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>
59 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
60 CTLFLAG_RW, &cnt.v_free_min, 0, "");
61 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
62 CTLFLAG_RW, &cnt.v_free_target, 0, "");
63 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
64 CTLFLAG_RW, &cnt.v_free_reserved, 0, "");
65 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
66 CTLFLAG_RW, &cnt.v_inactive_target, 0, "");
67 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
68 CTLFLAG_RW, &cnt.v_cache_min, 0, "");
69 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
70 CTLFLAG_RW, &cnt.v_cache_max, 0, "");
71 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
72 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, "");
73 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
74 CTLFLAG_RW, &cnt.v_free_severe, 0, "");
77 sysctl_vm_loadavg(SYSCTL_HANDLER_ARGS)
82 if (req->flags & SCTL_MASK32) {
83 la[0] = averunnable.ldavg[0];
84 la[1] = averunnable.ldavg[1];
85 la[2] = averunnable.ldavg[2];
86 la[3] = averunnable.fscale;
87 return SYSCTL_OUT(req, la, sizeof(la));
90 return SYSCTL_OUT(req, &averunnable, sizeof(averunnable));
92 SYSCTL_PROC(_vm, VM_LOADAVG, loadavg, CTLTYPE_STRUCT|CTLFLAG_RD,
93 NULL, 0, sysctl_vm_loadavg, "S,loadavg", "Machine loadaverage history");
96 vmtotal(SYSCTL_HANDLER_ARGS)
98 /* XXXKSE almost completely broken */
100 struct vmtotal total, *totalp;
101 vm_map_entry_t entry;
109 bzero(totalp, sizeof *totalp);
111 * Mark all objects as inactive.
114 mtx_lock(&vm_object_list_mtx);
115 TAILQ_FOREACH(object, &vm_object_list, object_list) {
116 if (!VM_OBJECT_TRYLOCK(object)) {
118 * Avoid a lock-order reversal. Consequently,
119 * the reported number of active pages may be
120 * greater than the actual number.
124 vm_object_clear_flag(object, OBJ_ACTIVE);
125 VM_OBJECT_UNLOCK(object);
127 mtx_unlock(&vm_object_list_mtx);
129 * Calculate process statistics.
131 sx_slock(&allproc_lock);
132 FOREACH_PROC_IN_SYSTEM(p) {
133 if (p->p_flag & P_SYSTEM)
135 mtx_lock_spin(&sched_lock);
136 switch (p->p_state) {
138 mtx_unlock_spin(&sched_lock);
142 FOREACH_THREAD_IN_PROC(p, td) {
143 /* Need new statistics XXX */
144 switch (td->td_state) {
146 if (TD_ON_LOCK(td) ||
147 (td->td_inhibitors ==
150 } else if (TD_IS_SLEEPING(td) ||
151 TD_AWAITING_INTR(td) ||
152 TD_IS_SUSPENDED(td)) {
153 if (td->td_priority <= PZERO)
172 mtx_unlock_spin(&sched_lock);
174 * Note active objects.
177 vm = vmspace_acquire_ref(p);
181 vm_map_lock_read(map);
182 for (entry = map->header.next;
183 entry != &map->header; entry = entry->next) {
184 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
185 (object = entry->object.vm_object) == NULL)
187 VM_OBJECT_LOCK(object);
188 vm_object_set_flag(object, OBJ_ACTIVE);
189 paging |= object->paging_in_progress;
190 VM_OBJECT_UNLOCK(object);
192 vm_map_unlock_read(map);
197 sx_sunlock(&allproc_lock);
199 * Calculate object memory usage statistics.
201 mtx_lock(&vm_object_list_mtx);
202 TAILQ_FOREACH(object, &vm_object_list, object_list) {
204 * Perform unsynchronized reads on the object to avoid
205 * a lock-order reversal. In this case, the lack of
206 * synchronization should not impair the accuracy of
207 * the reported statistics.
209 if (object->type == OBJT_DEVICE) {
211 * Devices, like /dev/mem, will badly skew our totals.
215 totalp->t_vm += object->size;
216 totalp->t_rm += object->resident_page_count;
217 if (object->flags & OBJ_ACTIVE) {
218 totalp->t_avm += object->size;
219 totalp->t_arm += object->resident_page_count;
221 if (object->shadow_count > 1) {
223 totalp->t_vmshr += object->size;
224 totalp->t_rmshr += object->resident_page_count;
225 if (object->flags & OBJ_ACTIVE) {
226 totalp->t_avmshr += object->size;
227 totalp->t_armshr += object->resident_page_count;
231 mtx_unlock(&vm_object_list_mtx);
232 totalp->t_free = cnt.v_free_count + cnt.v_cache_count;
233 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
237 * vcnt() - accumulate statistics from all cpus and the global cnt
240 * The vmmeter structure is now per-cpu as well as global. Those
241 * statistics which can be kept on a per-cpu basis (to avoid cache
242 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining
243 * statistics, such as v_free_reserved, are left in the global
246 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
249 vcnt(SYSCTL_HANDLER_ARGS)
251 int count = *(int *)arg1;
252 int offset = (char *)arg1 - (char *)&cnt;
256 for (i = 0; i < mp_ncpus; ++i) {
257 struct pcpu *pcpu = pcpu_find(i);
258 count += *(int *)((char *)&pcpu->pc_cnt + offset);
261 count += *(int *)((char *)PCPU_PTR(cnt) + offset);
263 return (SYSCTL_OUT(req, &count, sizeof(int)));
266 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
267 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal",
268 "System virtual memory statistics");
269 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
270 static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0,
271 "VM meter sys stats");
272 static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0,
273 "VM meter vm stats");
274 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
276 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
277 &cnt.v_swtch, 0, vcnt, "IU", "Context switches");
278 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
279 &cnt.v_trap, 0, vcnt, "IU", "Traps");
280 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
281 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls");
282 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
283 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts");
284 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
285 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts");
286 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
287 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults");
288 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
289 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults");
290 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
291 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults");
292 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
293 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill");
294 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
295 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill");
296 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
297 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations");
298 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
299 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations");
300 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
301 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages");
302 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
303 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages");
304 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
305 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations");
306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
307 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations");
308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
309 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages");
310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
311 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages");
312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
313 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking");
314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
315 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages");
316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
317 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups");
318 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
319 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans");
320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
321 &cnt.v_dfree, 0, vcnt, "IU", "");
322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
323 &cnt.v_pfree, 0, vcnt, "IU", "");
324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
325 &cnt.v_tfree, 0, vcnt, "IU", "");
326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD,
327 &cnt.v_page_size, 0, vcnt, "IU", "");
328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD,
329 &cnt.v_page_count, 0, vcnt, "IU", "");
330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD,
331 &cnt.v_free_reserved, 0, vcnt, "IU", "");
332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD,
333 &cnt.v_free_target, 0, vcnt, "IU", "");
334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD,
335 &cnt.v_free_min, 0, vcnt, "IU", "");
336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD,
337 &cnt.v_free_count, 0, vcnt, "IU", "");
338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD,
339 &cnt.v_wire_count, 0, vcnt, "IU", "");
340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD,
341 &cnt.v_active_count, 0, vcnt, "IU", "");
342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD,
343 &cnt.v_inactive_target, 0, vcnt, "IU", "");
344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD,
345 &cnt.v_inactive_count, 0, vcnt, "IU", "");
346 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD,
347 &cnt.v_cache_count, 0, vcnt, "IU", "");
348 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD,
349 &cnt.v_cache_min, 0, vcnt, "IU", "");
350 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD,
351 &cnt.v_cache_max, 0, vcnt, "IU", "");
352 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD,
353 &cnt.v_pageout_free_min, 0, vcnt, "IU", "");
354 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD,
355 &cnt.v_interrupt_free_min, 0, vcnt, "IU", "");
356 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
357 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls");
358 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
359 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls");
360 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
361 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls");
362 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
363 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel");
364 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
365 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()");
366 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
367 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()");
368 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
369 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()");
370 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
371 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel");
373 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
374 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");
376 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
377 page_mask, CTLFLAG_RD, &page_mask, 0, "");
378 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
379 page_shift, CTLFLAG_RD, &page_shift, 0, "");
380 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
381 first_page, CTLFLAG_RD, &first_page, 0, "");
382 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
383 last_page, CTLFLAG_RD, &last_page, 0, "");