vm_meter.c revision 69947
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 1458705Scharnier * 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 69947 2000-12-13 00:17:05Z jake $ 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_page.h> 4612726Sbde#include <vm/vm_extern.h> 4712662Sdg#include <vm/vm_param.h> 4822521Sdyson#include <sys/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 8169947Sjake ALLPROC_LOCK(AP_SHARED); 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; 8758634Scharnier /* FALLTHROUGH */ 881541Srgrimes case SRUN: 8965904Sjhb if ((p->p_flag & P_NOLOAD) != 0) 9065904Sjhb continue; 9165904Sjhb /* FALLTHROUGH */ 921541Srgrimes case SIDL: 931541Srgrimes nrun++; 941541Srgrimes } 951541Srgrimes } 9669947Sjake ALLPROC_LOCK(AP_RELEASE); 971541Srgrimes for (i = 0; i < 3; i++) 981541Srgrimes avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 995455Sdg nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 1001541Srgrimes} 1011541Srgrimes 1029507Sdgvoid 1039507Sdgvmmeter() 1049507Sdg{ 1059507Sdg 10634961Sphk if (time_second % 5 == 0) 1079507Sdg loadav(&averunnable); 1089507Sdg if (proc0.p_slptime > maxslp / 2) 1099507Sdg wakeup(&proc0); 1109507Sdg} 1119507Sdg 11262622SjhbSYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 11312286Sphk CTLFLAG_RW, &cnt.v_free_min, 0, ""); 11462622SjhbSYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 11512286Sphk CTLFLAG_RW, &cnt.v_free_target, 0, ""); 11662622SjhbSYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 11712286Sphk CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 11862622SjhbSYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 11912286Sphk CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 12062622SjhbSYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 12112286Sphk CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 12262622SjhbSYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 12312286Sphk CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 12462622SjhbSYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 12512286Sphk CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 12662622SjhbSYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 12751337Sdillon CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 12812286Sphk 12946381SbillfSYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 13046381Sbillf &averunnable, loadavg, "Machine loadaverage history"); 1311541Srgrimes 13212286Sphkstatic int 13362573Sphkvmtotal(SYSCTL_HANDLER_ARGS) 1341541Srgrimes{ 13512286Sphk struct proc *p; 13612286Sphk struct vmtotal total, *totalp; 13712286Sphk vm_map_entry_t entry; 13812286Sphk vm_object_t object; 13912286Sphk vm_map_t map; 1401541Srgrimes int paging; 1411541Srgrimes 14212286Sphk totalp = &total; 1431541Srgrimes bzero(totalp, sizeof *totalp); 1441541Srgrimes /* 1451541Srgrimes * Mark all objects as inactive. 1461541Srgrimes */ 14715809Sdyson for (object = TAILQ_FIRST(&vm_object_list); 1485455Sdg object != NULL; 14915809Sdyson object = TAILQ_NEXT(object,object_list)) 15038517Sdfr vm_object_clear_flag(object, OBJ_ACTIVE); 1511541Srgrimes /* 1521541Srgrimes * Calculate process statistics. 1531541Srgrimes */ 15469947Sjake ALLPROC_LOCK(AP_SHARED); 15514531Shsu for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 1561541Srgrimes if (p->p_flag & P_SYSTEM) 1571541Srgrimes continue; 1581541Srgrimes switch (p->p_stat) { 1591541Srgrimes case 0: 1601541Srgrimes continue; 1611541Srgrimes 16265557Sjasone case SMTX: 1631541Srgrimes case SSLEEP: 1641541Srgrimes case SSTOP: 1651541Srgrimes if (p->p_flag & P_INMEM) { 1661541Srgrimes if (p->p_priority <= PZERO) 1671541Srgrimes totalp->t_dw++; 1681541Srgrimes else if (p->p_slptime < maxslp) 1691541Srgrimes totalp->t_sl++; 1701541Srgrimes } else if (p->p_slptime < maxslp) 1711541Srgrimes totalp->t_sw++; 1721541Srgrimes if (p->p_slptime >= maxslp) 1731541Srgrimes continue; 1741541Srgrimes break; 1751541Srgrimes 17665557Sjasone case SWAIT: 17765557Sjasone totalp->t_sl++; 17865557Sjasone continue; 17965557Sjasone 1801541Srgrimes case SRUN: 1811541Srgrimes case SIDL: 1821541Srgrimes if (p->p_flag & P_INMEM) 1831541Srgrimes totalp->t_rq++; 1841541Srgrimes else 1851541Srgrimes totalp->t_sw++; 1861541Srgrimes if (p->p_stat == SIDL) 1871541Srgrimes continue; 1881541Srgrimes break; 1891541Srgrimes } 1901541Srgrimes /* 1911541Srgrimes * Note active objects. 1921541Srgrimes */ 1931541Srgrimes paging = 0; 1941541Srgrimes for (map = &p->p_vmspace->vm_map, entry = map->header.next; 1955455Sdg entry != &map->header; entry = entry->next) { 19643748Sdillon if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 1971541Srgrimes entry->object.vm_object == NULL) 1981541Srgrimes continue; 19938517Sdfr vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 2001541Srgrimes paging |= entry->object.vm_object->paging_in_progress; 2011541Srgrimes } 2021541Srgrimes if (paging) 2031541Srgrimes totalp->t_pw++; 2041541Srgrimes } 20569947Sjake ALLPROC_LOCK(AP_RELEASE); 2061541Srgrimes /* 2071541Srgrimes * Calculate object memory usage statistics. 2081541Srgrimes */ 20915809Sdyson for (object = TAILQ_FIRST(&vm_object_list); 2105455Sdg object != NULL; 21115809Sdyson object = TAILQ_NEXT(object, object_list)) { 21242957Sdillon /* 21342957Sdillon * devices, like /dev/mem, will badly skew our totals 21442957Sdillon */ 21542957Sdillon if (object->type == OBJT_DEVICE) 21642957Sdillon continue; 21718169Sdyson totalp->t_vm += object->size; 2181541Srgrimes totalp->t_rm += object->resident_page_count; 2191541Srgrimes if (object->flags & OBJ_ACTIVE) { 22018169Sdyson totalp->t_avm += object->size; 2211541Srgrimes totalp->t_arm += object->resident_page_count; 2221541Srgrimes } 22318169Sdyson if (object->shadow_count > 1) { 2241541Srgrimes /* shared object */ 22518169Sdyson totalp->t_vmshr += object->size; 2261541Srgrimes totalp->t_rmshr += object->resident_page_count; 2271541Srgrimes if (object->flags & OBJ_ACTIVE) { 22818169Sdyson totalp->t_avmshr += object->size; 2291541Srgrimes totalp->t_armshr += object->resident_page_count; 2301541Srgrimes } 2311541Srgrimes } 2321541Srgrimes } 2335455Sdg totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 23412286Sphk return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 2351541Srgrimes} 23612286Sphk 23712286SphkSYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 23846381Sbillf 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 23946381Sbillf "System virtual memory statistics"); 24040794SpeterSYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 24140794SpeterSYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 24240794SpeterSYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 24340794SpeterSYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 24462622SjhbSYSCTL_UINT(_vm_stats_sys, OID_AUTO, 24540794Speter v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 24662622SjhbSYSCTL_UINT(_vm_stats_sys, OID_AUTO, 24740794Speter v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 24862622SjhbSYSCTL_UINT(_vm_stats_sys, OID_AUTO, 24940794Speter v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 25062622SjhbSYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 25146381Sbillf &cnt.v_intr, 0, "Hardware interrupts"); 25262622SjhbSYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 25346381Sbillf &cnt.v_soft, 0, "Software interrupts"); 25462622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 25540794Speter v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 25662622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 25740794Speter v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 25862622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 25940794Speter v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 26062622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 26140794Speter v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 26262622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 26340794Speter v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 26462622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 26540794Speter v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 26662622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 26740794Speter v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 26862622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 26940794Speter v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 27062622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 27140794Speter v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 27262622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 27340794Speter v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 27462622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 27540794Speter v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 27662622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 27740794Speter v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 27862622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 27940794Speter v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 28062622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 28140794Speter v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 28262622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 28340794Speter v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 28462622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 28540794Speter v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 28662622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 28740794Speter v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 28862622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 28940794Speter v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 29062622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 29140794Speter v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 29262622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 29340794Speter v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 29462622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 29540794Speter v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 29662622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 29740794Speter v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 29862622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 29940794Speter v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 30062622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 30140794Speter v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 30262622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 30340794Speter v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 30462622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 30540794Speter v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 30662622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 30740794Speter v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 30862622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 30940794Speter v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 31062622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 31140794Speter v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 31262622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 31340794Speter v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 31462622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 31540794Speter v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 31662622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 31740794Speter v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 31862622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 31940794Speter v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 32062622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 32140794Speter v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 32262622SjhbSYSCTL_UINT(_vm_stats_vm, OID_AUTO, 32340794Speter v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 32440794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 32540794Speter zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 32640794Speter#if 0 32740794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 32840794Speter page_mask, CTLFLAG_RD, &page_mask, 0, ""); 32940794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 33040794Speter page_shift, CTLFLAG_RD, &page_shift, 0, ""); 33140794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 33240794Speter first_page, CTLFLAG_RD, &first_page, 0, ""); 33340794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 33440794Speter last_page, CTLFLAG_RD, &last_page, 0, ""); 33540794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 33640794Speter vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 33740794SpeterSYSCTL_INT(_vm_stats_misc, OID_AUTO, 33840794Speter vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 33940794Speter#endif 340