vm_meter.c revision 95112
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 95112 2002-04-20 07:23:22Z alc $ 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 struct proc *p; 85 struct vmtotal total, *totalp; 86 vm_map_entry_t entry; 87 vm_object_t object; 88 vm_map_t map; 89 int paging; 90 struct ksegrp *kg; 91 92 totalp = &total; 93 bzero(totalp, sizeof *totalp); 94 /* 95 * Mark all objects as inactive. 96 */ 97 GIANT_REQUIRED; 98 mtx_lock(&vm_object_list_mtx); 99 TAILQ_FOREACH(object, &vm_object_list, object_list) 100 vm_object_clear_flag(object, OBJ_ACTIVE); 101 mtx_unlock(&vm_object_list_mtx); 102 /* 103 * Calculate process statistics. 104 */ 105 sx_slock(&allproc_lock); 106 FOREACH_PROC_IN_SYSTEM(p) { 107 if (p->p_flag & P_SYSTEM) 108 continue; 109 mtx_lock_spin(&sched_lock); 110 switch (p->p_stat) { 111 case 0: 112 mtx_unlock_spin(&sched_lock); 113 continue; 114 115 case SMTX: 116 case SSLEEP: 117 case SSTOP: 118 kg = &p->p_ksegrp; /* XXXKSE */ 119 if (p->p_sflag & PS_INMEM) { 120 if (FIRST_THREAD_IN_PROC(p)->td_priority 121 <= PZERO) 122 totalp->t_dw++; 123 else if (kg->kg_slptime < maxslp) 124 totalp->t_sl++; 125 } else if (kg->kg_slptime < maxslp) 126 totalp->t_sw++; 127 if (kg->kg_slptime >= maxslp) { 128 mtx_unlock_spin(&sched_lock); 129 continue; 130 } 131 break; 132 133 case SWAIT: 134 totalp->t_sl++; 135 continue; 136 137 case SRUN: 138 case SIDL: 139 if (p->p_sflag & PS_INMEM) 140 totalp->t_rq++; 141 else 142 totalp->t_sw++; 143 if (p->p_stat == SIDL) { 144 mtx_unlock_spin(&sched_lock); 145 continue; 146 } 147 break; 148 } 149 mtx_unlock_spin(&sched_lock); 150 /* 151 * Note active objects. 152 */ 153 paging = 0; 154 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 155 entry != &map->header; entry = entry->next) { 156 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 157 entry->object.vm_object == NULL) 158 continue; 159 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 160 paging |= entry->object.vm_object->paging_in_progress; 161 } 162 if (paging) 163 totalp->t_pw++; 164 } 165 sx_sunlock(&allproc_lock); 166 /* 167 * Calculate object memory usage statistics. 168 */ 169 mtx_lock(&vm_object_list_mtx); 170 TAILQ_FOREACH(object, &vm_object_list, object_list) { 171 /* 172 * devices, like /dev/mem, will badly skew our totals 173 */ 174 if (object->type == OBJT_DEVICE) 175 continue; 176 totalp->t_vm += object->size; 177 totalp->t_rm += object->resident_page_count; 178 if (object->flags & OBJ_ACTIVE) { 179 totalp->t_avm += object->size; 180 totalp->t_arm += object->resident_page_count; 181 } 182 if (object->shadow_count > 1) { 183 /* shared object */ 184 totalp->t_vmshr += object->size; 185 totalp->t_rmshr += object->resident_page_count; 186 if (object->flags & OBJ_ACTIVE) { 187 totalp->t_avmshr += object->size; 188 totalp->t_armshr += object->resident_page_count; 189 } 190 } 191 } 192 mtx_unlock(&vm_object_list_mtx); 193 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 194 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 195} 196 197/* 198 * vcnt() - accumulate statistics from all cpus and the global cnt 199 * structure. 200 * 201 * The vmmeter structure is now per-cpu as well as global. Those 202 * statistics which can be kept on a per-cpu basis (to avoid cache 203 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 204 * statistics, such as v_free_reserved, are left in the global 205 * structure. 206 * 207 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 208 */ 209static int 210vcnt(SYSCTL_HANDLER_ARGS) 211{ 212 int error = 0; 213 int count = *(int *)arg1; 214#ifdef SMP 215 int i; 216 int offset = (char *)arg1 - (char *)&cnt; 217 218 for (i = 0; i < mp_ncpus; ++i) { 219 struct pcpu *pcpu = pcpu_find(i); 220 count += *(int *)((char *)&pcpu->pc_cnt + offset); 221 } 222#endif 223 error = SYSCTL_OUT(req, &count, sizeof(int)); 224 return(error); 225} 226 227SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 228 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 229 "System virtual memory statistics"); 230SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 231SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 232SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 233SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 234 235SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 236 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 237SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 238 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 239SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 240 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 241SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 242 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 243SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 244 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 245SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 246 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 247SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 248 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 249SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 250 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 251SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 252 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 253SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 254 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 255SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 256 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 257SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 258 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 259SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 260 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 261SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 262 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 263SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 264 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 265SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 266 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 267SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 268 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 269SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 270 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 271SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 272 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 273SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 274 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 275SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 276 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 277SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 278 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 279SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 280 &cnt.v_dfree, 0, vcnt, "IU", ""); 281SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 282 &cnt.v_pfree, 0, vcnt, "IU", ""); 283SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 284 &cnt.v_tfree, 0, vcnt, "IU", ""); 285SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD, 286 &cnt.v_page_size, 0, vcnt, "IU", ""); 287SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD, 288 &cnt.v_page_count, 0, vcnt, "IU", ""); 289SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD, 290 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 291SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD, 292 &cnt.v_free_target, 0, vcnt, "IU", ""); 293SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD, 294 &cnt.v_free_min, 0, vcnt, "IU", ""); 295SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD, 296 &cnt.v_free_count, 0, vcnt, "IU", ""); 297SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD, 298 &cnt.v_wire_count, 0, vcnt, "IU", ""); 299SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD, 300 &cnt.v_active_count, 0, vcnt, "IU", ""); 301SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD, 302 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 303SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD, 304 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 305SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD, 306 &cnt.v_cache_count, 0, vcnt, "IU", ""); 307SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD, 308 &cnt.v_cache_min, 0, vcnt, "IU", ""); 309SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD, 310 &cnt.v_cache_max, 0, vcnt, "IU", ""); 311SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD, 312 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 313SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD, 314 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 315SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 316 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 317SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 318 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 319SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 320 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 321SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 322 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 323SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 324 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 325SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 326 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 327SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 328 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 329SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 330 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 331 332SYSCTL_INT(_vm_stats_misc, OID_AUTO, 333 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 334#if 0 335SYSCTL_INT(_vm_stats_misc, OID_AUTO, 336 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 337SYSCTL_INT(_vm_stats_misc, OID_AUTO, 338 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 339SYSCTL_INT(_vm_stats_misc, OID_AUTO, 340 first_page, CTLFLAG_RD, &first_page, 0, ""); 341SYSCTL_INT(_vm_stats_misc, OID_AUTO, 342 last_page, CTLFLAG_RD, &last_page, 0, ""); 343SYSCTL_INT(_vm_stats_misc, OID_AUTO, 344 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 345SYSCTL_INT(_vm_stats_misc, OID_AUTO, 346 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 347#endif 348