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 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/mutex.h> 44 #include <sys/proc.h> 45 #include <sys/resource.h> 46 #include <sys/sx.h> 47 #include <sys/vmmeter.h> 48 #include <sys/smp.h> 49 50 #include <vm/vm.h> 51 #include <vm/vm_page.h> 52 #include <vm/vm_extern.h> 53 #include <vm/vm_param.h> 54 #include <vm/pmap.h> 55 #include <vm/vm_map.h> 56 #include <vm/vm_object.h> 57 #include <sys/sysctl.h> 58 59 struct vmmeter cnt; 60 61 int maxslp = MAXSLP; 62 63 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 64 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 65 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 66 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 67 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 68 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 69 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 70 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 71 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 72 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 73 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 74 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 75 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 76 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 77 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 78 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 79 80 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 81 &averunnable, loadavg, "Machine loadaverage history"); 82 83 static int 84 vmtotal(SYSCTL_HANDLER_ARGS) 85 { 86 /* XXXKSE almost completely broken */ 87 struct proc *p; 88 struct vmtotal total, *totalp; 89 vm_map_entry_t entry; 90 vm_object_t object; 91 vm_map_t map; 92 int paging; 93 struct thread *td; 94 95 totalp = &total; 96 bzero(totalp, sizeof *totalp); 97 /* 98 * Mark all objects as inactive. 99 */ 100 GIANT_REQUIRED; 101 mtx_lock(&vm_object_list_mtx); 102 TAILQ_FOREACH(object, &vm_object_list, object_list) { 103 if (!VM_OBJECT_TRYLOCK(object)) { 104 /* 105 * Avoid a lock-order reversal. Consequently, 106 * the reported number of active pages may be 107 * greater than the actual number. 108 */ 109 continue; 110 } 111 vm_object_clear_flag(object, OBJ_ACTIVE); 112 VM_OBJECT_UNLOCK(object); 113 } 114 mtx_unlock(&vm_object_list_mtx); 115 /* 116 * Calculate process statistics. 117 */ 118 sx_slock(&allproc_lock); 119 FOREACH_PROC_IN_SYSTEM(p) { 120 if (p->p_flag & P_SYSTEM) 121 continue; 122 mtx_lock_spin(&sched_lock); 123 switch (p->p_state) { 124 case PRS_NEW: 125 mtx_unlock_spin(&sched_lock); 126 continue; 127 break; 128 default: 129 FOREACH_THREAD_IN_PROC(p, td) { 130 /* Need new statistics XXX */ 131 switch (td->td_state) { 132 case TDS_INHIBITED: 133 if (TD_ON_LOCK(td) || 134 (td->td_inhibitors == 135 TDI_SWAPPED)) { 136 totalp->t_sw++; 137 } else if (TD_IS_SLEEPING(td) || 138 TD_AWAITING_INTR(td) || 139 TD_IS_SUSPENDED(td)) { 140 if (td->td_priority <= PZERO) 141 totalp->t_dw++; 142 else 143 totalp->t_sl++; 144 } 145 break; 146 147 case TDS_CAN_RUN: 148 totalp->t_sw++; 149 break; 150 case TDS_RUNQ: 151 case TDS_RUNNING: 152 totalp->t_rq++; 153 continue; 154 default: 155 break; 156 } 157 } 158 } 159 mtx_unlock_spin(&sched_lock); 160 /* 161 * Note active objects. 162 */ 163 paging = 0; 164 map = &p->p_vmspace->vm_map; 165 vm_map_lock_read(map); 166 for (entry = map->header.next; 167 entry != &map->header; entry = entry->next) { 168 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 169 (object = entry->object.vm_object) == NULL) 170 continue; 171 VM_OBJECT_LOCK(object); 172 vm_object_set_flag(object, OBJ_ACTIVE); 173 paging |= object->paging_in_progress; 174 VM_OBJECT_UNLOCK(object); 175 } 176 vm_map_unlock_read(map); 177 if (paging) 178 totalp->t_pw++; 179 } 180 sx_sunlock(&allproc_lock); 181 /* 182 * Calculate object memory usage statistics. 183 */ 184 mtx_lock(&vm_object_list_mtx); 185 TAILQ_FOREACH(object, &vm_object_list, object_list) { 186 /* 187 * Perform unsynchronized reads on the object to avoid 188 * a lock-order reversal. In this case, the lack of 189 * synchronization should not impair the accuracy of 190 * the reported statistics. 191 */ 192 if (object->type == OBJT_DEVICE) { 193 /* 194 * Devices, like /dev/mem, will badly skew our totals. 195 */ 196 continue; 197 } 198 totalp->t_vm += object->size; 199 totalp->t_rm += object->resident_page_count; 200 if (object->flags & OBJ_ACTIVE) { 201 totalp->t_avm += object->size; 202 totalp->t_arm += object->resident_page_count; 203 } 204 if (object->shadow_count > 1) { 205 /* shared object */ 206 totalp->t_vmshr += object->size; 207 totalp->t_rmshr += object->resident_page_count; 208 if (object->flags & OBJ_ACTIVE) { 209 totalp->t_avmshr += object->size; 210 totalp->t_armshr += object->resident_page_count; 211 } 212 } 213 } 214 mtx_unlock(&vm_object_list_mtx); 215 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 216 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 217 } 218 219 /* 220 * vcnt() - accumulate statistics from all cpus and the global cnt 221 * structure. 222 * 223 * The vmmeter structure is now per-cpu as well as global. Those 224 * statistics which can be kept on a per-cpu basis (to avoid cache 225 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 226 * statistics, such as v_free_reserved, are left in the global 227 * structure. 228 * 229 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 230 */ 231 static int 232 vcnt(SYSCTL_HANDLER_ARGS) 233 { 234 int error = 0; 235 int count = *(int *)arg1; 236 #ifdef SMP 237 int i; 238 int offset = (char *)arg1 - (char *)&cnt; 239 240 for (i = 0; i < mp_ncpus; ++i) { 241 struct pcpu *pcpu = pcpu_find(i); 242 count += *(int *)((char *)&pcpu->pc_cnt + offset); 243 } 244 #else 245 int offset = (char *)arg1 - (char *)&cnt; 246 count += *(int *)((char *)PCPU_PTR(cnt) + offset); 247 #endif 248 error = SYSCTL_OUT(req, &count, sizeof(int)); 249 return(error); 250 } 251 252 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 253 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 254 "System virtual memory statistics"); 255 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 256 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 257 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 258 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 259 260 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 261 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 262 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 263 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 264 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 265 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 266 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 267 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 268 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 269 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 270 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 271 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 272 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 273 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 274 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 275 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 276 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 277 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 278 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 279 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 280 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 281 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 282 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 283 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 284 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 285 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 286 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 287 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 288 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 289 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 290 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 291 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 292 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 293 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 294 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 295 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 296 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 297 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 298 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 299 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 300 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 301 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 302 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 303 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 304 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 305 &cnt.v_dfree, 0, vcnt, "IU", ""); 306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 307 &cnt.v_pfree, 0, vcnt, "IU", ""); 308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 309 &cnt.v_tfree, 0, vcnt, "IU", ""); 310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD, 311 &cnt.v_page_size, 0, vcnt, "IU", ""); 312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD, 313 &cnt.v_page_count, 0, vcnt, "IU", ""); 314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD, 315 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD, 317 &cnt.v_free_target, 0, vcnt, "IU", ""); 318 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD, 319 &cnt.v_free_min, 0, vcnt, "IU", ""); 320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD, 321 &cnt.v_free_count, 0, vcnt, "IU", ""); 322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD, 323 &cnt.v_wire_count, 0, vcnt, "IU", ""); 324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD, 325 &cnt.v_active_count, 0, vcnt, "IU", ""); 326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD, 327 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD, 329 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD, 331 &cnt.v_cache_count, 0, vcnt, "IU", ""); 332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD, 333 &cnt.v_cache_min, 0, vcnt, "IU", ""); 334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD, 335 &cnt.v_cache_max, 0, vcnt, "IU", ""); 336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD, 337 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD, 339 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 341 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 343 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 345 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 346 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 347 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 348 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 349 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 350 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 351 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 352 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 353 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 354 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 355 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 356 357 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 358 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 359 #if 0 360 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 361 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 362 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 363 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 364 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 365 first_page, CTLFLAG_RD, &first_page, 0, ""); 366 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 367 last_page, CTLFLAG_RD, &last_page, 0, ""); 368 #endif 369