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 1.15 2008/04/28 18:04:08 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 struct lwp *lp; 141 vm_map_entry_t entry; 142 vm_map_t map; 143 int paging; 144 145 if (p->p_flag & P_SYSTEM) 146 return(0); 147 148 FOREACH_LWP_IN_PROC(lp, p) { 149 switch (lp->lwp_stat) { 150 case LSSTOP: 151 case LSSLEEP: 152 if ((p->p_flag & P_SWAPPEDOUT) == 0) { 153 if ((lp->lwp_flag & LWP_SINTR) == 0) 154 totalp->t_dw++; 155 else if (lp->lwp_slptime < maxslp) 156 totalp->t_sl++; 157 } else if (lp->lwp_slptime < maxslp) { 158 totalp->t_sw++; 159 } 160 if (lp->lwp_slptime >= maxslp) 161 return(0); 162 break; 163 164 case LSRUN: 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 default: 174 return (0); 175 } 176 } 177 /* 178 * Note active objects. 179 */ 180 paging = 0; 181 if (p->p_vmspace) { 182 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 183 entry != &map->header; entry = entry->next) { 184 if (entry->maptype != VM_MAPTYPE_NORMAL && 185 entry->maptype != VM_MAPTYPE_VPAGETABLE) { 186 continue; 187 } 188 if (entry->object.vm_object == NULL) 189 continue; 190 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 191 paging |= entry->object.vm_object->paging_in_progress; 192 } 193 } 194 if (paging) 195 totalp->t_pw++; 196 return(0); 197 } 198 199 200 static int 201 do_vmstats(SYSCTL_HANDLER_ARGS) 202 { 203 struct vmstats vms = vmstats; 204 return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req)); 205 } 206 207 static int 208 do_vmmeter(SYSCTL_HANDLER_ARGS) 209 { 210 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin); 211 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end); 212 struct vmmeter vmm; 213 int i; 214 215 bzero(&vmm, sizeof(vmm)); 216 for (i = 0; i < ncpus; ++i) { 217 int off; 218 struct globaldata *gd = globaldata_find(i); 219 220 for (off = boffset; off <= eoffset; off += sizeof(u_int)) { 221 *(u_int *)((char *)&vmm + off) += 222 *(u_int *)((char *)&gd->gd_cnt + off); 223 } 224 225 } 226 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req)); 227 } 228 229 /* 230 * vcnt() - accumulate statistics from the cnt structure for each cpu 231 * 232 * The vmmeter structure is now per-cpu as well as global. Those 233 * statistics which can be kept on a per-cpu basis (to avoid cache 234 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 235 * statistics, such as v_free_reserved, are left in the global 236 * structure. 237 * 238 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 239 */ 240 static int 241 vcnt(SYSCTL_HANDLER_ARGS) 242 { 243 int i; 244 int count = 0; 245 int offset = arg2; 246 247 for (i = 0; i < ncpus; ++i) { 248 struct globaldata *gd = globaldata_find(i); 249 count += *(int *)((char *)&gd->gd_cnt + offset); 250 } 251 return(SYSCTL_OUT(req, &count, sizeof(int))); 252 } 253 254 #define VMMETEROFF(var) offsetof(struct vmmeter, var) 255 256 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 257 0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal", 258 "System virtual memory aggregate"); 259 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD, 260 0, sizeof(struct vmstats), do_vmstats, "S,vmstats", 261 "System virtual memory statistics"); 262 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 263 0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter", 264 "System per-cpu statistics"); 265 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 266 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 267 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 268 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 269 270 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 271 0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches"); 272 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD, 273 0, VMMETEROFF(v_intrans_coll), vcnt, "IU", ""); 274 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD, 275 0, VMMETEROFF(v_intrans_wait), vcnt, "IU", ""); 276 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD, 277 0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", ""); 278 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD, 279 0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", ""); 280 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD, 281 0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", ""); 282 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 283 0, VMMETEROFF(v_trap), vcnt, "IU", "Traps"); 284 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 285 0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls"); 286 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 287 0, VMMETEROFF(v_intr), vcnt, "IU", "Hardware interrupts"); 288 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 289 0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts"); 290 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 291 0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults"); 292 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 293 0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults"); 294 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 295 0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults"); 296 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 297 0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill"); 298 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 299 0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill"); 300 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 301 0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations"); 302 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 303 0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations"); 304 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 305 0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages"); 306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 307 0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages"); 308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 309 0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations"); 310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 311 0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations"); 312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 313 0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages"); 314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 315 0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages"); 316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 317 0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking"); 318 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 319 0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages"); 320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 321 0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups"); 322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 323 0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans"); 324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 325 0, VMMETEROFF(v_dfree), vcnt, "IU", ""); 326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 327 0, VMMETEROFF(v_pfree), vcnt, "IU", ""); 328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 329 0, VMMETEROFF(v_tfree), vcnt, "IU", ""); 330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 331 0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls"); 332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 333 0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls"); 334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 335 0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls"); 336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 337 0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel"); 338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 339 0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()"); 340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 341 0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()"); 342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 343 0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()"); 344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 345 0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel"); 346 347 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 348 v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, ""); 349 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 350 v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, ""); 351 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 352 v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, ""); 353 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 354 v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, ""); 355 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 356 v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, ""); 357 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 358 v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, ""); 359 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 360 v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, ""); 361 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 362 v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, ""); 363 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 364 v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, ""); 365 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 366 v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, ""); 367 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 368 v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, ""); 369 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 370 v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, ""); 371 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 372 v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, ""); 373 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 374 v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, ""); 375 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 376 v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, ""); 377 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 378 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 379