vm_meter.c revision 109097
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 109097 2003-01-11 07:29:47Z dillon $ 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#include <sys/smp.h> 47 48#include <vm/vm.h> 49#include <vm/vm_page.h> 50#include <vm/vm_extern.h> 51#include <vm/vm_param.h> 52#include <vm/pmap.h> 53#include <vm/vm_map.h> 54#include <vm/vm_object.h> 55#include <sys/sysctl.h> 56 57struct vmmeter cnt; 58 59int maxslp = MAXSLP; 60 61SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 62 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 63SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 64 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 65SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 66 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 67SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 68 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 69SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 70 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 71SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 72 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 73SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 74 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 75SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 76 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 77 78SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 79 &averunnable, loadavg, "Machine loadaverage history"); 80 81static int 82vmtotal(SYSCTL_HANDLER_ARGS) 83{ 84/* XXXKSE almost completely broken */ 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 struct thread *td; 92 93 totalp = &total; 94 bzero(totalp, sizeof *totalp); 95 /* 96 * Mark all objects as inactive. 97 */ 98 GIANT_REQUIRED; 99 mtx_lock(&vm_object_list_mtx); 100 TAILQ_FOREACH(object, &vm_object_list, object_list) { 101 vm_object_lock(object); 102 vm_object_clear_flag(object, OBJ_ACTIVE); 103 vm_object_unlock(object); 104 } 105 mtx_unlock(&vm_object_list_mtx); 106 /* 107 * Calculate process statistics. 108 */ 109 sx_slock(&allproc_lock); 110 FOREACH_PROC_IN_SYSTEM(p) { 111 if (p->p_flag & P_SYSTEM) 112 continue; 113 mtx_lock_spin(&sched_lock); 114 switch (p->p_state) { 115 case PRS_NEW: 116 mtx_unlock_spin(&sched_lock); 117 continue; 118 break; 119 default: 120 FOREACH_THREAD_IN_PROC(p, td) { 121 /* Need new statistics XXX */ 122 switch (td->td_state) { 123 case TDS_INHIBITED: 124 if (TD_ON_LOCK(td) || 125 (td->td_inhibitors == 126 TDI_SWAPPED)) { 127 totalp->t_sw++; 128 } else if (TD_IS_SLEEPING(td) || 129 TD_AWAITING_INTR(td) || 130 TD_IS_SUSPENDED(td)) { 131 if (td->td_priority <= PZERO) 132 totalp->t_dw++; 133 else 134 totalp->t_sl++; 135 } 136 break; 137 138 case TDS_CAN_RUN: 139 totalp->t_sw++; 140 break; 141 case TDS_RUNQ: 142 case TDS_RUNNING: 143 totalp->t_rq++; 144 continue; 145 default: 146 break; 147 } 148 } 149 } 150 mtx_unlock_spin(&sched_lock); 151 /* 152 * Note active objects. 153 */ 154 paging = 0; 155 map = &p->p_vmspace->vm_map; 156 vm_map_lock_read(map); 157 for (entry = map->header.next; 158 entry != &map->header; entry = entry->next) { 159 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 160 (object = entry->object.vm_object) == NULL) 161 continue; 162 vm_object_lock(object); 163 vm_object_set_flag(object, OBJ_ACTIVE); 164 paging |= object->paging_in_progress; 165 vm_object_unlock(object); 166 } 167 vm_map_unlock_read(map); 168 if (paging) 169 totalp->t_pw++; 170 } 171 sx_sunlock(&allproc_lock); 172 /* 173 * Calculate object memory usage statistics. 174 */ 175 mtx_lock(&vm_object_list_mtx); 176 TAILQ_FOREACH(object, &vm_object_list, object_list) { 177 vm_object_lock(object); 178 /* 179 * devices, like /dev/mem, will badly skew our totals 180 */ 181 if (object->type == OBJT_DEVICE) { 182 vm_object_unlock(object); 183 continue; 184 } 185 totalp->t_vm += object->size; 186 totalp->t_rm += object->resident_page_count; 187 if (object->flags & OBJ_ACTIVE) { 188 totalp->t_avm += object->size; 189 totalp->t_arm += object->resident_page_count; 190 } 191 if (object->shadow_count > 1) { 192 /* shared object */ 193 totalp->t_vmshr += object->size; 194 totalp->t_rmshr += object->resident_page_count; 195 if (object->flags & OBJ_ACTIVE) { 196 totalp->t_avmshr += object->size; 197 totalp->t_armshr += object->resident_page_count; 198 } 199 } 200 vm_object_unlock(object); 201 } 202 mtx_unlock(&vm_object_list_mtx); 203 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 204 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 205} 206 207/* 208 * vcnt() - accumulate statistics from all cpus and the global cnt 209 * structure. 210 * 211 * The vmmeter structure is now per-cpu as well as global. Those 212 * statistics which can be kept on a per-cpu basis (to avoid cache 213 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 214 * statistics, such as v_free_reserved, are left in the global 215 * structure. 216 * 217 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 218 */ 219static int 220vcnt(SYSCTL_HANDLER_ARGS) 221{ 222 int error = 0; 223 int count = *(int *)arg1; 224#ifdef SMP 225 int i; 226 int offset = (char *)arg1 - (char *)&cnt; 227 228 for (i = 0; i < mp_ncpus; ++i) { 229 struct pcpu *pcpu = pcpu_find(i); 230 count += *(int *)((char *)&pcpu->pc_cnt + offset); 231 } 232#else 233 int offset = (char *)arg1 - (char *)&cnt; 234 count += *(int *)((char *)PCPU_PTR(cnt) + offset); 235#endif 236 error = SYSCTL_OUT(req, &count, sizeof(int)); 237 return(error); 238} 239 240SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 241 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 242 "System virtual memory statistics"); 243SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 244SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 245SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 246SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 247 248SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 249 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 250SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 251 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 252SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 253 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 254SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 255 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 256SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 257 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 258SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 259 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 260SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 261 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 262SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 263 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 264SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 265 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 266SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 267 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 268SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 269 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 270SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 271 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 272SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 273 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 274SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 275 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 276SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 277 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 278SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 279 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 280SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 281 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 282SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 283 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 284SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 285 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 286SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 287 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 288SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 289 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 290SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 291 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 292SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 293 &cnt.v_dfree, 0, vcnt, "IU", ""); 294SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 295 &cnt.v_pfree, 0, vcnt, "IU", ""); 296SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 297 &cnt.v_tfree, 0, vcnt, "IU", ""); 298SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD, 299 &cnt.v_page_size, 0, vcnt, "IU", ""); 300SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD, 301 &cnt.v_page_count, 0, vcnt, "IU", ""); 302SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD, 303 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 304SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD, 305 &cnt.v_free_target, 0, vcnt, "IU", ""); 306SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD, 307 &cnt.v_free_min, 0, vcnt, "IU", ""); 308SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD, 309 &cnt.v_free_count, 0, vcnt, "IU", ""); 310SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD, 311 &cnt.v_wire_count, 0, vcnt, "IU", ""); 312SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD, 313 &cnt.v_active_count, 0, vcnt, "IU", ""); 314SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD, 315 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 316SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD, 317 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 318SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD, 319 &cnt.v_cache_count, 0, vcnt, "IU", ""); 320SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD, 321 &cnt.v_cache_min, 0, vcnt, "IU", ""); 322SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD, 323 &cnt.v_cache_max, 0, vcnt, "IU", ""); 324SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD, 325 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 326SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD, 327 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 328SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 329 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 330SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 331 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 332SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 333 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 334SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 335 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 336SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 337 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 338SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 339 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 340SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 341 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 342SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 343 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 344 345SYSCTL_INT(_vm_stats_misc, OID_AUTO, 346 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 347#if 0 348SYSCTL_INT(_vm_stats_misc, OID_AUTO, 349 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 350SYSCTL_INT(_vm_stats_misc, OID_AUTO, 351 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 352SYSCTL_INT(_vm_stats_misc, OID_AUTO, 353 first_page, CTLFLAG_RD, &first_page, 0, ""); 354SYSCTL_INT(_vm_stats_misc, OID_AUTO, 355 last_page, CTLFLAG_RD, &last_page, 0, ""); 356#endif 357