849c9b2bfd
will be allocated for the respective usage types when there is contention for memory. replace "vnode" and "vtext" with "file" and "exec" in uvmexp field names and sysctl names.
404 lines
10 KiB
C
404 lines
10 KiB
C
/* $NetBSD: uvm_meter.c,v 1.23 2001/12/09 03:07:19 chs 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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uvm_meter.c,v 1.23 2001/12/09 03:07:19 chs Exp $");
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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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int rv, t;
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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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#define UPDATEMIN(a, ap, bp, cp) \
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{ \
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t = uvmexp.ap; \
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rv = sysctl_int(oldp, oldlenp, newp, newlen, &t); \
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if (rv) { \
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return rv; \
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} \
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if (t + uvmexp.bp + uvmexp.cp > 95 || t < 0) { \
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return EINVAL; \
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} \
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uvmexp.ap = t; \
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uvmexp.a = t * 256 / 100; \
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return rv; \
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}
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case VM_ANONMIN:
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UPDATEMIN(anonmin, anonminpct, fileminpct, execminpct);
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case VM_EXECMIN:
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UPDATEMIN(execmin, execminpct, fileminpct, anonminpct);
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case VM_FILEMIN:
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UPDATEMIN(filemin, fileminpct, execminpct, anonminpct);
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#undef UPDATEMIN
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#define UPDATEMAX(a, ap) \
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{ \
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t = uvmexp.ap; \
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rv = sysctl_int(oldp, oldlenp, newp, newlen, &t); \
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if (rv) { \
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return rv; \
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} \
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if (t > 100 || t < 0) { \
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return EINVAL; \
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} \
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uvmexp.ap = t; \
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uvmexp.a = t * 256 / 100; \
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return rv; \
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}
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case VM_ANONMAX:
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UPDATEMAX(anonmax, anonmaxpct);
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case VM_EXECMAX:
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UPDATEMAX(execmax, execmaxpct);
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case VM_FILEMAX:
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UPDATEMAX(filemax, filemaxpct);
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#undef UPDATEMAX
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case VM_MAXSLP:
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return (sysctl_rdint(oldp, oldlenp, newp, maxslp));
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case VM_USPACE:
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return (sysctl_rdint(oldp, oldlenp, newp, USPACE));
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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.filepages = uvmexp.filepages;
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u.execpages = uvmexp.execpages;
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u.colorhit = uvmexp.colorhit;
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u.colormiss = uvmexp.colormiss;
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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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struct vm_map_entry * entry;
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struct vm_map *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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