sysctl
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 1982, 1986, 1989 Regents of the University of California.
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* All rights reserved.
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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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@ -30,97 +30,35 @@
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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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* from: @(#)vm_meter.c 7.11 (Berkeley) 4/20/91
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* $Id: vm_meter.c,v 1.11 1994/05/05 05:41:00 cgd Exp $
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* from: @(#)vm_meter.c 8.4 (Berkeley) 1/4/94
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* $Id: vm_meter.c,v 1.12 1994/05/07 00:40:07 cgd Exp $
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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 <sys/vmmeter.h>
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#include <vm/vm_param.h>
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#include <vm/vm.h>
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#include <sys/sysctl.h>
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struct loadavg averunnable;
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#if defined(COMPAT_43) && (defined(vax) || defined(tahoe))
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double avenrun[3];
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#endif /* COMPAT_43 */
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int maxslp = MAXSLP;
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#ifndef MACHINE_NONCONTIG
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int saferss = SAFERSS;
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#endif /* MACHINE_NONCONTIG */
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static void vmtotal __P((void));
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static void loadav __P((fixpt_t *, int));
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void
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vmmeter()
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{
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register unsigned *cp, *rp, *sp;
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if (time.tv_sec % 5 == 0)
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vmtotal();
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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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static void
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vmtotal()
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{
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register struct proc *p;
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int nrun = 0;
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total.t_vm = 0;
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total.t_avm = 0;
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total.t_rm = 0;
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total.t_arm = 0;
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total.t_rq = 0;
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total.t_dw = 0;
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total.t_pw = 0;
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total.t_sl = 0;
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total.t_sw = 0;
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for (p = (struct proc *)allproc; p != NULL; p = p->p_next) {
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if (p->p_flag & P_SYSTEM)
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continue;
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if (p->p_stat) {
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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 == 0)
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nrun++;
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/* fall through */
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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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total.t_dw++;
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else if (p->p_slptime < maxslp)
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total.t_sl++;
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} else if (p->p_slptime < maxslp)
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total.t_sw++;
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if (p->p_slptime < maxslp)
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goto active;
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break;
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case SRUN:
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case SIDL:
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nrun++;
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if (p->p_flag & P_INMEM)
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total.t_rq++;
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else
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total.t_sw++;
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active:
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break;
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}
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}
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}
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/* XXXX */
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loadav(averunnable.ldavg, nrun);
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averunnable.fscale = FSCALE;
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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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@ -135,42 +73,156 @@ fixpt_t cexp[3] = {
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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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static void
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loadav(avg, n)
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register fixpt_t *avg;
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int n;
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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;
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register int i, nrun;
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register struct proc *p;
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for (nrun = 0, p = (struct proc *)allproc; p != NULL; p = p->p_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 != 0)
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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[i] = (cexp[i] * avg[i] + n * FSCALE * (FSCALE - cexp[i]))
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>> FSHIFT;
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#if defined(COMPAT_43) && (defined(vax) || defined(tahoe))
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for (i = 0; i < 3; i++)
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avenrun[i] = (double) averunnable.ldavg[i] / FSCALE;
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#endif /* COMPAT_43 */
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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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* Get load average (i.e. avenrunnable, via kinfo).
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* Attributes associated with virtual memory.
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*/
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/* ARGSUSED */
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kinfo_loadavg(op, where, acopysize, arg, aneeded)
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int op;
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char *where;
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int *acopysize, arg, *aneeded;
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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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int error;
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struct vmtotal vmtotals;
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if (where == NULL || acopysize == NULL) {
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*aneeded = sizeof(struct loadavg);
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return 0;
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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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if (*acopysize != sizeof(struct loadavg)) {
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*aneeded = sizeof(struct loadavg);
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*acopysize = 0;
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return 0;
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}
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*aneeded = 0;
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return copyout(&averunnable, where, *acopysize);
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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 = (struct proc *)allproc; p != NULL; p = p->p_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 |= 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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/*
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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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}
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