1 /* $NetBSD: uvm_meter.c,v 1.81 2026/03/22 11:25:12 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Charles D. Cranor and Washington University. 5 * Copyright (c) 1982, 1986, 1989, 1993 6 * The Regents of the University of California. 7 * 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 35 * from: Id: uvm_meter.c,v 1.1.2.1 1997/08/14 19:10:35 chuck Exp 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: uvm_meter.c,v 1.81 2026/03/22 11:25:12 yamt Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/cpu.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/sysctl.h> 47 48 #include <uvm/uvm.h> 49 #include <uvm/uvm_pdpolicy.h> 50 51 /* 52 * maxslp: ???? XXXCDC 53 */ 54 55 int maxslp = MAXSLP; /* patchable ... */ 56 struct loadavg averunnable; 57 58 static void uvm_total(struct vmtotal *); 59 60 /* 61 * sysctl helper routine for the vm.vmmeter node. 62 */ 63 static int 64 sysctl_vm_meter(SYSCTLFN_ARGS) 65 { 66 struct sysctlnode node; 67 struct vmtotal vmtotals; 68 69 node = *rnode; 70 node.sysctl_data = &vmtotals; 71 uvm_total(&vmtotals); 72 73 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 74 } 75 76 /* 77 * sysctl helper routine for the vm.uvmexp node. 78 */ 79 static int 80 sysctl_vm_uvmexp(SYSCTLFN_ARGS) 81 { 82 struct sysctlnode node; 83 84 uvm_update_uvmexp(); 85 86 node = *rnode; 87 if (oldlenp) 88 node.sysctl_size = uimin(*oldlenp, node.sysctl_size); 89 90 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 91 } 92 93 static int 94 sysctl_vm_uvmexp2(SYSCTLFN_ARGS) 95 { 96 struct sysctlnode node; 97 struct uvmexp_sysctl u; 98 int active, inactive; 99 100 uvm_estimatepageable(&active, &inactive); 101 102 memset(&u, 0, sizeof(u)); 103 104 /* uvm_availmem() will sync the counters if old. */ 105 u.free = uvm_availmem(true); 106 u.pagesize = uvmexp.pagesize; 107 u.pagemask = uvmexp.pagemask; 108 u.pageshift = uvmexp.pageshift; 109 u.npages = uvmexp.npages; 110 u.active = active; 111 u.inactive = inactive; 112 u.paging = uvmexp.paging; 113 u.wired = uvmexp.wired; 114 u.reserve_pagedaemon = uvmexp.reserve_pagedaemon; 115 u.reserve_kernel = uvmexp.reserve_kernel; 116 u.freemin = uvmexp.freemin; 117 u.freetarg = uvmexp.freetarg; 118 u.inactarg = 0; /* unused */ 119 u.wiredmax = uvmexp.wiredmax; 120 u.nswapdev = uvmexp.nswapdev; 121 u.swpages = uvmexp.swpages; 122 u.swpginuse = uvmexp.swpginuse; 123 u.swpgonly = uvmexp.swpgonly; 124 u.nswget = uvmexp.nswget; 125 u.cpuhit = cpu_count_get(CPU_COUNT_CPUHIT); 126 u.cpumiss = cpu_count_get(CPU_COUNT_CPUMISS); 127 u.faults = cpu_count_get(CPU_COUNT_NFAULT); 128 u.traps = cpu_count_get(CPU_COUNT_NTRAP); 129 u.intrs = cpu_count_get(CPU_COUNT_NINTR); 130 u.swtch = cpu_count_get(CPU_COUNT_NSWTCH); 131 u.softs = cpu_count_get(CPU_COUNT_NSOFT); 132 u.syscalls = cpu_count_get(CPU_COUNT_NSYSCALL); 133 u.pageins = cpu_count_get(CPU_COUNT_PAGEINS); 134 u.pgswapin = 0; /* unused */ 135 u.pgswapout = uvmexp.pgswapout; 136 u.forks = cpu_count_get(CPU_COUNT_FORKS); 137 u.forks_ppwait = cpu_count_get(CPU_COUNT_FORKS_PPWAIT); 138 u.forks_sharevm = cpu_count_get(CPU_COUNT_FORKS_SHAREVM); 139 u.zeroaborts = uvmexp.zeroaborts; 140 u.fltnoram = cpu_count_get(CPU_COUNT_FLTNORAM); 141 u.fltnoanon = cpu_count_get(CPU_COUNT_FLTNOANON); 142 u.fltpgwait = cpu_count_get(CPU_COUNT_FLTPGWAIT); 143 u.fltpgrele = cpu_count_get(CPU_COUNT_FLTPGRELE); 144 u.fltrelck = cpu_count_get(CPU_COUNT_FLTRELCK); 145 u.fltrelckok = cpu_count_get(CPU_COUNT_FLTRELCKOK); 146 u.fltanget = cpu_count_get(CPU_COUNT_FLTANGET); 147 u.fltanretry = cpu_count_get(CPU_COUNT_FLTANRETRY); 148 u.fltamcopy = cpu_count_get(CPU_COUNT_FLTAMCOPY); 149 u.fltnamap = cpu_count_get(CPU_COUNT_FLTNAMAP); 150 u.fltnomap = cpu_count_get(CPU_COUNT_FLTNOMAP); 151 u.fltlget = cpu_count_get(CPU_COUNT_FLTLGET); 152 u.fltget = cpu_count_get(CPU_COUNT_FLTGET); 153 u.flt_anon = cpu_count_get(CPU_COUNT_FLT_ANON); 154 u.flt_acow = cpu_count_get(CPU_COUNT_FLT_ACOW); 155 u.flt_obj = cpu_count_get(CPU_COUNT_FLT_OBJ); 156 u.flt_prcopy = cpu_count_get(CPU_COUNT_FLT_PRCOPY); 157 u.flt_przero = cpu_count_get(CPU_COUNT_FLT_PRZERO); 158 u.pdwoke = uvmexp.pdwoke; 159 u.pdrevs = uvmexp.pdrevs; 160 u.pdfreed = uvmexp.pdfreed; 161 u.pdscans = uvmexp.pdscans; 162 u.pdanscan = uvmexp.pdanscan; 163 u.pdobscan = uvmexp.pdobscan; 164 u.pdreact = uvmexp.pdreact; 165 u.pdbusy = uvmexp.pdbusy; 166 u.pdpageouts = uvmexp.pdpageouts; 167 u.pddeact = uvmexp.pddeact; 168 u.execpages = cpu_count_get(CPU_COUNT_EXECPAGES); 169 u.colorhit = cpu_count_get(CPU_COUNT_COLORHIT); 170 u.colormiss = cpu_count_get(CPU_COUNT_COLORMISS); 171 u.ncolors = uvmexp.ncolors; 172 u.bootpages = uvmexp.bootpages; 173 u.poolpages = pool_totalpages(); 174 u.countsyncall = cpu_count_get(CPU_COUNT_SYNC); 175 u.anonunknown = cpu_count_get(CPU_COUNT_ANONUNKNOWN); 176 u.anonclean = cpu_count_get(CPU_COUNT_ANONCLEAN); 177 u.anondirty = cpu_count_get(CPU_COUNT_ANONDIRTY); 178 u.fileunknown = cpu_count_get(CPU_COUNT_FILEUNKNOWN); 179 u.fileclean = cpu_count_get(CPU_COUNT_FILECLEAN); 180 u.filedirty = cpu_count_get(CPU_COUNT_FILEDIRTY); 181 u.fltup = cpu_count_get(CPU_COUNT_FLTUP); 182 u.fltnoup = cpu_count_get(CPU_COUNT_FLTNOUP); 183 u.anonpages = u.anonclean + u.anondirty + u.anonunknown; 184 u.filepages = u.fileclean + u.filedirty + u.fileunknown - u.execpages; 185 186 node = *rnode; 187 node.sysctl_data = &u; 188 node.sysctl_size = sizeof(u); 189 if (oldlenp) 190 node.sysctl_size = uimin(*oldlenp, node.sysctl_size); 191 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 192 } 193 194 /* 195 * sysctl helper routine for uvm_pctparam. 196 */ 197 static int 198 uvm_sysctlpctparam(SYSCTLFN_ARGS) 199 { 200 int t, error; 201 struct sysctlnode node; 202 struct uvm_pctparam *pct; 203 204 pct = rnode->sysctl_data; 205 t = pct->pct_pct; 206 207 node = *rnode; 208 node.sysctl_data = &t; 209 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 210 if (error || newp == NULL) 211 return error; 212 213 if (t < 0 || t > 100) 214 return EINVAL; 215 216 error = uvm_pctparam_check(pct, t); 217 if (error) { 218 return error; 219 } 220 uvm_pctparam_set(pct, t); 221 222 return (0); 223 } 224 225 /* 226 * uvm_sysctl: sysctl hook into UVM system. 227 */ 228 SYSCTL_SETUP(sysctl_vm_setup, "sysctl vm subtree setup") 229 { 230 231 sysctl_createv(clog, 0, NULL, NULL, 232 CTLFLAG_PERMANENT, 233 CTLTYPE_STRUCT, "vmmeter", 234 SYSCTL_DESCR("Simple system-wide virtual memory " 235 "statistics"), 236 sysctl_vm_meter, 0, NULL, sizeof(struct vmtotal), 237 CTL_VM, VM_METER, CTL_EOL); 238 sysctl_createv(clog, 0, NULL, NULL, 239 CTLFLAG_PERMANENT, 240 CTLTYPE_STRUCT, "loadavg", 241 SYSCTL_DESCR("System load average history"), 242 NULL, 0, &averunnable, sizeof(averunnable), 243 CTL_VM, VM_LOADAVG, CTL_EOL); 244 sysctl_createv(clog, 0, NULL, NULL, 245 CTLFLAG_PERMANENT, 246 CTLTYPE_STRUCT, "uvmexp", 247 SYSCTL_DESCR("Detailed system-wide virtual memory " 248 "statistics"), 249 sysctl_vm_uvmexp, 0, &uvmexp, sizeof(uvmexp), 250 CTL_VM, VM_UVMEXP, CTL_EOL); 251 sysctl_createv(clog, 0, NULL, NULL, 252 CTLFLAG_PERMANENT, 253 CTLTYPE_STRUCT, "uvmexp2", 254 SYSCTL_DESCR("Detailed system-wide virtual memory " 255 "statistics (MI)"), 256 sysctl_vm_uvmexp2, 0, NULL, 0, 257 CTL_VM, VM_UVMEXP2, CTL_EOL); 258 sysctl_createv(clog, 0, NULL, NULL, 259 CTLFLAG_PERMANENT, CTLTYPE_INT, "maxslp", 260 SYSCTL_DESCR("Maximum process sleep time before being " 261 "swapped"), 262 NULL, 0, &maxslp, 0, 263 CTL_VM, VM_MAXSLP, CTL_EOL); 264 sysctl_createv(clog, 0, NULL, NULL, 265 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 266 CTLTYPE_INT, "uspace", 267 SYSCTL_DESCR("Number of bytes allocated for a kernel " 268 "stack"), 269 NULL, USPACE, NULL, 0, 270 CTL_VM, VM_USPACE, CTL_EOL); 271 sysctl_createv(clog, 0, NULL, NULL, 272 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 273 CTLTYPE_LONG, "minaddress", 274 SYSCTL_DESCR("Minimum user address"), 275 NULL, VM_MIN_ADDRESS, NULL, 0, 276 CTL_VM, VM_MINADDRESS, CTL_EOL); 277 sysctl_createv(clog, 0, NULL, NULL, 278 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 279 CTLTYPE_LONG, "maxaddress", 280 SYSCTL_DESCR("Maximum user address"), 281 NULL, VM_MAX_ADDRESS, NULL, 0, 282 CTL_VM, VM_MAXADDRESS, CTL_EOL); 283 sysctl_createv(clog, 0, NULL, NULL, 284 CTLFLAG_PERMANENT|CTLFLAG_UNSIGNED, 285 CTLTYPE_INT, "guard_size", 286 SYSCTL_DESCR("Guard size of main thread"), 287 NULL, 0, &user_stack_guard_size, 0, 288 CTL_VM, VM_GUARD_SIZE, CTL_EOL); 289 sysctl_createv(clog, 0, NULL, NULL, 290 CTLFLAG_PERMANENT|CTLFLAG_UNSIGNED|CTLFLAG_READWRITE, 291 CTLTYPE_INT, "thread_guard_size", 292 SYSCTL_DESCR("Guard size of other threads"), 293 NULL, 0, &user_thread_stack_guard_size, 0, 294 CTL_VM, VM_THREAD_GUARD_SIZE, CTL_EOL); 295 #ifdef PMAP_DIRECT 296 sysctl_createv(clog, 0, NULL, NULL, 297 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 298 CTLTYPE_BOOL, "ubc_direct", 299 SYSCTL_DESCR("Use direct map for UBC I/O"), 300 NULL, 0, &ubc_direct, 0, 301 CTL_VM, CTL_CREATE, CTL_EOL); 302 #endif 303 304 uvmpdpol_sysctlsetup(); 305 } 306 307 /* 308 * uvm_total: calculate the current state of the system. 309 */ 310 static void 311 uvm_total(struct vmtotal *totalp) 312 { 313 struct lwp *l; 314 #if 0 315 struct vm_map_entry * entry; 316 struct vm_map *map; 317 int paging; 318 #endif 319 int freepg; 320 int active; 321 322 memset(totalp, 0, sizeof *totalp); 323 324 /* 325 * calculate process statistics 326 */ 327 mutex_enter(&proc_lock); 328 LIST_FOREACH(l, &alllwp, l_list) { 329 if (l->l_proc->p_flag & PK_SYSTEM) 330 continue; 331 switch (l->l_stat) { 332 case 0: 333 continue; 334 335 case LSSLEEP: 336 case LSSTOP: 337 if ((l->l_flag & LW_SINTR) == 0) { 338 totalp->t_dw++; 339 } else if (l->l_slptime < maxslp) { 340 totalp->t_sl++; 341 } 342 if (l->l_slptime >= maxslp) 343 continue; 344 break; 345 346 case LSRUN: 347 case LSONPROC: 348 case LSIDL: 349 totalp->t_rq++; 350 if (l->l_stat == LSIDL) 351 continue; 352 break; 353 } 354 /* 355 * note active objects 356 */ 357 #if 0 358 /* 359 * XXXCDC: BOGUS! rethink this. in the mean time 360 * don't do it. 361 */ 362 paging = 0; 363 vm_map_lock(map); 364 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 365 entry != &map->header; entry = entry->next) { 366 if (entry->is_a_map || entry->is_sub_map || 367 entry->object.uvm_obj == NULL) 368 continue; 369 /* XXX how to do this with uvm */ 370 } 371 vm_map_unlock(map); 372 if (paging) 373 totalp->t_pw++; 374 #endif 375 } 376 mutex_exit(&proc_lock); 377 378 /* 379 * Calculate object memory usage statistics. 380 */ 381 freepg = uvm_availmem(true); 382 uvm_estimatepageable(&active, NULL); 383 totalp->t_free = freepg; 384 totalp->t_vm = uvmexp.npages - freepg + uvmexp.swpginuse; 385 totalp->t_avm = active + uvmexp.swpginuse; /* XXX */ 386 totalp->t_rm = uvmexp.npages - freepg; 387 totalp->t_arm = active; 388 totalp->t_vmshr = 0; /* XXX */ 389 totalp->t_avmshr = 0; /* XXX */ 390 totalp->t_rmshr = 0; /* XXX */ 391 totalp->t_armshr = 0; /* XXX */ 392 } 393 394 void 395 uvm_pctparam_set(struct uvm_pctparam *pct, int val) 396 { 397 398 pct->pct_pct = val; 399 pct->pct_scaled = val * UVM_PCTPARAM_SCALE / 100; 400 } 401 402 int 403 uvm_pctparam_get(struct uvm_pctparam *pct) 404 { 405 406 return pct->pct_pct; 407 } 408 409 int 410 uvm_pctparam_check(struct uvm_pctparam *pct, int val) 411 { 412 413 if (pct->pct_check == NULL) { 414 return 0; 415 } 416 return (*pct->pct_check)(pct, val); 417 } 418 419 void 420 uvm_pctparam_init(struct uvm_pctparam *pct, int val, 421 int (*fn)(struct uvm_pctparam *, int)) 422 { 423 424 pct->pct_check = fn; 425 uvm_pctparam_set(pct, val); 426 } 427 428 int 429 uvm_pctparam_createsysctlnode(struct uvm_pctparam *pct, const char *name, 430 const char *desc) 431 { 432 433 return sysctl_createv(NULL, 0, NULL, NULL, 434 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 435 CTLTYPE_INT, name, SYSCTL_DESCR(desc), 436 uvm_sysctlpctparam, 0, (void *)pct, 0, CTL_VM, CTL_CREATE, CTL_EOL); 437 } 438 439 /* 440 * Update uvmexp with aggregate values from the per-CPU counters. 441 */ 442 void 443 uvm_update_uvmexp(void) 444 { 445 446 /* uvm_availmem() will sync the counters if old. */ 447 uvmexp.free = (int)uvm_availmem(true); 448 uvmexp.cpuhit = (int)cpu_count_get(CPU_COUNT_CPUHIT); 449 uvmexp.cpumiss = (int)cpu_count_get(CPU_COUNT_CPUMISS); 450 uvmexp.faults = (int)cpu_count_get(CPU_COUNT_NFAULT); 451 uvmexp.traps = (int)cpu_count_get(CPU_COUNT_NTRAP); 452 uvmexp.intrs = (int)cpu_count_get(CPU_COUNT_NINTR); 453 uvmexp.swtch = (int)cpu_count_get(CPU_COUNT_NSWTCH); 454 uvmexp.softs = (int)cpu_count_get(CPU_COUNT_NSOFT); 455 uvmexp.syscalls = (int)cpu_count_get(CPU_COUNT_NSYSCALL); 456 uvmexp.pageins = (int)cpu_count_get(CPU_COUNT_PAGEINS); 457 uvmexp.forks = (int)cpu_count_get(CPU_COUNT_FORKS); 458 uvmexp.forks_ppwait = (int)cpu_count_get(CPU_COUNT_FORKS_PPWAIT); 459 uvmexp.forks_sharevm = (int)cpu_count_get(CPU_COUNT_FORKS_SHAREVM); 460 uvmexp.fltnoram = (int)cpu_count_get(CPU_COUNT_FLTNORAM); 461 uvmexp.fltnoanon = (int)cpu_count_get(CPU_COUNT_FLTNOANON); 462 uvmexp.fltpgwait = (int)cpu_count_get(CPU_COUNT_FLTPGWAIT); 463 uvmexp.fltpgrele = (int)cpu_count_get(CPU_COUNT_FLTPGRELE); 464 uvmexp.fltrelck = (int)cpu_count_get(CPU_COUNT_FLTRELCK); 465 uvmexp.fltrelckok = (int)cpu_count_get(CPU_COUNT_FLTRELCKOK); 466 uvmexp.fltanget = (int)cpu_count_get(CPU_COUNT_FLTANGET); 467 uvmexp.fltanretry = (int)cpu_count_get(CPU_COUNT_FLTANRETRY); 468 uvmexp.fltamcopy = (int)cpu_count_get(CPU_COUNT_FLTAMCOPY); 469 uvmexp.fltnamap = (int)cpu_count_get(CPU_COUNT_FLTNAMAP); 470 uvmexp.fltnomap = (int)cpu_count_get(CPU_COUNT_FLTNOMAP); 471 uvmexp.fltlget = (int)cpu_count_get(CPU_COUNT_FLTLGET); 472 uvmexp.fltget = (int)cpu_count_get(CPU_COUNT_FLTGET); 473 uvmexp.flt_anon = (int)cpu_count_get(CPU_COUNT_FLT_ANON); 474 uvmexp.flt_acow = (int)cpu_count_get(CPU_COUNT_FLT_ACOW); 475 uvmexp.flt_obj = (int)cpu_count_get(CPU_COUNT_FLT_OBJ); 476 uvmexp.flt_prcopy = (int)cpu_count_get(CPU_COUNT_FLT_PRCOPY); 477 uvmexp.flt_przero = (int)cpu_count_get(CPU_COUNT_FLT_PRZERO); 478 uvmexp.anonpages = (int)(cpu_count_get(CPU_COUNT_ANONCLEAN) + 479 cpu_count_get(CPU_COUNT_ANONDIRTY) + 480 cpu_count_get(CPU_COUNT_ANONUNKNOWN)); 481 uvmexp.filepages = (int)(cpu_count_get(CPU_COUNT_FILECLEAN) + 482 cpu_count_get(CPU_COUNT_FILEDIRTY) + 483 cpu_count_get(CPU_COUNT_FILEUNKNOWN) - 484 cpu_count_get(CPU_COUNT_EXECPAGES)); 485 uvmexp.execpages = (int)cpu_count_get(CPU_COUNT_EXECPAGES); 486 uvmexp.colorhit = (int)cpu_count_get(CPU_COUNT_COLORHIT); 487 uvmexp.colormiss = (int)cpu_count_get(CPU_COUNT_COLORMISS); 488 } 489
Indexes created Sun Oct 25 00:26:45 UTC 2026