mirror of
https://git.FreeBSD.org/src.git
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e602ba25fd
The ability to schedule multiple threads per process (one one cpu) by making ALL system calls optionally asynchronous. to come: ia64 and power-pc patches, patches for gdb, test program (in tools) Reviewed by: Almost everyone who counts (at various times, peter, jhb, matt, alfred, mini, bernd, and a cast of thousands) NOTE: this is still Beta code, and contains lots of debugging stuff. expect slight instability in signals..
355 lines
14 KiB
C
355 lines
14 KiB
C
/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)vm_meter.c 8.4 (Berkeley) 1/4/94
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/resource.h>
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#include <sys/sx.h>
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#include <sys/vmmeter.h>
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#include <sys/smp.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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#include <sys/sysctl.h>
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struct vmmeter cnt;
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int maxslp = MAXSLP;
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SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
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CTLFLAG_RW, &cnt.v_free_min, 0, "");
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SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
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CTLFLAG_RW, &cnt.v_free_target, 0, "");
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SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
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CTLFLAG_RW, &cnt.v_free_reserved, 0, "");
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SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
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CTLFLAG_RW, &cnt.v_inactive_target, 0, "");
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SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
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CTLFLAG_RW, &cnt.v_cache_min, 0, "");
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SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
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CTLFLAG_RW, &cnt.v_cache_max, 0, "");
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SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
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CTLFLAG_RW, &cnt.v_pageout_free_min, 0, "");
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SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
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CTLFLAG_RW, &cnt.v_free_severe, 0, "");
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SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
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&averunnable, loadavg, "Machine loadaverage history");
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static int
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vmtotal(SYSCTL_HANDLER_ARGS)
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{
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/* XXXKSE almost completely broken */
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struct proc *p;
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struct vmtotal total, *totalp;
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vm_map_entry_t entry;
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vm_object_t object;
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vm_map_t map;
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int paging;
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struct ksegrp *kg;
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struct thread *td;
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totalp = &total;
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bzero(totalp, sizeof *totalp);
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/*
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* Mark all objects as inactive.
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*/
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GIANT_REQUIRED;
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mtx_lock(&vm_object_list_mtx);
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TAILQ_FOREACH(object, &vm_object_list, object_list)
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vm_object_clear_flag(object, OBJ_ACTIVE);
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mtx_unlock(&vm_object_list_mtx);
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/*
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* Calculate process statistics.
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*/
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sx_slock(&allproc_lock);
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FOREACH_PROC_IN_SYSTEM(p) {
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if (p->p_flag & P_SYSTEM)
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continue;
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mtx_lock_spin(&sched_lock);
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switch (p->p_state) {
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case PRS_NEW:
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if (p->p_sflag & PS_INMEM)
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totalp->t_rq++;
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else
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totalp->t_sw++;
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mtx_unlock_spin(&sched_lock);
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continue;
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break;
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default:
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FOREACH_THREAD_IN_PROC(p, td) {
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switch (td->td_state) {
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case TDS_MTX:
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case TDS_SLP:
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kg = td->td_ksegrp; /* XXXKSE */
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if (p->p_sflag & PS_INMEM) {
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if (td->td_priority <= PZERO)
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totalp->t_dw++;
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else if (kg->kg_slptime
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< maxslp)
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totalp->t_sl++;
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} else if (kg->kg_slptime < maxslp)
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totalp->t_sw++;
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if (kg->kg_slptime >= maxslp) {
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continue;
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}
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break;
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case TDS_RUNQ:
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case TDS_RUNNING:
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if (p->p_sflag & PS_INMEM)
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totalp->t_rq++;
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else
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totalp->t_sw++;
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continue;
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case TDS_IWAIT:
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totalp->t_sl++;
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continue;
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default:
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break;
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}
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}
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}
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mtx_unlock_spin(&sched_lock);
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/*
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* Note active objects.
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*/
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paging = 0;
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for (map = &p->p_vmspace->vm_map, entry = map->header.next;
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entry != &map->header; entry = entry->next) {
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if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
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entry->object.vm_object == NULL)
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continue;
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vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
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paging |= entry->object.vm_object->paging_in_progress;
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}
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if (paging)
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totalp->t_pw++;
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}
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sx_sunlock(&allproc_lock);
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/*
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* Calculate object memory usage statistics.
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*/
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mtx_lock(&vm_object_list_mtx);
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TAILQ_FOREACH(object, &vm_object_list, object_list) {
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/*
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* devices, like /dev/mem, will badly skew our totals
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*/
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if (object->type == OBJT_DEVICE)
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continue;
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totalp->t_vm += object->size;
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totalp->t_rm += object->resident_page_count;
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if (object->flags & OBJ_ACTIVE) {
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totalp->t_avm += object->size;
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totalp->t_arm += object->resident_page_count;
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}
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if (object->shadow_count > 1) {
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/* shared object */
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totalp->t_vmshr += object->size;
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totalp->t_rmshr += object->resident_page_count;
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if (object->flags & OBJ_ACTIVE) {
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totalp->t_avmshr += object->size;
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totalp->t_armshr += object->resident_page_count;
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}
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}
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}
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mtx_unlock(&vm_object_list_mtx);
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totalp->t_free = cnt.v_free_count + cnt.v_cache_count;
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return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
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}
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/*
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* vcnt() - accumulate statistics from all cpus and the global cnt
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* structure.
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*
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* The vmmeter structure is now per-cpu as well as global. Those
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* statistics which can be kept on a per-cpu basis (to avoid cache
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* stalls between cpus) can be moved to the per-cpu vmmeter. Remaining
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* statistics, such as v_free_reserved, are left in the global
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* structure.
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*
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* (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
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*/
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static int
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vcnt(SYSCTL_HANDLER_ARGS)
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{
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int error = 0;
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int count = *(int *)arg1;
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#ifdef SMP
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int i;
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int offset = (char *)arg1 - (char *)&cnt;
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for (i = 0; i < mp_ncpus; ++i) {
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struct pcpu *pcpu = pcpu_find(i);
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count += *(int *)((char *)&pcpu->pc_cnt + offset);
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}
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#endif
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error = SYSCTL_OUT(req, &count, sizeof(int));
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return(error);
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}
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SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
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0, sizeof(struct vmtotal), vmtotal, "S,vmtotal",
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"System virtual memory statistics");
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SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
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SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
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SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
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SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
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SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_swtch, 0, vcnt, "IU", "Context switches");
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SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_trap, 0, vcnt, "IU", "Traps");
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SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_syscall, 0, vcnt, "IU", "Syscalls");
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SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts");
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SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_soft, 0, vcnt, "IU", "Software interrupts");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_vm_faults, 0, vcnt, "IU", "VM faults");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_cow_faults, 0, vcnt, "IU", "COW faults");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_zfod, 0, vcnt, "IU", "Zero fill");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_swapin, 0, vcnt, "IU", "Swapin operations");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_swapout, 0, vcnt, "IU", "Swapout operations");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_dfree, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_pfree, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_tfree, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_page_size, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_page_count, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_free_reserved, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_free_target, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_free_min, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_free_count, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_wire_count, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_active_count, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_inactive_target, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_inactive_count, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_cache_count, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_cache_min, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_cache_max, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_pageout_free_min, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_interrupt_free_min, 0, vcnt, "IU", "");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()");
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SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
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&cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel");
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SYSCTL_INT(_vm_stats_misc, OID_AUTO,
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zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");
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#if 0
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SYSCTL_INT(_vm_stats_misc, OID_AUTO,
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page_mask, CTLFLAG_RD, &page_mask, 0, "");
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SYSCTL_INT(_vm_stats_misc, OID_AUTO,
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page_shift, CTLFLAG_RD, &page_shift, 0, "");
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SYSCTL_INT(_vm_stats_misc, OID_AUTO,
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first_page, CTLFLAG_RD, &first_page, 0, "");
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SYSCTL_INT(_vm_stats_misc, OID_AUTO,
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last_page, CTLFLAG_RD, &last_page, 0, "");
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SYSCTL_INT(_vm_stats_misc, OID_AUTO,
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vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, "");
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SYSCTL_INT(_vm_stats_misc, OID_AUTO,
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vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, "");
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#endif
|