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