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 1.7 2003/07/19 21:14:53 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 80 do_vmtotal(SYSCTL_HANDLER_ARGS) 81 { 82 struct proc *p; 83 struct vmtotal total, *totalp; 84 vm_map_entry_t entry; 85 vm_object_t object; 86 vm_map_t map; 87 int paging; 88 89 totalp = &total; 90 bzero(totalp, sizeof *totalp); 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 * Calculate process statistics. 100 */ 101 for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { 102 if (p->p_flag & P_SYSTEM) 103 continue; 104 switch (p->p_stat) { 105 case 0: 106 continue; 107 108 case SSLEEP: 109 case SSTOP: 110 if (p->p_flag & P_INMEM) { 111 if ((p->p_flag & P_SINTR) == 0) 112 totalp->t_dw++; 113 else if (p->p_slptime < maxslp) 114 totalp->t_sl++; 115 } else if (p->p_slptime < maxslp) 116 totalp->t_sw++; 117 if (p->p_slptime >= maxslp) 118 continue; 119 break; 120 121 case SRUN: 122 case SIDL: 123 if (p->p_flag & P_INMEM) 124 totalp->t_rq++; 125 else 126 totalp->t_sw++; 127 if (p->p_stat == SIDL) 128 continue; 129 break; 130 } 131 /* 132 * Note active objects. 133 */ 134 paging = 0; 135 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 136 entry != &map->header; entry = entry->next) { 137 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 138 entry->object.vm_object == NULL) 139 continue; 140 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 141 paging |= entry->object.vm_object->paging_in_progress; 142 } 143 if (paging) 144 totalp->t_pw++; 145 } 146 /* 147 * Calculate object memory usage statistics. 148 */ 149 for (object = TAILQ_FIRST(&vm_object_list); 150 object != NULL; 151 object = TAILQ_NEXT(object, object_list)) { 152 /* 153 * devices, like /dev/mem, will badly skew our totals 154 */ 155 if (object->type == OBJT_DEVICE) 156 continue; 157 totalp->t_vm += object->size; 158 totalp->t_rm += object->resident_page_count; 159 if (object->flags & OBJ_ACTIVE) { 160 totalp->t_avm += object->size; 161 totalp->t_arm += object->resident_page_count; 162 } 163 if (object->shadow_count > 1) { 164 /* shared object */ 165 totalp->t_vmshr += object->size; 166 totalp->t_rmshr += object->resident_page_count; 167 if (object->flags & OBJ_ACTIVE) { 168 totalp->t_avmshr += object->size; 169 totalp->t_armshr += object->resident_page_count; 170 } 171 } 172 } 173 totalp->t_free = vmstats.v_free_count + vmstats.v_cache_count; 174 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 175 } 176 177 static int 178 do_vmstats(SYSCTL_HANDLER_ARGS) 179 { 180 struct vmstats vms = vmstats; 181 return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req)); 182 } 183 184 static int 185 do_vmmeter(SYSCTL_HANDLER_ARGS) 186 { 187 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin); 188 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end); 189 struct vmmeter vmm; 190 int i; 191 192 bzero(&vmm, sizeof(vmm)); 193 for (i = 0; i < ncpus; ++i) { 194 int off; 195 struct globaldata *gd = globaldata_find(i); 196 197 for (off = boffset; off <= eoffset; off += sizeof(u_int)) { 198 *(u_int *)((char *)&vmm + off) += 199 *(u_int *)((char *)&gd->gd_cnt + off); 200 } 201 202 } 203 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req)); 204 } 205 206 /* 207 * vcnt() - accumulate statistics from the cnt structure for each cpu 208 * 209 * The vmmeter structure is now per-cpu as well as global. Those 210 * statistics which can be kept on a per-cpu basis (to avoid cache 211 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 212 * statistics, such as v_free_reserved, are left in the global 213 * structure. 214 * 215 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 216 */ 217 static int 218 vcnt(SYSCTL_HANDLER_ARGS) 219 { 220 int i; 221 int count = 0; 222 int offset = arg2; 223 224 for (i = 0; i < ncpus; ++i) { 225 struct globaldata *gd = globaldata_find(i); 226 count += *(int *)((char *)&gd->gd_cnt + offset); 227 } 228 return(SYSCTL_OUT(req, &count, sizeof(int))); 229 } 230 231 #define VMMETEROFF(var) offsetof(struct vmmeter, var) 232 233 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 234 0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal", 235 "System virtual memory aggregate"); 236 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD, 237 0, sizeof(struct vmstats), do_vmstats, "S,vmstats", 238 "System virtual memory statistics"); 239 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 240 0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter", 241 "System per-cpu statistics"); 242 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 243 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 244 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 245 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 246 247 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 248 0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches"); 249 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD, 250 0, VMMETEROFF(v_intrans_coll), vcnt, "IU", ""); 251 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD, 252 0, VMMETEROFF(v_intrans_wait), vcnt, "IU", ""); 253 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD, 254 0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", ""); 255 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD, 256 0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", ""); 257 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD, 258 0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", ""); 259 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 260 0, VMMETEROFF(v_trap), vcnt, "IU", "Traps"); 261 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 262 0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls"); 263 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 264 0, VMMETEROFF(v_intr), vcnt, "IU", "Hardware interrupts"); 265 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 266 0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts"); 267 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 268 0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults"); 269 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 270 0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults"); 271 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 272 0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults"); 273 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 274 0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill"); 275 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 276 0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill"); 277 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 278 0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations"); 279 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 280 0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations"); 281 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 282 0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages"); 283 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 284 0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages"); 285 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 286 0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations"); 287 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 288 0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations"); 289 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 290 0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages"); 291 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 292 0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages"); 293 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 294 0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking"); 295 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 296 0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages"); 297 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 298 0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups"); 299 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 300 0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans"); 301 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 302 0, VMMETEROFF(v_dfree), vcnt, "IU", ""); 303 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 304 0, VMMETEROFF(v_pfree), vcnt, "IU", ""); 305 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 306 0, VMMETEROFF(v_tfree), vcnt, "IU", ""); 307 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 308 0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls"); 309 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 310 0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls"); 311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 312 0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls"); 313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 314 0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel"); 315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 316 0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()"); 317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 318 0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()"); 319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 320 0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()"); 321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 322 0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel"); 323 324 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 325 v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, ""); 326 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 327 v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, ""); 328 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 329 v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, ""); 330 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 331 v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, ""); 332 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 333 v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, ""); 334 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 335 v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, ""); 336 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 337 v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, ""); 338 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 339 v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, ""); 340 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 341 v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, ""); 342 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 343 v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, ""); 344 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 345 v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, ""); 346 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 347 v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, ""); 348 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 349 v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, ""); 350 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 351 v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, ""); 352 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 353 v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, ""); 354 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 355 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 356