1 /* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 34 * $Id: vm_meter.c,v 1.22 1997/09/01 03:17:19 bde Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/proc.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/vmmeter.h> 42 43 #include <vm/vm.h> 44 #include <vm/vm_extern.h> 45 #include <vm/vm_param.h> 46 #include <sys/lock.h> 47 #include <vm/pmap.h> 48 #include <vm/vm_map.h> 49 #include <vm/vm_object.h> 50 #include <sys/sysctl.h> 51 52 struct loadavg averunnable = 53 { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ 54 55 struct vmmeter cnt; 56 57 static int maxslp = MAXSLP; 58 59 /* 60 * Constants for averages over 1, 5, and 15 minutes 61 * when sampling at 5 second intervals. 62 */ 63 static fixpt_t cexp[3] = { 64 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 65 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 66 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 67 }; 68 69 /* 70 * Compute a tenex style load average of a quantity on 71 * 1, 5 and 15 minute intervals. 72 */ 73 static void 74 loadav(struct loadavg *avg) 75 { 76 register int i, nrun; 77 register struct proc *p; 78 79 for (nrun = 0, p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 80 switch (p->p_stat) { 81 case SSLEEP: 82 if (p->p_priority > PZERO || p->p_slptime != 0) 83 continue; 84 /* fall through */ 85 case SRUN: 86 case SIDL: 87 nrun++; 88 } 89 } 90 for (i = 0; i < 3; i++) 91 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 92 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 93 } 94 95 void 96 vmmeter() 97 { 98 99 if (time.tv_sec % 5 == 0) 100 loadav(&averunnable); 101 if (proc0.p_slptime > maxslp / 2) 102 wakeup(&proc0); 103 } 104 105 SYSCTL_INT(_vm, VM_V_FREE_MIN, v_free_min, 106 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 107 SYSCTL_INT(_vm, VM_V_FREE_TARGET, v_free_target, 108 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 109 SYSCTL_INT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 110 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 111 SYSCTL_INT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 112 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 113 SYSCTL_INT(_vm, VM_V_CACHE_MIN, v_cache_min, 114 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 115 SYSCTL_INT(_vm, VM_V_CACHE_MAX, v_cache_max, 116 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 117 SYSCTL_INT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 118 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 119 120 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, &averunnable, loadavg, ""); 121 122 static int 123 vmtotal SYSCTL_HANDLER_ARGS 124 { 125 struct proc *p; 126 struct vmtotal total, *totalp; 127 vm_map_entry_t entry; 128 vm_object_t object; 129 vm_map_t map; 130 int paging; 131 132 totalp = &total; 133 bzero(totalp, sizeof *totalp); 134 /* 135 * Mark all objects as inactive. 136 */ 137 for (object = TAILQ_FIRST(&vm_object_list); 138 object != NULL; 139 object = TAILQ_NEXT(object,object_list)) 140 object->flags &= ~OBJ_ACTIVE; 141 /* 142 * Calculate process statistics. 143 */ 144 for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 145 if (p->p_flag & P_SYSTEM) 146 continue; 147 switch (p->p_stat) { 148 case 0: 149 continue; 150 151 case SSLEEP: 152 case SSTOP: 153 if (p->p_flag & P_INMEM) { 154 if (p->p_priority <= PZERO) 155 totalp->t_dw++; 156 else if (p->p_slptime < maxslp) 157 totalp->t_sl++; 158 } else if (p->p_slptime < maxslp) 159 totalp->t_sw++; 160 if (p->p_slptime >= maxslp) 161 continue; 162 break; 163 164 case SRUN: 165 case SIDL: 166 if (p->p_flag & P_INMEM) 167 totalp->t_rq++; 168 else 169 totalp->t_sw++; 170 if (p->p_stat == SIDL) 171 continue; 172 break; 173 } 174 /* 175 * Note active objects. 176 */ 177 paging = 0; 178 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 179 entry != &map->header; entry = entry->next) { 180 if ((entry->eflags & (MAP_ENTRY_IS_A_MAP|MAP_ENTRY_IS_SUB_MAP)) || 181 entry->object.vm_object == NULL) 182 continue; 183 entry->object.vm_object->flags |= OBJ_ACTIVE; 184 paging |= entry->object.vm_object->paging_in_progress; 185 } 186 if (paging) 187 totalp->t_pw++; 188 } 189 /* 190 * Calculate object memory usage statistics. 191 */ 192 for (object = TAILQ_FIRST(&vm_object_list); 193 object != NULL; 194 object = TAILQ_NEXT(object, object_list)) { 195 totalp->t_vm += object->size; 196 totalp->t_rm += object->resident_page_count; 197 if (object->flags & OBJ_ACTIVE) { 198 totalp->t_avm += object->size; 199 totalp->t_arm += object->resident_page_count; 200 } 201 if (object->shadow_count > 1) { 202 /* shared object */ 203 totalp->t_vmshr += object->size; 204 totalp->t_rmshr += object->resident_page_count; 205 if (object->flags & OBJ_ACTIVE) { 206 totalp->t_avmshr += object->size; 207 totalp->t_armshr += object->resident_page_count; 208 } 209 } 210 } 211 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 212 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 213 } 214 215 SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 216 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", ""); 217