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 * 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.
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
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94
34 * $FreeBSD: src/sys/vm/vm_meter.c,v 1.34.2.7 2002/10/10 19:28:22 dillon Exp $
35 * $DragonFly: src/sys/vm/vm_meter.c,v 1.7 2003/07/19 21:14:53 dillon Exp $
38 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/resource.h>
43 #include <sys/vmmeter.h>
46 #include <vm/vm_page.h>
47 #include <vm/vm_extern.h>
48 #include <vm/vm_param.h>
51 #include <vm/vm_map.h>
52 #include <vm/vm_object.h>
53 #include <sys/sysctl.h>
55 struct vmstats vmstats;
57 static int maxslp = MAXSLP;
59 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
60 CTLFLAG_RW, &vmstats.v_free_min, 0, "");
61 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
62 CTLFLAG_RW, &vmstats.v_free_target, 0, "");
63 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
64 CTLFLAG_RW, &vmstats.v_free_reserved, 0, "");
65 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
66 CTLFLAG_RW, &vmstats.v_inactive_target, 0, "");
67 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
68 CTLFLAG_RW, &vmstats.v_cache_min, 0, "");
69 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
70 CTLFLAG_RW, &vmstats.v_cache_max, 0, "");
71 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
72 CTLFLAG_RW, &vmstats.v_pageout_free_min, 0, "");
73 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
74 CTLFLAG_RW, &vmstats.v_free_severe, 0, "");
76 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
77 &averunnable, loadavg, "Machine loadaverage history");
80 do_vmtotal(SYSCTL_HANDLER_ARGS)
83 struct vmtotal total, *totalp;
90 bzero(totalp, sizeof *totalp);
92 * Mark all objects as inactive.
94 for (object = TAILQ_FIRST(&vm_object_list);
96 object = TAILQ_NEXT(object,object_list))
97 vm_object_clear_flag(object, OBJ_ACTIVE);
99 * Calculate process statistics.
101 for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
102 if (p->p_flag & P_SYSTEM)
110 if (p->p_flag & P_INMEM) {
111 if ((p->p_flag & P_SINTR) == 0)
113 else if (p->p_slptime < maxslp)
115 } else if (p->p_slptime < maxslp)
117 if (p->p_slptime >= maxslp)
123 if (p->p_flag & P_INMEM)
127 if (p->p_stat == SIDL)
132 * Note active objects.
135 for (map = &p->p_vmspace->vm_map, entry = map->header.next;
136 entry != &map->header; entry = entry->next) {
137 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
138 entry->object.vm_object == NULL)
140 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
141 paging |= entry->object.vm_object->paging_in_progress;
147 * Calculate object memory usage statistics.
149 for (object = TAILQ_FIRST(&vm_object_list);
151 object = TAILQ_NEXT(object, object_list)) {
153 * devices, like /dev/mem, will badly skew our totals
155 if (object->type == OBJT_DEVICE)
157 totalp->t_vm += object->size;
158 totalp->t_rm += object->resident_page_count;
159 if (object->flags & OBJ_ACTIVE) {
160 totalp->t_avm += object->size;
161 totalp->t_arm += object->resident_page_count;
163 if (object->shadow_count > 1) {
165 totalp->t_vmshr += object->size;
166 totalp->t_rmshr += object->resident_page_count;
167 if (object->flags & OBJ_ACTIVE) {
168 totalp->t_avmshr += object->size;
169 totalp->t_armshr += object->resident_page_count;
173 totalp->t_free = vmstats.v_free_count + vmstats.v_cache_count;
174 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
178 do_vmstats(SYSCTL_HANDLER_ARGS)
180 struct vmstats vms = vmstats;
181 return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
185 do_vmmeter(SYSCTL_HANDLER_ARGS)
187 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
188 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
192 bzero(&vmm, sizeof(vmm));
193 for (i = 0; i < ncpus; ++i) {
195 struct globaldata *gd = globaldata_find(i);
197 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
198 *(u_int *)((char *)&vmm + off) +=
199 *(u_int *)((char *)&gd->gd_cnt + off);
203 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
207 * vcnt() - accumulate statistics from the cnt structure for each cpu
209 * The vmmeter structure is now per-cpu as well as global. Those
210 * statistics which can be kept on a per-cpu basis (to avoid cache
211 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining
212 * statistics, such as v_free_reserved, are left in the global
215 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
218 vcnt(SYSCTL_HANDLER_ARGS)
224 for (i = 0; i < ncpus; ++i) {
225 struct globaldata *gd = globaldata_find(i);
226 count += *(int *)((char *)&gd->gd_cnt + offset);
228 return(SYSCTL_OUT(req, &count, sizeof(int)));
231 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
233 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
234 0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
235 "System virtual memory aggregate");
236 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
237 0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
238 "System virtual memory statistics");
239 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
240 0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
241 "System per-cpu statistics");
242 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
243 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
244 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
245 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
247 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
248 0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
249 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
250 0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "");
251 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
252 0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "");
253 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
254 0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "");
255 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
256 0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "");
257 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
258 0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "");
259 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
260 0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
261 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
262 0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
263 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
264 0, VMMETEROFF(v_intr), vcnt, "IU", "Hardware interrupts");
265 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
266 0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
267 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
268 0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
269 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
270 0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
271 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
272 0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
273 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
274 0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
275 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
276 0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
277 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
278 0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
279 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
280 0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
281 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
282 0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
283 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
284 0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
285 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
286 0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
287 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
288 0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
289 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
290 0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
291 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
292 0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
293 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
294 0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
295 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
296 0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
297 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
298 0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
299 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
300 0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
301 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
302 0, VMMETEROFF(v_dfree), vcnt, "IU", "");
303 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
304 0, VMMETEROFF(v_pfree), vcnt, "IU", "");
305 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
306 0, VMMETEROFF(v_tfree), vcnt, "IU", "");
307 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
308 0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
309 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
310 0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
312 0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
314 0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
316 0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
318 0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
320 0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
322 0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
324 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
325 v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, "");
326 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
327 v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, "");
328 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
329 v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, "");
330 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
331 v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, "");
332 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
333 v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, "");
334 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
335 v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, "");
336 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
337 v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, "");
338 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
339 v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, "");
340 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
341 v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, "");
342 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
343 v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, "");
344 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
345 v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, "");
346 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
347 v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, "");
348 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
349 v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, "");
350 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
351 v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, "");
352 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
353 v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, "");
354 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
355 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");