vm_meter.c revision 52635
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 * $FreeBSD: head/sys/vm/vm_meter.c 52635 1999-10-29 18:09:36Z phk $ 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/resource.h> 42#include <sys/vmmeter.h> 43 44#include <vm/vm.h> 45#include <vm/vm_page.h> 46#include <vm/vm_extern.h> 47#include <vm/vm_param.h> 48#include <sys/lock.h> 49#include <vm/pmap.h> 50#include <vm/vm_map.h> 51#include <vm/vm_object.h> 52#include <sys/sysctl.h> 53 54struct loadavg averunnable = 55 { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ 56 57struct vmmeter cnt; 58 59static int maxslp = MAXSLP; 60 61/* 62 * Constants for averages over 1, 5, and 15 minutes 63 * when sampling at 5 second intervals. 64 */ 65static fixpt_t cexp[3] = { 66 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 67 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 68 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 69}; 70 71/* 72 * Compute a tenex style load average of a quantity on 73 * 1, 5 and 15 minute intervals. 74 */ 75static void 76loadav(struct loadavg *avg) 77{ 78 register int i, nrun; 79 register struct proc *p; 80 81 for (nrun = 0, p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 82 switch (p->p_stat) { 83 case SSLEEP: 84 if (p->p_priority > PZERO || p->p_slptime != 0) 85 continue; 86 /* fall through */ 87 case SRUN: 88 case SIDL: 89 nrun++; 90 } 91 } 92 for (i = 0; i < 3; i++) 93 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 94 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 95} 96 97void 98vmmeter() 99{ 100 101 if (time_second % 5 == 0) 102 loadav(&averunnable); 103 if (proc0.p_slptime > maxslp / 2) 104 wakeup(&proc0); 105} 106 107SYSCTL_INT(_vm, VM_V_FREE_MIN, v_free_min, 108 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 109SYSCTL_INT(_vm, VM_V_FREE_TARGET, v_free_target, 110 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 111SYSCTL_INT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 112 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 113SYSCTL_INT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 114 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 115SYSCTL_INT(_vm, VM_V_CACHE_MIN, v_cache_min, 116 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 117SYSCTL_INT(_vm, VM_V_CACHE_MAX, v_cache_max, 118 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 119SYSCTL_INT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 120 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 121SYSCTL_INT(_vm, OID_AUTO, v_free_severe, 122 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 123 124SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 125 &averunnable, loadavg, "Machine loadaverage history"); 126 127static int 128vmtotal SYSCTL_HANDLER_ARGS 129{ 130 struct proc *p; 131 struct vmtotal total, *totalp; 132 vm_map_entry_t entry; 133 vm_object_t object; 134 vm_map_t map; 135 int paging; 136 137 totalp = &total; 138 bzero(totalp, sizeof *totalp); 139 /* 140 * Mark all objects as inactive. 141 */ 142 for (object = TAILQ_FIRST(&vm_object_list); 143 object != NULL; 144 object = TAILQ_NEXT(object,object_list)) 145 vm_object_clear_flag(object, OBJ_ACTIVE); 146 /* 147 * Calculate process statistics. 148 */ 149 for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 150 if (p->p_flag & P_SYSTEM) 151 continue; 152 switch (p->p_stat) { 153 case 0: 154 continue; 155 156 case SSLEEP: 157 case SSTOP: 158 if (p->p_flag & P_INMEM) { 159 if (p->p_priority <= PZERO) 160 totalp->t_dw++; 161 else if (p->p_slptime < maxslp) 162 totalp->t_sl++; 163 } else if (p->p_slptime < maxslp) 164 totalp->t_sw++; 165 if (p->p_slptime >= maxslp) 166 continue; 167 break; 168 169 case SRUN: 170 case SIDL: 171 if (p->p_flag & P_INMEM) 172 totalp->t_rq++; 173 else 174 totalp->t_sw++; 175 if (p->p_stat == SIDL) 176 continue; 177 break; 178 } 179 /* 180 * Note active objects. 181 */ 182 paging = 0; 183 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 184 entry != &map->header; entry = entry->next) { 185 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 186 entry->object.vm_object == NULL) 187 continue; 188 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 189 paging |= entry->object.vm_object->paging_in_progress; 190 } 191 if (paging) 192 totalp->t_pw++; 193 } 194 /* 195 * Calculate object memory usage statistics. 196 */ 197 for (object = TAILQ_FIRST(&vm_object_list); 198 object != NULL; 199 object = TAILQ_NEXT(object, object_list)) { 200 /* 201 * devices, like /dev/mem, will badly skew our totals 202 */ 203 if (object->type == OBJT_DEVICE) 204 continue; 205 totalp->t_vm += object->size; 206 totalp->t_rm += object->resident_page_count; 207 if (object->flags & OBJ_ACTIVE) { 208 totalp->t_avm += object->size; 209 totalp->t_arm += object->resident_page_count; 210 } 211 if (object->shadow_count > 1) { 212 /* shared object */ 213 totalp->t_vmshr += object->size; 214 totalp->t_rmshr += object->resident_page_count; 215 if (object->flags & OBJ_ACTIVE) { 216 totalp->t_avmshr += object->size; 217 totalp->t_armshr += object->resident_page_count; 218 } 219 } 220 } 221 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 222 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 223} 224 225SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 226 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 227 "System virtual memory statistics"); 228SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 229SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 230SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 231SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 232SYSCTL_INT(_vm_stats_sys, OID_AUTO, 233 v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 234SYSCTL_INT(_vm_stats_sys, OID_AUTO, 235 v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 236SYSCTL_INT(_vm_stats_sys, OID_AUTO, 237 v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 238SYSCTL_INT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 239 &cnt.v_intr, 0, "Hardware interrupts"); 240SYSCTL_INT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 241 &cnt.v_soft, 0, "Software interrupts"); 242SYSCTL_INT(_vm_stats_vm, OID_AUTO, 243 v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 244SYSCTL_INT(_vm_stats_vm, OID_AUTO, 245 v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 246SYSCTL_INT(_vm_stats_vm, OID_AUTO, 247 v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 248SYSCTL_INT(_vm_stats_vm, OID_AUTO, 249 v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 250SYSCTL_INT(_vm_stats_vm, OID_AUTO, 251 v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 252SYSCTL_INT(_vm_stats_vm, OID_AUTO, 253 v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 254SYSCTL_INT(_vm_stats_vm, OID_AUTO, 255 v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 256SYSCTL_INT(_vm_stats_vm, OID_AUTO, 257 v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 258SYSCTL_INT(_vm_stats_vm, OID_AUTO, 259 v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 260SYSCTL_INT(_vm_stats_vm, OID_AUTO, 261 v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 262SYSCTL_INT(_vm_stats_vm, OID_AUTO, 263 v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 264SYSCTL_INT(_vm_stats_vm, OID_AUTO, 265 v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 266SYSCTL_INT(_vm_stats_vm, OID_AUTO, 267 v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 268SYSCTL_INT(_vm_stats_vm, OID_AUTO, 269 v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 270SYSCTL_INT(_vm_stats_vm, OID_AUTO, 271 v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 272SYSCTL_INT(_vm_stats_vm, OID_AUTO, 273 v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 274SYSCTL_INT(_vm_stats_vm, OID_AUTO, 275 v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 276SYSCTL_INT(_vm_stats_vm, OID_AUTO, 277 v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 278SYSCTL_INT(_vm_stats_vm, OID_AUTO, 279 v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 280SYSCTL_INT(_vm_stats_vm, OID_AUTO, 281 v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 282SYSCTL_INT(_vm_stats_vm, OID_AUTO, 283 v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 284SYSCTL_INT(_vm_stats_vm, OID_AUTO, 285 v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 286SYSCTL_INT(_vm_stats_vm, OID_AUTO, 287 v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 288SYSCTL_INT(_vm_stats_vm, OID_AUTO, 289 v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 290SYSCTL_INT(_vm_stats_vm, OID_AUTO, 291 v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 292SYSCTL_INT(_vm_stats_vm, OID_AUTO, 293 v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 294SYSCTL_INT(_vm_stats_vm, OID_AUTO, 295 v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 296SYSCTL_INT(_vm_stats_vm, OID_AUTO, 297 v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 298SYSCTL_INT(_vm_stats_vm, OID_AUTO, 299 v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 300SYSCTL_INT(_vm_stats_vm, OID_AUTO, 301 v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 302SYSCTL_INT(_vm_stats_vm, OID_AUTO, 303 v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 304SYSCTL_INT(_vm_stats_vm, OID_AUTO, 305 v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 306SYSCTL_INT(_vm_stats_vm, OID_AUTO, 307 v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 308SYSCTL_INT(_vm_stats_vm, OID_AUTO, 309 v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 310SYSCTL_INT(_vm_stats_vm, OID_AUTO, 311 v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 312SYSCTL_INT(_vm_stats_misc, OID_AUTO, 313 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 314#if 0 315SYSCTL_INT(_vm_stats_misc, OID_AUTO, 316 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 317SYSCTL_INT(_vm_stats_misc, OID_AUTO, 318 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 319SYSCTL_INT(_vm_stats_misc, OID_AUTO, 320 first_page, CTLFLAG_RD, &first_page, 0, ""); 321SYSCTL_INT(_vm_stats_misc, OID_AUTO, 322 last_page, CTLFLAG_RD, &last_page, 0, ""); 323SYSCTL_INT(_vm_stats_misc, OID_AUTO, 324 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 325SYSCTL_INT(_vm_stats_misc, OID_AUTO, 326 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 327#endif 328