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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 #include <sys/resource.h> 42 #include <sys/sx.h> 43 #include <sys/vmmeter.h> 44 #include <sys/smp.h> 45 46 #include <vm/vm.h> 47 #include <vm/vm_page.h> 48 #include <vm/vm_extern.h> 49 #include <vm/vm_param.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 /* 56 * Virtual memory MPSAFE temporary workarounds. 57 */ 58 #if defined(__amd64__) || defined(__i386__) 59 int debug_mpsafevm = 1; 60 #else 61 int debug_mpsafevm; 62 #endif 63 TUNABLE_INT("debug.mpsafevm", &debug_mpsafevm); 64 SYSCTL_INT(_debug, OID_AUTO, mpsafevm, CTLFLAG_RD, &debug_mpsafevm, 0, 65 "Enable/disable MPSAFE virtual memory support"); 66 67 struct vmmeter cnt; 68 69 int maxslp = MAXSLP; 70 71 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 72 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 73 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 74 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 75 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 76 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 77 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 78 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 79 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 80 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 81 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 82 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 83 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 84 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 85 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 86 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 87 88 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 89 &averunnable, loadavg, "Machine loadaverage history"); 90 91 static int 92 vmtotal(SYSCTL_HANDLER_ARGS) 93 { 94 /* XXXKSE almost completely broken */ 95 struct proc *p; 96 struct vmtotal total, *totalp; 97 vm_map_entry_t entry; 98 vm_object_t object; 99 vm_map_t map; 100 int paging; 101 struct thread *td; 102 103 totalp = &total; 104 bzero(totalp, sizeof *totalp); 105 /* 106 * Mark all objects as inactive. 107 */ 108 GIANT_REQUIRED; 109 mtx_lock(&vm_object_list_mtx); 110 TAILQ_FOREACH(object, &vm_object_list, object_list) { 111 if (!VM_OBJECT_TRYLOCK(object)) { 112 /* 113 * Avoid a lock-order reversal. Consequently, 114 * the reported number of active pages may be 115 * greater than the actual number. 116 */ 117 continue; 118 } 119 vm_object_clear_flag(object, OBJ_ACTIVE); 120 VM_OBJECT_UNLOCK(object); 121 } 122 mtx_unlock(&vm_object_list_mtx); 123 /* 124 * Calculate process statistics. 125 */ 126 sx_slock(&allproc_lock); 127 FOREACH_PROC_IN_SYSTEM(p) { 128 if (p->p_flag & P_SYSTEM) 129 continue; 130 mtx_lock_spin(&sched_lock); 131 switch (p->p_state) { 132 case PRS_NEW: 133 mtx_unlock_spin(&sched_lock); 134 continue; 135 break; 136 default: 137 FOREACH_THREAD_IN_PROC(p, td) { 138 /* Need new statistics XXX */ 139 switch (td->td_state) { 140 case TDS_INHIBITED: 141 if (TD_ON_LOCK(td) || 142 (td->td_inhibitors == 143 TDI_SWAPPED)) { 144 totalp->t_sw++; 145 } else if (TD_IS_SLEEPING(td) || 146 TD_AWAITING_INTR(td) || 147 TD_IS_SUSPENDED(td)) { 148 if (td->td_priority <= PZERO) 149 totalp->t_dw++; 150 else 151 totalp->t_sl++; 152 } 153 break; 154 155 case TDS_CAN_RUN: 156 totalp->t_sw++; 157 break; 158 case TDS_RUNQ: 159 case TDS_RUNNING: 160 totalp->t_rq++; 161 continue; 162 default: 163 break; 164 } 165 } 166 } 167 mtx_unlock_spin(&sched_lock); 168 /* 169 * Note active objects. 170 */ 171 paging = 0; 172 map = &p->p_vmspace->vm_map; 173 vm_map_lock_read(map); 174 for (entry = map->header.next; 175 entry != &map->header; entry = entry->next) { 176 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 177 (object = entry->object.vm_object) == NULL) 178 continue; 179 VM_OBJECT_LOCK(object); 180 vm_object_set_flag(object, OBJ_ACTIVE); 181 paging |= object->paging_in_progress; 182 VM_OBJECT_UNLOCK(object); 183 } 184 vm_map_unlock_read(map); 185 if (paging) 186 totalp->t_pw++; 187 } 188 sx_sunlock(&allproc_lock); 189 /* 190 * Calculate object memory usage statistics. 191 */ 192 mtx_lock(&vm_object_list_mtx); 193 TAILQ_FOREACH(object, &vm_object_list, object_list) { 194 /* 195 * Perform unsynchronized reads on the object to avoid 196 * a lock-order reversal. In this case, the lack of 197 * synchronization should not impair the accuracy of 198 * the reported statistics. 199 */ 200 if (object->type == OBJT_DEVICE) { 201 /* 202 * Devices, like /dev/mem, will badly skew our totals. 203 */ 204 continue; 205 } 206 totalp->t_vm += object->size; 207 totalp->t_rm += object->resident_page_count; 208 if (object->flags & OBJ_ACTIVE) { 209 totalp->t_avm += object->size; 210 totalp->t_arm += object->resident_page_count; 211 } 212 if (object->shadow_count > 1) { 213 /* shared object */ 214 totalp->t_vmshr += object->size; 215 totalp->t_rmshr += object->resident_page_count; 216 if (object->flags & OBJ_ACTIVE) { 217 totalp->t_avmshr += object->size; 218 totalp->t_armshr += object->resident_page_count; 219 } 220 } 221 } 222 mtx_unlock(&vm_object_list_mtx); 223 totalp->t_free = cnt.v_free_count + cnt.v_cache_count; 224 return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); 225 } 226 227 /* 228 * vcnt() - accumulate statistics from all cpus and the global cnt 229 * structure. 230 * 231 * The vmmeter structure is now per-cpu as well as global. Those 232 * statistics which can be kept on a per-cpu basis (to avoid cache 233 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 234 * statistics, such as v_free_reserved, are left in the global 235 * structure. 236 * 237 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 238 */ 239 static int 240 vcnt(SYSCTL_HANDLER_ARGS) 241 { 242 int error = 0; 243 int count = *(int *)arg1; 244 #ifdef SMP 245 int i; 246 int offset = (char *)arg1 - (char *)&cnt; 247 248 for (i = 0; i < mp_ncpus; ++i) { 249 struct pcpu *pcpu = pcpu_find(i); 250 count += *(int *)((char *)&pcpu->pc_cnt + offset); 251 } 252 #else 253 int offset = (char *)arg1 - (char *)&cnt; 254 count += *(int *)((char *)PCPU_PTR(cnt) + offset); 255 #endif 256 error = SYSCTL_OUT(req, &count, sizeof(int)); 257 return(error); 258 } 259 260 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 261 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 262 "System virtual memory statistics"); 263 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 264 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 265 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 266 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 267 268 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 269 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 270 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 271 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 272 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 273 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 274 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 275 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 276 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 277 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 278 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 279 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 280 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 281 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 282 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 283 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 284 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 285 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 286 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 287 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 288 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 289 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 290 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 291 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 292 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 293 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 294 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 295 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 296 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 297 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 298 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 299 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 300 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 301 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 302 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 303 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 304 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 305 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 307 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 309 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 311 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 313 &cnt.v_dfree, 0, vcnt, "IU", ""); 314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 315 &cnt.v_pfree, 0, vcnt, "IU", ""); 316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 317 &cnt.v_tfree, 0, vcnt, "IU", ""); 318 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD, 319 &cnt.v_page_size, 0, vcnt, "IU", ""); 320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD, 321 &cnt.v_page_count, 0, vcnt, "IU", ""); 322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD, 323 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD, 325 &cnt.v_free_target, 0, vcnt, "IU", ""); 326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD, 327 &cnt.v_free_min, 0, vcnt, "IU", ""); 328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD, 329 &cnt.v_free_count, 0, vcnt, "IU", ""); 330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD, 331 &cnt.v_wire_count, 0, vcnt, "IU", ""); 332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD, 333 &cnt.v_active_count, 0, vcnt, "IU", ""); 334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD, 335 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD, 337 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD, 339 &cnt.v_cache_count, 0, vcnt, "IU", ""); 340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD, 341 &cnt.v_cache_min, 0, vcnt, "IU", ""); 342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD, 343 &cnt.v_cache_max, 0, vcnt, "IU", ""); 344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD, 345 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 346 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD, 347 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 348 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 349 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 350 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 351 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 352 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 353 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 354 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 355 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 356 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 357 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 358 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 359 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 360 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 361 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 362 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 363 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 364 365 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 366 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, ""); 367 #if 0 368 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 369 page_mask, CTLFLAG_RD, &page_mask, 0, ""); 370 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 371 page_shift, CTLFLAG_RD, &page_shift, 0, ""); 372 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 373 first_page, CTLFLAG_RD, &first_page, 0, ""); 374 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 375 last_page, CTLFLAG_RD, &last_page, 0, ""); 376 #endif 377