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 * XXXKSE Needs complete rewrite when correct info is available. 77 * Completely Bogus.. only works with 1:1 (but compiles ok now :-) 78 */ 79 static void 80 loadav(struct loadavg *avg) 81 { 82 int i, nrun; 83 struct proc *p; 84 struct ksegrp *kg; 85 86 sx_slock(&allproc_lock); 87 nrun = 0; 88 FOREACH_PROC_IN_SYSTEM(p) { 89 FOREACH_KSEGRP_IN_PROC(p, kg) { 90 switch (p->p_stat) { 91 case SSLEEP: 92 if (kg->kg_pri.pri_level > PZERO || 93 kg->kg_slptime != 0) /* ke? */ 94 goto nextproc; 95 /* FALLTHROUGH */ 96 case SRUN: 97 if ((p->p_flag & P_NOLOAD) != 0) 98 goto nextproc; 99 /* FALLTHROUGH */ 100 case SIDL: 101 nrun++; 102 } 103 nextproc: 104 } 105 } 106 sx_sunlock(&allproc_lock); 107 for (i = 0; i < 3; i++) 108 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 109 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 110 } 111 112 void 113 vmmeter() 114 { 115 116 if (time_second % 5 == 0) 117 loadav(&averunnable); 118 } 119 120 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 121 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 122 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 123 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 124 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 125 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 126 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 127 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 128 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 129 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 130 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 131 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 132 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 133 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 134 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 135 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 136 137 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 138 &averunnable, loadavg, "Machine loadaverage history"); 139 140 static int 141 vmtotal(SYSCTL_HANDLER_ARGS) 142 { 143 struct proc *p; 144 struct vmtotal total, *totalp; 145 vm_map_entry_t entry; 146 vm_object_t object; 147 vm_map_t map; 148 int paging; 149 struct ksegrp *kg; 150 151 totalp = &total; 152 bzero(totalp, sizeof *totalp); 153 /* 154 * Mark all objects as inactive. 155 */ 156 GIANT_REQUIRED; 157 TAILQ_FOREACH(object, &vm_object_list, object_list) 158 vm_object_clear_flag(object, OBJ_ACTIVE); 159 /* 160 * Calculate process statistics. 161 */ 162 sx_slock(&allproc_lock); 163 FOREACH_PROC_IN_SYSTEM(p) { 164 if (p->p_flag & P_SYSTEM) 165 continue; 166 mtx_lock_spin(&sched_lock); 167 switch (p->p_stat) { 168 case 0: 169 mtx_unlock_spin(&sched_lock); 170 continue; 171 172 case SMTX: 173 case SSLEEP: 174 case SSTOP: 175 kg = &p->p_ksegrp; /* XXXKSE */ 176 if (p->p_sflag & PS_INMEM) { 177 if (kg->kg_pri.pri_level <= PZERO) 178 totalp->t_dw++; 179 else if (kg->kg_slptime < maxslp) 180 totalp->t_sl++; 181 } else if (kg->kg_slptime < maxslp) 182 totalp->t_sw++; 183 if (kg->kg_slptime >= maxslp) { 184 mtx_unlock_spin(&sched_lock); 185 continue; 186 } 187 break; 188 189 case SWAIT: 190 totalp->t_sl++; 191 continue; 192 193 case SRUN: 194 case SIDL: 195 if (p->p_sflag & PS_INMEM) 196 totalp->t_rq++; 197 else 198 totalp->t_sw++; 199 if (p->p_stat == SIDL) { 200 mtx_unlock_spin(&sched_lock); 201 continue; 202 } 203 break; 204 } 205 mtx_unlock_spin(&sched_lock); 206 /* 207 * Note active objects. 208 */ 209 paging = 0; 210 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 211 entry != &map->header; entry = entry->next) { 212 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 213 entry->object.vm_object == NULL) 214 continue; 215 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 216 paging |= entry->object.vm_object->paging_in_progress; 217 } 218 if (paging) 219 totalp->t_pw++; 220 } 221 sx_sunlock(&allproc_lock); 222 /* 223 * Calculate object memory usage statistics. 224 */ 225 TAILQ_FOREACH(object, &vm_object_list, object_list) { 226 /* 227 * devices, like /dev/mem, will badly skew our totals 228 */ 229 if (object->type == OBJT_DEVICE) 230 continue; 231 totalp->t_vm += object->size; 232 totalp->t_rm += object->resident_page_count; 233 if (object->flags & OBJ_ACTIVE) { 234 totalp->t_avm += object->size; 235 totalp->t_arm += object->resident_page_count; 236 } 237 if (object->shadow_count > 1) { 238 /* shared object */ 239 totalp->t_vmshr += object->size; 240 totalp->t_rmshr += object->resident_page_count; 241 if (object->flags & OBJ_ACTIVE) { 242 totalp->t_avmshr += object->size; 243 totalp->t_armshr += object->resident_page_count; 244 } 245 } 246 } 247 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 248 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 249 } 250 251 SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 252 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 253 "System virtual memory statistics"); 254 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 255 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 256 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 257 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 258 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 259 v_swtch, CTLFLAG_RD, &cnt.v_swtch, 0, "Context switches"); 260 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 261 v_trap, CTLFLAG_RD, &cnt.v_trap, 0, "Traps"); 262 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, 263 v_syscall, CTLFLAG_RD, &cnt.v_syscall, 0, "Syscalls"); 264 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_intr, CTLFLAG_RD, 265 &cnt.v_intr, 0, "Hardware interrupts"); 266 SYSCTL_UINT(_vm_stats_sys, OID_AUTO, v_soft, CTLFLAG_RD, 267 &cnt.v_soft, 0, "Software interrupts"); 268 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 269 v_vm_faults, CTLFLAG_RD, &cnt.v_vm_faults, 0, "VM faults"); 270 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 271 v_cow_faults, CTLFLAG_RD, &cnt.v_cow_faults, 0, "COW faults"); 272 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 273 v_cow_optim, CTLFLAG_RD, &cnt.v_cow_optim, 0, "Optimized COW faults"); 274 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 275 v_zfod, CTLFLAG_RD, &cnt.v_zfod, 0, "Zero fill"); 276 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 277 v_ozfod, CTLFLAG_RD, &cnt.v_ozfod, 0, "Optimized zero fill"); 278 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 279 v_swapin, CTLFLAG_RD, &cnt.v_swapin, 0, "Swapin operations"); 280 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 281 v_swapout, CTLFLAG_RD, &cnt.v_swapout, 0, "Swapout operations"); 282 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 283 v_swappgsin, CTLFLAG_RD, &cnt.v_swappgsin, 0, "Swapin pages"); 284 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 285 v_swappgsout, CTLFLAG_RD, &cnt.v_swappgsout, 0, "Swapout pages"); 286 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 287 v_vnodein, CTLFLAG_RD, &cnt.v_vnodein, 0, "Vnodein operations"); 288 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 289 v_vnodeout, CTLFLAG_RD, &cnt.v_vnodeout, 0, "Vnodeout operations"); 290 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 291 v_vnodepgsin, CTLFLAG_RD, &cnt.v_vnodepgsin, 0, "Vnodein pages"); 292 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 293 v_vnodepgsout, CTLFLAG_RD, &cnt.v_vnodepgsout, 0, "Vnodeout pages"); 294 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 295 v_intrans, CTLFLAG_RD, &cnt.v_intrans, 0, "In transit page blocking"); 296 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 297 v_reactivated, CTLFLAG_RD, &cnt.v_reactivated, 0, "Reactivated pages"); 298 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 299 v_pdwakeups, CTLFLAG_RD, &cnt.v_pdwakeups, 0, "Pagedaemon wakeups"); 300 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 301 v_pdpages, CTLFLAG_RD, &cnt.v_pdpages, 0, "Pagedaemon page scans"); 302 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 303 v_dfree, CTLFLAG_RD, &cnt.v_dfree, 0, ""); 304 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 305 v_pfree, CTLFLAG_RD, &cnt.v_pfree, 0, ""); 306 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 307 v_tfree, CTLFLAG_RD, &cnt.v_tfree, 0, ""); 308 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 309 v_page_size, CTLFLAG_RD, &cnt.v_page_size, 0, ""); 310 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 311 v_page_count, CTLFLAG_RD, &cnt.v_page_count, 0, ""); 312 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 313 v_free_reserved, CTLFLAG_RD, &cnt.v_free_reserved, 0, ""); 314 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 315 v_free_target, CTLFLAG_RD, &cnt.v_free_target, 0, ""); 316 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 317 v_free_min, CTLFLAG_RD, &cnt.v_free_min, 0, ""); 318 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 319 v_free_count, CTLFLAG_RD, &cnt.v_free_count, 0, ""); 320 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 321 v_wire_count, CTLFLAG_RD, &cnt.v_wire_count, 0, ""); 322 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 323 v_active_count, CTLFLAG_RD, &cnt.v_active_count, 0, ""); 324 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 325 v_inactive_target, CTLFLAG_RD, &cnt.v_inactive_target, 0, ""); 326 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 327 v_inactive_count, CTLFLAG_RD, &cnt.v_inactive_count, 0, ""); 328 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 329 v_cache_count, CTLFLAG_RD, &cnt.v_cache_count, 0, ""); 330 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 331 v_cache_min, CTLFLAG_RD, &cnt.v_cache_min, 0, ""); 332 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 333 v_cache_max, CTLFLAG_RD, &cnt.v_cache_max, 0, ""); 334 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 335 v_pageout_free_min, CTLFLAG_RD, &cnt.v_pageout_free_min, 0, ""); 336 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 337 v_interrupt_free_min, CTLFLAG_RD, &cnt.v_interrupt_free_min, 0, ""); 338 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 339 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 340 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 341 v_forks, CTLFLAG_RD, &cnt.v_forks, 0, "Number of fork() calls"); 342 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 343 v_vforks, CTLFLAG_RD, &cnt.v_vforks, 0, "Number of vfork() calls"); 344 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 345 v_rforks, CTLFLAG_RD, &cnt.v_rforks, 0, "Number of rfork() calls"); 346 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 347 v_kthreads, CTLFLAG_RD, &cnt.v_kthreads, 0, "Number of fork() calls by kernel"); 348 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 349 v_forkpages, CTLFLAG_RD, &cnt.v_forkpages, 0, "VM pages affected by fork()"); 350 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 351 v_vforkpages, CTLFLAG_RD, &cnt.v_vforkpages, 0, "VM pages affected by vfork()"); 352 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 353 v_rforkpages, CTLFLAG_RD, &cnt.v_rforkpages, 0, "VM pages affected by rfork()"); 354 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 355 v_kthreadpages, CTLFLAG_RD, &cnt.v_kthreadpages, 0, "VM pages affected by fork() by kernel"); 356 #if 0 357 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 358 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 359 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 360 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 361 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 362 first_page, CTLFLAG_RD, &first_page, 0, ""); 363 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 364 last_page, CTLFLAG_RD, &last_page, 0, ""); 365 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 366 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 367 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 368 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 369 #endif 370