2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
39 #include <sys/mutex.h>
41 #include <sys/resource.h>
43 #include <sys/vmmeter.h>
47 #include <vm/vm_page.h>
48 #include <vm/vm_extern.h>
49 #include <vm/vm_param.h>
51 #include <vm/vm_map.h>
52 #include <vm/vm_object.h>
53 #include <sys/sysctl.h>
57 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
58 CTLFLAG_RW, &cnt.v_free_min, 0, "");
59 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
60 CTLFLAG_RW, &cnt.v_free_target, 0, "");
61 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
62 CTLFLAG_RW, &cnt.v_free_reserved, 0, "");
63 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
64 CTLFLAG_RW, &cnt.v_inactive_target, 0, "");
65 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
66 CTLFLAG_RW, &cnt.v_cache_min, 0, "");
67 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
68 CTLFLAG_RW, &cnt.v_cache_max, 0, "");
69 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
70 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, "");
71 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
72 CTLFLAG_RW, &cnt.v_free_severe, 0, "");
75 sysctl_vm_loadavg(SYSCTL_HANDLER_ARGS)
81 if (req->flags & SCTL_MASK32) {
82 la[0] = averunnable.ldavg[0];
83 la[1] = averunnable.ldavg[1];
84 la[2] = averunnable.ldavg[2];
85 la[3] = averunnable.fscale;
86 return SYSCTL_OUT(req, la, sizeof(la));
89 return SYSCTL_OUT(req, &averunnable, sizeof(averunnable));
91 SYSCTL_PROC(_vm, VM_LOADAVG, loadavg, CTLTYPE_STRUCT | CTLFLAG_RD |
92 CTLFLAG_MPSAFE, NULL, 0, sysctl_vm_loadavg, "S,loadavg",
93 "Machine loadaverage history");
96 vmtotal(SYSCTL_HANDLER_ARGS)
100 vm_map_entry_t entry;
107 bzero(&total, sizeof(total));
109 * Mark all objects as inactive.
111 mtx_lock(&vm_object_list_mtx);
112 TAILQ_FOREACH(object, &vm_object_list, object_list) {
113 if (!VM_OBJECT_TRYLOCK(object)) {
115 * Avoid a lock-order reversal. Consequently,
116 * the reported number of active pages may be
117 * greater than the actual number.
121 vm_object_clear_flag(object, OBJ_ACTIVE);
122 VM_OBJECT_UNLOCK(object);
124 mtx_unlock(&vm_object_list_mtx);
126 * Calculate process statistics.
128 sx_slock(&allproc_lock);
129 FOREACH_PROC_IN_SYSTEM(p) {
130 if (p->p_flag & P_SYSTEM)
133 switch (p->p_state) {
139 FOREACH_THREAD_IN_PROC(p, td) {
141 switch (td->td_state) {
143 if (TD_IS_SWAPPED(td))
145 else if (TD_IS_SLEEPING(td) &&
146 td->td_priority <= PZERO)
168 * Note active objects.
171 vm = vmspace_acquire_ref(p);
175 vm_map_lock_read(map);
176 for (entry = map->header.next;
177 entry != &map->header; entry = entry->next) {
178 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
179 (object = entry->object.vm_object) == NULL)
181 VM_OBJECT_LOCK(object);
182 vm_object_set_flag(object, OBJ_ACTIVE);
183 paging |= object->paging_in_progress;
184 VM_OBJECT_UNLOCK(object);
186 vm_map_unlock_read(map);
191 sx_sunlock(&allproc_lock);
193 * Calculate object memory usage statistics.
195 mtx_lock(&vm_object_list_mtx);
196 TAILQ_FOREACH(object, &vm_object_list, object_list) {
198 * Perform unsynchronized reads on the object to avoid
199 * a lock-order reversal. In this case, the lack of
200 * synchronization should not impair the accuracy of
201 * the reported statistics.
203 if (object->type == OBJT_DEVICE || object->type == OBJT_SG) {
205 * Devices, like /dev/mem, will badly skew our totals.
209 if (object->ref_count == 0) {
211 * Also skip unreferenced objects, including
212 * vnodes representing mounted file systems.
216 total.t_vm += object->size;
217 total.t_rm += object->resident_page_count;
218 if (object->flags & OBJ_ACTIVE) {
219 total.t_avm += object->size;
220 total.t_arm += object->resident_page_count;
222 if (object->shadow_count > 1) {
224 total.t_vmshr += object->size;
225 total.t_rmshr += object->resident_page_count;
226 if (object->flags & OBJ_ACTIVE) {
227 total.t_avmshr += object->size;
228 total.t_armshr += object->resident_page_count;
232 mtx_unlock(&vm_object_list_mtx);
233 total.t_free = cnt.v_free_count + cnt.v_cache_count;
234 return (sysctl_handle_opaque(oidp, &total, sizeof(total), req));
238 * vcnt() - accumulate statistics from all cpus and the global cnt
241 * The vmmeter structure is now per-cpu as well as global. Those
242 * statistics which can be kept on a per-cpu basis (to avoid cache
243 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining
244 * statistics, such as v_free_reserved, are left in the global
247 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
250 vcnt(SYSCTL_HANDLER_ARGS)
252 int count = *(int *)arg1;
253 int offset = (char *)arg1 - (char *)&cnt;
257 struct pcpu *pcpu = pcpu_find(i);
258 count += *(int *)((char *)&pcpu->pc_cnt + offset);
260 return (SYSCTL_OUT(req, &count, sizeof(int)));
263 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE,
264 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal",
265 "System virtual memory statistics");
266 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
267 static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0,
268 "VM meter sys stats");
269 static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0,
270 "VM meter vm stats");
271 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
273 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
274 &cnt.v_swtch, 0, vcnt, "IU", "Context switches");
275 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
276 &cnt.v_trap, 0, vcnt, "IU", "Traps");
277 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
278 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls");
279 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
280 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts");
281 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
282 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts");
283 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
284 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults");
285 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
286 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults");
287 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
288 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults");
289 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
290 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill");
291 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
292 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill");
293 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
294 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations");
295 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
296 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations");
297 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
298 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages");
299 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
300 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages");
301 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
302 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations");
303 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
304 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations");
305 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
306 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages");
307 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
308 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages");
309 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
310 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking");
311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
312 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages");
313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
314 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups");
315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
316 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans");
317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tcached, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
318 &cnt.v_tcached, 0, vcnt, "IU", "Total pages cached");
319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
320 &cnt.v_dfree, 0, vcnt, "IU", "");
321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
322 &cnt.v_pfree, 0, vcnt, "IU", "");
323 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
324 &cnt.v_tfree, 0, vcnt, "IU", "");
325 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
326 &cnt.v_page_size, 0, vcnt, "IU", "");
327 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
328 &cnt.v_page_count, 0, vcnt, "IU", "");
329 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
330 &cnt.v_free_reserved, 0, vcnt, "IU", "");
331 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
332 &cnt.v_free_target, 0, vcnt, "IU", "");
333 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
334 &cnt.v_free_min, 0, vcnt, "IU", "");
335 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
336 &cnt.v_free_count, 0, vcnt, "IU", "");
337 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
338 &cnt.v_wire_count, 0, vcnt, "IU", "");
339 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
340 &cnt.v_active_count, 0, vcnt, "IU", "");
341 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
342 &cnt.v_inactive_target, 0, vcnt, "IU", "");
343 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
344 &cnt.v_inactive_count, 0, vcnt, "IU", "");
345 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
346 &cnt.v_cache_count, 0, vcnt, "IU", "");
347 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
348 &cnt.v_cache_min, 0, vcnt, "IU", "");
349 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
350 &cnt.v_cache_max, 0, vcnt, "IU", "");
351 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
352 &cnt.v_pageout_free_min, 0, vcnt, "IU", "");
353 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
354 &cnt.v_interrupt_free_min, 0, vcnt, "IU", "");
355 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
356 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls");
357 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
358 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls");
359 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
360 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls");
361 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
362 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel");
363 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
364 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()");
365 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
366 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()");
367 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
368 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()");
369 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE,
370 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel");
372 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
373 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");