1139825Simp/*- 21541Srgrimes * Copyright (c) 1982, 1986, 1989, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * Redistribution and use in source and binary forms, with or without 61541Srgrimes * modification, are permitted provided that the following conditions 71541Srgrimes * are met: 81541Srgrimes * 1. Redistributions of source code must retain the above copyright 91541Srgrimes * notice, this list of conditions and the following disclaimer. 101541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111541Srgrimes * notice, this list of conditions and the following disclaimer in the 121541Srgrimes * documentation and/or other materials provided with the distribution. 131541Srgrimes * 4. Neither the name of the University nor the names of its contributors 141541Srgrimes * may be used to endorse or promote products derived from this software 151541Srgrimes * without specific prior written permission. 161541Srgrimes * 171541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271541Srgrimes * SUCH DAMAGE. 281541Srgrimes * 291541Srgrimes * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 301541Srgrimes */ 311541Srgrimes 32116226Sobrien#include <sys/cdefs.h> 33116226Sobrien__FBSDID("$FreeBSD$"); 34116226Sobrien 351541Srgrimes#include <sys/param.h> 361541Srgrimes#include <sys/systm.h> 371541Srgrimes#include <sys/kernel.h> 3876166Smarkm#include <sys/lock.h> 3976166Smarkm#include <sys/mutex.h> 4076166Smarkm#include <sys/proc.h> 4134924Sbde#include <sys/resource.h> 42248084Sattilio#include <sys/rwlock.h> 4374927Sjhb#include <sys/sx.h> 4412662Sdg#include <sys/vmmeter.h> 4593823Sdillon#include <sys/smp.h> 4612662Sdg 471541Srgrimes#include <vm/vm.h> 4840794Speter#include <vm/vm_page.h> 4912726Sbde#include <vm/vm_extern.h> 5012662Sdg#include <vm/vm_param.h> 5112662Sdg#include <vm/pmap.h> 5212662Sdg#include <vm/vm_map.h> 5312662Sdg#include <vm/vm_object.h> 541541Srgrimes#include <sys/sysctl.h> 551541Srgrimes 56170170Sattiliostruct vmmeter cnt; 571541Srgrimes 5862622SjhbSYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 59228449Seadler CTLFLAG_RW, &cnt.v_free_min, 0, "Minimum low-free-pages threshold"); 6062622SjhbSYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 61228449Seadler CTLFLAG_RW, &cnt.v_free_target, 0, "Desired free pages"); 6262622SjhbSYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 63228449Seadler CTLFLAG_RW, &cnt.v_free_reserved, 0, "Pages reserved for deadlock"); 6462622SjhbSYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 65228449Seadler CTLFLAG_RW, &cnt.v_inactive_target, 0, "Pages desired inactive"); 6662622SjhbSYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 67228449Seadler CTLFLAG_RW, &cnt.v_cache_min, 0, "Min pages on cache queue"); 6862622SjhbSYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 69228449Seadler CTLFLAG_RW, &cnt.v_cache_max, 0, "Max pages on cache queue"); 7062622SjhbSYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 71228449Seadler CTLFLAG_RW, &cnt.v_pageout_free_min, 0, "Min pages reserved for kernel"); 7262622SjhbSYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 73228449Seadler CTLFLAG_RW, &cnt.v_free_severe, 0, "Severe page depletion point"); 7412286Sphk 75136404Speterstatic int 76136404Spetersysctl_vm_loadavg(SYSCTL_HANDLER_ARGS) 77136404Speter{ 78181887Sjulian 79136404Speter#ifdef SCTL_MASK32 80136404Speter u_int32_t la[4]; 811541Srgrimes 82136404Speter if (req->flags & SCTL_MASK32) { 83136404Speter la[0] = averunnable.ldavg[0]; 84136404Speter la[1] = averunnable.ldavg[1]; 85136404Speter la[2] = averunnable.ldavg[2]; 86136404Speter la[3] = averunnable.fscale; 87136404Speter return SYSCTL_OUT(req, la, sizeof(la)); 88136404Speter } else 89136404Speter#endif 90136404Speter return SYSCTL_OUT(req, &averunnable, sizeof(averunnable)); 91136404Speter} 92187658SjhbSYSCTL_PROC(_vm, VM_LOADAVG, loadavg, CTLTYPE_STRUCT | CTLFLAG_RD | 93187658Sjhb CTLFLAG_MPSAFE, NULL, 0, sysctl_vm_loadavg, "S,loadavg", 94187658Sjhb "Machine loadaverage history"); 95136404Speter 9612286Sphkstatic int 9762573Sphkvmtotal(SYSCTL_HANDLER_ARGS) 981541Srgrimes{ 9912286Sphk struct proc *p; 100164437Sru struct vmtotal total; 10112286Sphk vm_map_entry_t entry; 10212286Sphk vm_object_t object; 10312286Sphk vm_map_t map; 1041541Srgrimes int paging; 10599072Sjulian struct thread *td; 106159054Stegge struct vmspace *vm; 1071541Srgrimes 108164437Sru bzero(&total, sizeof(total)); 1091541Srgrimes /* 1101541Srgrimes * Mark all objects as inactive. 1111541Srgrimes */ 11295112Salc mtx_lock(&vm_object_list_mtx); 113108551Salc TAILQ_FOREACH(object, &vm_object_list, object_list) { 114248084Sattilio if (!VM_OBJECT_TRYWLOCK(object)) { 115124083Salc /* 116124083Salc * Avoid a lock-order reversal. Consequently, 117124083Salc * the reported number of active pages may be 118124083Salc * greater than the actual number. 119124083Salc */ 120124083Salc continue; 121124083Salc } 12238517Sdfr vm_object_clear_flag(object, OBJ_ACTIVE); 123248084Sattilio VM_OBJECT_WUNLOCK(object); 124108551Salc } 12595112Salc mtx_unlock(&vm_object_list_mtx); 1261541Srgrimes /* 1271541Srgrimes * Calculate process statistics. 1281541Srgrimes */ 12974927Sjhb sx_slock(&allproc_lock); 13083366Sjulian FOREACH_PROC_IN_SYSTEM(p) { 1311541Srgrimes if (p->p_flag & P_SYSTEM) 1321541Srgrimes continue; 133177368Sjeff PROC_LOCK(p); 13499072Sjulian switch (p->p_state) { 13599072Sjulian case PRS_NEW: 136177368Sjeff PROC_UNLOCK(p); 1371541Srgrimes continue; 1381541Srgrimes break; 13999072Sjulian default: 14099072Sjulian FOREACH_THREAD_IN_PROC(p, td) { 141170307Sjeff thread_lock(td); 14299072Sjulian switch (td->td_state) { 143103216Sjulian case TDS_INHIBITED: 144177085Sjeff if (TD_IS_SWAPPED(td)) 145164437Sru total.t_sw++; 146177085Sjeff else if (TD_IS_SLEEPING(td) && 147177085Sjeff td->td_priority <= PZERO) 148177085Sjeff total.t_dw++; 149177085Sjeff else 150177085Sjeff total.t_sl++; 15199072Sjulian break; 1521541Srgrimes 153103216Sjulian case TDS_CAN_RUN: 154164437Sru total.t_sw++; 155103216Sjulian break; 15699072Sjulian case TDS_RUNQ: 15799072Sjulian case TDS_RUNNING: 158164437Sru total.t_rq++; 159170307Sjeff thread_unlock(td); 16099072Sjulian continue; 16199072Sjulian default: 16299072Sjulian break; 16399072Sjulian } 164170307Sjeff thread_unlock(td); 16571572Sjhb } 1661541Srgrimes } 167177368Sjeff PROC_UNLOCK(p); 1681541Srgrimes /* 1691541Srgrimes * Note active objects. 1701541Srgrimes */ 1711541Srgrimes paging = 0; 172159054Stegge vm = vmspace_acquire_ref(p); 173159054Stegge if (vm == NULL) 174159054Stegge continue; 175159054Stegge map = &vm->vm_map; 176108585Salc vm_map_lock_read(map); 177108585Salc for (entry = map->header.next; 1785455Sdg entry != &map->header; entry = entry->next) { 17943748Sdillon if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 180108585Salc (object = entry->object.vm_object) == NULL) 1811541Srgrimes continue; 182248084Sattilio VM_OBJECT_WLOCK(object); 183108585Salc vm_object_set_flag(object, OBJ_ACTIVE); 184108585Salc paging |= object->paging_in_progress; 185248084Sattilio VM_OBJECT_WUNLOCK(object); 1861541Srgrimes } 187108585Salc vm_map_unlock_read(map); 188159054Stegge vmspace_free(vm); 1891541Srgrimes if (paging) 190164437Sru total.t_pw++; 1911541Srgrimes } 19274927Sjhb sx_sunlock(&allproc_lock); 1931541Srgrimes /* 1941541Srgrimes * Calculate object memory usage statistics. 1951541Srgrimes */ 19695112Salc mtx_lock(&vm_object_list_mtx); 19775523Salfred TAILQ_FOREACH(object, &vm_object_list, object_list) { 19842957Sdillon /* 199124083Salc * Perform unsynchronized reads on the object to avoid 200124083Salc * a lock-order reversal. In this case, the lack of 201124083Salc * synchronization should not impair the accuracy of 202124083Salc * the reported statistics. 20342957Sdillon */ 204244043Salc if ((object->flags & OBJ_FICTITIOUS) != 0) { 205124083Salc /* 206124083Salc * Devices, like /dev/mem, will badly skew our totals. 207124083Salc */ 20842957Sdillon continue; 209108585Salc } 210164429Sru if (object->ref_count == 0) { 211164429Sru /* 212164429Sru * Also skip unreferenced objects, including 213164429Sru * vnodes representing mounted file systems. 214164429Sru */ 215164429Sru continue; 216164429Sru } 217164437Sru total.t_vm += object->size; 218164437Sru total.t_rm += object->resident_page_count; 2191541Srgrimes if (object->flags & OBJ_ACTIVE) { 220164437Sru total.t_avm += object->size; 221164437Sru total.t_arm += object->resident_page_count; 2221541Srgrimes } 22318169Sdyson if (object->shadow_count > 1) { 2241541Srgrimes /* shared object */ 225164437Sru total.t_vmshr += object->size; 226164437Sru total.t_rmshr += object->resident_page_count; 2271541Srgrimes if (object->flags & OBJ_ACTIVE) { 228164437Sru total.t_avmshr += object->size; 229164437Sru total.t_armshr += object->resident_page_count; 2301541Srgrimes } 2311541Srgrimes } 2321541Srgrimes } 23395112Salc mtx_unlock(&vm_object_list_mtx); 234170170Sattilio total.t_free = cnt.v_free_count + cnt.v_cache_count; 235164437Sru return (sysctl_handle_opaque(oidp, &total, sizeof(total), req)); 2361541Srgrimes} 23712286Sphk 23893823Sdillon/* 23993823Sdillon * vcnt() - accumulate statistics from all cpus and the global cnt 24093823Sdillon * structure. 24193823Sdillon * 24293823Sdillon * The vmmeter structure is now per-cpu as well as global. Those 24393823Sdillon * statistics which can be kept on a per-cpu basis (to avoid cache 24493823Sdillon * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 24593823Sdillon * statistics, such as v_free_reserved, are left in the global 24693823Sdillon * structure. 24793823Sdillon * 24893823Sdillon * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 24993823Sdillon */ 25093823Sdillonstatic int 25193823Sdillonvcnt(SYSCTL_HANDLER_ARGS) 25293823Sdillon{ 25393823Sdillon int count = *(int *)arg1; 254170170Sattilio int offset = (char *)arg1 - (char *)&cnt; 25593823Sdillon int i; 25693823Sdillon 257218592Sjmallett CPU_FOREACH(i) { 25893823Sdillon struct pcpu *pcpu = pcpu_find(i); 25993823Sdillon count += *(int *)((char *)&pcpu->pc_cnt + offset); 26093823Sdillon } 261144970Sjhb return (SYSCTL_OUT(req, &count, sizeof(int))); 26293823Sdillon} 26393823Sdillon 264187658SjhbSYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE, 26546381Sbillf 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 26646381Sbillf "System virtual memory statistics"); 267141696SphkSYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 268141630Sphkstatic SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, 269141630Sphk "VM meter sys stats"); 270141630Sphkstatic SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, 271141630Sphk "VM meter vm stats"); 27240794SpeterSYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 27393823Sdillon 274228498Seadler#define VM_STATS(parent, var, descr) \ 275228498Seadler SYSCTL_PROC(parent, OID_AUTO, var, \ 276228498Seadler CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_MPSAFE, &cnt.var, 0, vcnt, \ 277228498Seadler "IU", descr) 278228498Seadler#define VM_STATS_VM(var, descr) VM_STATS(_vm_stats_vm, var, descr) 279228498Seadler#define VM_STATS_SYS(var, descr) VM_STATS(_vm_stats_sys, var, descr) 28093823Sdillon 281228449SeadlerVM_STATS_SYS(v_swtch, "Context switches"); 282228449SeadlerVM_STATS_SYS(v_trap, "Traps"); 283228449SeadlerVM_STATS_SYS(v_syscall, "System calls"); 284228449SeadlerVM_STATS_SYS(v_intr, "Device interrupts"); 285228449SeadlerVM_STATS_SYS(v_soft, "Software interrupts"); 286228498SeadlerVM_STATS_VM(v_vm_faults, "Address memory faults"); 287246032SzontVM_STATS_VM(v_io_faults, "Page faults requiring I/O"); 288228498SeadlerVM_STATS_VM(v_cow_faults, "Copy-on-write faults"); 289228498SeadlerVM_STATS_VM(v_cow_optim, "Optimized COW faults"); 290228498SeadlerVM_STATS_VM(v_zfod, "Pages zero-filled on demand"); 291228498SeadlerVM_STATS_VM(v_ozfod, "Optimized zero fill pages"); 292228498SeadlerVM_STATS_VM(v_swapin, "Swap pager pageins"); 293228498SeadlerVM_STATS_VM(v_swapout, "Swap pager pageouts"); 294228498SeadlerVM_STATS_VM(v_swappgsin, "Swap pages swapped in"); 295228498SeadlerVM_STATS_VM(v_swappgsout, "Swap pages swapped out"); 296228498SeadlerVM_STATS_VM(v_vnodein, "Vnode pager pageins"); 297228498SeadlerVM_STATS_VM(v_vnodeout, "Vnode pager pageouts"); 298228498SeadlerVM_STATS_VM(v_vnodepgsin, "Vnode pages paged in"); 299228498SeadlerVM_STATS_VM(v_vnodepgsout, "Vnode pages paged out"); 300228498SeadlerVM_STATS_VM(v_intrans, "In transit page faults"); 301228498SeadlerVM_STATS_VM(v_reactivated, "Pages reactivated from free list"); 302228498SeadlerVM_STATS_VM(v_pdwakeups, "Pagedaemon wakeups"); 303228498SeadlerVM_STATS_VM(v_pdpages, "Pages analyzed by pagedaemon"); 304228498SeadlerVM_STATS_VM(v_tcached, "Total pages cached"); 305228498SeadlerVM_STATS_VM(v_dfree, "Pages freed by pagedaemon"); 306228498SeadlerVM_STATS_VM(v_pfree, "Pages freed by exiting processes"); 307228498SeadlerVM_STATS_VM(v_tfree, "Total pages freed"); 308228498SeadlerVM_STATS_VM(v_page_size, "Page size in bytes"); 309228498SeadlerVM_STATS_VM(v_page_count, "Total number of pages in system"); 310228498SeadlerVM_STATS_VM(v_free_reserved, "Pages reserved for deadlock"); 311228498SeadlerVM_STATS_VM(v_free_target, "Pages desired free"); 312228498SeadlerVM_STATS_VM(v_free_min, "Minimum low-free-pages threshold"); 313228498SeadlerVM_STATS_VM(v_free_count, "Free pages"); 314228498SeadlerVM_STATS_VM(v_wire_count, "Wired pages"); 315228498SeadlerVM_STATS_VM(v_active_count, "Active pages"); 316228498SeadlerVM_STATS_VM(v_inactive_target, "Desired inactive pages"); 317228498SeadlerVM_STATS_VM(v_inactive_count, "Inactive pages"); 318228498SeadlerVM_STATS_VM(v_cache_count, "Pages on cache queue"); 319228498SeadlerVM_STATS_VM(v_cache_min, "Min pages on cache queue"); 320228498SeadlerVM_STATS_VM(v_cache_max, "Max pages on cached queue"); 321228498SeadlerVM_STATS_VM(v_pageout_free_min, "Min pages reserved for kernel"); 322228498SeadlerVM_STATS_VM(v_interrupt_free_min, "Reserved pages for interrupt code"); 323228498SeadlerVM_STATS_VM(v_forks, "Number of fork() calls"); 324228498SeadlerVM_STATS_VM(v_vforks, "Number of vfork() calls"); 325228498SeadlerVM_STATS_VM(v_rforks, "Number of rfork() calls"); 326228498SeadlerVM_STATS_VM(v_kthreads, "Number of fork() calls by kernel"); 327228498SeadlerVM_STATS_VM(v_forkpages, "VM pages affected by fork()"); 328228498SeadlerVM_STATS_VM(v_vforkpages, "VM pages affected by vfork()"); 329228498SeadlerVM_STATS_VM(v_rforkpages, "VM pages affected by rfork()"); 330228498SeadlerVM_STATS_VM(v_kthreadpages, "VM pages affected by fork() by kernel"); 331228449Seadler 332228449SeadlerSYSCTL_INT(_vm_stats_misc, OID_AUTO, zero_page_count, CTLFLAG_RD, 333228449Seadler &vm_page_zero_count, 0, "Number of zero-ed free pages"); 334