227ee8a188
"time" wasn't a atomic variable, so splfoo() protection were needed around any access to it, unless you just wanted the seconds part. Most uses of time.tv_sec now uses the new variable time_second instead. gettime() changed to getmicrotime(0. Remove a couple of unneeded splfoo() protections, the new getmicrotime() is atomic, (until Bruce sets a breakpoint in it). A couple of places needed random data, so use read_random() instead of mucking about with time which isn't random. Add a new nfs_curusec() function. Mark a couple of bogosities involving the now disappeard time variable. Update ffs_update() to avoid the weird "== &time" checks, by fixing the one remaining call that passwd &time as args. Change profiling in ncr.c to use ticks instead of time. Resolution is the same. Add new function "tvtohz()" to avoid the bogus "splfoo(), add time, call hzto() which subtracts time" sequences. Reviewed by: bde
218 lines
6.3 KiB
C
218 lines
6.3 KiB
C
/*
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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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* $Id: vm_meter.c,v 1.24 1998/03/28 10:33:27 bde 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/resource.h>
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#include <sys/vmmeter.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_param.h>
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#include <sys/lock.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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#include <sys/sysctl.h>
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struct loadavg averunnable =
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{ {0, 0, 0}, FSCALE }; /* load average, of runnable procs */
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struct vmmeter cnt;
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static int maxslp = MAXSLP;
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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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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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* 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(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 != 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->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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void
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vmmeter()
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{
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if (time_second % 5 == 0)
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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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SYSCTL_INT(_vm, VM_V_FREE_MIN, v_free_min,
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CTLFLAG_RW, &cnt.v_free_min, 0, "");
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SYSCTL_INT(_vm, VM_V_FREE_TARGET, v_free_target,
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CTLFLAG_RW, &cnt.v_free_target, 0, "");
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SYSCTL_INT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
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CTLFLAG_RW, &cnt.v_free_reserved, 0, "");
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SYSCTL_INT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
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CTLFLAG_RW, &cnt.v_inactive_target, 0, "");
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SYSCTL_INT(_vm, VM_V_CACHE_MIN, v_cache_min,
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CTLFLAG_RW, &cnt.v_cache_min, 0, "");
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SYSCTL_INT(_vm, VM_V_CACHE_MAX, v_cache_max,
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CTLFLAG_RW, &cnt.v_cache_max, 0, "");
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SYSCTL_INT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
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CTLFLAG_RW, &cnt.v_pageout_free_min, 0, "");
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SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, &averunnable, loadavg, "");
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static int
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vmtotal SYSCTL_HANDLER_ARGS
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{
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struct proc *p;
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struct vmtotal total, *totalp;
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vm_map_entry_t entry;
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vm_object_t object;
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vm_map_t map;
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int paging;
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totalp = &total;
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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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for (object = TAILQ_FIRST(&vm_object_list);
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object != NULL;
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object = TAILQ_NEXT(object,object_list))
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object->flags &= ~OBJ_ACTIVE;
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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->eflags & (MAP_ENTRY_IS_A_MAP|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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for (object = TAILQ_FIRST(&vm_object_list);
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object != NULL;
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object = TAILQ_NEXT(object, object_list)) {
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totalp->t_vm += 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 += object->size;
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totalp->t_arm += object->resident_page_count;
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}
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if (object->shadow_count > 1) {
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/* shared object */
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totalp->t_vmshr += 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 += 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 + cnt.v_cache_count;
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return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
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}
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SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
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0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", "");
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