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 * $FreeBSD$ 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 47 #include <vm/vm.h> 48 #include <vm/vm_page.h> 49 #include <vm/vm_extern.h> 50 #include <vm/vm_param.h> 51 #include <vm/pmap.h> 52 #include <vm/vm_map.h> 53 #include <vm/vm_object.h> 54 #include <sys/sysctl.h> 55 56 struct loadavg averunnable = 57 { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ 58 59 struct vmmeter cnt; 60 61 int maxslp = MAXSLP; 62 63 /* 64 * Constants for averages over 1, 5, and 15 minutes 65 * when sampling at 5 second intervals. 66 */ 67 static fixpt_t cexp[3] = { 68 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 69 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 70 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 71 }; 72 73 /* 74 * Compute a tenex style load average of a quantity on 75 * 1, 5 and 15 minute intervals. 76 */ 77 static void 78 loadav(struct loadavg *avg) 79 { 80 register int i, nrun; 81 register struct proc *p; 82 83 sx_slock(&allproc_lock); 84 for (nrun = 0, p = LIST_FIRST(&allproc); p != 0; p = LIST_NEXT(p, p_list)) { 85 switch (p->p_stat) { 86 case SSLEEP: 87 if (p->p_pri.pri_level > PZERO || 88 p->p_slptime != 0) 89 continue; 90 /* FALLTHROUGH */ 91 case SRUN: 92 if ((p->p_flag & P_NOLOAD) != 0) 93 continue; 94 /* FALLTHROUGH */ 95 case SIDL: 96 nrun++; 97 } 98 } 99 sx_sunlock(&allproc_lock); 100 for (i = 0; i < 3; i++) 101 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 102 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 103 } 104 105 void 106 vmmeter() 107 { 108 109 if (time_second % 5 == 0) 110 loadav(&averunnable); 111 } 112 113 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 114 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 115 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 116 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 117 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 118 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 119 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 120 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 121 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 122 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 123 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 124 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 125 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 126 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 127 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 128 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 129 130 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 131 &averunnable, loadavg, "Machine loadaverage history"); 132 133 static int 134 vmtotal(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 mtx_lock(&vm_mtx); 149 TAILQ_FOREACH(object, &vm_object_list, object_list) 150 vm_object_clear_flag(object, OBJ_ACTIVE); 151 mtx_unlock(&vm_mtx); 152 /* 153 * Calculate process statistics. 154 */ 155 sx_slock(&allproc_lock); 156 LIST_FOREACH(p, &allproc, p_list) { 157 if (p->p_flag & P_SYSTEM) 158 continue; 159 mtx_lock_spin(&sched_lock); 160 switch (p->p_stat) { 161 case 0: 162 mtx_unlock_spin(&sched_lock); 163 continue; 164 165 case SMTX: 166 case SSLEEP: 167 case SSTOP: 168 if (p->p_sflag & PS_INMEM) { 169 if (p->p_pri.pri_level <= PZERO) 170 totalp->t_dw++; 171 else if (p->p_slptime < maxslp) 172 totalp->t_sl++; 173 } else if (p->p_slptime < maxslp) 174 totalp->t_sw++; 175 if (p->p_slptime >= maxslp) { 176 mtx_unlock_spin(&sched_lock); 177 continue; 178 } 179 break; 180 181 case SWAIT: 182 totalp->t_sl++; 183 continue; 184 185 case SRUN: 186 case SIDL: 187 if (p->p_sflag & PS_INMEM) 188 totalp->t_rq++; 189 else 190 totalp->t_sw++; 191 if (p->p_stat == SIDL) { 192 mtx_unlock_spin(&sched_lock); 193 continue; 194 } 195 break; 196 } 197 mtx_unlock_spin(&sched_lock); 198 /* 199 * Note active objects. 200 */ 201 paging = 0; 202 mtx_lock(&vm_mtx); 203 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 204 entry != &map->header; entry = entry->next) { 205 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 206 entry->object.vm_object == NULL) 207 continue; 208 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 209 paging |= entry->object.vm_object->paging_in_progress; 210 } 211 mtx_unlock(&vm_mtx); 212 if (paging) 213 totalp->t_pw++; 214 } 215 sx_sunlock(&allproc_lock); 216 /* 217 * Calculate object memory usage statistics. 218 */ 219 mtx_lock(&vm_mtx); 220 TAILQ_FOREACH(object, &vm_object_list, object_list) { 221 /* 222 * devices, like /dev/mem, will badly skew our totals 223 */ 224 if (object->type == OBJT_DEVICE) 225 continue; 226 totalp->t_vm += object->size; 227 totalp->t_rm += object->resident_page_count; 228 if (object->flags & OBJ_ACTIVE) { 229 totalp->t_avm += object->size; 230 totalp->t_arm += object->resident_page_count; 231 } 232 if (object->shadow_count > 1) { 233 /* shared object */ 234 totalp->t_vmshr += object->size; 235 totalp->t_rmshr += object->resident_page_count; 236 if (object->flags & OBJ_ACTIVE) { 237 totalp->t_avmshr += object->size; 238 totalp->t_armshr += object->resident_page_count; 239 } 240 } 241 } 242 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 243 mtx_unlock(&vm_mtx); 244 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 245 } 246 247 SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 248 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 249 "System virtual memory statistics"); 250 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 251 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 252 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 253 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 254 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 255 v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 256 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 257 v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 258 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 259 v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 260 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 261 &cnt.v_intr, 0, "Hardware interrupts"); 262 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 263 &cnt.v_soft, 0, "Software interrupts"); 264 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 265 v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 266 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 267 v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 268 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 269 v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 270 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 271 v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 272 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 273 v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 274 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 275 v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 276 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 277 v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 278 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 279 v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 280 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 281 v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 282 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 283 v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 284 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 285 v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 286 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 287 v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 288 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 289 v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 290 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 291 v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 292 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 293 v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 294 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 295 v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 296 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 297 v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 298 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 299 v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 300 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 301 v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 302 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 303 v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 304 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 305 v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 306 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 307 v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 308 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 309 v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 310 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 311 v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 312 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 313 v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 314 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 315 v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 316 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 317 v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 318 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 319 v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 320 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 321 v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 322 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 323 v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 324 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 325 v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 326 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 327 v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 328 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 329 v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 330 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 331 v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 332 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 333 v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 334 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 335 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 336 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 337 v_forks, CTLFLAG_RD, &cnt.v_forks, 0, "Number of fork() calls"); 338 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 339 v_vforks, CTLFLAG_RD, &cnt.v_vforks, 0, "Number of vfork() calls"); 340 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 341 v_rforks, CTLFLAG_RD, &cnt.v_rforks, 0, "Number of rfork() calls"); 342 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 343 v_kthreads, CTLFLAG_RD, &cnt.v_kthreads, 0, "Number of fork() calls by kernel"); 344 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 345 v_forkpages, CTLFLAG_RD, &cnt.v_forkpages, 0, "VM pages affected by fork()"); 346 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 347 v_vforkpages, CTLFLAG_RD, &cnt.v_vforkpages, 0, "VM pages affected by vfork()"); 348 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 349 v_rforkpages, CTLFLAG_RD, &cnt.v_rforkpages, 0, "VM pages affected by rfork()"); 350 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 351 v_kthreadpages, CTLFLAG_RD, &cnt.v_kthreadpages, 0, "VM pages affected by fork() by kernel"); 352 #if 0 353 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 354 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 355 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 356 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 357 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 358 first_page, CTLFLAG_RD, &first_page, 0, ""); 359 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 360 last_page, CTLFLAG_RD, &last_page, 0, ""); 361 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 362 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 363 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 364 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 365 #endif 366