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 * $DragonFly: src/sys/vm/vm_meter.c,v 1.15 2008/04/28 18:04:08 dillon Exp $ 34 */ 35 36 #include <sys/param.h> 37 #include <sys/proc.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.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 * accumulative 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 __cachealign 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 ((p->p_flags & P_SWAPPEDOUT) == 0) { 164 if ((lp->lwp_flags & LWP_SINTR) == 0) 165 totalp->t_dw++; 166 else if (lp->lwp_slptime < maxslp) 167 totalp->t_sl++; 168 } else if (lp->lwp_slptime < maxslp) { 169 totalp->t_sw++; 170 } 171 if (lp->lwp_slptime >= maxslp) 172 goto out; 173 break; 174 175 case LSRUN: 176 if (p->p_flags & P_SWAPPEDOUT) 177 totalp->t_sw++; 178 else 179 totalp->t_rq++; 180 if (p->p_stat == SIDL) 181 goto out; 182 break; 183 184 default: 185 goto out; 186 } 187 188 /* 189 * Set while in vm_fault() 190 */ 191 if (lp->lwp_flags & LWP_PAGING) 192 totalp->t_pw++; 193 } 194 out: 195 lwkt_reltoken(&p->p_token); 196 return(0); 197 } 198 199 /* 200 * No requirements. 201 */ 202 static int 203 do_vmstats(SYSCTL_HANDLER_ARGS) 204 { 205 struct vmstats vms = vmstats; 206 return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req)); 207 } 208 209 /* 210 * No requirements. 211 */ 212 static int 213 do_vmmeter(SYSCTL_HANDLER_ARGS) 214 { 215 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin); 216 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end); 217 struct vmmeter vmm; 218 int i; 219 220 bzero(&vmm, sizeof(vmm)); 221 for (i = 0; i < ncpus; ++i) { 222 int off; 223 struct globaldata *gd = globaldata_find(i); 224 225 for (off = boffset; off <= eoffset; off += sizeof(u_int)) { 226 *(u_int *)((char *)&vmm + off) += 227 *(u_int *)((char *)&gd->gd_cnt + off); 228 } 229 230 } 231 vmm.v_intr += vmm.v_ipi + vmm.v_timer; 232 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req)); 233 } 234 235 /* 236 * vcnt() - accumulate statistics from the cnt structure for each cpu 237 * 238 * The vmmeter structure is now per-cpu as well as global. Those 239 * statistics which can be kept on a per-cpu basis (to avoid cache 240 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 241 * statistics, such as v_free_reserved, are left in the global 242 * structure. 243 * 244 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 245 * 246 * No requirements. 247 */ 248 static int 249 vcnt(SYSCTL_HANDLER_ARGS) 250 { 251 int i; 252 int count = 0; 253 int offset = arg2; 254 255 for (i = 0; i < ncpus; ++i) { 256 struct globaldata *gd = globaldata_find(i); 257 count += *(int *)((char *)&gd->gd_cnt + offset); 258 } 259 return(SYSCTL_OUT(req, &count, sizeof(int))); 260 } 261 262 /* 263 * No requirements. 264 */ 265 static int 266 vcnt_intr(SYSCTL_HANDLER_ARGS) 267 { 268 int i; 269 int count = 0; 270 271 for (i = 0; i < ncpus; ++i) { 272 struct globaldata *gd = globaldata_find(i); 273 274 count += gd->gd_cnt.v_intr + gd->gd_cnt.v_ipi + 275 gd->gd_cnt.v_timer; 276 } 277 return(SYSCTL_OUT(req, &count, sizeof(int))); 278 } 279 280 #define VMMETEROFF(var) offsetof(struct vmmeter, var) 281 282 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD, 283 0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal", 284 "System virtual memory aggregate"); 285 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD, 286 0, sizeof(struct vmstats), do_vmstats, "S,vmstats", 287 "System virtual memory statistics"); 288 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 289 0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter", 290 "System statistics"); 291 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 292 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); 293 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); 294 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 295 296 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD, 297 0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches"); 298 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD, 299 0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "Intransit map collisions (total)"); 300 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD, 301 0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "Intransit map collisions which blocked"); 302 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD, 303 0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "Forwarded interrupts due to MP lock"); 304 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD, 305 0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "Forwarded hits due to MP lock"); 306 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD, 307 0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "Forwarded misses due to MP lock"); 308 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD, 309 0, VMMETEROFF(v_trap), vcnt, "IU", "Traps"); 310 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD, 311 0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls"); 312 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD, 313 0, VMMETEROFF(v_intr), vcnt_intr, "IU", "Hardware interrupts"); 314 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_ipi, CTLTYPE_UINT|CTLFLAG_RD, 315 0, VMMETEROFF(v_ipi), vcnt, "IU", "Inter-processor interrupts"); 316 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_timer, CTLTYPE_UINT|CTLFLAG_RD, 317 0, VMMETEROFF(v_timer), vcnt, "IU", "LAPIC timer interrupts"); 318 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD, 319 0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts"); 320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD, 321 0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults"); 322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD, 323 0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults"); 324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD, 325 0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults"); 326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD, 327 0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill"); 328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD, 329 0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill"); 330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD, 331 0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations"); 332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD, 333 0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations"); 334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD, 335 0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages"); 336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD, 337 0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages"); 338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD, 339 0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations"); 340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD, 341 0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations"); 342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD, 343 0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages"); 344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD, 345 0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages"); 346 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD, 347 0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking"); 348 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD, 349 0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages"); 350 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD, 351 0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups"); 352 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ppwakeups, CTLTYPE_UINT|CTLFLAG_RD, 353 0, VMMETEROFF(v_ppwakeups), vcnt, "IU", "vm_wait wakeups"); 354 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD, 355 0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans"); 356 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD, 357 0, VMMETEROFF(v_dfree), vcnt, "IU", "Pages freed by daemon"); 358 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD, 359 0, VMMETEROFF(v_pfree), vcnt, "IU", "Pages freed by exiting processes"); 360 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD, 361 0, VMMETEROFF(v_tfree), vcnt, "IU", "Total pages freed"); 362 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD, 363 0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls"); 364 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD, 365 0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls"); 366 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD, 367 0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls"); 368 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD, 369 0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel"); 370 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD, 371 0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()"); 372 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD, 373 0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()"); 374 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD, 375 0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()"); 376 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD, 377 0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel"); 378 379 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, 380 v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0, 381 "Page size in bytes"); 382 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 383 v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, 384 "Total number of pages in system"); 385 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 386 v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0, 387 "Number of pages reserved for deadlock"); 388 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 389 v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0, 390 "Number of pages desired free"); 391 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 392 v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0, 393 "Minimum number of pages desired free"); 394 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 395 v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0, 396 "Number of pages free"); 397 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 398 v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0, 399 "Number of pages wired down"); 400 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 401 v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0, 402 "Number of pages active"); 403 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 404 v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0, 405 "Number of pages desired inactive"); 406 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 407 v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0, 408 "Number of pages inactive"); 409 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 410 v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0, 411 "Number of pages on buffer cache queue"); 412 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 413 v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0, 414 "Min number of pages desired on cache queue"); 415 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 416 v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0, 417 "Max number of pages in cached obj"); 418 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 419 v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0, 420 "Min number pages reserved for kernel"); 421 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, 422 v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0, 423 "Reserved number of pages for int code"); 424 425 /* 426 * No requirements. 427 */ 428 static int 429 do_vmmeter_pcpu(SYSCTL_HANDLER_ARGS) 430 { 431 int boffset = offsetof(struct vmmeter, vmmeter_uint_begin); 432 int eoffset = offsetof(struct vmmeter, vmmeter_uint_end); 433 struct globaldata *gd = arg1; 434 struct vmmeter vmm; 435 int off; 436 437 bzero(&vmm, sizeof(vmm)); 438 for (off = boffset; off <= eoffset; off += sizeof(u_int)) { 439 *(u_int *)((char *)&vmm + off) += 440 *(u_int *)((char *)&gd->gd_cnt + off); 441 } 442 vmm.v_intr += vmm.v_ipi + vmm.v_timer; 443 return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req)); 444 } 445 446 /* 447 * Callback for long-term slow data collection on 10-second interval. 448 * 449 * Return faults, set data for other entries. 450 */ 451 #define PTOB(value) ((uint64_t)(value) << PAGE_SHIFT) 452 453 static uint64_t 454 collect_vmstats_callback(int n) 455 { 456 static struct vmmeter last_vmm; 457 struct vmmeter cur_vmm; 458 const int boffset = offsetof(struct vmmeter, vmmeter_uint_begin); 459 const int eoffset = offsetof(struct vmmeter, vmmeter_uint_end); 460 uint64_t total; 461 462 /* 463 * The hardclock already rolls up vmstats for us. 464 */ 465 kcollect_setvalue(KCOLLECT_MEMFRE, PTOB(vmstats.v_free_count)); 466 kcollect_setvalue(KCOLLECT_MEMCAC, PTOB(vmstats.v_cache_count)); 467 kcollect_setvalue(KCOLLECT_MEMINA, PTOB(vmstats.v_inactive_count)); 468 kcollect_setvalue(KCOLLECT_MEMACT, PTOB(vmstats.v_active_count)); 469 kcollect_setvalue(KCOLLECT_MEMWIR, PTOB(vmstats.v_wire_count)); 470 471 /* 472 * Collect pcpu statistics for things like faults. 473 */ 474 bzero(&cur_vmm, sizeof(cur_vmm)); 475 for (n = 0; n < ncpus; ++n) { 476 struct globaldata *gd = globaldata_find(n); 477 int off; 478 479 for (off = boffset; off <= eoffset; off += sizeof(u_int)) { 480 *(u_int *)((char *)&cur_vmm + off) += 481 *(u_int *)((char *)&gd->gd_cnt + off); 482 } 483 484 } 485 486 total = cur_vmm.v_cow_faults - last_vmm.v_cow_faults; 487 last_vmm.v_cow_faults = cur_vmm.v_cow_faults; 488 kcollect_setvalue(KCOLLECT_COWFAULT, total); 489 490 total = cur_vmm.v_zfod - last_vmm.v_zfod; 491 last_vmm.v_zfod = cur_vmm.v_zfod; 492 kcollect_setvalue(KCOLLECT_ZFILL, total); 493 494 total = cur_vmm.v_syscall - last_vmm.v_syscall; 495 last_vmm.v_syscall = cur_vmm.v_syscall; 496 kcollect_setvalue(KCOLLECT_SYSCALLS, total); 497 498 total = cur_vmm.v_intr - last_vmm.v_intr; 499 last_vmm.v_intr = cur_vmm.v_intr; 500 kcollect_setvalue(KCOLLECT_INTR, total); 501 502 total = cur_vmm.v_ipi - last_vmm.v_ipi; 503 last_vmm.v_ipi = cur_vmm.v_ipi; 504 kcollect_setvalue(KCOLLECT_IPI, total); 505 506 total = cur_vmm.v_timer - last_vmm.v_timer; 507 last_vmm.v_timer = cur_vmm.v_timer; 508 kcollect_setvalue(KCOLLECT_TIMER, total); 509 510 total = cur_vmm.v_vm_faults - last_vmm.v_vm_faults; 511 last_vmm.v_vm_faults = cur_vmm.v_vm_faults; 512 513 return total; 514 } 515 516 /* 517 * Called from the low level boot code only. 518 */ 519 static void 520 vmmeter_init(void *dummy __unused) 521 { 522 int i; 523 524 for (i = 0; i < ncpus; ++i) { 525 struct sysctl_ctx_list *ctx; 526 struct sysctl_oid *oid; 527 struct globaldata *gd; 528 char name[32]; 529 530 ksnprintf(name, sizeof(name), "cpu%d", i); 531 532 ctx = kmalloc(sizeof(*ctx), M_TEMP, M_WAITOK); 533 sysctl_ctx_init(ctx); 534 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_vm), 535 OID_AUTO, name, CTLFLAG_RD, 0, ""); 536 537 gd = globaldata_find(i); 538 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 539 "vmmeter", CTLTYPE_OPAQUE|CTLFLAG_RD, 540 gd, sizeof(struct vmmeter), do_vmmeter_pcpu, 541 "S,vmmeter", "System per-cpu statistics"); 542 } 543 kcollect_register(KCOLLECT_VMFAULT, "fault", collect_vmstats_callback, 544 KCOLLECT_SCALE(KCOLLECT_VMFAULT_FORMAT, 0)); 545 kcollect_register(KCOLLECT_COWFAULT, "cow", NULL, 546 KCOLLECT_SCALE(KCOLLECT_COWFAULT_FORMAT, 0)); 547 kcollect_register(KCOLLECT_ZFILL, "zfill", NULL, 548 KCOLLECT_SCALE(KCOLLECT_ZFILL_FORMAT, 0)); 549 550 kcollect_register(KCOLLECT_MEMFRE, "free", NULL, 551 KCOLLECT_SCALE(KCOLLECT_MEMFRE_FORMAT, 552 PTOB(vmstats.v_page_count))); 553 kcollect_register(KCOLLECT_MEMCAC, "cache", NULL, 554 KCOLLECT_SCALE(KCOLLECT_MEMCAC_FORMAT, 555 PTOB(vmstats.v_page_count))); 556 kcollect_register(KCOLLECT_MEMINA, "inact", NULL, 557 KCOLLECT_SCALE(KCOLLECT_MEMINA_FORMAT, 558 PTOB(vmstats.v_page_count))); 559 kcollect_register(KCOLLECT_MEMACT, "act", NULL, 560 KCOLLECT_SCALE(KCOLLECT_MEMACT_FORMAT, 561 PTOB(vmstats.v_page_count))); 562 kcollect_register(KCOLLECT_MEMWIR, "wired", NULL, 563 KCOLLECT_SCALE(KCOLLECT_MEMWIR_FORMAT, 564 PTOB(vmstats.v_page_count))); 565 566 kcollect_register(KCOLLECT_SYSCALLS, "syscalls", NULL, 567 KCOLLECT_SCALE(KCOLLECT_SYSCALLS_FORMAT, 0)); 568 569 kcollect_register(KCOLLECT_INTR, "intr", NULL, 570 KCOLLECT_SCALE(KCOLLECT_INTR_FORMAT, 0)); 571 kcollect_register(KCOLLECT_IPI, "ipi", NULL, 572 KCOLLECT_SCALE(KCOLLECT_IPI_FORMAT, 0)); 573 kcollect_register(KCOLLECT_TIMER, "timer", NULL, 574 KCOLLECT_SCALE(KCOLLECT_TIMER_FORMAT, 0)); 575 } 576 SYSINIT(vmmeter, SI_SUB_PSEUDO, SI_ORDER_ANY, vmmeter_init, 0); 577 578 /* 579 * Rolls up accumulated pcpu adjustments to vmstats counts into the global 580 * structure, copy the global structure into our pcpu structure. Critical 581 * path checks will use our pcpu structure. 582 * 583 * This is somewhat expensive and only called when needed, and by the 584 * hardclock. 585 */ 586 void 587 vmstats_rollup(void) 588 { 589 int cpu; 590 591 for (cpu = 0; cpu < ncpus; ++cpu) { 592 vmstats_rollup_cpu(globaldata_find(cpu)); 593 } 594 mycpu->gd_vmstats = vmstats; 595 } 596 597 void 598 vmstats_rollup_cpu(globaldata_t gd) 599 { 600 long value; 601 602 if (gd->gd_vmstats_adj.v_free_count) { 603 value = atomic_swap_long(&gd->gd_vmstats_adj.v_free_count, 0); 604 atomic_add_long(&vmstats.v_free_count, value); 605 } 606 if (gd->gd_vmstats_adj.v_cache_count) { 607 value = atomic_swap_long(&gd->gd_vmstats_adj.v_cache_count, 0); 608 atomic_add_long(&vmstats.v_cache_count, value); 609 } 610 if (gd->gd_vmstats_adj.v_inactive_count) { 611 value=atomic_swap_long(&gd->gd_vmstats_adj.v_inactive_count, 0); 612 atomic_add_long(&vmstats.v_inactive_count, value); 613 } 614 if (gd->gd_vmstats_adj.v_active_count) { 615 value = atomic_swap_long(&gd->gd_vmstats_adj.v_active_count, 0); 616 atomic_add_long(&vmstats.v_active_count, value); 617 } 618 if (gd->gd_vmstats_adj.v_wire_count) { 619 value = atomic_swap_long(&gd->gd_vmstats_adj.v_wire_count, 0); 620 atomic_add_long(&vmstats.v_wire_count, value); 621 } 622 } 623