Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_meter.c
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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 * $FreeBSD$ 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 54 struct vmmeter cnt; 55 56 static int maxslp = MAXSLP; 57 58 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 59 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 60 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 61 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 62 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 63 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 64 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 65 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 66 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 67 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 68 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 69 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 70 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 71 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 72 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 73 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 74 SYSCTL_UINT(_vm, OID_AUTO, v_intrans_coll, 75 CTLFLAG_RW, &cnt.v_intrans_coll, 0, ""); 76 SYSCTL_UINT(_vm, OID_AUTO, v_intrans_wait, 77 CTLFLAG_RW, &cnt.v_intrans_wait, 0, ""); 78 79 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 80 &averunnable, loadavg, "Machine loadaverage history"); 81 82 static int 83 vmtotal(SYSCTL_HANDLER_ARGS) 84 { 85 struct proc *p; 86 struct vmtotal total, *totalp; 87 vm_map_entry_t entry; 88 vm_object_t object; 89 vm_map_t map; 90 int paging; 91 92 totalp = &total; 93 bzero(totalp, sizeof *totalp); 94 /* 95 * Mark all objects as inactive. 96 */ 97 for (object = TAILQ_FIRST(&vm_object_list); 98 object != NULL; 99 object = TAILQ_NEXT(object,object_list)) 100 vm_object_clear_flag(object, OBJ_ACTIVE); 101 /* 102 * Calculate process statistics. 103 */ 104 for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 105 if (p->p_flag & P_SYSTEM) 106 continue; 107 switch (p->p_stat) { 108 case 0: 109 continue; 110 111 case SSLEEP: 112 case SSTOP: 113 if (p->p_flag & P_INMEM) { 114 if (p->p_priority <= PZERO) 115 totalp->t_dw++; 116 else if (p->p_slptime < maxslp) 117 totalp->t_sl++; 118 } else if (p->p_slptime < maxslp) 119 totalp->t_sw++; 120 if (p->p_slptime >= maxslp) 121 continue; 122 break; 123 124 case SRUN: 125 case SIDL: 126 if (p->p_flag & P_INMEM) 127 totalp->t_rq++; 128 else 129 totalp->t_sw++; 130 if (p->p_stat == SIDL) 131 continue; 132 break; 133 } 134 /* 135 * Note active objects. 136 */ 137 paging = 0; 138 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 139 entry != &map->header; entry = entry->next) { 140 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 141 entry->object.vm_object == NULL) 142 continue; 143 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 144 paging |= entry->object.vm_object->paging_in_progress; 145 } 146 if (paging) 147 totalp->t_pw++; 148 } 149 /* 150 * Calculate object memory usage statistics. 151 */ 152 for (object = TAILQ_FIRST(&vm_object_list); 153 object != NULL; 154 object = TAILQ_NEXT(object, object_list)) { 155 /* 156 * devices, like /dev/mem, will badly skew our totals 157 */ 158 if (object->type == OBJT_DEVICE) 159 continue; 160 totalp->t_vm += object->size; 161 totalp->t_rm += object->resident_page_count; 162 if (object->flags & OBJ_ACTIVE) { 163 totalp->t_avm += object->size; 164 totalp->t_arm += object->resident_page_count; 165 } 166 if (object->shadow_count > 1) { 167 /* shared object */ 168 totalp->t_vmshr += object->size; 169 totalp->t_rmshr += object->resident_page_count; 170 if (object->flags & OBJ_ACTIVE) { 171 totalp->t_avmshr += object->size; 172 totalp->t_armshr += object->resident_page_count; 173 } 174 } 175 } 176 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 177 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 178 } 179 180 SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 181 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 182 "System virtual memory statistics"); 183 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 184 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 185 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 186 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 187 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 188 v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 189 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 190 v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 191 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 192 v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 193 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 194 &cnt.v_intr, 0, "Hardware interrupts"); 195 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 196 &cnt.v_soft, 0, "Software interrupts"); 197 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 198 v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 199 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 200 v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 201 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 202 v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 203 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 204 v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 205 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 206 v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 207 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 208 v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 209 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 210 v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 211 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 212 v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 213 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 214 v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 215 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 216 v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 217 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 218 v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 219 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 220 v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 221 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 222 v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 223 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 224 v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 225 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 226 v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 227 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 228 v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 229 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 230 v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 231 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 232 v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 233 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 234 v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 235 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 236 v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 237 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 238 v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 239 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 240 v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 241 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 242 v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 243 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 244 v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 245 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 246 v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 247 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 248 v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 249 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 250 v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 251 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 252 v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 253 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 254 v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 255 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 256 v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 257 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 258 v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 259 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 260 v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 261 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 262 v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 263 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 264 v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 265 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 266 v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 267 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 268 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 269 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 270 v_forks, CTLFLAG_RD, &cnt.v_forks, 0, "Number of fork() calls"); 271 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 272 v_vforks, CTLFLAG_RD, &cnt.v_vforks, 0, "Number of vfork() calls"); 273 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 274 v_rforks, CTLFLAG_RD, &cnt.v_rforks, 0, "Number of rfork() calls"); 275 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 276 v_kthreads, CTLFLAG_RD, &cnt.v_kthreads, 0, "Number of fork() calls by kernel"); 277 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 278 v_forkpages, CTLFLAG_RD, &cnt.v_forkpages, 0, "VM pages affected by fork()"); 279 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 280 v_vforkpages, CTLFLAG_RD, &cnt.v_vforkpages, 0, "VM pages affected by vfork()"); 281 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 282 v_rforkpages, CTLFLAG_RD, &cnt.v_rforkpages, 0, "VM pages affected by rfork()"); 283 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 284 v_kthreadpages, CTLFLAG_RD, &cnt.v_kthreadpages, 0, "VM pages affected by fork() by kernel"); 285 #if 0 286 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 287 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 288 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 289 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 290 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 291 first_page, CTLFLAG_RD, &first_page, 0, ""); 292 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 293 last_page, CTLFLAG_RD, &last_page, 0, ""); 294 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 295 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 296 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 297 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 298 #endif
Cache object: 26faa3a0d5d5740ecc233c3eabac0675
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