2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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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
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18 * may be used to endorse or promote products derived from this software
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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 1.4 2003/07/03 17:24:04 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 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 * vcnt() - accumulate statistics from the cnt structure for each cpu
181 * The vmmeter structure is now per-cpu as well as global. Those
182 * statistics which can be kept on a per-cpu basis (to avoid cache
183 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining
184 * statistics, such as v_free_reserved, are left in the global
187 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
190 vcnt(SYSCTL_HANDLER_ARGS)
194 int offset = (int)arg1;
196 for (i = 0; i < ncpus; ++i) {
197 struct globaldata *gd = globaldata_find(i);
198 count += *(int *)((char *)&gd->gd_cnt + offset);
200 return(SYSCTL_OUT(req, &count, sizeof(int)));
203 #define VMMETEROFF(var) (void *)offsetof(struct vmmeter, var)
205 SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
206 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal",
207 "System virtual memory statistics");
208 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
209 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
210 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
211 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
213 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
214 VMMETEROFF(v_swtch), 0, vcnt, "IU", "Context switches");
215 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RW,
216 VMMETEROFF(v_intrans_coll), 0, vcnt, "IU", "");
217 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RW,
218 VMMETEROFF(v_intrans_wait), 0, vcnt, "IU", "");
219 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
220 VMMETEROFF(v_trap), 0, vcnt, "IU", "Traps");
221 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
222 VMMETEROFF(v_syscall), 0, vcnt, "IU", "Syscalls");
223 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
224 VMMETEROFF(v_intr), 0, vcnt, "IU", "Hardware interrupts");
225 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
226 VMMETEROFF(v_soft), 0, vcnt, "IU", "Software interrupts");
227 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
228 VMMETEROFF(v_vm_faults), 0, vcnt, "IU", "VM faults");
229 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
230 VMMETEROFF(v_cow_faults), 0, vcnt, "IU", "COW faults");
231 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
232 VMMETEROFF(v_cow_optim), 0, vcnt, "IU", "Optimized COW faults");
233 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
234 VMMETEROFF(v_zfod), 0, vcnt, "IU", "Zero fill");
235 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
236 VMMETEROFF(v_ozfod), 0, vcnt, "IU", "Optimized zero fill");
237 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
238 VMMETEROFF(v_swapin), 0, vcnt, "IU", "Swapin operations");
239 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
240 VMMETEROFF(v_swapout), 0, vcnt, "IU", "Swapout operations");
241 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
242 VMMETEROFF(v_swappgsin), 0, vcnt, "IU", "Swapin pages");
243 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
244 VMMETEROFF(v_swappgsout), 0, vcnt, "IU", "Swapout pages");
245 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
246 VMMETEROFF(v_vnodein), 0, vcnt, "IU", "Vnodein operations");
247 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
248 VMMETEROFF(v_vnodeout), 0, vcnt, "IU", "Vnodeout operations");
249 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
250 VMMETEROFF(v_vnodepgsin), 0, vcnt, "IU", "Vnodein pages");
251 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
252 VMMETEROFF(v_vnodepgsout), 0, vcnt, "IU", "Vnodeout pages");
253 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
254 VMMETEROFF(v_intrans), 0, vcnt, "IU", "In transit page blocking");
255 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
256 VMMETEROFF(v_reactivated), 0, vcnt, "IU", "Reactivated pages");
257 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
258 VMMETEROFF(v_pdwakeups), 0, vcnt, "IU", "Pagedaemon wakeups");
259 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
260 VMMETEROFF(v_pdpages), 0, vcnt, "IU", "Pagedaemon page scans");
261 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
262 VMMETEROFF(v_dfree), 0, vcnt, "IU", "");
263 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
264 VMMETEROFF(v_pfree), 0, vcnt, "IU", "");
265 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
266 VMMETEROFF(v_tfree), 0, vcnt, "IU", "");
267 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
268 VMMETEROFF(v_forks), 0, vcnt, "IU", "Number of fork() calls");
269 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
270 VMMETEROFF(v_vforks), 0, vcnt, "IU", "Number of vfork() calls");
271 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
272 VMMETEROFF(v_rforks), 0, vcnt, "IU", "Number of rfork() calls");
273 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
274 VMMETEROFF(v_kthreads), 0, vcnt, "IU", "Number of fork() calls by kernel");
275 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
276 VMMETEROFF(v_forkpages), 0, vcnt, "IU", "VM pages affected by fork()");
277 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
278 VMMETEROFF(v_vforkpages), 0, vcnt, "IU", "VM pages affected by vfork()");
279 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
280 VMMETEROFF(v_rforkpages), 0, vcnt, "IU", "VM pages affected by rfork()");
281 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
282 VMMETEROFF(v_kthreadpages), 0, vcnt, "IU", "VM pages affected by fork() by kernel");
284 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
285 v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, "");
286 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
287 v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, "");
288 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
289 v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, "");
290 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
291 v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, "");
292 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
293 v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, "");
294 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
295 v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, "");
296 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
297 v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, "");
298 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
299 v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, "");
300 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
301 v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, "");
302 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
303 v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, "");
304 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
305 v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, "");
306 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
307 v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, "");
308 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
309 v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, "");
310 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
311 v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, "");
312 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
313 v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, "");
314 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
315 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");