vm_meter.c revision 65557
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 65557 2000-09-07 01:33:02Z jasone $ 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 /* FALLTHROUGH */ 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_UINT(_vm, VM_V_FREE_MIN, v_free_min, 108 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 109SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 110 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 111SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 112 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 113SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 114 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 115SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 116 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 117SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 118 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 119SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 120 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 121SYSCTL_UINT(_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 SMTX: 157 case SSLEEP: 158 case SSTOP: 159 if (p->p_flag & P_INMEM) { 160 if (p->p_priority <= PZERO) 161 totalp->t_dw++; 162 else if (p->p_slptime < maxslp) 163 totalp->t_sl++; 164 } else if (p->p_slptime < maxslp) 165 totalp->t_sw++; 166 if (p->p_slptime >= maxslp) 167 continue; 168 break; 169 170 case SWAIT: 171 totalp->t_sl++; 172 continue; 173 174 case SRUN: 175 case SIDL: 176 if (p->p_flag & P_INMEM) 177 totalp->t_rq++; 178 else 179 totalp->t_sw++; 180 if (p->p_stat == SIDL) 181 continue; 182 break; 183 } 184 /* 185 * Note active objects. 186 */ 187 paging = 0; 188 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 189 entry != &map->header; entry = entry->next) { 190 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 191 entry->object.vm_object == NULL) 192 continue; 193 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 194 paging |= entry->object.vm_object->paging_in_progress; 195 } 196 if (paging) 197 totalp->t_pw++; 198 } 199 /* 200 * Calculate object memory usage statistics. 201 */ 202 for (object = TAILQ_FIRST(&vm_object_list); 203 object != NULL; 204 object = TAILQ_NEXT(object, object_list)) { 205 /* 206 * devices, like /dev/mem, will badly skew our totals 207 */ 208 if (object->type == OBJT_DEVICE) 209 continue; 210 totalp->t_vm += object->size; 211 totalp->t_rm += object->resident_page_count; 212 if (object->flags & OBJ_ACTIVE) { 213 totalp->t_avm += object->size; 214 totalp->t_arm += object->resident_page_count; 215 } 216 if (object->shadow_count > 1) { 217 /* shared object */ 218 totalp->t_vmshr += object->size; 219 totalp->t_rmshr += object->resident_page_count; 220 if (object->flags & OBJ_ACTIVE) { 221 totalp->t_avmshr += object->size; 222 totalp->t_armshr += object->resident_page_count; 223 } 224 } 225 } 226 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 227 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 228} 229 230SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 231 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 232 "System virtual memory statistics"); 233SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 234SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 235SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 236SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 237SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 238 v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 239SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 240 v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 241SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 242 v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 243SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 244 &cnt.v_intr, 0, "Hardware interrupts"); 245SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 246 &cnt.v_soft, 0, "Software interrupts"); 247SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 248 v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 249SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 250 v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 251SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 252 v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 253SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 254 v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 255SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 256 v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 257SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 258 v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 259SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 260 v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 261SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 262 v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 263SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 264 v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 265SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 266 v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 267SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 268 v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 269SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 270 v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 271SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 272 v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 273SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 274 v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 275SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 276 v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 277SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 278 v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 279SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 280 v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 281SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 282 v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 283SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 284 v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 285SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 286 v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 287SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 288 v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 289SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 290 v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 291SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 292 v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 293SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 294 v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 295SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 296 v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 297SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 298 v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 299SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 300 v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 301SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 302 v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 303SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 304 v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 305SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 306 v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 307SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 308 v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 309SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 310 v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 311SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 312 v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 313SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 314 v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 315SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 316 v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 317SYSCTL_INT(_vm_stats_misc, OID_AUTO, 318 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 319#if 0 320SYSCTL_INT(_vm_stats_misc, OID_AUTO, 321 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 322SYSCTL_INT(_vm_stats_misc, OID_AUTO, 323 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 324SYSCTL_INT(_vm_stats_misc, OID_AUTO, 325 first_page, CTLFLAG_RD, &first_page, 0, ""); 326SYSCTL_INT(_vm_stats_misc, OID_AUTO, 327 last_page, CTLFLAG_RD, &last_page, 0, ""); 328SYSCTL_INT(_vm_stats_misc, OID_AUTO, 329 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 330SYSCTL_INT(_vm_stats_misc, OID_AUTO, 331 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 332#endif 333