vm_meter.c revision 12623
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 3412623Sphk * $Id: vm_meter.c,v 1.9 1995/11/14 09:29:34 phk Exp $ 351541Srgrimes */ 361541Srgrimes 371541Srgrimes#include <sys/param.h> 381541Srgrimes#include <sys/proc.h> 391541Srgrimes#include <sys/systm.h> 401541Srgrimes#include <sys/kernel.h> 411541Srgrimes#include <vm/vm.h> 421541Srgrimes#include <sys/sysctl.h> 431541Srgrimes 4412623Sphkstruct loadavg averunnable = 4512623Sphk { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ 4612623Sphk 479759Sbdestruct vmmeter cnt; 481541Srgrimes 495455Sdgint maxslp = MAXSLP; 501541Srgrimes 511541Srgrimes/* 521541Srgrimes * Constants for averages over 1, 5, and 15 minutes 531541Srgrimes * when sampling at 5 second intervals. 541541Srgrimes */ 555455Sdgfixpt_t cexp[3] = { 561541Srgrimes 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 571541Srgrimes 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 581541Srgrimes 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 591541Srgrimes}; 601541Srgrimes 611541Srgrimes/* 621541Srgrimes * Compute a tenex style load average of a quantity on 631541Srgrimes * 1, 5 and 15 minute intervals. 641541Srgrimes */ 659507Sdgstatic void 6612286Sphkloadav(struct loadavg *avg) 671541Srgrimes{ 681541Srgrimes register int i, nrun; 691541Srgrimes register struct proc *p; 701541Srgrimes 715455Sdg for (nrun = 0, p = (struct proc *) allproc; p != NULL; p = p->p_next) { 721541Srgrimes switch (p->p_stat) { 731541Srgrimes case SSLEEP: 741541Srgrimes if (p->p_priority > PZERO || p->p_slptime != 0) 751541Srgrimes continue; 761541Srgrimes /* fall through */ 771541Srgrimes case SRUN: 781541Srgrimes case SIDL: 791541Srgrimes nrun++; 801541Srgrimes } 811541Srgrimes } 821541Srgrimes for (i = 0; i < 3; i++) 831541Srgrimes avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 845455Sdg nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 851541Srgrimes} 861541Srgrimes 879507Sdgvoid 889507Sdgvmmeter() 899507Sdg{ 909507Sdg 919507Sdg if (time.tv_sec % 5 == 0) 929507Sdg loadav(&averunnable); 939507Sdg if (proc0.p_slptime > maxslp / 2) 949507Sdg wakeup(&proc0); 959507Sdg} 969507Sdg 9712286SphkSYSCTL_INT(_vm, VM_V_FREE_MIN, v_free_min, 9812286Sphk CTLFLAG_RW, &cnt.v_free_min, 0, ""); 9912286SphkSYSCTL_INT(_vm, VM_V_FREE_TARGET, v_free_target, 10012286Sphk CTLFLAG_RW, &cnt.v_free_target, 0, ""); 10112286SphkSYSCTL_INT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 10212286Sphk CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 10312286SphkSYSCTL_INT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 10412286Sphk CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 10512286SphkSYSCTL_INT(_vm, VM_V_CACHE_MIN, v_cache_min, 10612286Sphk CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 10712286SphkSYSCTL_INT(_vm, VM_V_CACHE_MAX, v_cache_max, 10812286Sphk CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 10912286SphkSYSCTL_INT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 11012286Sphk CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 11112286Sphk 11212623SphkSYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, &averunnable, loadavg, ""); 1131541Srgrimes 11412286Sphkstatic int 11512286Sphkvmtotal SYSCTL_HANDLER_ARGS 1161541Srgrimes{ 11712286Sphk struct proc *p; 11812286Sphk struct vmtotal total, *totalp; 11912286Sphk vm_map_entry_t entry; 12012286Sphk vm_object_t object; 12112286Sphk vm_map_t map; 1221541Srgrimes int paging; 1231541Srgrimes 12412286Sphk totalp = &total; 1251541Srgrimes bzero(totalp, sizeof *totalp); 1261541Srgrimes /* 1271541Srgrimes * Mark all objects as inactive. 1281541Srgrimes */ 1291541Srgrimes for (object = vm_object_list.tqh_first; 1305455Sdg object != NULL; 1315455Sdg object = object->object_list.tqe_next) 1321541Srgrimes object->flags &= ~OBJ_ACTIVE; 1331541Srgrimes /* 1341541Srgrimes * Calculate process statistics. 1351541Srgrimes */ 1365455Sdg for (p = (struct proc *) allproc; p != NULL; p = p->p_next) { 1371541Srgrimes if (p->p_flag & P_SYSTEM) 1381541Srgrimes continue; 1391541Srgrimes switch (p->p_stat) { 1401541Srgrimes case 0: 1411541Srgrimes continue; 1421541Srgrimes 1431541Srgrimes case SSLEEP: 1441541Srgrimes case SSTOP: 1451541Srgrimes if (p->p_flag & P_INMEM) { 1461541Srgrimes if (p->p_priority <= PZERO) 1471541Srgrimes totalp->t_dw++; 1481541Srgrimes else if (p->p_slptime < maxslp) 1491541Srgrimes totalp->t_sl++; 1501541Srgrimes } else if (p->p_slptime < maxslp) 1511541Srgrimes totalp->t_sw++; 1521541Srgrimes if (p->p_slptime >= maxslp) 1531541Srgrimes continue; 1541541Srgrimes break; 1551541Srgrimes 1561541Srgrimes case SRUN: 1571541Srgrimes case SIDL: 1581541Srgrimes if (p->p_flag & P_INMEM) 1591541Srgrimes totalp->t_rq++; 1601541Srgrimes else 1611541Srgrimes totalp->t_sw++; 1621541Srgrimes if (p->p_stat == SIDL) 1631541Srgrimes continue; 1641541Srgrimes break; 1651541Srgrimes } 1661541Srgrimes /* 1671541Srgrimes * Note active objects. 1681541Srgrimes */ 1691541Srgrimes paging = 0; 1701541Srgrimes for (map = &p->p_vmspace->vm_map, entry = map->header.next; 1715455Sdg entry != &map->header; entry = entry->next) { 1721541Srgrimes if (entry->is_a_map || entry->is_sub_map || 1731541Srgrimes entry->object.vm_object == NULL) 1741541Srgrimes continue; 1751541Srgrimes entry->object.vm_object->flags |= OBJ_ACTIVE; 1761541Srgrimes paging |= entry->object.vm_object->paging_in_progress; 1771541Srgrimes } 1781541Srgrimes if (paging) 1791541Srgrimes totalp->t_pw++; 1801541Srgrimes } 1811541Srgrimes /* 1821541Srgrimes * Calculate object memory usage statistics. 1831541Srgrimes */ 1841541Srgrimes for (object = vm_object_list.tqh_first; 1855455Sdg object != NULL; 1865455Sdg object = object->object_list.tqe_next) { 1871541Srgrimes totalp->t_vm += num_pages(object->size); 1881541Srgrimes totalp->t_rm += object->resident_page_count; 1891541Srgrimes if (object->flags & OBJ_ACTIVE) { 1901541Srgrimes totalp->t_avm += num_pages(object->size); 1911541Srgrimes totalp->t_arm += object->resident_page_count; 1921541Srgrimes } 1931541Srgrimes if (object->ref_count > 1) { 1941541Srgrimes /* shared object */ 1951541Srgrimes totalp->t_vmshr += num_pages(object->size); 1961541Srgrimes totalp->t_rmshr += object->resident_page_count; 1971541Srgrimes if (object->flags & OBJ_ACTIVE) { 1981541Srgrimes totalp->t_avmshr += num_pages(object->size); 1991541Srgrimes totalp->t_armshr += object->resident_page_count; 2001541Srgrimes } 2011541Srgrimes } 2021541Srgrimes } 2035455Sdg totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 20412286Sphk return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 2051541Srgrimes} 20612286Sphk 20712286SphkSYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 20812623Sphk 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", ""); 209