vm_meter.c revision 85227
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 85227 2001-10-20 13:10:43Z iedowse $ 35 */ 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/kernel.h> 40#include <sys/lock.h> 41#include <sys/mutex.h> 42#include <sys/proc.h> 43#include <sys/resource.h> 44#include <sys/sx.h> 45#include <sys/vmmeter.h> 46 47#include <vm/vm.h> 48#include <vm/vm_page.h> 49#include <vm/vm_extern.h> 50#include <vm/vm_param.h> 51#include <vm/pmap.h> 52#include <vm/vm_map.h> 53#include <vm/vm_object.h> 54#include <sys/sysctl.h> 55 56struct vmmeter cnt; 57 58int maxslp = MAXSLP; 59 60SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 61 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 62SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 63 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 64SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 65 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 66SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 67 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 68SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 69 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 70SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 71 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 72SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 73 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 74SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 75 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 76 77SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 78 &averunnable, loadavg, "Machine loadaverage history"); 79 80static int 81vmtotal(SYSCTL_HANDLER_ARGS) 82{ 83 struct proc *p; 84 struct vmtotal total, *totalp; 85 vm_map_entry_t entry; 86 vm_object_t object; 87 vm_map_t map; 88 int paging; 89 struct ksegrp *kg; 90 91 totalp = &total; 92 bzero(totalp, sizeof *totalp); 93 /* 94 * Mark all objects as inactive. 95 */ 96 GIANT_REQUIRED; 97 TAILQ_FOREACH(object, &vm_object_list, object_list) 98 vm_object_clear_flag(object, OBJ_ACTIVE); 99 /* 100 * Calculate process statistics. 101 */ 102 sx_slock(&allproc_lock); 103 FOREACH_PROC_IN_SYSTEM(p) { 104 if (p->p_flag & P_SYSTEM) 105 continue; 106 mtx_lock_spin(&sched_lock); 107 switch (p->p_stat) { 108 case 0: 109 mtx_unlock_spin(&sched_lock); 110 continue; 111 112 case SMTX: 113 case SSLEEP: 114 case SSTOP: 115 kg = &p->p_ksegrp; /* XXXKSE */ 116 if (p->p_sflag & PS_INMEM) { 117 if (kg->kg_pri.pri_level <= PZERO) 118 totalp->t_dw++; 119 else if (kg->kg_slptime < maxslp) 120 totalp->t_sl++; 121 } else if (kg->kg_slptime < maxslp) 122 totalp->t_sw++; 123 if (kg->kg_slptime >= maxslp) { 124 mtx_unlock_spin(&sched_lock); 125 continue; 126 } 127 break; 128 129 case SWAIT: 130 totalp->t_sl++; 131 continue; 132 133 case SRUN: 134 case SIDL: 135 if (p->p_sflag & PS_INMEM) 136 totalp->t_rq++; 137 else 138 totalp->t_sw++; 139 if (p->p_stat == SIDL) { 140 mtx_unlock_spin(&sched_lock); 141 continue; 142 } 143 break; 144 } 145 mtx_unlock_spin(&sched_lock); 146 /* 147 * Note active objects. 148 */ 149 paging = 0; 150 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 151 entry != &map->header; entry = entry->next) { 152 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 153 entry->object.vm_object == NULL) 154 continue; 155 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 156 paging |= entry->object.vm_object->paging_in_progress; 157 } 158 if (paging) 159 totalp->t_pw++; 160 } 161 sx_sunlock(&allproc_lock); 162 /* 163 * Calculate object memory usage statistics. 164 */ 165 TAILQ_FOREACH(object, &vm_object_list, object_list) { 166 /* 167 * devices, like /dev/mem, will badly skew our totals 168 */ 169 if (object->type == OBJT_DEVICE) 170 continue; 171 totalp->t_vm += object->size; 172 totalp->t_rm += object->resident_page_count; 173 if (object->flags & OBJ_ACTIVE) { 174 totalp->t_avm += object->size; 175 totalp->t_arm += object->resident_page_count; 176 } 177 if (object->shadow_count > 1) { 178 /* shared object */ 179 totalp->t_vmshr += object->size; 180 totalp->t_rmshr += object->resident_page_count; 181 if (object->flags & OBJ_ACTIVE) { 182 totalp->t_avmshr += object->size; 183 totalp->t_armshr += object->resident_page_count; 184 } 185 } 186 } 187 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 188 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 189} 190 191SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 192 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 193 "System virtual memory statistics"); 194SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 195SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 196SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 197SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 198SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 199 v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 200SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 201 v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 202SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 203 v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 204SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 205 &cnt.v_intr, 0, "Hardware interrupts"); 206SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 207 &cnt.v_soft, 0, "Software interrupts"); 208SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 209 v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 210SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 211 v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 212SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 213 v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 214SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 215 v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 216SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 217 v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 218SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 219 v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 220SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 221 v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 222SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 223 v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 224SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 225 v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 226SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 227 v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 228SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 229 v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 230SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 231 v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 232SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 233 v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 234SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 235 v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 236SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 237 v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 238SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 239 v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 240SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 241 v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 242SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 243 v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 244SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 245 v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 246SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 247 v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 248SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 249 v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 250SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 251 v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 252SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 253 v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 254SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 255 v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 256SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 257 v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 258SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 259 v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 260SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 261 v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 262SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 263 v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 264SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 265 v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 266SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 267 v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 268SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 269 v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 270SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 271 v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 272SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 273 v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 274SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 275 v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 276SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 277 v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 278SYSCTL_INT(_vm_stats_misc, OID_AUTO, 279 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 280SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 281 v_forks, CTLFLAG_RD, &cnt.v_forks, 0, "Number of fork() calls"); 282SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 283 v_vforks, CTLFLAG_RD, &cnt.v_vforks, 0, "Number of vfork() calls"); 284SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 285 v_rforks, CTLFLAG_RD, &cnt.v_rforks, 0, "Number of rfork() calls"); 286SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 287 v_kthreads, CTLFLAG_RD, &cnt.v_kthreads, 0, "Number of fork() calls by kernel"); 288SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 289 v_forkpages, CTLFLAG_RD, &cnt.v_forkpages, 0, "VM pages affected by fork()"); 290SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 291 v_vforkpages, CTLFLAG_RD, &cnt.v_vforkpages, 0, "VM pages affected by vfork()"); 292SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 293 v_rforkpages, CTLFLAG_RD, &cnt.v_rforkpages, 0, "VM pages affected by rfork()"); 294SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 295 v_kthreadpages, CTLFLAG_RD, &cnt.v_kthreadpages, 0, "VM pages affected by fork() by kernel"); 296#if 0 297SYSCTL_INT(_vm_stats_misc, OID_AUTO, 298 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 299SYSCTL_INT(_vm_stats_misc, OID_AUTO, 300 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 301SYSCTL_INT(_vm_stats_misc, OID_AUTO, 302 first_page, CTLFLAG_RD, &first_page, 0, ""); 303SYSCTL_INT(_vm_stats_misc, OID_AUTO, 304 last_page, CTLFLAG_RD, &last_page, 0, ""); 305SYSCTL_INT(_vm_stats_misc, OID_AUTO, 306 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 307SYSCTL_INT(_vm_stats_misc, OID_AUTO, 308 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 309#endif 310