xref: /dflybsd-src/sys/vm/vm_meter.c (revision 744c01d0dc2aa1481a40e5b0988d15691602f5c9)
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  * $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 1.10 2006/09/11 20:25:31 dillon Exp $
36  */
37 
38 #include <sys/param.h>
39 #include <sys/proc.h>
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/resource.h>
43 #include <sys/vmmeter.h>
44 
45 #include <vm/vm.h>
46 #include <vm/vm_page.h>
47 #include <vm/vm_extern.h>
48 #include <vm/vm_param.h>
49 #include <sys/lock.h>
50 #include <vm/pmap.h>
51 #include <vm/vm_map.h>
52 #include <vm/vm_object.h>
53 #include <sys/sysctl.h>
54 
55 struct vmstats vmstats;
56 
57 static int maxslp = MAXSLP;
58 
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, "");
75 
76 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
77     &averunnable, loadavg, "Machine loadaverage history");
78 
79 static int do_vmtotal_callback(struct proc *p, void *data);
80 
81 static int
82 do_vmtotal(SYSCTL_HANDLER_ARGS)
83 {
84 	struct vmtotal total;
85 	struct vmtotal *totalp;
86 	vm_object_t object;
87 
88 	totalp = &total;
89 	bzero(totalp, sizeof *totalp);
90 
91 	/*
92 	 * Mark all objects as inactive.
93 	 */
94 	for (object = TAILQ_FIRST(&vm_object_list);
95 	    object != NULL;
96 	    object = TAILQ_NEXT(object,object_list)) {
97 		vm_object_clear_flag(object, OBJ_ACTIVE);
98 	}
99 
100 	/*
101 	 * Calculate process statistics.
102 	 */
103 	allproc_scan(do_vmtotal_callback, totalp);
104 
105 	/*
106 	 * Calculate object memory usage statistics.
107 	 */
108 	for (object = TAILQ_FIRST(&vm_object_list);
109 	    object != NULL;
110 	    object = TAILQ_NEXT(object, object_list)) {
111 		/*
112 		 * devices, like /dev/mem, will badly skew our totals
113 		 */
114 		if (object->type == OBJT_DEVICE)
115 			continue;
116 		totalp->t_vm += object->size;
117 		totalp->t_rm += object->resident_page_count;
118 		if (object->flags & OBJ_ACTIVE) {
119 			totalp->t_avm += object->size;
120 			totalp->t_arm += object->resident_page_count;
121 		}
122 		if (object->shadow_count > 1) {
123 			/* shared object */
124 			totalp->t_vmshr += object->size;
125 			totalp->t_rmshr += object->resident_page_count;
126 			if (object->flags & OBJ_ACTIVE) {
127 				totalp->t_avmshr += object->size;
128 				totalp->t_armshr += object->resident_page_count;
129 			}
130 		}
131 	}
132 	totalp->t_free = vmstats.v_free_count + vmstats.v_cache_count;
133 	return (sysctl_handle_opaque(oidp, totalp, sizeof total, req));
134 }
135 
136 static int
137 do_vmtotal_callback(struct proc *p, void *data)
138 {
139 	struct vmtotal *totalp = data;
140 	vm_map_entry_t entry;
141 	vm_map_t map;
142 	int paging;
143 
144 	if (p->p_flag & P_SYSTEM)
145 		return(0);
146 
147 	switch (p->p_stat) {
148 	case 0:
149 		return(0);
150 	case SSLEEP:
151 		if ((p->p_flag & P_SWAPPEDOUT) == 0) {
152 			if ((p->p_flag & P_SINTR) == 0)
153 				totalp->t_dw++;
154 			else if (p->p_slptime < maxslp)
155 				totalp->t_sl++;
156 		} else if (p->p_slptime < maxslp) {
157 			totalp->t_sw++;
158 		}
159 		if (p->p_slptime >= maxslp)
160 			return(0);
161 		break;
162 
163 	case SRUN:
164 	case SIDL:
165 		if (p->p_flag & P_SWAPPEDOUT)
166 			totalp->t_sw++;
167 		else
168 			totalp->t_rq++;
169 		if (p->p_stat == SIDL)
170 			return(0);
171 		break;
172 	}
173 	/*
174 	 * Note active objects.
175 	 */
176 	paging = 0;
177 	for (map = &p->p_vmspace->vm_map, entry = map->header.next;
178 	    entry != &map->header; entry = entry->next) {
179 		if (entry->maptype != VM_MAPTYPE_NORMAL &&
180 		    entry->maptype != VM_MAPTYPE_VPAGETABLE) {
181 			continue;
182 		}
183 		if (entry->object.vm_object == NULL)
184 			continue;
185 		vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE);
186 		paging |= entry->object.vm_object->paging_in_progress;
187 	}
188 	if (paging)
189 		totalp->t_pw++;
190 	return(0);
191 }
192 
193 
194 static int
195 do_vmstats(SYSCTL_HANDLER_ARGS)
196 {
197 	struct vmstats vms = vmstats;
198 	return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
199 }
200 
201 static int
202 do_vmmeter(SYSCTL_HANDLER_ARGS)
203 {
204 	int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
205 	int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
206 	struct vmmeter vmm;
207 	int i;
208 
209 	bzero(&vmm, sizeof(vmm));
210 	for (i = 0; i < ncpus; ++i) {
211 		int off;
212 		struct globaldata *gd = globaldata_find(i);
213 
214 		for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
215 			*(u_int *)((char *)&vmm + off) +=
216 				*(u_int *)((char *)&gd->gd_cnt + off);
217 		}
218 
219 	}
220 	return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
221 }
222 
223 /*
224  * vcnt() -	accumulate statistics from the cnt structure for each cpu
225  *
226  *	The vmmeter structure is now per-cpu as well as global.  Those
227  *	statistics which can be kept on a per-cpu basis (to avoid cache
228  *	stalls between cpus) can be moved to the per-cpu vmmeter.  Remaining
229  *	statistics, such as v_free_reserved, are left in the global
230  *	structure.
231  *
232  * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
233  */
234 static int
235 vcnt(SYSCTL_HANDLER_ARGS)
236 {
237 	int i;
238 	int count = 0;
239 	int offset = arg2;
240 
241 	for (i = 0; i < ncpus; ++i) {
242 		struct globaldata *gd = globaldata_find(i);
243 		count += *(int *)((char *)&gd->gd_cnt + offset);
244 	}
245 	return(SYSCTL_OUT(req, &count, sizeof(int)));
246 }
247 
248 #define VMMETEROFF(var)	offsetof(struct vmmeter, var)
249 
250 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
251     0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
252     "System virtual memory aggregate");
253 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
254     0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
255     "System virtual memory statistics");
256 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
257     0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
258     "System per-cpu statistics");
259 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
260 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
261 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
262 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
263 
264 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
265 	0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
266 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
267 	0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "");
268 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
269 	0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "");
270 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
271 	0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "");
272 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
273 	0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "");
274 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
275 	0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "");
276 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
277 	0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
278 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
279 	0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
280 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
281 	0, VMMETEROFF(v_intr), vcnt, "IU", "Hardware interrupts");
282 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
283 	0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
284 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
285 	0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
286 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
287 	0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
288 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
289 	0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
290 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
291 	0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
292 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
293 	0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
294 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
295 	0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
296 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
297 	0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
298 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
299 	0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
300 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
301 	0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
302 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
303 	0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
304 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
305 	0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
307 	0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
309 	0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
311 	0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
313 	0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
315 	0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
317 	0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
318 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
319 	0, VMMETEROFF(v_dfree), vcnt, "IU", "");
320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
321 	0, VMMETEROFF(v_pfree), vcnt, "IU", "");
322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
323 	0, VMMETEROFF(v_tfree), vcnt, "IU", "");
324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
325 	0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
327 	0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
329 	0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
331 	0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
333 	0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
335 	0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
337 	0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
339 	0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
340 
341 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
342 	v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, "");
343 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
344 	v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, "");
345 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
346 	v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, "");
347 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
348 	v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, "");
349 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
350 	v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, "");
351 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
352 	v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, "");
353 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
354 	v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, "");
355 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
356 	v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, "");
357 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
358 	v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, "");
359 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
360 	v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, "");
361 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
362 	v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, "");
363 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
364 	v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, "");
365 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
366 	v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, "");
367 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
368 	v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, "");
369 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
370 	v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, "");
371 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
372 	zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");
373