Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_meter.c
Version:
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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: releng/5.0/sys/vm/vm_meter.c 104387 2002-10-02 20:31:47Z jhb $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 #include <sys/proc.h> 43 #include <sys/resource.h> 44 #include <sys/sx.h> 45 #include <sys/vmmeter.h> 46 #include <sys/smp.h> 47 48 #include <vm/vm.h> 49 #include <vm/vm_page.h> 50 #include <vm/vm_extern.h> 51 #include <vm/vm_param.h> 52 #include <vm/pmap.h> 53 #include <vm/vm_map.h> 54 #include <vm/vm_object.h> 55 #include <sys/sysctl.h> 56 57 struct vmmeter cnt; 58 59 int maxslp = MAXSLP; 60 61 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 62 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 63 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 64 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 65 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 66 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 67 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 68 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 69 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 70 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 71 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 72 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 73 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 74 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 75 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 76 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 77 78 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 79 &averunnable, loadavg, "Machine loadaverage history"); 80 81 static int 82 vmtotal(SYSCTL_HANDLER_ARGS) 83 { 84 /* XXXKSE almost completely broken */ 85 struct proc *p; 86 struct vmtotal total, *totalp; 87 vm_map_entry_t entry; 88 vm_object_t object; 89 vm_map_t map; 90 int paging; 91 struct thread *td; 92 93 totalp = &total; 94 bzero(totalp, sizeof *totalp); 95 /* 96 * Mark all objects as inactive. 97 */ 98 GIANT_REQUIRED; 99 mtx_lock(&vm_object_list_mtx); 100 TAILQ_FOREACH(object, &vm_object_list, object_list) 101 vm_object_clear_flag(object, OBJ_ACTIVE); 102 mtx_unlock(&vm_object_list_mtx); 103 /* 104 * Calculate process statistics. 105 */ 106 sx_slock(&allproc_lock); 107 FOREACH_PROC_IN_SYSTEM(p) { 108 if (p->p_flag & P_SYSTEM) 109 continue; 110 mtx_lock_spin(&sched_lock); 111 switch (p->p_state) { 112 case PRS_NEW: 113 mtx_unlock_spin(&sched_lock); 114 continue; 115 break; 116 default: 117 FOREACH_THREAD_IN_PROC(p, td) { 118 /* Need new statistics XXX */ 119 switch (td->td_state) { 120 case TDS_INHIBITED: 121 if (TD_ON_LOCK(td) || 122 (td->td_inhibitors == 123 TDI_SWAPPED)) { 124 totalp->t_sw++; 125 } else if (TD_IS_SLEEPING(td) || 126 TD_AWAITING_INTR(td) || 127 TD_IS_SUSPENDED(td)) { 128 if (td->td_priority <= PZERO) 129 totalp->t_dw++; 130 else 131 totalp->t_sl++; 132 } 133 break; 134 135 case TDS_CAN_RUN: 136 totalp->t_sw++; 137 break; 138 case TDS_RUNQ: 139 case TDS_RUNNING: 140 totalp->t_rq++; 141 continue; 142 default: 143 break; 144 } 145 } 146 } 147 mtx_unlock_spin(&sched_lock); 148 /* 149 * Note active objects. 150 */ 151 paging = 0; 152 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 153 entry != &map->header; entry = entry->next) { 154 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 155 entry->object.vm_object == NULL) 156 continue; 157 vm_object_set_flag(entry->object.vm_object, OBJ_ACTIVE); 158 paging |= entry->object.vm_object->paging_in_progress; 159 } 160 if (paging) 161 totalp->t_pw++; 162 } 163 sx_sunlock(&allproc_lock); 164 /* 165 * Calculate object memory usage statistics. 166 */ 167 mtx_lock(&vm_object_list_mtx); 168 TAILQ_FOREACH(object, &vm_object_list, object_list) { 169 /* 170 * devices, like /dev/mem, will badly skew our totals 171 */ 172 if (object->type == OBJT_DEVICE) 173 continue; 174 totalp->t_vm += object->size; 175 totalp->t_rm += object->resident_page_count; 176 if (object->flags & OBJ_ACTIVE) { 177 totalp->t_avm += object->size; 178 totalp->t_arm += object->resident_page_count; 179 } 180 if (object->shadow_count > 1) { 181 /* shared object */ 182 totalp->t_vmshr += object->size; 183 totalp->t_rmshr += object->resident_page_count; 184 if (object->flags & OBJ_ACTIVE) { 185 totalp->t_avmshr += object->size; 186 totalp->t_armshr += object->resident_page_count; 187 } 188 } 189 } 190 mtx_unlock(&vm_object_list_mtx); 191 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 192 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 193 } 194 195 /* 196 * vcnt() - accumulate statistics from all cpus and the global cnt 197 * structure. 198 * 199 * The vmmeter structure is now per-cpu as well as global. Those 200 * statistics which can be kept on a per-cpu basis (to avoid cache 201 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 202 * statistics, such as v_free_reserved, are left in the global 203 * structure. 204 * 205 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 206 */ 207 static int 208 vcnt(SYSCTL_HANDLER_ARGS) 209 { 210 int error = 0; 211 int count = *(int *)arg1; 212 #ifdef SMP 213 int i; 214 int offset = (char *)arg1 - (char *)&cnt; 215 216 for (i = 0; i < mp_ncpus; ++i) { 217 struct pcpu *pcpu = pcpu_find(i); 218 count += *(int *)((char *)&pcpu->pc_cnt + offset); 219 } 220 #endif 221 error = SYSCTL_OUT(req, &count, sizeof(int)); 222 return(error); 223 } 224 225 SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 226 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 227 "System virtual memory statistics"); 228 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 229 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 230 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 231 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 232 233 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 234 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 235 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 236 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 237 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 238 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 239 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 240 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 241 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 242 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 243 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 244 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 245 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 246 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 247 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 248 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 249 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 250 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 251 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 252 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 253 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 254 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 255 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 256 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 257 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 258 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 259 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 260 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 261 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 262 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 263 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 264 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 265 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 266 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 267 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 268 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 269 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 270 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 271 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 272 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 273 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 274 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 275 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 276 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 277 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 278 &cnt.v_dfree, 0, vcnt, "IU", ""); 279 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 280 &cnt.v_pfree, 0, vcnt, "IU", ""); 281 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 282 &cnt.v_tfree, 0, vcnt, "IU", ""); 283 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD, 284 &cnt.v_page_size, 0, vcnt, "IU", ""); 285 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD, 286 &cnt.v_page_count, 0, vcnt, "IU", ""); 287 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD, 288 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 289 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD, 290 &cnt.v_free_target, 0, vcnt, "IU", ""); 291 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD, 292 &cnt.v_free_min, 0, vcnt, "IU", ""); 293 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD, 294 &cnt.v_free_count, 0, vcnt, "IU", ""); 295 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD, 296 &cnt.v_wire_count, 0, vcnt, "IU", ""); 297 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD, 298 &cnt.v_active_count, 0, vcnt, "IU", ""); 299 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD, 300 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 301 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD, 302 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 303 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD, 304 &cnt.v_cache_count, 0, vcnt, "IU", ""); 305 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD, 306 &cnt.v_cache_min, 0, vcnt, "IU", ""); 307 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD, 308 &cnt.v_cache_max, 0, vcnt, "IU", ""); 309 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD, 310 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD, 312 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 314 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 316 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 318 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 320 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 322 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 323 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 324 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 325 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 326 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 327 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 328 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 329 330 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 331 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 332 #if 0 333 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 334 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 335 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 336 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 337 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 338 first_page, CTLFLAG_RD, &first_page, 0, ""); 339 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 340 last_page, CTLFLAG_RD, &last_page, 0, ""); 341 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 342 vm_page_bucket_count, CTLFLAG_RD, &vm_page_bucket_count, 0, ""); 343 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 344 vm_page_hash_mask, CTLFLAG_RD, &vm_page_hash_mask, 0, ""); 345 #endif
Cache object: 71a64fe45940b5cf5bc5935581533bf8
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