a20d56e92e
called "MACHINE_NEW_NONCONGIG". this is required for UVM, the new VM system (also written by chuck) that is coming soon. adds new functions: vm_page_physload() -- tell the VM system about an area of memory. vm_physseg_find() -- returns index in vm_physmem array that this address is in. and several new versions of old functions/macros defined in vm_page.h. this is the MI portion. sparc, and then later i386 portions to come. all other ports need to change to this ASAP! (alpha is already being worked on)
231 lines
6.2 KiB
C
231 lines
6.2 KiB
C
/* $NetBSD: vm_meter.c,v 1.21 1998/01/08 11:36:24 mrg Exp $ */
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/*
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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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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <vm/vm.h>
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#include <sys/sysctl.h>
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struct loadavg averunnable; /* load average, of runnable procs */
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int maxslp = MAXSLP;
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#if !defined(MACHINE_NONCONTIG) && !defined(MACHINE_NEW_NONCONTIG)
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int saferss = SAFERSS;
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#endif /* MACHINE_NONCONTIG */
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void
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vmmeter()
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{
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if (time.tv_sec % 5 == 0)
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loadav(&averunnable);
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if (proc0.p_slptime > maxslp/2)
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wakeup((caddr_t)&proc0);
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}
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/*
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* Constants for averages over 1, 5, and 15 minutes
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* when sampling at 5 second intervals.
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*/
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fixpt_t cexp[3] = {
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0.9200444146293232 * FSCALE, /* exp(-1/12) */
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0.9834714538216174 * FSCALE, /* exp(-1/60) */
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0.9944598480048967 * FSCALE, /* exp(-1/180) */
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};
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/*
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* Compute a tenex style load average of a quantity on
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* 1, 5 and 15 minute intervals.
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*/
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void
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loadav(avg)
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register struct loadavg *avg;
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{
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register int i, nrun;
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register struct proc *p;
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for (nrun = 0, p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
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switch (p->p_stat) {
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case SSLEEP:
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if (p->p_priority > PZERO || p->p_slptime > 1)
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continue;
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/* fall through */
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case SRUN:
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case SIDL:
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nrun++;
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}
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}
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for (i = 0; i < 3; i++)
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avg->ldavg[i] = (cexp[i] * avg->ldavg[i] +
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nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT;
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}
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/*
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* Attributes associated with virtual memory.
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*/
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int
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vm_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
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int *name;
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u_int namelen;
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void *oldp;
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size_t *oldlenp;
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void *newp;
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size_t newlen;
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struct proc *p;
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{
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struct vmtotal vmtotals;
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/* all sysctl names at this level are terminal */
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if (namelen != 1)
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return (ENOTDIR); /* overloaded */
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switch (name[0]) {
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case VM_LOADAVG:
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averunnable.fscale = FSCALE;
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return (sysctl_rdstruct(oldp, oldlenp, newp, &averunnable,
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sizeof(averunnable)));
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case VM_METER:
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vmtotal(&vmtotals);
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return (sysctl_rdstruct(oldp, oldlenp, newp, &vmtotals,
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sizeof(vmtotals)));
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default:
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return (EOPNOTSUPP);
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}
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/* NOTREACHED */
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}
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/*
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* Calculate the current state of the system.
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* Done on demand from getkerninfo().
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*/
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void
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vmtotal(totalp)
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register struct vmtotal *totalp;
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{
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register struct proc *p;
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register vm_map_entry_t entry;
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register vm_object_t object;
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register vm_map_t map;
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int paging;
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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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simple_lock(&vm_object_list_lock);
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for (object = vm_object_list.tqh_first;
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object != NULL;
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object = object->object_list.tqe_next)
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object->flags &= ~OBJ_ACTIVE;
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simple_unlock(&vm_object_list_lock);
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/*
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* Calculate process statistics.
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*/
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for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
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if (p->p_flag & P_SYSTEM)
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continue;
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switch (p->p_stat) {
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case 0:
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continue;
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case SSLEEP:
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case SSTOP:
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if (p->p_flag & P_INMEM) {
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if (p->p_priority <= PZERO)
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totalp->t_dw++;
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else if (p->p_slptime < maxslp)
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totalp->t_sl++;
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} else if (p->p_slptime < maxslp)
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totalp->t_sw++;
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if (p->p_slptime >= maxslp)
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continue;
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break;
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case SRUN:
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case SIDL:
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if (p->p_flag & P_INMEM)
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totalp->t_rq++;
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else
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totalp->t_sw++;
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if (p->p_stat == SIDL)
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continue;
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break;
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}
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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->is_a_map || entry->is_sub_map ||
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entry->object.vm_object == NULL)
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continue;
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entry->object.vm_object->flags |= OBJ_ACTIVE;
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paging |= vm_object_paging(entry->object.vm_object);
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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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/*
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* Calculate object memory usage statistics.
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*/
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simple_lock(&vm_object_list_lock);
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for (object = vm_object_list.tqh_first;
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object != NULL;
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object = object->object_list.tqe_next) {
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totalp->t_vm += num_pages(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 += num_pages(object->size);
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totalp->t_arm += object->resident_page_count;
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}
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if (object->ref_count > 1) {
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/* shared object */
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totalp->t_vmshr += num_pages(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 += num_pages(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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totalp->t_free = cnt.v_free_count;
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simple_unlock(&vm_object_list_lock);
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}
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