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31 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94
32 * $FreeBSD: src/sys/vm/vm_meter.c,v 1.34.2.7 2002/10/10 19:28:22 dillon Exp $
33 * $DragonFly: src/sys/vm/vm_meter.c,v 1.15 2008/04/28 18:04:08 dillon Exp $
36 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/resource.h>
41 #include <sys/vmmeter.h>
44 #include <vm/vm_page.h>
45 #include <vm/vm_extern.h>
46 #include <vm/vm_param.h>
49 #include <vm/vm_map.h>
50 #include <vm/vm_object.h>
51 #include <sys/sysctl.h>
53 struct vmstats vmstats;
55 static int maxslp = MAXSLP;
57 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
58 CTLFLAG_RW, &vmstats.v_free_min, 0,
59 "Minimum number of pages desired free");
60 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
61 CTLFLAG_RW, &vmstats.v_free_target, 0,
62 "Number of pages desired free");
63 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
64 CTLFLAG_RW, &vmstats.v_free_reserved, 0,
65 "Number of pages reserved for deadlock");
66 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
67 CTLFLAG_RW, &vmstats.v_inactive_target, 0,
68 "Number of pages desired inactive");
69 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
70 CTLFLAG_RW, &vmstats.v_cache_min, 0,
71 "Min number of pages desired on cache queue");
72 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
73 CTLFLAG_RW, &vmstats.v_cache_max, 0,
74 "Max number of pages in cached obj");
75 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
76 CTLFLAG_RW, &vmstats.v_pageout_free_min, 0,
77 "Min number pages reserved for kernel");
78 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
79 CTLFLAG_RW, &vmstats.v_free_severe, 0, "");
81 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD,
82 &averunnable, loadavg, "Machine loadaverage history");
84 static int do_vmtotal_callback(struct proc *p, void *data);
90 do_vmtotal(SYSCTL_HANDLER_ARGS)
96 bzero(&total, sizeof(total));
97 for (n = 0; n < ncpus; ++n) {
98 gd = globaldata_find(n);
100 /* total.t_rq calculated separately */
101 /* total.t_dw calculated separately */
102 /* total.t_pw calculated separately */
103 /* total.t_sl calculated separately */
104 /* total.t_sw calculated separately */
105 total.t_vm += gd->gd_vmtotal.t_vm;
106 total.t_avm += gd->gd_vmtotal.t_avm;
107 total.t_rm += gd->gd_vmtotal.t_rm;
108 total.t_arm += gd->gd_vmtotal.t_arm;
109 total.t_vmshr += gd->gd_vmtotal.t_vmshr;
110 total.t_avmshr += gd->gd_vmtotal.t_avmshr;
111 total.t_rmshr += gd->gd_vmtotal.t_rmshr;
112 total.t_armshr += gd->gd_vmtotal.t_armshr;
113 /* total.t_free calculated separately */
117 * Calculate process statistics.
119 allproc_scan(do_vmtotal_callback, &total);
122 * Adjust for sysctl return. Add real memory into virtual memory.
126 * t_vm - Virtual memory (real + swap)
128 total.t_vm += total.t_rm;
129 total.t_free = vmstats.v_free_count + vmstats.v_cache_count;
131 return (sysctl_handle_opaque(oidp, &total, sizeof(total), req));
135 * The caller must hold proc_token.
138 do_vmtotal_callback(struct proc *p, void *data)
140 struct vmtotal *totalp = data;
143 if (p->p_flags & P_SYSTEM)
146 FOREACH_LWP_IN_PROC(lp, p) {
147 switch (lp->lwp_stat) {
150 if ((p->p_flags & P_SWAPPEDOUT) == 0) {
151 if ((lp->lwp_flags & LWP_SINTR) == 0)
153 else if (lp->lwp_slptime < maxslp)
155 } else if (lp->lwp_slptime < maxslp) {
158 if (lp->lwp_slptime >= maxslp)
163 if (p->p_flags & P_SWAPPEDOUT)
167 if (p->p_stat == SIDL)
176 * Set while in vm_fault()
178 if (lp->lwp_flags & LWP_PAGING)
188 do_vmstats(SYSCTL_HANDLER_ARGS)
190 struct vmstats vms = vmstats;
191 return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
198 do_vmmeter(SYSCTL_HANDLER_ARGS)
200 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
201 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
205 bzero(&vmm, sizeof(vmm));
206 for (i = 0; i < ncpus; ++i) {
208 struct globaldata *gd = globaldata_find(i);
210 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
211 *(u_int *)((char *)&vmm + off) +=
212 *(u_int *)((char *)&gd->gd_cnt + off);
216 vmm.v_intr += vmm.v_ipi + vmm.v_timer;
217 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
221 * vcnt() - accumulate statistics from the cnt structure for each cpu
223 * The vmmeter structure is now per-cpu as well as global. Those
224 * statistics which can be kept on a per-cpu basis (to avoid cache
225 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining
226 * statistics, such as v_free_reserved, are left in the global
229 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
234 vcnt(SYSCTL_HANDLER_ARGS)
240 for (i = 0; i < ncpus; ++i) {
241 struct globaldata *gd = globaldata_find(i);
242 count += *(int *)((char *)&gd->gd_cnt + offset);
244 return(SYSCTL_OUT(req, &count, sizeof(int)));
251 vcnt_intr(SYSCTL_HANDLER_ARGS)
256 for (i = 0; i < ncpus; ++i) {
257 struct globaldata *gd = globaldata_find(i);
259 count += gd->gd_cnt.v_intr + gd->gd_cnt.v_ipi +
262 return(SYSCTL_OUT(req, &count, sizeof(int)));
265 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
267 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
268 0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal",
269 "System virtual memory aggregate");
270 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
271 0, sizeof(struct vmstats), do_vmstats, "S,vmstats",
272 "System virtual memory statistics");
273 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
274 0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter",
275 "System statistics");
276 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
277 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
278 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
279 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
281 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
282 0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
283 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
284 0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "Intransit map collisions (total)");
285 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
286 0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "Intransit map collisions which blocked");
287 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
288 0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "Forwarded interrupts due to MP lock");
289 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
290 0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "Forwarded hits due to MP lock");
291 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
292 0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "Forwarded misses due to MP lock");
293 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
294 0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
295 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
296 0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
297 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
298 0, VMMETEROFF(v_intr), vcnt_intr, "IU", "Hardware interrupts");
299 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_ipi, CTLTYPE_UINT|CTLFLAG_RD,
300 0, VMMETEROFF(v_ipi), vcnt, "IU", "Inter-processor interrupts");
301 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_timer, CTLTYPE_UINT|CTLFLAG_RD,
302 0, VMMETEROFF(v_timer), vcnt, "IU", "LAPIC timer interrupts");
303 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
304 0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
305 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
306 0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
307 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
308 0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
309 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
310 0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
312 0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
314 0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
316 0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
318 0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
320 0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
322 0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
323 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
324 0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
325 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
326 0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
327 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
328 0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
329 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
330 0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
331 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
332 0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
333 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
334 0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
335 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
336 0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
337 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ppwakeups, CTLTYPE_UINT|CTLFLAG_RD,
338 0, VMMETEROFF(v_ppwakeups), vcnt, "IU", "vm_wait wakeups");
339 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
340 0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
341 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
342 0, VMMETEROFF(v_dfree), vcnt, "IU", "Pages freed by daemon");
343 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
344 0, VMMETEROFF(v_pfree), vcnt, "IU", "Pages freed by exiting processes");
345 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
346 0, VMMETEROFF(v_tfree), vcnt, "IU", "Total pages freed");
347 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
348 0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
349 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
350 0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
351 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
352 0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
353 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
354 0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
355 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
356 0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
357 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
358 0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
359 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
360 0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
361 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
362 0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
364 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
365 v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0,
366 "Page size in bytes");
367 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
368 v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0,
369 "Total number of pages in system");
370 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
371 v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0,
372 "Number of pages reserved for deadlock");
373 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
374 v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0,
375 "Number of pages desired free");
376 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
377 v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0,
378 "Minimum number of pages desired free");
379 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
380 v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0,
381 "Number of pages free");
382 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
383 v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0,
384 "Number of pages wired down");
385 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
386 v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0,
387 "Number of pages active");
388 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
389 v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0,
390 "Number of pages desired inactive");
391 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
392 v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0,
393 "Number of pages inactive");
394 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
395 v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0,
396 "Number of pages on buffer cache queue");
397 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
398 v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0,
399 "Min number of pages desired on cache queue");
400 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
401 v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0,
402 "Max number of pages in cached obj");
403 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
404 v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0,
405 "Min number pages reserved for kernel");
406 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
407 v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0,
408 "Reserved number of pages for int code");
409 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
410 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0,
411 "Number of zeroing pages");
417 do_vmmeter_pcpu(SYSCTL_HANDLER_ARGS)
419 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
420 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
421 struct globaldata *gd = arg1;
425 bzero(&vmm, sizeof(vmm));
426 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
427 *(u_int *)((char *)&vmm + off) +=
428 *(u_int *)((char *)&gd->gd_cnt + off);
430 vmm.v_intr += vmm.v_ipi + vmm.v_timer;
431 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
435 * Called from the low level boot code only.
438 vmmeter_init(void *dummy __unused)
442 for (i = 0; i < ncpus; ++i) {
443 struct sysctl_ctx_list *ctx;
444 struct sysctl_oid *oid;
445 struct globaldata *gd;
448 ksnprintf(name, sizeof(name), "cpu%d", i);
450 ctx = kmalloc(sizeof(*ctx), M_TEMP, M_WAITOK);
451 sysctl_ctx_init(ctx);
452 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_vm),
453 OID_AUTO, name, CTLFLAG_RD, 0, "");
455 gd = globaldata_find(i);
456 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
457 "vmmeter", CTLTYPE_OPAQUE|CTLFLAG_RD,
458 gd, sizeof(struct vmmeter), do_vmmeter_pcpu,
459 "S,vmmeter", "System per-cpu statistics");
462 SYSINIT(vmmeter, SI_SUB_PSEUDO, SI_ORDER_ANY, vmmeter_init, 0);