1 /* 2 * (MPSAFE) 3 * 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 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 */ 34 35 #include <sys/param.h> 36 #include <sys/proc.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/malloc.h> 40 #include <sys/resource.h> 41 #include <sys/vmmeter.h> 42 #include <sys/kcollect.h> 43 44 #include <vm/vm.h> 45 #include <vm/vm_page.h> 46 #include <vm/vm_extern.h> 47 #include <vm/vm_param.h> 48 #include <sys/lock.h> 49 #include <vm/pmap.h> 50 #include <vm/vm_map.h> 51 #include <vm/vm_object.h> 52 #include <sys/sysctl.h> 53 54 /* 55 * WARNING: vmstats represents the final say, but individual cpu's may 56 * accumualte adjustments in gd->gd_vmstats_adj. These are 57 * synchronized to the global vmstats in hardclock. 58 * 59 * In addition, most individual cpus check vmstats using a local 60 * copy of the global vmstats in gd->gd_vmstats. Hardclock also 61 * sychronizes the copy. The pageout code and vm_page_alloc will 62 * also synchronize their local copies as necessary. 63 * 64 * Other consumers should not expect perfect values. 65 */ 66 __exclusive_cache_line struct vmstats vmstats; 67 68 static int maxslp = MAXSLP; 69 70 SYSCTL_ULONG(_vm, VM_V_FREE_MIN, v_free_min, 71 CTLFLAG_RW, &vmstats.v_free_min, 0, 72 "Minimum number of pages desired free"); 73 SYSCTL_ULONG(_vm, VM_V_FREE_TARGET, v_free_target, 74 CTLFLAG_RW, &vmstats.v_free_target, 0, 75 "Number of pages desired free"); 76 SYSCTL_ULONG(_vm, VM_V_FREE_RESERVED, v_free_reserved, 77 CTLFLAG_RW, &vmstats.v_free_reserved, 0, 78 "Number of pages reserved for deadlock"); 79 SYSCTL_ULONG(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 80 CTLFLAG_RW, &vmstats.v_inactive_target, 0, 81 "Number of pages desired inactive"); 82 SYSCTL_ULONG(_vm, VM_V_CACHE_MIN, v_cache_min, 83 CTLFLAG_RW, &vmstats.v_cache_min, 0, 84 "Min number of pages desired on cache queue"); 85 SYSCTL_ULONG(_vm, VM_V_CACHE_MAX, v_cache_max, 86 CTLFLAG_RW, &vmstats.v_cache_max, 0, 87 "Max number of pages in cached obj"); 88 SYSCTL_ULONG(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 89 CTLFLAG_RW, &vmstats.v_pageout_free_min, 0, 90 "Min number pages reserved for kernel"); 91 SYSCTL_ULONG(_vm, OID_AUTO, v_free_severe, 92 CTLFLAG_RW, &vmstats.v_free_severe, 0, ""); 93 94 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, 95 CTLFLAG_RD | CTLFLAG_NOLOCK, 96 &averunnable, loadavg, "Machine loadaverage history"); 97 98 static int do_vmtotal_callback(struct proc *p, void *data); 99 100 /* 101 * No requirements. 102 */ 103 static int 104 do_vmtotal(SYSCTL_HANDLER_ARGS) 105 { 106 struct vmtotal total; 107 globaldata_t gd; 108 int n; 109 110 bzero(&total, sizeof(total)); 111 for (n = 0; n < ncpus; ++n) { 112 gd = globaldata_find(n); 113 114 /* total.t_rq calculated separately */ 115 /* total.t_dw calculated separately */ 116 /* total.t_pw calculated separately */ 117 /* total.t_sl calculated separately */ 118 /* total.t_sw calculated separately */ 119 total.t_vm += gd->gd_vmtotal.t_vm; 120 total.t_avm += gd->gd_vmtotal.t_avm; 121 total.t_rm += gd->gd_vmtotal.t_rm; 122 total.t_arm += gd->gd_vmtotal.t_arm; 123 total.t_vmshr += gd->gd_vmtotal.t_vmshr; 124 total.t_avmshr += gd->gd_vmtotal.t_avmshr; 125 total.t_rmshr += gd->gd_vmtotal.t_rmshr; 126 total.t_armshr += gd->gd_vmtotal.t_armshr; 127 /* total.t_free calculated separately */ 128 } 129 130 /* 131 * Calculate process statistics. 132 */ 133 allproc_scan(do_vmtotal_callback, &total, 0); 134 135 /* 136 * Adjust for sysctl return. Add real memory into virtual memory. 137 * Set t_free. 138 * 139 * t_rm - Real memory 140 * t_vm - Virtual memory (real + swap) 141 */ 142 total.t_vm += total.t_rm; 143 total.t_free = vmstats.v_free_count + vmstats.v_cache_count; 144 145 return (sysctl_handle_opaque(oidp, &total, sizeof(total), req)); 146 } 147 148 static int 149 do_vmtotal_callback(struct proc *p, void *data) 150 { 151 struct vmtotal *totalp = data; 152 struct lwp *lp; 153 154 if (p->p_flags & P_SYSTEM) 155 return(0); 156 157 lwkt_gettoken_shared(&p->p_token); 158 159 FOREACH_LWP_IN_PROC(lp, p) { 160 switch (lp->lwp_stat) { 161 case LSSTOP: 162 case LSSLEEP: 163 if ((lp->lwp_flags & LWP_SINTR) == 0) 164 totalp->t_dw++; 165 else if (lp->lwp_slptime < maxslp) 166 totalp->t_sl++; 167 if (lp->lwp_slptime >= maxslp) 168 goto out; 169 break; 170 case LSRUN: 171 totalp->t_rq++; 172 if (p->p_stat == SIDL) 173 goto out; 174 break; 175 default: 176 goto out; 177 } 178 179 /* 180 * Set while in vm_fault() 181 */ 182 if (lp->lwp_flags & LWP_PAGING) 183 totalp->t_pw++; 184 } 185 out: 186 lwkt_reltoken(&p->p_token); 187 return(0); 188 } 189 190 /* 191 * No requirements. 192 */ 193 static int 194 do_vmstats(SYSCTL_HANDLER_ARGS) 195 { 196 struct vmstats vms = vmstats; 197 return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req)); 198 } 199 200 /* 201 * No requirements. 202 */ 203 static int 204 do_vmmeter(SYSCTL_HANDLER_ARGS) 205 { 206 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin); 207 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end); 208 struct vmmeter vmm; 209 int i; 210 211 bzero(&vmm, sizeof(vmm)); 212 for (i = 0; i < ncpus; ++i) { 213 int off; 214 struct globaldata *gd = globaldata_find(i); 215 216 for (off = boffset; off <= eoffset; off += sizeof(u_int)) { 217 *(u_int *)((char *)&vmm + off) += 218 *(u_int *)((char *)&gd->gd_cnt + off); 219 } 220 221 } 222 vmm.v_intr += vmm.v_ipi + vmm.v_timer; 223 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req)); 224 } 225 226 /* 227 * vcnt() - accumulate statistics from the cnt structure for each cpu 228 * 229 * The vmmeter structure is now per-cpu as well as global. Those 230 * statistics which can be kept on a per-cpu basis (to avoid cache 231 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 232 * statistics, such as v_free_reserved, are left in the global 233 * structure. 234 * 235 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 236 * 237 * No requirements. 238 */ 239 static int 240 vcnt(SYSCTL_HANDLER_ARGS) 241 { 242 int i; 243 int count = 0; 244 int offset = arg2; 245 246 for (i = 0; i < ncpus; ++i) { 247 struct globaldata *gd = globaldata_find(i); 248 count += *(int *)((char *)&gd->gd_cnt + offset); 249 } 250 return(SYSCTL_OUT(req, &count, sizeof(int))); 251 } 252 253 /* 254 * No requirements. 255 */ 256 static int 257 vcnt_intr(SYSCTL_HANDLER_ARGS) 258 { 259 int i; 260 int count = 0; 261 262 for (i = 0; i < ncpus; ++i) { 263 struct globaldata *gd = globaldata_find(i); 264 265 count += gd->gd_cnt.v_intr + gd->gd_cnt.v_ipi + 266 gd->gd_cnt.v_timer; 267 } 268 return(SYSCTL_OUT(req, &count, sizeof(int))); 269 } 270 271 #define VMMETEROFF(var) offsetof(struct vmmeter, var) 272 273 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 274 0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal", 275 "System virtual memory aggregate"); 276 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD, 277 0, sizeof(struct vmstats), do_vmstats, "S,vmstats", 278 "System virtual memory statistics"); 279 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 280 0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter", 281 "System statistics"); 282 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 283 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 284 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 285 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 286 287 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 288 0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches"); 289 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD, 290 0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "Intransit map collisions (total)"); 291 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD, 292 0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "Intransit map collisions which blocked"); 293 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD, 294 0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "Forwarded interrupts due to MP lock"); 295 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD, 296 0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "Forwarded hits due to MP lock"); 297 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD, 298 0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "Forwarded misses due to MP lock"); 299 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 300 0, VMMETEROFF(v_trap), vcnt, "IU", "Traps"); 301 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 302 0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls"); 303 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 304 0, VMMETEROFF(v_intr), vcnt_intr, "IU", "Hardware interrupts"); 305 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_ipi, CTLTYPE_UINT|CTLFLAG_RD, 306 0, VMMETEROFF(v_ipi), vcnt, "IU", "Inter-processor interrupts"); 307 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_timer, CTLTYPE_UINT|CTLFLAG_RD, 308 0, VMMETEROFF(v_timer), vcnt, "IU", "LAPIC timer interrupts"); 309 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 310 0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts"); 311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 312 0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults"); 313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 314 0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults"); 315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 316 0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults"); 317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 318 0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill"); 319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 320 0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill"); 321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 322 0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations"); 323 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 324 0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations"); 325 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 326 0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages"); 327 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 328 0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages"); 329 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 330 0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations"); 331 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 332 0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations"); 333 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 334 0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages"); 335 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 336 0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages"); 337 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 338 0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking"); 339 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 340 0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages"); 341 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 342 0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups"); 343 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ppwakeups, CTLTYPE_UINT|CTLFLAG_RD, 344 0, VMMETEROFF(v_ppwakeups), vcnt, "IU", "vm_wait wakeups"); 345 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 346 0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans"); 347 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 348 0, VMMETEROFF(v_dfree), vcnt, "IU", "Pages freed by daemon"); 349 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 350 0, VMMETEROFF(v_pfree), vcnt, "IU", "Pages freed by exiting processes"); 351 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 352 0, VMMETEROFF(v_tfree), vcnt, "IU", "Total pages freed"); 353 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 354 0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls"); 355 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 356 0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls"); 357 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 358 0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls"); 359 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 360 0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel"); 361 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 362 0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()"); 363 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 364 0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()"); 365 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 366 0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()"); 367 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 368 0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel"); 369 370 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 371 v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, 372 "Page size in bytes"); 373 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 374 v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, 375 "Total number of pages in system"); 376 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 377 v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, 378 "Number of pages reserved for deadlock"); 379 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 380 v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, 381 "Number of pages desired free"); 382 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 383 v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, 384 "Minimum number of pages desired free"); 385 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 386 v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, 387 "Number of pages free"); 388 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 389 v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, 390 "Number of pages wired down"); 391 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 392 v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, 393 "Number of pages active"); 394 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 395 v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, 396 "Number of pages desired inactive"); 397 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 398 v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, 399 "Number of pages inactive"); 400 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 401 v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, 402 "Number of pages on buffer cache queue"); 403 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 404 v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, 405 "Min number of pages desired on cache queue"); 406 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 407 v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, 408 "Max number of pages in cached obj"); 409 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 410 v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, 411 "Min number pages reserved for kernel"); 412 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 413 v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, 414 "Reserved number of pages for int code"); 415 416 /* 417 * No requirements. 418 */ 419 static int 420 do_vmmeter_pcpu(SYSCTL_HANDLER_ARGS) 421 { 422 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin); 423 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end); 424 struct globaldata *gd = arg1; 425 struct vmmeter vmm; 426 int off; 427 428 bzero(&vmm, sizeof(vmm)); 429 for (off = boffset; off <= eoffset; off += sizeof(u_int)) { 430 *(u_int *)((char *)&vmm + off) += 431 *(u_int *)((char *)&gd->gd_cnt + off); 432 } 433 vmm.v_intr += vmm.v_ipi + vmm.v_timer; 434 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req)); 435 } 436 437 /* 438 * Callback for long-term slow data collection on 10-second interval. 439 * 440 * Return faults, set data for other entries. 441 */ 442 #define PTOB(value) ((uint64_t)(value) << PAGE_SHIFT) 443 444 static uint64_t 445 collect_vmstats_callback(int n) 446 { 447 static struct vmmeter last_vmm; 448 struct vmmeter cur_vmm; 449 const int boffset = offsetof(struct vmmeter, vmmeter_uint_begin); 450 const int eoffset = offsetof(struct vmmeter, vmmeter_uint_end); 451 uint64_t total; 452 453 /* 454 * The hardclock already rolls up vmstats for us. 455 */ 456 kcollect_setvalue(KCOLLECT_MEMFRE, PTOB(vmstats.v_free_count)); 457 kcollect_setvalue(KCOLLECT_MEMCAC, PTOB(vmstats.v_cache_count)); 458 kcollect_setvalue(KCOLLECT_MEMINA, PTOB(vmstats.v_inactive_count)); 459 kcollect_setvalue(KCOLLECT_MEMACT, PTOB(vmstats.v_active_count)); 460 kcollect_setvalue(KCOLLECT_MEMWIR, PTOB(vmstats.v_wire_count)); 461 462 /* 463 * Collect pcpu statistics for things like faults. 464 */ 465 bzero(&cur_vmm, sizeof(cur_vmm)); 466 for (n = 0; n < ncpus; ++n) { 467 struct globaldata *gd = globaldata_find(n); 468 int off; 469 470 for (off = boffset; off <= eoffset; off += sizeof(u_int)) { 471 *(u_int *)((char *)&cur_vmm + off) += 472 *(u_int *)((char *)&gd->gd_cnt + off); 473 } 474 475 } 476 477 total = cur_vmm.v_cow_faults - last_vmm.v_cow_faults; 478 last_vmm.v_cow_faults = cur_vmm.v_cow_faults; 479 kcollect_setvalue(KCOLLECT_COWFAULT, total); 480 481 total = cur_vmm.v_zfod - last_vmm.v_zfod; 482 last_vmm.v_zfod = cur_vmm.v_zfod; 483 kcollect_setvalue(KCOLLECT_ZFILL, total); 484 485 total = cur_vmm.v_syscall - last_vmm.v_syscall; 486 last_vmm.v_syscall = cur_vmm.v_syscall; 487 kcollect_setvalue(KCOLLECT_SYSCALLS, total); 488 489 total = cur_vmm.v_intr - last_vmm.v_intr; 490 last_vmm.v_intr = cur_vmm.v_intr; 491 kcollect_setvalue(KCOLLECT_INTR, total); 492 493 total = cur_vmm.v_ipi - last_vmm.v_ipi; 494 last_vmm.v_ipi = cur_vmm.v_ipi; 495 kcollect_setvalue(KCOLLECT_IPI, total); 496 497 total = cur_vmm.v_timer - last_vmm.v_timer; 498 last_vmm.v_timer = cur_vmm.v_timer; 499 kcollect_setvalue(KCOLLECT_TIMER, total); 500 501 total = cur_vmm.v_vm_faults - last_vmm.v_vm_faults; 502 last_vmm.v_vm_faults = cur_vmm.v_vm_faults; 503 504 return total; 505 } 506 507 /* 508 * Called from the low level boot code only. 509 */ 510 static void 511 vmmeter_init(void *dummy __unused) 512 { 513 int i; 514 515 for (i = 0; i < ncpus; ++i) { 516 struct sysctl_ctx_list *ctx; 517 struct sysctl_oid *oid; 518 struct globaldata *gd; 519 char name[32]; 520 521 ksnprintf(name, sizeof(name), "cpu%d", i); 522 523 ctx = kmalloc(sizeof(*ctx), M_TEMP, M_WAITOK); 524 sysctl_ctx_init(ctx); 525 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_vm), 526 OID_AUTO, name, CTLFLAG_RD, 0, ""); 527 528 gd = globaldata_find(i); 529 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 530 "vmmeter", CTLTYPE_OPAQUE|CTLFLAG_RD, 531 gd, sizeof(struct vmmeter), do_vmmeter_pcpu, 532 "S,vmmeter", "System per-cpu statistics"); 533 } 534 kcollect_register(KCOLLECT_VMFAULT, "fault", collect_vmstats_callback, 535 KCOLLECT_SCALE(KCOLLECT_VMFAULT_FORMAT, 0)); 536 kcollect_register(KCOLLECT_COWFAULT, "cow", NULL, 537 KCOLLECT_SCALE(KCOLLECT_COWFAULT_FORMAT, 0)); 538 kcollect_register(KCOLLECT_ZFILL, "zfill", NULL, 539 KCOLLECT_SCALE(KCOLLECT_ZFILL_FORMAT, 0)); 540 541 kcollect_register(KCOLLECT_MEMFRE, "free", NULL, 542 KCOLLECT_SCALE(KCOLLECT_MEMFRE_FORMAT, 543 PTOB(vmstats.v_page_count))); 544 kcollect_register(KCOLLECT_MEMCAC, "cache", NULL, 545 KCOLLECT_SCALE(KCOLLECT_MEMCAC_FORMAT, 546 PTOB(vmstats.v_page_count))); 547 kcollect_register(KCOLLECT_MEMINA, "inact", NULL, 548 KCOLLECT_SCALE(KCOLLECT_MEMINA_FORMAT, 549 PTOB(vmstats.v_page_count))); 550 kcollect_register(KCOLLECT_MEMACT, "act", NULL, 551 KCOLLECT_SCALE(KCOLLECT_MEMACT_FORMAT, 552 PTOB(vmstats.v_page_count))); 553 kcollect_register(KCOLLECT_MEMWIR, "wired", NULL, 554 KCOLLECT_SCALE(KCOLLECT_MEMWIR_FORMAT, 555 PTOB(vmstats.v_page_count))); 556 557 kcollect_register(KCOLLECT_SYSCALLS, "syscalls", NULL, 558 KCOLLECT_SCALE(KCOLLECT_SYSCALLS_FORMAT, 0)); 559 560 kcollect_register(KCOLLECT_INTR, "intr", NULL, 561 KCOLLECT_SCALE(KCOLLECT_INTR_FORMAT, 0)); 562 kcollect_register(KCOLLECT_IPI, "ipi", NULL, 563 KCOLLECT_SCALE(KCOLLECT_IPI_FORMAT, 0)); 564 kcollect_register(KCOLLECT_TIMER, "timer", NULL, 565 KCOLLECT_SCALE(KCOLLECT_TIMER_FORMAT, 0)); 566 } 567 SYSINIT(vmmeter, SI_SUB_PSEUDO, SI_ORDER_ANY, vmmeter_init, 0); 568 569 /* 570 * Rolls up accumulated pcpu adjustments to vmstats counts into the global 571 * structure, copy the global structure into our pcpu structure. Critical 572 * path checks will use our pcpu structure. 573 * 574 * This is somewhat expensive and only called when needed, and by the 575 * hardclock. 576 */ 577 void 578 vmstats_rollup(void) 579 { 580 int cpu; 581 582 for (cpu = 0; cpu < ncpus; ++cpu) { 583 vmstats_rollup_cpu(globaldata_find(cpu)); 584 } 585 mycpu->gd_vmstats = vmstats; 586 } 587 588 void 589 vmstats_rollup_cpu(globaldata_t gd) 590 { 591 long value; 592 593 if (gd->gd_vmstats_adj.v_free_count) { 594 value = atomic_swap_long(&gd->gd_vmstats_adj.v_free_count, 0); 595 atomic_add_long(&vmstats.v_free_count, value); 596 } 597 if (gd->gd_vmstats_adj.v_cache_count) { 598 value = atomic_swap_long(&gd->gd_vmstats_adj.v_cache_count, 0); 599 atomic_add_long(&vmstats.v_cache_count, value); 600 } 601 if (gd->gd_vmstats_adj.v_inactive_count) { 602 value=atomic_swap_long(&gd->gd_vmstats_adj.v_inactive_count, 0); 603 atomic_add_long(&vmstats.v_inactive_count, value); 604 } 605 if (gd->gd_vmstats_adj.v_active_count) { 606 value = atomic_swap_long(&gd->gd_vmstats_adj.v_active_count, 0); 607 atomic_add_long(&vmstats.v_active_count, value); 608 } 609 if (gd->gd_vmstats_adj.v_wire_count) { 610 value = atomic_swap_long(&gd->gd_vmstats_adj.v_wire_count, 0); 611 atomic_add_long(&vmstats.v_wire_count, value); 612 } 613 } 614