vm_meter.c revision 133807
157416Smarkm/* 257416Smarkm * Copyright (c) 1982, 1986, 1989, 1993 357416Smarkm * The Regents of the University of California. All rights reserved. 457416Smarkm * 557416Smarkm * Redistribution and use in source and binary forms, with or without 657416Smarkm * modification, are permitted provided that the following conditions 757416Smarkm * are met: 857416Smarkm * 1. Redistributions of source code must retain the above copyright 957416Smarkm * notice, this list of conditions and the following disclaimer. 1057416Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1157416Smarkm * notice, this list of conditions and the following disclaimer in the 1257416Smarkm * documentation and/or other materials provided with the distribution. 1357416Smarkm * 4. Neither the name of the University nor the names of its contributors 1457416Smarkm * may be used to endorse or promote products derived from this software 1557416Smarkm * without specific prior written permission. 1657416Smarkm * 1757416Smarkm * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 1857416Smarkm * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1957416Smarkm * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2057416Smarkm * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2157416Smarkm * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2257416Smarkm * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2357416Smarkm * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2457416Smarkm * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2557416Smarkm * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2657416Smarkm * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2757416Smarkm * SUCH DAMAGE. 2857416Smarkm * 2957416Smarkm * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 3057416Smarkm */ 3157416Smarkm 3257416Smarkm#include <sys/cdefs.h> 3357416Smarkm__FBSDID("$FreeBSD: head/sys/vm/vm_meter.c 133807 2004-08-16 06:16:12Z alc $"); 3457416Smarkm 3557416Smarkm#include <sys/param.h> 36233294Sstas#include <sys/systm.h> 3757416Smarkm#include <sys/kernel.h> 3857416Smarkm#include <sys/lock.h> 3957416Smarkm#include <sys/mutex.h> 4057416Smarkm#include <sys/proc.h> 4157416Smarkm#include <sys/resource.h> 4257416Smarkm#include <sys/sx.h> 4357416Smarkm#include <sys/vmmeter.h> 4457416Smarkm#include <sys/smp.h> 4557416Smarkm 4657416Smarkm#include <vm/vm.h> 4757416Smarkm#include <vm/vm_page.h> 4857416Smarkm#include <vm/vm_extern.h> 4957416Smarkm#include <vm/vm_param.h> 5057416Smarkm#include <vm/pmap.h> 5157416Smarkm#include <vm/vm_map.h> 5257416Smarkm#include <vm/vm_object.h> 5357416Smarkm#include <sys/sysctl.h> 5457416Smarkm 5557416Smarkm/* 5657416Smarkm * Virtual memory MPSAFE temporary workarounds. 5757416Smarkm */ 5857416Smarkmint debug_mpsafevm; 5957416SmarkmTUNABLE_INT("debug.mpsafevm", &debug_mpsafevm); 6057416SmarkmSYSCTL_INT(_debug, OID_AUTO, mpsafevm, CTLFLAG_RD, &debug_mpsafevm, 0, 6157416Smarkm "Enable/disable MPSAFE virtual memory support"); 6257416Smarkm 6357416Smarkmstruct vmmeter cnt; 6457416Smarkm 6557416Smarkmint maxslp = MAXSLP; 6657416Smarkm 6757416SmarkmSYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 6857416Smarkm CTLFLAG_RW, &cnt.v_free_min, 0, ""); 6957416SmarkmSYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 7057416Smarkm CTLFLAG_RW, &cnt.v_free_target, 0, ""); 7157416SmarkmSYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 7257416Smarkm CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 7357416SmarkmSYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 7457416Smarkm CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 7557416SmarkmSYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 7657416Smarkm CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 7757416SmarkmSYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 7857416Smarkm CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 7957416SmarkmSYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 8057416Smarkm CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 8157416SmarkmSYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 8257416Smarkm CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 8357416Smarkm 8457416SmarkmSYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 8557416Smarkm &averunnable, loadavg, "Machine loadaverage history"); 8657416Smarkm 8757416Smarkmstatic int 8857416Smarkmvmtotal(SYSCTL_HANDLER_ARGS) 8957416Smarkm{ 9057416Smarkm/* XXXKSE almost completely broken */ 9157416Smarkm struct proc *p; 9257416Smarkm struct vmtotal total, *totalp; 9357416Smarkm vm_map_entry_t entry; 9457416Smarkm vm_object_t object; 9557416Smarkm vm_map_t map; 9657416Smarkm int paging; 9757416Smarkm struct thread *td; 9857416Smarkm 9957416Smarkm totalp = &total; 10057416Smarkm bzero(totalp, sizeof *totalp); 10157416Smarkm /* 10257416Smarkm * Mark all objects as inactive. 10357416Smarkm */ 10457416Smarkm GIANT_REQUIRED; 10557416Smarkm mtx_lock(&vm_object_list_mtx); 10657416Smarkm TAILQ_FOREACH(object, &vm_object_list, object_list) { 10757416Smarkm if (!VM_OBJECT_TRYLOCK(object)) { 10857416Smarkm /* 10957416Smarkm * Avoid a lock-order reversal. Consequently, 11057416Smarkm * the reported number of active pages may be 11157416Smarkm * greater than the actual number. 11257416Smarkm */ 11357416Smarkm continue; 11457416Smarkm } 11557416Smarkm vm_object_clear_flag(object, OBJ_ACTIVE); 11657416Smarkm VM_OBJECT_UNLOCK(object); 11757416Smarkm } 11857416Smarkm mtx_unlock(&vm_object_list_mtx); 11957416Smarkm /* 12057416Smarkm * Calculate process statistics. 12157416Smarkm */ 12257416Smarkm sx_slock(&allproc_lock); 12357416Smarkm FOREACH_PROC_IN_SYSTEM(p) { 12457416Smarkm if (p->p_flag & P_SYSTEM) 12557416Smarkm continue; 12657416Smarkm mtx_lock_spin(&sched_lock); 12757416Smarkm switch (p->p_state) { 12857416Smarkm case PRS_NEW: 12957416Smarkm mtx_unlock_spin(&sched_lock); 13057416Smarkm continue; 13157416Smarkm break; 13257416Smarkm default: 13357416Smarkm FOREACH_THREAD_IN_PROC(p, td) { 13457416Smarkm /* Need new statistics XXX */ 13557416Smarkm switch (td->td_state) { 13657416Smarkm case TDS_INHIBITED: 13757416Smarkm if (TD_ON_LOCK(td) || 13857416Smarkm (td->td_inhibitors == 13957416Smarkm TDI_SWAPPED)) { 14057416Smarkm totalp->t_sw++; 14157416Smarkm } else if (TD_IS_SLEEPING(td) || 14257416Smarkm TD_AWAITING_INTR(td) || 14357416Smarkm TD_IS_SUSPENDED(td)) { 14457416Smarkm if (td->td_priority <= PZERO) 14557416Smarkm totalp->t_dw++; 14657416Smarkm else 14757416Smarkm totalp->t_sl++; 14857416Smarkm } 14957416Smarkm break; 15057416Smarkm 15157416Smarkm case TDS_CAN_RUN: 15257416Smarkm totalp->t_sw++; 15357416Smarkm break; 15457416Smarkm case TDS_RUNQ: 15557416Smarkm case TDS_RUNNING: 15657416Smarkm totalp->t_rq++; 15757416Smarkm continue; 15857416Smarkm default: 15957416Smarkm break; 16057416Smarkm } 16157416Smarkm } 16257416Smarkm } 16357416Smarkm mtx_unlock_spin(&sched_lock); 16457416Smarkm /* 16557416Smarkm * Note active objects. 16657416Smarkm */ 16757416Smarkm paging = 0; 16857416Smarkm map = &p->p_vmspace->vm_map; 16957416Smarkm vm_map_lock_read(map); 17057416Smarkm for (entry = map->header.next; 17157416Smarkm entry != &map->header; entry = entry->next) { 17257416Smarkm if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 17357416Smarkm (object = entry->object.vm_object) == NULL) 17457416Smarkm continue; 17557416Smarkm VM_OBJECT_LOCK(object); 17657416Smarkm vm_object_set_flag(object, OBJ_ACTIVE); 17757416Smarkm paging |= object->paging_in_progress; 17857416Smarkm VM_OBJECT_UNLOCK(object); 17957416Smarkm } 18057416Smarkm vm_map_unlock_read(map); 18157416Smarkm if (paging) 18257416Smarkm totalp->t_pw++; 18357416Smarkm } 18457416Smarkm sx_sunlock(&allproc_lock); 18557416Smarkm /* 18657416Smarkm * Calculate object memory usage statistics. 18757416Smarkm */ 18857416Smarkm mtx_lock(&vm_object_list_mtx); 18957416Smarkm TAILQ_FOREACH(object, &vm_object_list, object_list) { 19057416Smarkm /* 19157416Smarkm * Perform unsynchronized reads on the object to avoid 19257416Smarkm * a lock-order reversal. In this case, the lack of 19357416Smarkm * synchronization should not impair the accuracy of 19457416Smarkm * the reported statistics. 19557416Smarkm */ 19657416Smarkm if (object->type == OBJT_DEVICE) { 19757416Smarkm /* 198233294Sstas * Devices, like /dev/mem, will badly skew our totals. 19957416Smarkm */ 20057416Smarkm continue; 20157416Smarkm } 20257416Smarkm totalp->t_vm += object->size; 20357416Smarkm totalp->t_rm += object->resident_page_count; 20457416Smarkm if (object->flags & OBJ_ACTIVE) { 20557416Smarkm totalp->t_avm += object->size; 20657416Smarkm totalp->t_arm += object->resident_page_count; 20757416Smarkm } 20857416Smarkm if (object->shadow_count > 1) { 20957416Smarkm /* shared object */ 21057416Smarkm totalp->t_vmshr += object->size; 21157416Smarkm totalp->t_rmshr += object->resident_page_count; 21257416Smarkm if (object->flags & OBJ_ACTIVE) { 21357416Smarkm totalp->t_avmshr += object->size; 21457416Smarkm totalp->t_armshr += object->resident_page_count; 21557416Smarkm } 21657416Smarkm } 21757416Smarkm } 21857416Smarkm mtx_unlock(&vm_object_list_mtx); 21957416Smarkm totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 22057416Smarkm return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 22157416Smarkm} 222 223/* 224 * vcnt() - accumulate statistics from all cpus and the global cnt 225 * structure. 226 * 227 * The vmmeter structure is now per-cpu as well as global. Those 228 * statistics which can be kept on a per-cpu basis (to avoid cache 229 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 230 * statistics, such as v_free_reserved, are left in the global 231 * structure. 232 * 233 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 234 */ 235static int 236vcnt(SYSCTL_HANDLER_ARGS) 237{ 238 int error = 0; 239 int count = *(int *)arg1; 240#ifdef SMP 241 int i; 242 int offset = (char *)arg1 - (char *)&cnt; 243 244 for (i = 0; i < mp_ncpus; ++i) { 245 struct pcpu *pcpu = pcpu_find(i); 246 count += *(int *)((char *)&pcpu->pc_cnt + offset); 247 } 248#else 249 int offset = (char *)arg1 - (char *)&cnt; 250 count += *(int *)((char *)PCPU_PTR(cnt) + offset); 251#endif 252 error = SYSCTL_OUT(req, &count, sizeof(int)); 253 return(error); 254} 255 256SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 257 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 258 "System virtual memory statistics"); 259SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 260SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 261SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 262SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 263 264SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 265 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 266SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 267 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 268SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 269 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 270SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 271 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 272SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 273 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 274SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 275 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 276SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 277 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 278SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 279 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 280SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 281 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 282SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 283 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 284SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 285 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 286SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 287 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 288SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 289 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 290SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 291 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 292SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 293 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 294SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 295 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 296SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 297 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 298SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 299 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 300SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 301 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 302SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 303 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 304SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 305 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 306SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 307 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 308SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 309 &cnt.v_dfree, 0, vcnt, "IU", ""); 310SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 311 &cnt.v_pfree, 0, vcnt, "IU", ""); 312SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 313 &cnt.v_tfree, 0, vcnt, "IU", ""); 314SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD, 315 &cnt.v_page_size, 0, vcnt, "IU", ""); 316SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD, 317 &cnt.v_page_count, 0, vcnt, "IU", ""); 318SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD, 319 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 320SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD, 321 &cnt.v_free_target, 0, vcnt, "IU", ""); 322SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD, 323 &cnt.v_free_min, 0, vcnt, "IU", ""); 324SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD, 325 &cnt.v_free_count, 0, vcnt, "IU", ""); 326SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD, 327 &cnt.v_wire_count, 0, vcnt, "IU", ""); 328SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD, 329 &cnt.v_active_count, 0, vcnt, "IU", ""); 330SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD, 331 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 332SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD, 333 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 334SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD, 335 &cnt.v_cache_count, 0, vcnt, "IU", ""); 336SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD, 337 &cnt.v_cache_min, 0, vcnt, "IU", ""); 338SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD, 339 &cnt.v_cache_max, 0, vcnt, "IU", ""); 340SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD, 341 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 342SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD, 343 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 344SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 345 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 346SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 347 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 348SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 349 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 350SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 351 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 352SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 353 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 354SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 355 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 356SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 357 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 358SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 359 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 360 361SYSCTL_INT(_vm_stats_misc, OID_AUTO, 362 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 363#if 0 364SYSCTL_INT(_vm_stats_misc, OID_AUTO, 365 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 366SYSCTL_INT(_vm_stats_misc, OID_AUTO, 367 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 368SYSCTL_INT(_vm_stats_misc, OID_AUTO, 369 first_page, CTLFLAG_RD, &first_page, 0, ""); 370SYSCTL_INT(_vm_stats_misc, OID_AUTO, 371 last_page, CTLFLAG_RD, &last_page, 0, ""); 372#endif 373