vm_meter.c revision 74670
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 74670 2001-03-23 03:45:17Z tmm $ 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 54struct loadavg averunnable = 55 { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ 56 57struct vmmeter cnt; 58 59static int maxslp = MAXSLP; 60 61/* 62 * Constants for averages over 1, 5, and 15 minutes 63 * when sampling at 5 second intervals. 64 */ 65static fixpt_t cexp[3] = { 66 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 67 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 68 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 69}; 70 71/* 72 * Compute a tenex style load average of a quantity on 73 * 1, 5 and 15 minute intervals. 74 */ 75static void 76loadav(struct loadavg *avg) 77{ 78 register int i, nrun; 79 register struct proc *p; 80 81 ALLPROC_LOCK(AP_SHARED); 82 for (nrun = 0, p = LIST_FIRST(&allproc); p != 0; p = LIST_NEXT(p, p_list)) { 83 switch (p->p_stat) { 84 case SSLEEP: 85 if (p->p_pri.pri_level > PZERO || 86 p->p_slptime != 0) 87 continue; 88 /* FALLTHROUGH */ 89 case SRUN: 90 if ((p->p_flag & P_NOLOAD) != 0) 91 continue; 92 /* FALLTHROUGH */ 93 case SIDL: 94 nrun++; 95 } 96 } 97 ALLPROC_LOCK(AP_RELEASE); 98 for (i = 0; i < 3; i++) 99 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 100 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 101} 102 103void 104vmmeter() 105{ 106 107 if (time_second % 5 == 0) 108 loadav(&averunnable); 109 if (proc0.p_slptime > maxslp / 2) 110 wakeup(&proc0); 111} 112 113SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 114 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 115SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 116 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 117SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 118 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 119SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 120 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 121SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 122 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 123SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 124 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 125SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 126 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 127SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 128 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 129 130SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 131 &averunnable, loadavg, "Machine loadaverage history"); 132 133static int 134vmtotal(SYSCTL_HANDLER_ARGS) 135{ 136 struct proc *p; 137 struct vmtotal total, *totalp; 138 vm_map_entry_t entry; 139 vm_object_t object; 140 vm_map_t map; 141 int paging; 142 143 totalp = &total; 144 bzero(totalp, sizeof *totalp); 145 /* 146 * Mark all objects as inactive. 147 */ 148 TAILQ_FOREACH(object, &vm_object_list, object_list) 149 vm_object_clear_flag(object, OBJ_ACTIVE); 150 /* 151 * Calculate process statistics. 152 */ 153 ALLPROC_LOCK(AP_SHARED); 154 LIST_FOREACH(p, &allproc, p_list) { 155 if (p->p_flag & P_SYSTEM) 156 continue; 157 mtx_lock_spin(&sched_lock); 158 switch (p->p_stat) { 159 case 0: 160 mtx_unlock_spin(&sched_lock); 161 continue; 162 163 case SMTX: 164 case SSLEEP: 165 case SSTOP: 166 if (p->p_sflag & PS_INMEM) { 167 if (p->p_pri.pri_level <= PZERO) 168 totalp->t_dw++; 169 else if (p->p_slptime < maxslp) 170 totalp->t_sl++; 171 } else if (p->p_slptime < maxslp) 172 totalp->t_sw++; 173 if (p->p_slptime >= maxslp) { 174 mtx_unlock_spin(&sched_lock); 175 continue; 176 } 177 break; 178 179 case SWAIT: 180 totalp->t_sl++; 181 continue; 182 183 case SRUN: 184 case SIDL: 185 if (p->p_sflag & PS_INMEM) 186 totalp->t_rq++; 187 else 188 totalp->t_sw++; 189 if (p->p_stat == SIDL) { 190 mtx_unlock_spin(&sched_lock); 191 continue; 192 } 193 break; 194 } 195 mtx_unlock_spin(&sched_lock); 196 /* 197 * Note active objects. 198 */ 199 paging = 0; 200 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 201 entry != &map->header; entry = entry->next) { 202 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 203 entry->object.vm_object == NULL) 204 continue; 205 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 206 paging |= entry->object.vm_object->paging_in_progress; 207 } 208 if (paging) 209 totalp->t_pw++; 210 } 211 ALLPROC_LOCK(AP_RELEASE); 212 /* 213 * Calculate object memory usage statistics. 214 */ 215 for (object = TAILQ_FIRST(&vm_object_list); 216 object != NULL; 217 object = TAILQ_NEXT(object, object_list)) { 218 /* 219 * devices, like /dev/mem, will badly skew our totals 220 */ 221 if (object->type == OBJT_DEVICE) 222 continue; 223 totalp->t_vm += object->size; 224 totalp->t_rm += object->resident_page_count; 225 if (object->flags & OBJ_ACTIVE) { 226 totalp->t_avm += object->size; 227 totalp->t_arm += object->resident_page_count; 228 } 229 if (object->shadow_count > 1) { 230 /* shared object */ 231 totalp->t_vmshr += object->size; 232 totalp->t_rmshr += object->resident_page_count; 233 if (object->flags & OBJ_ACTIVE) { 234 totalp->t_avmshr += object->size; 235 totalp->t_armshr += object->resident_page_count; 236 } 237 } 238 } 239 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 240 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 241} 242 243SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 244 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 245 "System virtual memory statistics"); 246SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 247SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 248SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 249SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 250SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 251 v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 252SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 253 v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 254SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 255 v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 256SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 257 &cnt.v_intr, 0, "Hardware interrupts"); 258SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 259 &cnt.v_soft, 0, "Software interrupts"); 260SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 261 v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 262SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 263 v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 264SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 265 v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 266SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 267 v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 268SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 269 v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 270SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 271 v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 272SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 273 v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 274SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 275 v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 276SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 277 v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 278SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 279 v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 280SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 281 v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 282SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 283 v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 284SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 285 v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 286SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 287 v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 288SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 289 v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 290SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 291 v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 292SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 293 v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 294SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 295 v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 296SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 297 v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 298SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 299 v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 300SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 301 v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 302SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 303 v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 304SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 305 v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 306SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 307 v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 308SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 309 v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 310SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 311 v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 312SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 313 v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 314SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 315 v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 316SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 317 v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 318SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 319 v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 320SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 321 v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 322SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 323 v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 324SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 325 v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 326SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 327 v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 328SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 329 v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 330SYSCTL_INT(_vm_stats_misc, OID_AUTO, 331 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 332SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 333 v_forks, CTLFLAG_RD, &cnt.v_forks, 0, "Number of fork() calls"); 334SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 335 v_vforks, CTLFLAG_RD, &cnt.v_vforks, 0, "Number of vfork() calls"); 336SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 337 v_rforks, CTLFLAG_RD, &cnt.v_rforks, 0, "Number of rfork() calls"); 338SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 339 v_kthreads, CTLFLAG_RD, &cnt.v_kthreads, 0, "Number of fork() calls by kernel"); 340SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 341 v_forkpages, CTLFLAG_RD, &cnt.v_forkpages, 0, "VM pages affected by fork()"); 342SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 343 v_vforkpages, CTLFLAG_RD, &cnt.v_vforkpages, 0, "VM pages affected by vfork()"); 344SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 345 v_rforkpages, CTLFLAG_RD, &cnt.v_rforkpages, 0, "VM pages affected by rfork()"); 346SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 347 v_kthreadpages, CTLFLAG_RD, &cnt.v_kthreadpages, 0, "VM pages affected by fork() by kernel"); 348#if 0 349SYSCTL_INT(_vm_stats_misc, OID_AUTO, 350 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 351SYSCTL_INT(_vm_stats_misc, OID_AUTO, 352 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 353SYSCTL_INT(_vm_stats_misc, OID_AUTO, 354 first_page, CTLFLAG_RD, &first_page, 0, ""); 355SYSCTL_INT(_vm_stats_misc, OID_AUTO, 356 last_page, CTLFLAG_RD, &last_page, 0, ""); 357SYSCTL_INT(_vm_stats_misc, OID_AUTO, 358 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 359SYSCTL_INT(_vm_stats_misc, OID_AUTO, 360 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 361#endif 362 363/* 364 * Further sysctls used by systat: hw.nintr, hw.intrnames, hw.intrcnt. 365 * This does probably not really fit in here, but it is somehow connected. 366 * The definitions for this are machdep, but are currently defined for 367 * any architecture. 368 */ 369 370/* include the machdep stuff */ 371#include <machine/intrcnt.h> 372 373int nintr = INTRCNT_COUNT; 374SYSCTL_INT(_hw, OID_AUTO, nintr, CTLFLAG_RD, &nintr, 0, "Number of Interrupts"); 375 376SYSCTL_OPAQUE(_hw, OID_AUTO, intrcnt, CTLFLAG_RD, &intrcnt, 377 sizeof(long) * INTRCNT_COUNT, "", "Interrupt Counts"); 378 379/* 380 * We do not know the length in advance (in an MI fashion), so calculate things 381 * at run-time. 382 */ 383static int 384sysctl_intrnames(SYSCTL_HANDLER_ARGS) 385{ 386 return sysctl_handle_opaque(oidp, intrnames, eintrnames - intrnames, 387 req); 388} 389 390SYSCTL_PROC(_hw, OID_AUTO, intrnames, CTLTYPE_OPAQUE | CTLFLAG_RD, NULL, 0, 391 sysctl_intrnames, "", "Interrupt Names"); 392