341 lines
8.8 KiB
C
341 lines
8.8 KiB
C
/* $NetBSD: uvm_meter.c,v 1.16 2000/11/30 11:04:44 simonb Exp $ */
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/*
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* Copyright (c) 1997 Charles D. Cranor and Washington University.
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California.
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*
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* 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 Charles D. Cranor,
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* Washington University, and the University of California, Berkeley
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* 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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* from: Id: uvm_meter.c,v 1.1.2.1 1997/08/14 19:10:35 chuck 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 <uvm/uvm_extern.h>
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#include <sys/sysctl.h>
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/*
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* maxslp: ???? XXXCDC
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*/
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int maxslp = MAXSLP; /* patchable ... */
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struct loadavg averunnable;
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/*
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* constants for averages over 1, 5, and 15 minutes when sampling at
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* 5 second intervals.
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*/
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static 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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* prototypes
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*/
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static void uvm_loadav __P((struct loadavg *));
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static void uvm_total __P((struct vmtotal *));
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static int sysctl_uvmexp __P((void *, size_t *));
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/*
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* uvm_meter: calculate load average and wake up the swapper (if needed)
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*/
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void
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uvm_meter()
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{
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if ((time.tv_sec % 5) == 0)
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uvm_loadav(&averunnable);
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if (proc0.p_slptime > (maxslp / 2))
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wakeup(&proc0);
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}
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/*
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* uvm_loadav: compute a tenex style load average of a quantity on
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* 1, 5, and 15 minute internvals.
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*/
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static void
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uvm_loadav(avg)
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struct loadavg *avg;
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{
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int i, nrun;
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struct proc *p;
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proclist_lock_read();
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nrun = 0;
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LIST_FOREACH(p, &allproc, p_list) {
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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 SONPROC:
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case SIDL:
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nrun++;
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}
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}
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proclist_unlock_read();
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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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* uvm_sysctl: sysctl hook into UVM system.
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*/
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int
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uvm_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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return (sysctl_rdstruct(oldp, oldlenp, newp, &averunnable,
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sizeof(averunnable)));
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case VM_METER:
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uvm_total(&vmtotals);
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return (sysctl_rdstruct(oldp, oldlenp, newp, &vmtotals,
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sizeof(vmtotals)));
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case VM_UVMEXP:
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return (sysctl_rdminstruct(oldp, oldlenp, newp, &uvmexp,
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sizeof(uvmexp)));
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case VM_UVMEXP2:
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if (newp)
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return (EPERM);
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return (sysctl_uvmexp(oldp, oldlenp));
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case VM_NKMEMPAGES:
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return (sysctl_rdint(oldp, oldlenp, newp, nkmempages));
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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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static int
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sysctl_uvmexp(oldp, oldlenp)
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void *oldp;
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size_t *oldlenp;
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{
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struct uvmexp_sysctl u;
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memset(&u, 0, sizeof(u));
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/* Entries here are in order of uvmexp_sysctl, not uvmexp */
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u.pagesize = uvmexp.pagesize;
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u.pagemask = uvmexp.pagemask;
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u.pageshift = uvmexp.pageshift;
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u.npages = uvmexp.npages;
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u.free = uvmexp.free;
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u.active = uvmexp.active;
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u.inactive = uvmexp.inactive;
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u.paging = uvmexp.paging;
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u.wired = uvmexp.wired;
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u.zeropages = uvmexp.zeropages;
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u.reserve_pagedaemon = uvmexp.reserve_pagedaemon;
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u.reserve_kernel = uvmexp.reserve_kernel;
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u.freemin = uvmexp.freemin;
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u.freetarg = uvmexp.freetarg;
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u.inactarg = uvmexp.inactarg;
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u.wiredmax = uvmexp.wiredmax;
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u.nswapdev = uvmexp.nswapdev;
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u.swpages = uvmexp.swpages;
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u.swpginuse = uvmexp.swpginuse;
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u.swpgonly = uvmexp.swpgonly;
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u.nswget = uvmexp.nswget;
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u.nanon = uvmexp.nanon;
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u.nanonneeded = uvmexp.nanonneeded;
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u.nfreeanon = uvmexp.nfreeanon;
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u.faults = uvmexp.faults;
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u.traps = uvmexp.traps;
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u.intrs = uvmexp.intrs;
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u.swtch = uvmexp.swtch;
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u.softs = uvmexp.softs;
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u.syscalls = uvmexp.syscalls;
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u.pageins = uvmexp.pageins;
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u.swapins = uvmexp.swapins;
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u.swapouts = uvmexp.swapouts;
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u.pgswapin = uvmexp.pgswapin;
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u.pgswapout = uvmexp.pgswapout;
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u.forks = uvmexp.forks;
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u.forks_ppwait = uvmexp.forks_ppwait;
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u.forks_sharevm = uvmexp.forks_sharevm;
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u.pga_zerohit = uvmexp.pga_zerohit;
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u.pga_zeromiss = uvmexp.pga_zeromiss;
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u.zeroaborts = uvmexp.zeroaborts;
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u.fltnoram = uvmexp.fltnoram;
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u.fltnoanon = uvmexp.fltnoanon;
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u.fltpgwait = uvmexp.fltpgwait;
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u.fltpgrele = uvmexp.fltpgrele;
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u.fltrelck = uvmexp.fltrelck;
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u.fltrelckok = uvmexp.fltrelckok;
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u.fltanget = uvmexp.fltanget;
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u.fltanretry = uvmexp.fltanretry;
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u.fltamcopy = uvmexp.fltamcopy;
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u.fltnamap = uvmexp.fltnamap;
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u.fltnomap = uvmexp.fltnomap;
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u.fltlget = uvmexp.fltlget;
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u.fltget = uvmexp.fltget;
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u.flt_anon = uvmexp.flt_anon;
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u.flt_acow = uvmexp.flt_acow;
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u.flt_obj = uvmexp.flt_obj;
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u.flt_prcopy = uvmexp.flt_prcopy;
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u.flt_przero = uvmexp.flt_przero;
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u.pdwoke = uvmexp.pdwoke;
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u.pdrevs = uvmexp.pdrevs;
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u.pdswout = uvmexp.pdswout;
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u.pdfreed = uvmexp.pdfreed;
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u.pdscans = uvmexp.pdscans;
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u.pdanscan = uvmexp.pdanscan;
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u.pdobscan = uvmexp.pdobscan;
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u.pdreact = uvmexp.pdreact;
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u.pdbusy = uvmexp.pdbusy;
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u.pdpageouts = uvmexp.pdpageouts;
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u.pdpending = uvmexp.pdpending;
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u.pddeact = uvmexp.pddeact;
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u.anonpages = uvmexp.anonpages;
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u.vnodepages = uvmexp.vnodepages;
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u.vtextpages = uvmexp.vtextpages;
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return (sysctl_rdminstruct(oldp, oldlenp, NULL, &u, sizeof(u)));
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}
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/*
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* uvm_total: calculate the current state of the system.
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*/
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static void
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uvm_total(totalp)
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struct vmtotal *totalp;
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{
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struct proc *p;
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#if 0
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vm_map_entry_t entry;
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vm_map_t map;
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int paging;
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#endif
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memset(totalp, 0, sizeof *totalp);
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/*
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* calculate process statistics
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*/
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proclist_lock_read();
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LIST_FOREACH(p, &allproc, p_list) {
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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 SONPROC:
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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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#if 0
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/*
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* XXXCDC: BOGUS! rethink this. in the mean time
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* don't do it.
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*/
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paging = 0;
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vm_map_lock(map);
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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.uvm_obj == NULL)
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continue;
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/* XXX how to do this with uvm */
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}
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vm_map_unlock(map);
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if (paging)
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totalp->t_pw++;
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#endif
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}
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proclist_unlock_read();
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/*
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* Calculate object memory usage statistics.
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*/
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totalp->t_free = uvmexp.free;
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totalp->t_vm = uvmexp.npages - uvmexp.free + uvmexp.swpginuse;
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totalp->t_avm = uvmexp.active + uvmexp.swpginuse; /* XXX */
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totalp->t_rm = uvmexp.npages - uvmexp.free;
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totalp->t_arm = uvmexp.active;
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totalp->t_vmshr = 0; /* XXX */
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totalp->t_avmshr = 0; /* XXX */
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totalp->t_rmshr = 0; /* XXX */
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totalp->t_armshr = 0; /* XXX */
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}
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