vm_meter.c revision 127961
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: head/sys/vm/vm_meter.c 127961 2004-04-06 20:15:37Z imp $"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/kernel.h> 38#include <sys/lock.h> 39#include <sys/mutex.h> 40#include <sys/proc.h> 41#include <sys/resource.h> 42#include <sys/sx.h> 43#include <sys/vmmeter.h> 44#include <sys/smp.h> 45 46#include <vm/vm.h> 47#include <vm/vm_page.h> 48#include <vm/vm_extern.h> 49#include <vm/vm_param.h> 50#include <vm/pmap.h> 51#include <vm/vm_map.h> 52#include <vm/vm_object.h> 53#include <sys/sysctl.h> 54 55struct vmmeter cnt; 56 57int maxslp = MAXSLP; 58 59SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 60 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 61SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 62 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 63SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 64 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 65SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 66 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 67SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 68 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 69SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 70 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 71SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 72 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 73SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 74 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 75 76SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 77 &averunnable, loadavg, "Machine loadaverage history"); 78 79static int 80vmtotal(SYSCTL_HANDLER_ARGS) 81{ 82/* XXXKSE almost completely broken */ 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 thread *td; 90 91 totalp = &total; 92 bzero(totalp, sizeof *totalp); 93 /* 94 * Mark all objects as inactive. 95 */ 96 GIANT_REQUIRED; 97 mtx_lock(&vm_object_list_mtx); 98 TAILQ_FOREACH(object, &vm_object_list, object_list) { 99 if (!VM_OBJECT_TRYLOCK(object)) { 100 /* 101 * Avoid a lock-order reversal. Consequently, 102 * the reported number of active pages may be 103 * greater than the actual number. 104 */ 105 continue; 106 } 107 vm_object_clear_flag(object, OBJ_ACTIVE); 108 VM_OBJECT_UNLOCK(object); 109 } 110 mtx_unlock(&vm_object_list_mtx); 111 /* 112 * Calculate process statistics. 113 */ 114 sx_slock(&allproc_lock); 115 FOREACH_PROC_IN_SYSTEM(p) { 116 if (p->p_flag & P_SYSTEM) 117 continue; 118 mtx_lock_spin(&sched_lock); 119 switch (p->p_state) { 120 case PRS_NEW: 121 mtx_unlock_spin(&sched_lock); 122 continue; 123 break; 124 default: 125 FOREACH_THREAD_IN_PROC(p, td) { 126 /* Need new statistics XXX */ 127 switch (td->td_state) { 128 case TDS_INHIBITED: 129 if (TD_ON_LOCK(td) || 130 (td->td_inhibitors == 131 TDI_SWAPPED)) { 132 totalp->t_sw++; 133 } else if (TD_IS_SLEEPING(td) || 134 TD_AWAITING_INTR(td) || 135 TD_IS_SUSPENDED(td)) { 136 if (td->td_priority <= PZERO) 137 totalp->t_dw++; 138 else 139 totalp->t_sl++; 140 } 141 break; 142 143 case TDS_CAN_RUN: 144 totalp->t_sw++; 145 break; 146 case TDS_RUNQ: 147 case TDS_RUNNING: 148 totalp->t_rq++; 149 continue; 150 default: 151 break; 152 } 153 } 154 } 155 mtx_unlock_spin(&sched_lock); 156 /* 157 * Note active objects. 158 */ 159 paging = 0; 160 map = &p->p_vmspace->vm_map; 161 vm_map_lock_read(map); 162 for (entry = map->header.next; 163 entry != &map->header; entry = entry->next) { 164 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 165 (object = entry->object.vm_object) == NULL) 166 continue; 167 VM_OBJECT_LOCK(object); 168 vm_object_set_flag(object, OBJ_ACTIVE); 169 paging |= object->paging_in_progress; 170 VM_OBJECT_UNLOCK(object); 171 } 172 vm_map_unlock_read(map); 173 if (paging) 174 totalp->t_pw++; 175 } 176 sx_sunlock(&allproc_lock); 177 /* 178 * Calculate object memory usage statistics. 179 */ 180 mtx_lock(&vm_object_list_mtx); 181 TAILQ_FOREACH(object, &vm_object_list, object_list) { 182 /* 183 * Perform unsynchronized reads on the object to avoid 184 * a lock-order reversal. In this case, the lack of 185 * synchronization should not impair the accuracy of 186 * the reported statistics. 187 */ 188 if (object->type == OBJT_DEVICE) { 189 /* 190 * Devices, like /dev/mem, will badly skew our totals. 191 */ 192 continue; 193 } 194 totalp->t_vm += object->size; 195 totalp->t_rm += object->resident_page_count; 196 if (object->flags & OBJ_ACTIVE) { 197 totalp->t_avm += object->size; 198 totalp->t_arm += object->resident_page_count; 199 } 200 if (object->shadow_count > 1) { 201 /* shared object */ 202 totalp->t_vmshr += object->size; 203 totalp->t_rmshr += object->resident_page_count; 204 if (object->flags & OBJ_ACTIVE) { 205 totalp->t_avmshr += object->size; 206 totalp->t_armshr += object->resident_page_count; 207 } 208 } 209 } 210 mtx_unlock(&vm_object_list_mtx); 211 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 212 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 213} 214 215/* 216 * vcnt() - accumulate statistics from all cpus and the global cnt 217 * structure. 218 * 219 * The vmmeter structure is now per-cpu as well as global. Those 220 * statistics which can be kept on a per-cpu basis (to avoid cache 221 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 222 * statistics, such as v_free_reserved, are left in the global 223 * structure. 224 * 225 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 226 */ 227static int 228vcnt(SYSCTL_HANDLER_ARGS) 229{ 230 int error = 0; 231 int count = *(int *)arg1; 232#ifdef SMP 233 int i; 234 int offset = (char *)arg1 - (char *)&cnt; 235 236 for (i = 0; i < mp_ncpus; ++i) { 237 struct pcpu *pcpu = pcpu_find(i); 238 count += *(int *)((char *)&pcpu->pc_cnt + offset); 239 } 240#else 241 int offset = (char *)arg1 - (char *)&cnt; 242 count += *(int *)((char *)PCPU_PTR(cnt) + offset); 243#endif 244 error = SYSCTL_OUT(req, &count, sizeof(int)); 245 return(error); 246} 247 248SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 249 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 250 "System virtual memory statistics"); 251SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 252SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 253SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 254SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 255 256SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 257 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 258SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 259 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 260SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 261 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 262SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 263 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 264SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 265 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 266SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 267 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 268SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 269 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 270SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 271 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 272SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 273 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 274SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 275 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 276SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 277 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 278SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 279 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 280SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 281 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 282SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 283 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 284SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 285 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 286SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 287 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 288SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 289 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 290SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 291 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 292SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 293 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 294SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 295 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 296SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 297 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 298SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 299 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 300SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 301 &cnt.v_dfree, 0, vcnt, "IU", ""); 302SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 303 &cnt.v_pfree, 0, vcnt, "IU", ""); 304SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 305 &cnt.v_tfree, 0, vcnt, "IU", ""); 306SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD, 307 &cnt.v_page_size, 0, vcnt, "IU", ""); 308SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD, 309 &cnt.v_page_count, 0, vcnt, "IU", ""); 310SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD, 311 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 312SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD, 313 &cnt.v_free_target, 0, vcnt, "IU", ""); 314SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD, 315 &cnt.v_free_min, 0, vcnt, "IU", ""); 316SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD, 317 &cnt.v_free_count, 0, vcnt, "IU", ""); 318SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD, 319 &cnt.v_wire_count, 0, vcnt, "IU", ""); 320SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD, 321 &cnt.v_active_count, 0, vcnt, "IU", ""); 322SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD, 323 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 324SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD, 325 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 326SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD, 327 &cnt.v_cache_count, 0, vcnt, "IU", ""); 328SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD, 329 &cnt.v_cache_min, 0, vcnt, "IU", ""); 330SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD, 331 &cnt.v_cache_max, 0, vcnt, "IU", ""); 332SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD, 333 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 334SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD, 335 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 336SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 337 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 338SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 339 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 340SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 341 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 342SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 343 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 344SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 345 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 346SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 347 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 348SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 349 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 350SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 351 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 352 353SYSCTL_INT(_vm_stats_misc, OID_AUTO, 354 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 355#if 0 356SYSCTL_INT(_vm_stats_misc, OID_AUTO, 357 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 358SYSCTL_INT(_vm_stats_misc, OID_AUTO, 359 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 360SYSCTL_INT(_vm_stats_misc, OID_AUTO, 361 first_page, CTLFLAG_RD, &first_page, 0, ""); 362SYSCTL_INT(_vm_stats_misc, OID_AUTO, 363 last_page, CTLFLAG_RD, &last_page, 0, ""); 364#endif 365