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
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9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
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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
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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 1.5 2003/07/03 18:20:03 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) {
112 if (p->p_priority <= PZERO)
114 else if (p->p_slptime < maxslp)
116 } else if (p->p_slptime < maxslp)
118 if (p->p_slptime >= maxslp)
124 if (p->p_flag & P_INMEM)
128 if (p->p_stat == SIDL)
133 * Note active objects.
136 for (map = &p->p_vmspace->vm_map, entry = map->header.next;
137 entry != &map->header; entry = entry->next) {
138 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
139 entry->object.vm_object == NULL)
141 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
142 paging |= entry->object.vm_object->paging_in_progress;
148 * Calculate object memory usage statistics.
150 for (object = TAILQ_FIRST(&vm_object_list);
152 object = TAILQ_NEXT(object, object_list)) {
154 * devices, like /dev/mem, will badly skew our totals
156 if (object->type == OBJT_DEVICE)
158 totalp->t_vm += object->size;
159 totalp->t_rm += object->resident_page_count;
160 if (object->flags & OBJ_ACTIVE) {
161 totalp->t_avm += object->size;
162 totalp->t_arm += object->resident_page_count;
164 if (object->shadow_count > 1) {
166 totalp->t_vmshr += object->size;
167 totalp->t_rmshr += object->resident_page_count;
168 if (object->flags & OBJ_ACTIVE) {
169 totalp->t_avmshr += object->size;
170 totalp->t_armshr += object->resident_page_count;
174 totalp->t_free = vmstats.v_free_count + vmstats.v_cache_count;
175 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
179 do_vmstats(SYSCTL_HANDLER_ARGS)
181 struct vmstats vms = vmstats;
182 return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
186 do_vmmeter(SYSCTL_HANDLER_ARGS)
188 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
189 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
193 bzero(&vmm, sizeof(vmm));
194 for (i = 0; i < ncpus; ++i) {
196 struct globaldata *gd = globaldata_find(i);
198 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
199 *(u_int *)((char *)&vmm + off) +=
200 *(u_int *)((char *)&gd->gd_cnt + off);
204 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
208 * vcnt() - accumulate statistics from the cnt structure for each cpu
210 * The vmmeter structure is now per-cpu as well as global. Those
211 * statistics which can be kept on a per-cpu basis (to avoid cache
212 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining
213 * statistics, such as v_free_reserved, are left in the global
216 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
219 vcnt(SYSCTL_HANDLER_ARGS)
225 for (i = 0; i < ncpus; ++i) {
226 struct globaldata *gd = globaldata_find(i);
227 count += *(int *)((char *)&gd->gd_cnt + offset);
229 return(SYSCTL_OUT(req, &count, sizeof(int)));
232 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
234 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
235 0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
236 "System virtual memory aggregate");
237 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
238 0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
239 "System virtual memory statistics");
240 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
241 0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
242 "System per-cpu statistics");
243 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
244 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
245 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
246 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
248 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
249 0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
250 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
251 0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "");
252 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
253 0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "");
254 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
255 0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
256 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
257 0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
258 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
259 0, VMMETEROFF(v_intr), vcnt, "IU", "Hardware interrupts");
260 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
261 0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
262 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
263 0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
264 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
265 0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
266 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
267 0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
268 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
269 0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
270 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
271 0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
272 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
273 0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
274 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
275 0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
276 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
277 0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
278 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
279 0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
280 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
281 0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
282 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
283 0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
284 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
285 0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
286 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
287 0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
288 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
289 0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
290 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
291 0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
292 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
293 0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
294 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
295 0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
296 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
297 0, VMMETEROFF(v_dfree), vcnt, "IU", "");
298 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
299 0, VMMETEROFF(v_pfree), vcnt, "IU", "");
300 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
301 0, VMMETEROFF(v_tfree), vcnt, "IU", "");
302 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
303 0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
304 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
305 0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
307 0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
309 0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
311 0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
313 0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
315 0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
317 0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
319 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
320 v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, "");
321 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
322 v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, "");
323 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
324 v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, "");
325 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
326 v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, "");
327 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
328 v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, "");
329 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
330 v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, "");
331 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
332 v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, "");
333 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
334 v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, "");
335 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
336 v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, "");
337 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
338 v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, "");
339 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
340 v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, "");
341 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
342 v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, "");
343 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
344 v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, "");
345 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
346 v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, "");
347 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
348 v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, "");
349 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
350 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");