totals
 173                  */
 174                 if (object->type == OBJT_DEVICE)
 175                         continue;
 176                 totalp->t_vm += object->size;
 177                 totalp->t_rm += object->resident_page_count;
 178                 if (object->flags & OBJ_ACTIVE) {
 179                         totalp->t_avm += object->size;
 180                         totalp->t_arm += object->resident_page_count;
 181                 }
 182                 if (object->shadow_count > 1) {
 183                         /* shared object */
 184                         totalp->t_vmshr += object->size;
 185                         totalp->t_rmshr += object->resident_page_count;
 186                         if (object->flags & OBJ_ACTIVE) {
 187                                 totalp->t_avmshr += object->size;
 188                                 totalp->t_armshr += object->resident_page_count;
 189                         }
 190                 }
 191         }
 192         mtx_unlock(&vm_object_list_mtx);
 193         totalp->t_free = cnt.v_free_count + cnt.v_cache_count;
 194         return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
 195 }
 196
 197 /*
 198  * vcnt() -     accumulate statistics from all cpus and the global cnt
 199  *              structure.
 200  *
 201  *      The vmmeter structure is now per-cpu as well as global.  Those
 202  *      statistics which can be kept on a per-cpu basis (to avoid cache
 203  *      stalls between cpus) can be moved to the per-cpu vmmeter.  Remaining
 204  *      statistics, such as v_free_reserved, are left in the global
 205  *      structure.
 206  *
 207  * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
 208  */
 209 static int
 210 vcnt(SYSCTL_HANDLER_ARGS)
 211 {
 212         int error = 0;
 213         int count = *(int *)arg1;
 214 #ifdef SMP
 215         int i;
 216         int offset = (char *)arg1 - (char *)&cnt;
 217
 218         for (i = 0; i < mp_ncpus; ++i) {
 219                 struct pcpu *pcpu = pcpu_find(i);
 220                 count += *(int *)((char *)&pcpu->pc_cnt + offset);
 221         }
 222 #endif
 223         error = SYSCTL_OUT(req, &count, sizeof(int));
 224         return(error);
 225 }
 226
 227 SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
 228     0, sizeof(struct vmtotal), vmtotal, "S,vmtotal",
 229     "System virtual memory statistics");
 230 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
 231 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
 232 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
 233 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
 234
 235 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
 236         &cnt.v_swtch, 0, vcnt, "IU", "Context switches");
 237 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
 238         &cnt.v_trap, 0, vcnt, "IU", "Traps");
 239 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
 240         &cnt.v_syscall, 0, vcnt, "IU", "Syscalls");
 241 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
 242         &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts");
 243 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
 244         &cnt.v_soft, 0, vcnt, "IU", "Software interrupts");
 245 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
 246         &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults");
 247 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
 248         &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults");
 249 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
 250         &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults");
 251 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
 252         &cnt.v_zfod, 0, vcnt, "IU", "Zero fill");
 253 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
 254         &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill");
 255 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
 256         &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations");
 257 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
 258         &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations");
 259 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
 260         &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages");
 261 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
 262         &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages");
 263 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
 264         &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations");
 265 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
 266         &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations");
 267 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
 268         &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages");
 269 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
 270         &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages");
 271 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
 272         &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking");
 273 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
 274         &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages");
 275 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
 276         &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups");
 277 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
 278         &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans");
 279 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
 280         &cnt.v_dfree, 0, vcnt, "IU", "");
 281 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
 282         &cnt.v_pfree, 0, vcnt, "IU", "");
 283 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
 284         &cnt.v_tfree, 0, vcnt, "IU", "");
 285 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD,
 286         &cnt.v_page_size, 0, vcnt, "IU", "");
 287 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD,
 288         &cnt.v_page_count, 0, vcnt, "IU", "");
 289 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD,
 290         &cnt.v_free_reserved, 0, vcnt, "IU", "");
 291 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD,
 292         &cnt.v_free_target, 0, vcnt, "IU", "");
 293 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD,
 294         &cnt.v_free_min, 0, vcnt, "IU", "");
 295 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD,
 296         &cnt.v_free_count, 0, vcnt, "IU", "");
 297 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD,
 298         &cnt.v_wire_count, 0, vcnt, "IU", "");
 299 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD,
 300         &cnt.v_active_count, 0, vcnt, "IU", "");
 301 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD,
 302         &cnt.v_inactive_target, 0, vcnt, "IU", "");
 303 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD,
 304         &cnt.v_inactive_count, 0, vcnt, "IU", "");
 305 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD,
 306         &cnt.v_cache_count, 0, vcnt, "IU", "");
 307 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD,
 308         &cnt.v_cache_min, 0, vcnt, "IU", "");
 309 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD,
 310         &cnt.v_cache_max, 0, vcnt, "IU", "");
 311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD,
 312         &cnt.v_pageout_free_min, 0, vcnt, "IU", "");
 313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD,
 314         &cnt.v_interrupt_free_min, 0, vcnt, "IU", "");
 315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
 316         &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls");
 317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
 318         &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls");
 319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
 320         &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls");
 321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
 322         &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel");
 323 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
 324         &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()");
 325 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 326         &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()");
 327 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
 328         &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()");
 329 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
 330         &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel");
 331
 332 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 333         zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");
 334 #if 0
 335 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 336         page_mask, CTLFLAG_RD, &page_mask, 0, "");
 337 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 338         page_shift, CTLFLAG_RD, &page_shift, 0, "");
 339 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 340         first_page, CTLFLAG_RD, &first_page, 0, "");
 341 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 342         last_page, CTLFLAG_RD, &last_page, 0, "");
 343 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 344         vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, "");
 345 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
 346         vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, "");
 347 #endif