242 lines
6.1 KiB
C
242 lines
6.1 KiB
C
/* $NetBSD: uvm_meter.c,v 1.10 1999/07/25 06:30:36 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1997 Charles D. Cranor and Washington University.
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
|
* The Regents of the University of California.
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Charles D. Cranor,
|
|
* Washington University, and the University of California, Berkeley
|
|
* and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)vm_meter.c 8.4 (Berkeley) 1/4/94
|
|
* from: Id: uvm_meter.c,v 1.1.2.1 1997/08/14 19:10:35 chuck Exp
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <vm/vm.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
/*
|
|
* maxslp: ???? XXXCDC
|
|
*/
|
|
|
|
int maxslp = MAXSLP; /* patchable ... */
|
|
struct loadavg averunnable; /* decl. */
|
|
|
|
/*
|
|
* constants for averages over 1, 5, and 15 minutes when sampling at
|
|
* 5 second intervals.
|
|
*/
|
|
|
|
static fixpt_t cexp[3] = {
|
|
0.9200444146293232 * FSCALE, /* exp(-1/12) */
|
|
0.9834714538216174 * FSCALE, /* exp(-1/60) */
|
|
0.9944598480048967 * FSCALE, /* exp(-1/180) */
|
|
};
|
|
|
|
/*
|
|
* prototypes
|
|
*/
|
|
|
|
static void uvm_loadav __P((struct loadavg *));
|
|
static void uvm_total __P((struct vmtotal *));
|
|
|
|
/*
|
|
* uvm_meter: calculate load average and wake up the swapper (if needed)
|
|
*/
|
|
void
|
|
uvm_meter()
|
|
{
|
|
if ((time.tv_sec % 5) == 0)
|
|
uvm_loadav(&averunnable);
|
|
if (proc0.p_slptime > (maxslp / 2))
|
|
wakeup((caddr_t)&proc0);
|
|
}
|
|
|
|
/*
|
|
* uvm_loadav: compute a tenex style load average of a quantity on
|
|
* 1, 5, and 15 minute internvals.
|
|
*/
|
|
static void
|
|
uvm_loadav(avg)
|
|
struct loadavg *avg;
|
|
{
|
|
int i, nrun;
|
|
struct proc *p;
|
|
|
|
proclist_lock_read();
|
|
for (nrun = 0, p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
|
|
switch (p->p_stat) {
|
|
case SSLEEP:
|
|
if (p->p_priority > PZERO || p->p_slptime > 1)
|
|
continue;
|
|
/* fall through */
|
|
case SRUN:
|
|
case SIDL:
|
|
nrun++;
|
|
}
|
|
}
|
|
proclist_unlock_read();
|
|
for (i = 0; i < 3; i++)
|
|
avg->ldavg[i] = (cexp[i] * avg->ldavg[i] +
|
|
nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT;
|
|
}
|
|
|
|
/*
|
|
* uvm_sysctl: sysctl hook into UVM system.
|
|
*/
|
|
int
|
|
uvm_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
|
|
int *name;
|
|
u_int namelen;
|
|
void *oldp;
|
|
size_t *oldlenp;
|
|
void *newp;
|
|
size_t newlen;
|
|
struct proc *p;
|
|
{
|
|
struct vmtotal vmtotals;
|
|
|
|
/* all sysctl names at this level are terminal */
|
|
if (namelen != 1)
|
|
return (ENOTDIR); /* overloaded */
|
|
|
|
switch (name[0]) {
|
|
case VM_LOADAVG:
|
|
return (sysctl_rdstruct(oldp, oldlenp, newp, &averunnable,
|
|
sizeof(averunnable)));
|
|
|
|
case VM_METER:
|
|
uvm_total(&vmtotals);
|
|
return (sysctl_rdstruct(oldp, oldlenp, newp, &vmtotals,
|
|
sizeof(vmtotals)));
|
|
|
|
case VM_UVMEXP:
|
|
return (sysctl_rdstruct(oldp, oldlenp, newp, &uvmexp,
|
|
sizeof(uvmexp)));
|
|
|
|
default:
|
|
return (EOPNOTSUPP);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/*
|
|
* uvm_total: calculate the current state of the system.
|
|
*/
|
|
static void
|
|
uvm_total(totalp)
|
|
struct vmtotal *totalp;
|
|
{
|
|
struct proc *p;
|
|
#if 0
|
|
vm_map_entry_t entry;
|
|
vm_map_t map;
|
|
int paging;
|
|
#endif
|
|
|
|
memset(totalp, 0, sizeof *totalp);
|
|
|
|
/*
|
|
* calculate process statistics
|
|
*/
|
|
|
|
proclist_lock_read();
|
|
for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
|
|
if (p->p_flag & P_SYSTEM)
|
|
continue;
|
|
switch (p->p_stat) {
|
|
case 0:
|
|
continue;
|
|
|
|
case SSLEEP:
|
|
case SSTOP:
|
|
if (p->p_flag & P_INMEM) {
|
|
if (p->p_priority <= PZERO)
|
|
totalp->t_dw++;
|
|
else if (p->p_slptime < maxslp)
|
|
totalp->t_sl++;
|
|
} else if (p->p_slptime < maxslp)
|
|
totalp->t_sw++;
|
|
if (p->p_slptime >= maxslp)
|
|
continue;
|
|
break;
|
|
|
|
case SRUN:
|
|
case SIDL:
|
|
if (p->p_flag & P_INMEM)
|
|
totalp->t_rq++;
|
|
else
|
|
totalp->t_sw++;
|
|
if (p->p_stat == SIDL)
|
|
continue;
|
|
break;
|
|
}
|
|
/*
|
|
* note active objects
|
|
*/
|
|
#if 0
|
|
/*
|
|
* XXXCDC: BOGUS! rethink this. in the mean time
|
|
* don't do it.
|
|
*/
|
|
paging = 0;
|
|
vm_map_lock(map);
|
|
for (map = &p->p_vmspace->vm_map, entry = map->header.next;
|
|
entry != &map->header; entry = entry->next) {
|
|
if (entry->is_a_map || entry->is_sub_map ||
|
|
entry->object.uvm_obj == NULL)
|
|
continue;
|
|
/* XXX how to do this with uvm */
|
|
}
|
|
vm_map_unlock(map);
|
|
if (paging)
|
|
totalp->t_pw++;
|
|
#endif
|
|
}
|
|
proclist_unlock_read();
|
|
/*
|
|
* Calculate object memory usage statistics.
|
|
*/
|
|
totalp->t_free = uvmexp.free;
|
|
totalp->t_vm = uvmexp.npages - uvmexp.free + uvmexp.swpginuse;
|
|
totalp->t_avm = uvmexp.active + uvmexp.swpginuse; /* XXX */
|
|
totalp->t_rm = uvmexp.npages - uvmexp.free;
|
|
totalp->t_arm = uvmexp.active;
|
|
totalp->t_vmshr = 0; /* XXX */
|
|
totalp->t_avmshr = 0; /* XXX */
|
|
totalp->t_rmshr = 0; /* XXX */
|
|
totalp->t_armshr = 0; /* XXX */
|
|
}
|