vm_meter.c revision 21673
11541Srgrimes/* 21541Srgrimes * Copyright (c) 1982, 1986, 1989, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 3. All advertising materials mentioning features or use of this software 141541Srgrimes * must display the following acknowledgement: 151541Srgrimes * This product includes software developed by the University of 161541Srgrimes * California, Berkeley and its contributors. 171541Srgrimes * 4. Neither the name of the University nor the names of its contributors 181541Srgrimes * may be used to endorse or promote products derived from this software 191541Srgrimes * without specific prior written permission. 201541Srgrimes * 211541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311541Srgrimes * SUCH DAMAGE. 321541Srgrimes * 331541Srgrimes * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 3421673Sjkh * $FreeBSD: head/sys/vm/vm_meter.c 21673 1997-01-14 07:20:47Z jkh $ 351541Srgrimes */ 361541Srgrimes 371541Srgrimes#include <sys/param.h> 381541Srgrimes#include <sys/proc.h> 391541Srgrimes#include <sys/systm.h> 401541Srgrimes#include <sys/kernel.h> 4112662Sdg#include <sys/vmmeter.h> 4212662Sdg#include <sys/queue.h> 4312662Sdg 441541Srgrimes#include <vm/vm.h> 4512726Sbde#include <vm/vm_extern.h> 4612662Sdg#include <vm/vm_param.h> 4712662Sdg#include <vm/vm_prot.h> 4812662Sdg#include <vm/lock.h> 4912662Sdg#include <vm/pmap.h> 5012662Sdg#include <vm/vm_map.h> 5112662Sdg#include <vm/vm_object.h> 521541Srgrimes#include <sys/sysctl.h> 531541Srgrimes 5412623Sphkstruct loadavg averunnable = 5512623Sphk { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ 5612623Sphk 579759Sbdestruct vmmeter cnt; 581541Srgrimes 5912820Sphkstatic int maxslp = MAXSLP; 601541Srgrimes 611541Srgrimes/* 621541Srgrimes * Constants for averages over 1, 5, and 15 minutes 631541Srgrimes * when sampling at 5 second intervals. 641541Srgrimes */ 6512820Sphkstatic fixpt_t cexp[3] = { 661541Srgrimes 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 671541Srgrimes 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 681541Srgrimes 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 691541Srgrimes}; 701541Srgrimes 711541Srgrimes/* 721541Srgrimes * Compute a tenex style load average of a quantity on 731541Srgrimes * 1, 5 and 15 minute intervals. 741541Srgrimes */ 759507Sdgstatic void 7612286Sphkloadav(struct loadavg *avg) 771541Srgrimes{ 781541Srgrimes register int i, nrun; 791541Srgrimes register struct proc *p; 801541Srgrimes 8114531Shsu for (nrun = 0, p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 821541Srgrimes switch (p->p_stat) { 831541Srgrimes case SSLEEP: 841541Srgrimes if (p->p_priority > PZERO || p->p_slptime != 0) 851541Srgrimes continue; 861541Srgrimes /* fall through */ 871541Srgrimes case SRUN: 881541Srgrimes case SIDL: 891541Srgrimes nrun++; 901541Srgrimes } 911541Srgrimes } 921541Srgrimes for (i = 0; i < 3; i++) 931541Srgrimes avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 945455Sdg nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 951541Srgrimes} 961541Srgrimes 979507Sdgvoid 989507Sdgvmmeter() 999507Sdg{ 1009507Sdg 1019507Sdg if (time.tv_sec % 5 == 0) 1029507Sdg loadav(&averunnable); 1039507Sdg if (proc0.p_slptime > maxslp / 2) 1049507Sdg wakeup(&proc0); 1059507Sdg} 1069507Sdg 10712286SphkSYSCTL_INT(_vm, VM_V_FREE_MIN, v_free_min, 10812286Sphk CTLFLAG_RW, &cnt.v_free_min, 0, ""); 10912286SphkSYSCTL_INT(_vm, VM_V_FREE_TARGET, v_free_target, 11012286Sphk CTLFLAG_RW, &cnt.v_free_target, 0, ""); 11112286SphkSYSCTL_INT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 11212286Sphk CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 11312286SphkSYSCTL_INT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 11412286Sphk CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 11512286SphkSYSCTL_INT(_vm, VM_V_CACHE_MIN, v_cache_min, 11612286Sphk CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 11712286SphkSYSCTL_INT(_vm, VM_V_CACHE_MAX, v_cache_max, 11812286Sphk CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 11912286SphkSYSCTL_INT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 12012286Sphk CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 12112286Sphk 12212623SphkSYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, &averunnable, loadavg, ""); 1231541Srgrimes 12412286Sphkstatic int 12512286Sphkvmtotal SYSCTL_HANDLER_ARGS 1261541Srgrimes{ 12712286Sphk struct proc *p; 12812286Sphk struct vmtotal total, *totalp; 12912286Sphk vm_map_entry_t entry; 13012286Sphk vm_object_t object; 13112286Sphk vm_map_t map; 1321541Srgrimes int paging; 1331541Srgrimes 13412286Sphk totalp = &total; 1351541Srgrimes bzero(totalp, sizeof *totalp); 1361541Srgrimes /* 1371541Srgrimes * Mark all objects as inactive. 1381541Srgrimes */ 13915809Sdyson for (object = TAILQ_FIRST(&vm_object_list); 1405455Sdg object != NULL; 14115809Sdyson object = TAILQ_NEXT(object,object_list)) 1421541Srgrimes object->flags &= ~OBJ_ACTIVE; 1431541Srgrimes /* 1441541Srgrimes * Calculate process statistics. 1451541Srgrimes */ 14614531Shsu for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 1471541Srgrimes if (p->p_flag & P_SYSTEM) 1481541Srgrimes continue; 1491541Srgrimes switch (p->p_stat) { 1501541Srgrimes case 0: 1511541Srgrimes continue; 1521541Srgrimes 1531541Srgrimes case SSLEEP: 1541541Srgrimes case SSTOP: 1551541Srgrimes if (p->p_flag & P_INMEM) { 1561541Srgrimes if (p->p_priority <= PZERO) 1571541Srgrimes totalp->t_dw++; 1581541Srgrimes else if (p->p_slptime < maxslp) 1591541Srgrimes totalp->t_sl++; 1601541Srgrimes } else if (p->p_slptime < maxslp) 1611541Srgrimes totalp->t_sw++; 1621541Srgrimes if (p->p_slptime >= maxslp) 1631541Srgrimes continue; 1641541Srgrimes break; 1651541Srgrimes 1661541Srgrimes case SRUN: 1671541Srgrimes case SIDL: 1681541Srgrimes if (p->p_flag & P_INMEM) 1691541Srgrimes totalp->t_rq++; 1701541Srgrimes else 1711541Srgrimes totalp->t_sw++; 1721541Srgrimes if (p->p_stat == SIDL) 1731541Srgrimes continue; 1741541Srgrimes break; 1751541Srgrimes } 1761541Srgrimes /* 1771541Srgrimes * Note active objects. 1781541Srgrimes */ 1791541Srgrimes paging = 0; 1801541Srgrimes for (map = &p->p_vmspace->vm_map, entry = map->header.next; 1815455Sdg entry != &map->header; entry = entry->next) { 1821541Srgrimes if (entry->is_a_map || entry->is_sub_map || 1831541Srgrimes entry->object.vm_object == NULL) 1841541Srgrimes continue; 1851541Srgrimes entry->object.vm_object->flags |= OBJ_ACTIVE; 1861541Srgrimes paging |= entry->object.vm_object->paging_in_progress; 1871541Srgrimes } 1881541Srgrimes if (paging) 1891541Srgrimes totalp->t_pw++; 1901541Srgrimes } 1911541Srgrimes /* 1921541Srgrimes * Calculate object memory usage statistics. 1931541Srgrimes */ 19415809Sdyson for (object = TAILQ_FIRST(&vm_object_list); 1955455Sdg object != NULL; 19615809Sdyson object = TAILQ_NEXT(object, object_list)) { 19718169Sdyson totalp->t_vm += object->size; 1981541Srgrimes totalp->t_rm += object->resident_page_count; 1991541Srgrimes if (object->flags & OBJ_ACTIVE) { 20018169Sdyson totalp->t_avm += object->size; 2011541Srgrimes totalp->t_arm += object->resident_page_count; 2021541Srgrimes } 20318169Sdyson if (object->shadow_count > 1) { 2041541Srgrimes /* shared object */ 20518169Sdyson totalp->t_vmshr += object->size; 2061541Srgrimes totalp->t_rmshr += object->resident_page_count; 2071541Srgrimes if (object->flags & OBJ_ACTIVE) { 20818169Sdyson totalp->t_avmshr += object->size; 2091541Srgrimes totalp->t_armshr += object->resident_page_count; 2101541Srgrimes } 2111541Srgrimes } 2121541Srgrimes } 2135455Sdg totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 21412286Sphk return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 2151541Srgrimes} 21612286Sphk 21712286SphkSYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 21812623Sphk 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", ""); 219