vm_meter.c revision 51337
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 3450477Speter * $FreeBSD: head/sys/vm/vm_meter.c 51337 1999-09-17 04:56:40Z dillon $ 351541Srgrimes */ 361541Srgrimes 371541Srgrimes#include <sys/param.h> 381541Srgrimes#include <sys/proc.h> 391541Srgrimes#include <sys/systm.h> 401541Srgrimes#include <sys/kernel.h> 4134924Sbde#include <sys/resource.h> 4212662Sdg#include <sys/vmmeter.h> 4312662Sdg 441541Srgrimes#include <vm/vm.h> 4540794Speter#include <vm/vm_prot.h> 4640794Speter#include <vm/vm_page.h> 4712726Sbde#include <vm/vm_extern.h> 4812662Sdg#include <vm/vm_param.h> 4922521Sdyson#include <sys/lock.h> 5012662Sdg#include <vm/pmap.h> 5112662Sdg#include <vm/vm_map.h> 5212662Sdg#include <vm/vm_object.h> 531541Srgrimes#include <sys/sysctl.h> 541541Srgrimes 5512623Sphkstruct loadavg averunnable = 5612623Sphk { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ 5712623Sphk 589759Sbdestruct vmmeter cnt; 591541Srgrimes 6012820Sphkstatic int maxslp = MAXSLP; 611541Srgrimes 621541Srgrimes/* 631541Srgrimes * Constants for averages over 1, 5, and 15 minutes 641541Srgrimes * when sampling at 5 second intervals. 651541Srgrimes */ 6612820Sphkstatic fixpt_t cexp[3] = { 671541Srgrimes 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 681541Srgrimes 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 691541Srgrimes 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 701541Srgrimes}; 711541Srgrimes 721541Srgrimes/* 731541Srgrimes * Compute a tenex style load average of a quantity on 741541Srgrimes * 1, 5 and 15 minute intervals. 751541Srgrimes */ 769507Sdgstatic void 7712286Sphkloadav(struct loadavg *avg) 781541Srgrimes{ 791541Srgrimes register int i, nrun; 801541Srgrimes register struct proc *p; 811541Srgrimes 8214531Shsu for (nrun = 0, p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 831541Srgrimes switch (p->p_stat) { 841541Srgrimes case SSLEEP: 851541Srgrimes if (p->p_priority > PZERO || p->p_slptime != 0) 861541Srgrimes continue; 871541Srgrimes /* fall through */ 881541Srgrimes case SRUN: 891541Srgrimes case SIDL: 901541Srgrimes nrun++; 911541Srgrimes } 921541Srgrimes } 931541Srgrimes for (i = 0; i < 3; i++) 941541Srgrimes avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 955455Sdg nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 961541Srgrimes} 971541Srgrimes 989507Sdgvoid 999507Sdgvmmeter() 1009507Sdg{ 1019507Sdg 10234961Sphk if (time_second % 5 == 0) 1039507Sdg loadav(&averunnable); 1049507Sdg if (proc0.p_slptime > maxslp / 2) 1059507Sdg wakeup(&proc0); 1069507Sdg} 1079507Sdg 10812286SphkSYSCTL_INT(_vm, VM_V_FREE_MIN, v_free_min, 10912286Sphk CTLFLAG_RW, &cnt.v_free_min, 0, ""); 11012286SphkSYSCTL_INT(_vm, VM_V_FREE_TARGET, v_free_target, 11112286Sphk CTLFLAG_RW, &cnt.v_free_target, 0, ""); 11212286SphkSYSCTL_INT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 11312286Sphk CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 11412286SphkSYSCTL_INT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 11512286Sphk CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 11612286SphkSYSCTL_INT(_vm, VM_V_CACHE_MIN, v_cache_min, 11712286Sphk CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 11812286SphkSYSCTL_INT(_vm, VM_V_CACHE_MAX, v_cache_max, 11912286Sphk CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 12012286SphkSYSCTL_INT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 12112286Sphk CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 12251337SdillonSYSCTL_INT(_vm, OID_AUTO, v_free_severe, 12351337Sdillon CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 12412286Sphk 12546381SbillfSYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 12646381Sbillf &averunnable, loadavg, "Machine loadaverage history"); 1271541Srgrimes 12812286Sphkstatic int 12912286Sphkvmtotal SYSCTL_HANDLER_ARGS 1301541Srgrimes{ 13112286Sphk struct proc *p; 13212286Sphk struct vmtotal total, *totalp; 13312286Sphk vm_map_entry_t entry; 13412286Sphk vm_object_t object; 13512286Sphk vm_map_t map; 1361541Srgrimes int paging; 1371541Srgrimes 13812286Sphk totalp = &total; 1391541Srgrimes bzero(totalp, sizeof *totalp); 1401541Srgrimes /* 1411541Srgrimes * Mark all objects as inactive. 1421541Srgrimes */ 14315809Sdyson for (object = TAILQ_FIRST(&vm_object_list); 1445455Sdg object != NULL; 14515809Sdyson object = TAILQ_NEXT(object,object_list)) 14638517Sdfr vm_object_clear_flag(object, OBJ_ACTIVE); 1471541Srgrimes /* 1481541Srgrimes * Calculate process statistics. 1491541Srgrimes */ 15014531Shsu for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 1511541Srgrimes if (p->p_flag & P_SYSTEM) 1521541Srgrimes continue; 1531541Srgrimes switch (p->p_stat) { 1541541Srgrimes case 0: 1551541Srgrimes continue; 1561541Srgrimes 1571541Srgrimes case SSLEEP: 1581541Srgrimes case SSTOP: 1591541Srgrimes if (p->p_flag & P_INMEM) { 1601541Srgrimes if (p->p_priority <= PZERO) 1611541Srgrimes totalp->t_dw++; 1621541Srgrimes else if (p->p_slptime < maxslp) 1631541Srgrimes totalp->t_sl++; 1641541Srgrimes } else if (p->p_slptime < maxslp) 1651541Srgrimes totalp->t_sw++; 1661541Srgrimes if (p->p_slptime >= maxslp) 1671541Srgrimes continue; 1681541Srgrimes break; 1691541Srgrimes 1701541Srgrimes case SRUN: 1711541Srgrimes case SIDL: 1721541Srgrimes if (p->p_flag & P_INMEM) 1731541Srgrimes totalp->t_rq++; 1741541Srgrimes else 1751541Srgrimes totalp->t_sw++; 1761541Srgrimes if (p->p_stat == SIDL) 1771541Srgrimes continue; 1781541Srgrimes break; 1791541Srgrimes } 1801541Srgrimes /* 1811541Srgrimes * Note active objects. 1821541Srgrimes */ 1831541Srgrimes paging = 0; 1841541Srgrimes for (map = &p->p_vmspace->vm_map, entry = map->header.next; 1855455Sdg entry != &map->header; entry = entry->next) { 18643748Sdillon if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 1871541Srgrimes entry->object.vm_object == NULL) 1881541Srgrimes continue; 18938517Sdfr vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 1901541Srgrimes paging |= entry->object.vm_object->paging_in_progress; 1911541Srgrimes } 1921541Srgrimes if (paging) 1931541Srgrimes totalp->t_pw++; 1941541Srgrimes } 1951541Srgrimes /* 1961541Srgrimes * Calculate object memory usage statistics. 1971541Srgrimes */ 19815809Sdyson for (object = TAILQ_FIRST(&vm_object_list); 1995455Sdg object != NULL; 20015809Sdyson object = TAILQ_NEXT(object, object_list)) { 20142957Sdillon /* 20242957Sdillon * devices, like /dev/mem, will badly skew our totals 20342957Sdillon */ 20442957Sdillon if (object->type == OBJT_DEVICE) 20542957Sdillon continue; 20618169Sdyson totalp->t_vm += object->size; 2071541Srgrimes totalp->t_rm += object->resident_page_count; 2081541Srgrimes if (object->flags & OBJ_ACTIVE) { 20918169Sdyson totalp->t_avm += object->size; 2101541Srgrimes totalp->t_arm += object->resident_page_count; 2111541Srgrimes } 21218169Sdyson if (object->shadow_count > 1) { 2131541Srgrimes /* shared object */ 21418169Sdyson totalp->t_vmshr += object->size; 2151541Srgrimes totalp->t_rmshr += object->resident_page_count; 2161541Srgrimes if (object->flags & OBJ_ACTIVE) { 21718169Sdyson totalp->t_avmshr += object->size; 2181541Srgrimes totalp->t_armshr += object->resident_page_count; 2191541Srgrimes } 2201541Srgrimes } 2211541Srgrimes } 2225455Sdg totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 22312286Sphk return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 2241541Srgrimes} 22512286Sphk 22612286SphkSYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 22746381Sbillf 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 22846381Sbillf "System virtual memory statistics"); 22940794SpeterSYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 23040794SpeterSYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 23140794SpeterSYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 23240794SpeterSYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 23340794SpeterSYSCTL_INT(_vm_stats_sys, OID_AUTO, 23440794Speter v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 23540794SpeterSYSCTL_INT(_vm_stats_sys, OID_AUTO, 23640794Speter v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 23740794SpeterSYSCTL_INT(_vm_stats_sys, OID_AUTO, 23840794Speter v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 23946381SbillfSYSCTL_INT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 24046381Sbillf &cnt.v_intr, 0, "Hardware interrupts"); 24146381SbillfSYSCTL_INT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 24246381Sbillf &cnt.v_soft, 0, "Software interrupts"); 24340794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 24440794Speter v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 24540794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 24640794Speter v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 24740794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 24840794Speter v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 24940794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 25040794Speter v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 25140794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 25240794Speter v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 25340794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 25440794Speter v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 25540794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 25640794Speter v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 25740794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 25840794Speter v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 25940794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 26040794Speter v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 26140794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 26240794Speter v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 26340794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 26440794Speter v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 26540794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 26640794Speter v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 26740794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 26840794Speter v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 26940794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 27040794Speter v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 27140794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 27240794Speter v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 27340794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 27440794Speter v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 27540794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 27640794Speter v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 27740794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 27840794Speter v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 27940794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 28040794Speter v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 28140794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 28240794Speter v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 28340794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 28440794Speter v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 28540794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 28640794Speter v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 28740794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 28840794Speter v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 28940794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 29040794Speter v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 29140794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 29240794Speter v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 29340794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 29440794Speter v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 29540794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 29640794Speter v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 29740794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 29840794Speter v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 29940794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 30040794Speter v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 30140794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 30240794Speter v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 30340794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 30440794Speter v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 30540794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 30640794Speter v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 30740794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 30840794Speter v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 30940794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 31040794Speter v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 31140794SpeterSYSCTL_INT(_vm_stats_vm, OID_AUTO, 31240794Speter v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 31340794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 31440794Speter zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 31540794Speter#if 0 31640794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 31740794Speter page_mask, CTLFLAG_RD, &page_mask, 0, ""); 31840794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 31940794Speter page_shift, CTLFLAG_RD, &page_shift, 0, ""); 32040794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 32140794Speter first_page, CTLFLAG_RD, &first_page, 0, ""); 32240794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 32340794Speter last_page, CTLFLAG_RD, &last_page, 0, ""); 32440794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 32540794Speter vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 32640794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 32740794Speter vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 32840794Speter#endif 329