FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_meter.c
1 /*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94
34 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: releng/5.2/sys/vm/vm_meter.c 116226 2003-06-11 23:50:51Z obrien $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/lock.h>
43 #include <sys/mutex.h>
44 #include <sys/proc.h>
45 #include <sys/resource.h>
46 #include <sys/sx.h>
47 #include <sys/vmmeter.h>
48 #include <sys/smp.h>
49
50 #include <vm/vm.h>
51 #include <vm/vm_page.h>
52 #include <vm/vm_extern.h>
53 #include <vm/vm_param.h>
54 #include <vm/pmap.h>
55 #include <vm/vm_map.h>
56 #include <vm/vm_object.h>
57 #include <sys/sysctl.h>
58
59 struct vmmeter cnt;
60
61 int maxslp = MAXSLP;
62
63 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
64 CTLFLAG_RW, &cnt.v_free_min, 0, "");
65 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
66 CTLFLAG_RW, &cnt.v_free_target, 0, "");
67 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
68 CTLFLAG_RW, &cnt.v_free_reserved, 0, "");
69 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
70 CTLFLAG_RW, &cnt.v_inactive_target, 0, "");
71 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
72 CTLFLAG_RW, &cnt.v_cache_min, 0, "");
73 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
74 CTLFLAG_RW, &cnt.v_cache_max, 0, "");
75 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
76 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, "");
77 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
78 CTLFLAG_RW, &cnt.v_free_severe, 0, "");
79
80 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
81 &averunnable, loadavg, "Machine loadaverage history");
82
83 static int
84 vmtotal(SYSCTL_HANDLER_ARGS)
85 {
86 /* XXXKSE almost completely broken */
87 struct proc *p;
88 struct vmtotal total, *totalp;
89 vm_map_entry_t entry;
90 vm_object_t object;
91 vm_map_t map;
92 int paging;
93 struct thread *td;
94
95 totalp = &total;
96 bzero(totalp, sizeof *totalp);
97 /*
98 * Mark all objects as inactive.
99 */
100 GIANT_REQUIRED;
101 mtx_lock(&vm_object_list_mtx);
102 TAILQ_FOREACH(object, &vm_object_list, object_list) {
103 VM_OBJECT_LOCK(object);
104 vm_object_clear_flag(object, OBJ_ACTIVE);
105 VM_OBJECT_UNLOCK(object);
106 }
107 mtx_unlock(&vm_object_list_mtx);
108 /*
109 * Calculate process statistics.
110 */
111 sx_slock(&allproc_lock);
112 FOREACH_PROC_IN_SYSTEM(p) {
113 if (p->p_flag & P_SYSTEM)
114 continue;
115 mtx_lock_spin(&sched_lock);
116 switch (p->p_state) {
117 case PRS_NEW:
118 mtx_unlock_spin(&sched_lock);
119 continue;
120 break;
121 default:
122 FOREACH_THREAD_IN_PROC(p, td) {
123 /* Need new statistics XXX */
124 switch (td->td_state) {
125 case TDS_INHIBITED:
126 if (TD_ON_LOCK(td) ||
127 (td->td_inhibitors ==
128 TDI_SWAPPED)) {
129 totalp->t_sw++;
130 } else if (TD_IS_SLEEPING(td) ||
131 TD_AWAITING_INTR(td) ||
132 TD_IS_SUSPENDED(td)) {
133 if (td->td_priority <= PZERO)
134 totalp->t_dw++;
135 else
136 totalp->t_sl++;
137 }
138 break;
139
140 case TDS_CAN_RUN:
141 totalp->t_sw++;
142 break;
143 case TDS_RUNQ:
144 case TDS_RUNNING:
145 totalp->t_rq++;
146 continue;
147 default:
148 break;
149 }
150 }
151 }
152 mtx_unlock_spin(&sched_lock);
153 /*
154 * Note active objects.
155 */
156 paging = 0;
157 map = &p->p_vmspace->vm_map;
158 vm_map_lock_read(map);
159 for (entry = map->header.next;
160 entry != &map->header; entry = entry->next) {
161 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) ||
162 (object = entry->object.vm_object) == NULL)
163 continue;
164 VM_OBJECT_LOCK(object);
165 vm_object_set_flag(object, OBJ_ACTIVE);
166 paging |= object->paging_in_progress;
167 VM_OBJECT_UNLOCK(object);
168 }
169 vm_map_unlock_read(map);
170 if (paging)
171 totalp->t_pw++;
172 }
173 sx_sunlock(&allproc_lock);
174 /*
175 * Calculate object memory usage statistics.
176 */
177 mtx_lock(&vm_object_list_mtx);
178 TAILQ_FOREACH(object, &vm_object_list, object_list) {
179 VM_OBJECT_LOCK(object);
180 /*
181 * devices, like /dev/mem, will badly skew our totals
182 */
183 if (object->type == OBJT_DEVICE) {
184 VM_OBJECT_UNLOCK(object);
185 continue;
186 }
187 totalp->t_vm += object->size;
188 totalp->t_rm += object->resident_page_count;
189 if (object->flags & OBJ_ACTIVE) {
190 totalp->t_avm += object->size;
191 totalp->t_arm += object->resident_page_count;
192 }
193 if (object->shadow_count > 1) {
194 /* shared object */
195 totalp->t_vmshr += object->size;
196 totalp->t_rmshr += object->resident_page_count;
197 if (object->flags & OBJ_ACTIVE) {
198 totalp->t_avmshr += object->size;
199 totalp->t_armshr += object->resident_page_count;
200 }
201 }
202 VM_OBJECT_UNLOCK(object);
203 }
204 mtx_unlock(&vm_object_list_mtx);
205 totalp->t_free = cnt.v_free_count + cnt.v_cache_count;
206 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
207 }
208
209 /*
210 * vcnt() - accumulate statistics from all cpus and the global cnt
211 * structure.
212 *
213 * The vmmeter structure is now per-cpu as well as global. Those
214 * statistics which can be kept on a per-cpu basis (to avoid cache
215 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining
216 * statistics, such as v_free_reserved, are left in the global
217 * structure.
218 *
219 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
220 */
221 static int
222 vcnt(SYSCTL_HANDLER_ARGS)
223 {
224 int error = 0;
225 int count = *(int *)arg1;
226 #ifdef SMP
227 int i;
228 int offset = (char *)arg1 - (char *)&cnt;
229
230 for (i = 0; i < mp_ncpus; ++i) {
231 struct pcpu *pcpu = pcpu_find(i);
232 count += *(int *)((char *)&pcpu->pc_cnt + offset);
233 }
234 #else
235 int offset = (char *)arg1 - (char *)&cnt;
236 count += *(int *)((char *)PCPU_PTR(cnt) + offset);
237 #endif
238 error = SYSCTL_OUT(req, &count, sizeof(int));
239 return(error);
240 }
241
242 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
243 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal",
244 "System virtual memory statistics");
245 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
246 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
247 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
248 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
249
250 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
251 &cnt.v_swtch, 0, vcnt, "IU", "Context switches");
252 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
253 &cnt.v_trap, 0, vcnt, "IU", "Traps");
254 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
255 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls");
256 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
257 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts");
258 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
259 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts");
260 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
261 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults");
262 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
263 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults");
264 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
265 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults");
266 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
267 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill");
268 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
269 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill");
270 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
271 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations");
272 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
273 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations");
274 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
275 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages");
276 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
277 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages");
278 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
279 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations");
280 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
281 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations");
282 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
283 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages");
284 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
285 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages");
286 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
287 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking");
288 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
289 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages");
290 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
291 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups");
292 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
293 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans");
294 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
295 &cnt.v_dfree, 0, vcnt, "IU", "");
296 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
297 &cnt.v_pfree, 0, vcnt, "IU", "");
298 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
299 &cnt.v_tfree, 0, vcnt, "IU", "");
300 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD,
301 &cnt.v_page_size, 0, vcnt, "IU", "");
302 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD,
303 &cnt.v_page_count, 0, vcnt, "IU", "");
304 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD,
305 &cnt.v_free_reserved, 0, vcnt, "IU", "");
306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD,
307 &cnt.v_free_target, 0, vcnt, "IU", "");
308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD,
309 &cnt.v_free_min, 0, vcnt, "IU", "");
310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD,
311 &cnt.v_free_count, 0, vcnt, "IU", "");
312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD,
313 &cnt.v_wire_count, 0, vcnt, "IU", "");
314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD,
315 &cnt.v_active_count, 0, vcnt, "IU", "");
316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD,
317 &cnt.v_inactive_target, 0, vcnt, "IU", "");
318 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD,
319 &cnt.v_inactive_count, 0, vcnt, "IU", "");
320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD,
321 &cnt.v_cache_count, 0, vcnt, "IU", "");
322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD,
323 &cnt.v_cache_min, 0, vcnt, "IU", "");
324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD,
325 &cnt.v_cache_max, 0, vcnt, "IU", "");
326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD,
327 &cnt.v_pageout_free_min, 0, vcnt, "IU", "");
328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD,
329 &cnt.v_interrupt_free_min, 0, vcnt, "IU", "");
330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
331 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls");
332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
333 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls");
334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
335 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls");
336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
337 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel");
338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
339 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()");
340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
341 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()");
342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
343 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()");
344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
345 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel");
346
347 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
348 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");
349 #if 0
350 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
351 page_mask, CTLFLAG_RD, &page_mask, 0, "");
352 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
353 page_shift, CTLFLAG_RD, &page_shift, 0, "");
354 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
355 first_page, CTLFLAG_RD, &first_page, 0, "");
356 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
357 last_page, CTLFLAG_RD, &last_page, 0, "");
358 #endif
Cache object: 073a6a2cbd5e11f791c692e603dfbc79
|