1 /* $NetBSD: uvm_meter.c,v 1.39 2005/12/21 12:23:44 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Charles D. Cranor, 21 * Washington University, and the University of California, Berkeley 22 * and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 40 * from: Id: uvm_meter.c,v 1.1.2.1 1997/08/14 19:10:35 chuck Exp 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: uvm_meter.c,v 1.39 2005/12/21 12:23:44 yamt Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/proc.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <uvm/uvm_extern.h> 51 #include <sys/sysctl.h> 52 53 /* 54 * maxslp: ???? XXXCDC 55 */ 56 57 int maxslp = MAXSLP; /* patchable ... */ 58 struct loadavg averunnable; 59 60 /* 61 * constants for averages over 1, 5, and 15 minutes when sampling at 62 * 5 second intervals. 63 */ 64 65 static const fixpt_t cexp[3] = { 66 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 67 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 68 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 69 }; 70 71 /* 72 * prototypes 73 */ 74 75 static void uvm_loadav(struct loadavg *); 76 static void uvm_total(struct vmtotal *); 77 78 /* 79 * uvm_meter: calculate load average and wake up the swapper (if needed) 80 */ 81 void 82 uvm_meter(void) 83 { 84 if ((time.tv_sec % 5) == 0) 85 uvm_loadav(&averunnable); 86 if (lwp0.l_slptime > (maxslp / 2)) 87 wakeup(&proc0); 88 } 89 90 /* 91 * uvm_loadav: compute a tenex style load average of a quantity on 92 * 1, 5, and 15 minute internvals. 93 */ 94 static void 95 uvm_loadav(struct loadavg *avg) 96 { 97 int i, nrun; 98 struct lwp *l; 99 100 proclist_lock_read(); 101 nrun = 0; 102 LIST_FOREACH(l, &alllwp, l_list) { 103 switch (l->l_stat) { 104 case LSSLEEP: 105 if (l->l_priority > PZERO || l->l_slptime > 1) 106 continue; 107 /* fall through */ 108 case LSRUN: 109 case LSONPROC: 110 case LSIDL: 111 nrun++; 112 } 113 } 114 proclist_unlock_read(); 115 for (i = 0; i < 3; i++) 116 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 117 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 118 } 119 120 /* 121 * sysctl helper routine for the vm.vmmeter node. 122 */ 123 static int 124 sysctl_vm_meter(SYSCTLFN_ARGS) 125 { 126 struct sysctlnode node; 127 struct vmtotal vmtotals; 128 129 node = *rnode; 130 node.sysctl_data = &vmtotals; 131 uvm_total(&vmtotals); 132 133 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 134 } 135 136 /* 137 * sysctl helper routine for the vm.uvmexp node. 138 */ 139 static int 140 sysctl_vm_uvmexp(SYSCTLFN_ARGS) 141 { 142 struct sysctlnode node; 143 144 node = *rnode; 145 if (oldp) 146 node.sysctl_size = min(*oldlenp, node.sysctl_size); 147 148 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 149 } 150 151 static int 152 sysctl_vm_uvmexp2(SYSCTLFN_ARGS) 153 { 154 struct sysctlnode node; 155 struct uvmexp_sysctl u; 156 157 memset(&u, 0, sizeof(u)); 158 159 /* Entries here are in order of uvmexp_sysctl, not uvmexp */ 160 u.pagesize = uvmexp.pagesize; 161 u.pagemask = uvmexp.pagemask; 162 u.pageshift = uvmexp.pageshift; 163 u.npages = uvmexp.npages; 164 u.free = uvmexp.free; 165 u.active = uvmexp.active; 166 u.inactive = uvmexp.inactive; 167 u.paging = uvmexp.paging; 168 u.wired = uvmexp.wired; 169 u.zeropages = uvmexp.zeropages; 170 u.reserve_pagedaemon = uvmexp.reserve_pagedaemon; 171 u.reserve_kernel = uvmexp.reserve_kernel; 172 u.freemin = uvmexp.freemin; 173 u.freetarg = uvmexp.freetarg; 174 u.inactarg = uvmexp.inactarg; 175 u.wiredmax = uvmexp.wiredmax; 176 u.nswapdev = uvmexp.nswapdev; 177 u.swpages = uvmexp.swpages; 178 u.swpginuse = uvmexp.swpginuse; 179 u.swpgonly = uvmexp.swpgonly; 180 u.nswget = uvmexp.nswget; 181 u.faults = uvmexp.faults; 182 u.traps = uvmexp.traps; 183 u.intrs = uvmexp.intrs; 184 u.swtch = uvmexp.swtch; 185 u.softs = uvmexp.softs; 186 u.syscalls = uvmexp.syscalls; 187 u.pageins = uvmexp.pageins; 188 u.swapins = uvmexp.swapins; 189 u.swapouts = uvmexp.swapouts; 190 u.pgswapin = uvmexp.pgswapin; 191 u.pgswapout = uvmexp.pgswapout; 192 u.forks = uvmexp.forks; 193 u.forks_ppwait = uvmexp.forks_ppwait; 194 u.forks_sharevm = uvmexp.forks_sharevm; 195 u.pga_zerohit = uvmexp.pga_zerohit; 196 u.pga_zeromiss = uvmexp.pga_zeromiss; 197 u.zeroaborts = uvmexp.zeroaborts; 198 u.fltnoram = uvmexp.fltnoram; 199 u.fltnoanon = uvmexp.fltnoanon; 200 u.fltpgwait = uvmexp.fltpgwait; 201 u.fltpgrele = uvmexp.fltpgrele; 202 u.fltrelck = uvmexp.fltrelck; 203 u.fltrelckok = uvmexp.fltrelckok; 204 u.fltanget = uvmexp.fltanget; 205 u.fltanretry = uvmexp.fltanretry; 206 u.fltamcopy = uvmexp.fltamcopy; 207 u.fltnamap = uvmexp.fltnamap; 208 u.fltnomap = uvmexp.fltnomap; 209 u.fltlget = uvmexp.fltlget; 210 u.fltget = uvmexp.fltget; 211 u.flt_anon = uvmexp.flt_anon; 212 u.flt_acow = uvmexp.flt_acow; 213 u.flt_obj = uvmexp.flt_obj; 214 u.flt_prcopy = uvmexp.flt_prcopy; 215 u.flt_przero = uvmexp.flt_przero; 216 u.pdwoke = uvmexp.pdwoke; 217 u.pdrevs = uvmexp.pdrevs; 218 u.pdswout = uvmexp.pdswout; 219 u.pdfreed = uvmexp.pdfreed; 220 u.pdscans = uvmexp.pdscans; 221 u.pdanscan = uvmexp.pdanscan; 222 u.pdobscan = uvmexp.pdobscan; 223 u.pdreact = uvmexp.pdreact; 224 u.pdbusy = uvmexp.pdbusy; 225 u.pdpageouts = uvmexp.pdpageouts; 226 u.pdpending = uvmexp.pdpending; 227 u.pddeact = uvmexp.pddeact; 228 u.anonpages = uvmexp.anonpages; 229 u.filepages = uvmexp.filepages; 230 u.execpages = uvmexp.execpages; 231 u.colorhit = uvmexp.colorhit; 232 u.colormiss = uvmexp.colormiss; 233 234 node = *rnode; 235 node.sysctl_data = &u; 236 node.sysctl_size = sizeof(u); 237 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 238 } 239 240 /* 241 * sysctl helper routine for the vm.{anon,exec,file}{min,max} nodes. 242 * makes sure that they all correlate properly and none are set too 243 * large. 244 */ 245 static int 246 sysctl_vm_updateminmax(SYSCTLFN_ARGS) 247 { 248 int t, error; 249 struct sysctlnode node; 250 251 node = *rnode; 252 node.sysctl_data = &t; 253 t = *(int*)rnode->sysctl_data; 254 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 255 if (error || newp == NULL) 256 return (error); 257 258 if (t < 0 || t > 100) 259 return (EINVAL); 260 261 #define UPDATEMIN(a, ap, bp, cp, tp) do { \ 262 if (tp + uvmexp.bp + uvmexp.cp > 95) \ 263 return (EINVAL); \ 264 uvmexp.ap = tp; \ 265 uvmexp.a = uvmexp.ap * 256 / 100; \ 266 } while (0/*CONSTCOND*/) 267 268 #define UPDATEMAX(a, ap, tp) do { \ 269 uvmexp.ap = tp; \ 270 uvmexp.a = tp * 256 / 100; \ 271 } while (0/*CONSTCOND*/) 272 273 switch (rnode->sysctl_num) { 274 case VM_ANONMIN: 275 UPDATEMIN(anonmin, anonminpct, fileminpct, execminpct, t); 276 break; 277 case VM_EXECMIN: 278 UPDATEMIN(execmin, execminpct, anonminpct, fileminpct, t); 279 break; 280 case VM_FILEMIN: 281 UPDATEMIN(filemin, fileminpct, execminpct, anonminpct, t); 282 break; 283 case VM_ANONMAX: 284 UPDATEMAX(anonmax, anonmaxpct, t); 285 break; 286 case VM_EXECMAX: 287 UPDATEMAX(execmax, execmaxpct, t); 288 break; 289 case VM_FILEMAX: 290 UPDATEMAX(filemax, filemaxpct, t); 291 break; 292 default: 293 return (EINVAL); 294 } 295 296 #undef UPDATEMIN 297 #undef UPDATEMAX 298 299 return (0); 300 } 301 302 /* 303 * sysctl helper routine for uvm_pctparam. 304 */ 305 static int 306 sysctl_uvmpctparam(SYSCTLFN_ARGS) 307 { 308 int t, error; 309 struct sysctlnode node; 310 struct uvm_pctparam *pct; 311 312 pct = rnode->sysctl_data; 313 t = pct->pct_pct; 314 315 node = *rnode; 316 node.sysctl_data = &t; 317 t = *(int*)rnode->sysctl_data; 318 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 319 if (error || newp == NULL) 320 return error; 321 322 if (t < 0 || t > 100) 323 return EINVAL; 324 325 uvm_pctparam_set(pct, t); 326 327 return (0); 328 } 329 330 /* 331 * uvm_sysctl: sysctl hook into UVM system. 332 */ 333 SYSCTL_SETUP(sysctl_vm_setup, "sysctl vm subtree setup") 334 { 335 336 sysctl_createv(clog, 0, NULL, NULL, 337 CTLFLAG_PERMANENT, 338 CTLTYPE_NODE, "vm", NULL, 339 NULL, 0, NULL, 0, 340 CTL_VM, CTL_EOL); 341 sysctl_createv(clog, 0, NULL, NULL, 342 CTLFLAG_PERMANENT, 343 CTLTYPE_STRUCT, "vmmeter", 344 SYSCTL_DESCR("Simple system-wide virtual memory " 345 "statistics"), 346 sysctl_vm_meter, 0, NULL, sizeof(struct vmtotal), 347 CTL_VM, VM_METER, CTL_EOL); 348 sysctl_createv(clog, 0, NULL, NULL, 349 CTLFLAG_PERMANENT, 350 CTLTYPE_STRUCT, "loadavg", 351 SYSCTL_DESCR("System load average history"), 352 NULL, 0, &averunnable, sizeof(averunnable), 353 CTL_VM, VM_LOADAVG, CTL_EOL); 354 sysctl_createv(clog, 0, NULL, NULL, 355 CTLFLAG_PERMANENT, 356 CTLTYPE_STRUCT, "uvmexp", 357 SYSCTL_DESCR("Detailed system-wide virtual memory " 358 "statistics"), 359 sysctl_vm_uvmexp, 0, &uvmexp, sizeof(uvmexp), 360 CTL_VM, VM_UVMEXP, CTL_EOL); 361 sysctl_createv(clog, 0, NULL, NULL, 362 CTLFLAG_PERMANENT, 363 CTLTYPE_INT, "nkmempages", 364 SYSCTL_DESCR("Default number of pages in kmem_map"), 365 NULL, 0, &nkmempages, 0, 366 CTL_VM, VM_NKMEMPAGES, CTL_EOL); 367 sysctl_createv(clog, 0, NULL, NULL, 368 CTLFLAG_PERMANENT, 369 CTLTYPE_STRUCT, "uvmexp2", 370 SYSCTL_DESCR("Detailed system-wide virtual memory " 371 "statistics (MI)"), 372 sysctl_vm_uvmexp2, 0, NULL, 0, 373 CTL_VM, VM_UVMEXP2, CTL_EOL); 374 sysctl_createv(clog, 0, NULL, NULL, 375 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 376 CTLTYPE_INT, "anonmin", 377 SYSCTL_DESCR("Percentage of physical memory reserved " 378 "for anonymous application data"), 379 sysctl_vm_updateminmax, 0, &uvmexp.anonminpct, 0, 380 CTL_VM, VM_ANONMIN, CTL_EOL); 381 sysctl_createv(clog, 0, NULL, NULL, 382 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 383 CTLTYPE_INT, "execmin", 384 SYSCTL_DESCR("Percentage of physical memory reserved " 385 "for cached executable data"), 386 sysctl_vm_updateminmax, 0, &uvmexp.execminpct, 0, 387 CTL_VM, VM_EXECMIN, CTL_EOL); 388 sysctl_createv(clog, 0, NULL, NULL, 389 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 390 CTLTYPE_INT, "filemin", 391 SYSCTL_DESCR("Percentage of physical memory reserved " 392 "for cached file data"), 393 sysctl_vm_updateminmax, 0, &uvmexp.fileminpct, 0, 394 CTL_VM, VM_FILEMIN, CTL_EOL); 395 sysctl_createv(clog, 0, NULL, NULL, 396 CTLFLAG_PERMANENT, CTLTYPE_INT, "maxslp", 397 SYSCTL_DESCR("Maximum process sleep time before being " 398 "swapped"), 399 NULL, 0, &maxslp, 0, 400 CTL_VM, VM_MAXSLP, CTL_EOL); 401 sysctl_createv(clog, 0, NULL, NULL, 402 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 403 CTLTYPE_INT, "uspace", 404 SYSCTL_DESCR("Number of bytes allocated for a kernel " 405 "stack"), 406 NULL, USPACE, NULL, 0, 407 CTL_VM, VM_USPACE, CTL_EOL); 408 sysctl_createv(clog, 0, NULL, NULL, 409 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 410 CTLTYPE_INT, "anonmax", 411 SYSCTL_DESCR("Percentage of physical memory which will " 412 "be reclaimed from other usage for " 413 "anonymous application data"), 414 sysctl_vm_updateminmax, 0, &uvmexp.anonmaxpct, 0, 415 CTL_VM, VM_ANONMAX, CTL_EOL); 416 sysctl_createv(clog, 0, NULL, NULL, 417 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 418 CTLTYPE_INT, "execmax", 419 SYSCTL_DESCR("Percentage of physical memory which will " 420 "be reclaimed from other usage for cached " 421 "executable data"), 422 sysctl_vm_updateminmax, 0, &uvmexp.execmaxpct, 0, 423 CTL_VM, VM_EXECMAX, CTL_EOL); 424 sysctl_createv(clog, 0, NULL, NULL, 425 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 426 CTLTYPE_INT, "filemax", 427 SYSCTL_DESCR("Percentage of physical memory which will " 428 "be reclaimed from other usage for cached " 429 "file data"), 430 sysctl_vm_updateminmax, 0, &uvmexp.filemaxpct, 0, 431 CTL_VM, VM_FILEMAX, CTL_EOL); 432 sysctl_createv(clog, 0, NULL, NULL, 433 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 434 CTLTYPE_INT, "idlezero", 435 SYSCTL_DESCR("Whether try to zero pages in idle loop"), 436 NULL, 0, &vm_page_zero_enable, 0, 437 CTL_VM, CTL_CREATE, CTL_EOL); 438 sysctl_createv(clog, 0, NULL, NULL, 439 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 440 CTLTYPE_INT, "inactivepct", 441 SYSCTL_DESCR("Percentage of inactive queue of " 442 "the entire (active + inactive) queue"), 443 sysctl_uvmpctparam, 0, &uvmexp.inactivepct, 0, 444 CTL_VM, CTL_CREATE, CTL_EOL); 445 } 446 447 /* 448 * uvm_total: calculate the current state of the system. 449 */ 450 static void 451 uvm_total(struct vmtotal *totalp) 452 { 453 struct lwp *l; 454 #if 0 455 struct vm_map_entry * entry; 456 struct vm_map *map; 457 int paging; 458 #endif 459 460 memset(totalp, 0, sizeof *totalp); 461 462 /* 463 * calculate process statistics 464 */ 465 466 proclist_lock_read(); 467 LIST_FOREACH(l, &alllwp, l_list) { 468 if (l->l_proc->p_flag & P_SYSTEM) 469 continue; 470 switch (l->l_stat) { 471 case 0: 472 continue; 473 474 case LSSLEEP: 475 case LSSTOP: 476 if (l->l_flag & L_INMEM) { 477 if (l->l_priority <= PZERO) 478 totalp->t_dw++; 479 else if (l->l_slptime < maxslp) 480 totalp->t_sl++; 481 } else if (l->l_slptime < maxslp) 482 totalp->t_sw++; 483 if (l->l_slptime >= maxslp) 484 continue; 485 break; 486 487 case LSRUN: 488 case LSONPROC: 489 case LSIDL: 490 if (l->l_flag & L_INMEM) 491 totalp->t_rq++; 492 else 493 totalp->t_sw++; 494 if (l->l_stat == LSIDL) 495 continue; 496 break; 497 } 498 /* 499 * note active objects 500 */ 501 #if 0 502 /* 503 * XXXCDC: BOGUS! rethink this. in the mean time 504 * don't do it. 505 */ 506 paging = 0; 507 vm_map_lock(map); 508 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 509 entry != &map->header; entry = entry->next) { 510 if (entry->is_a_map || entry->is_sub_map || 511 entry->object.uvm_obj == NULL) 512 continue; 513 /* XXX how to do this with uvm */ 514 } 515 vm_map_unlock(map); 516 if (paging) 517 totalp->t_pw++; 518 #endif 519 } 520 proclist_unlock_read(); 521 /* 522 * Calculate object memory usage statistics. 523 */ 524 totalp->t_free = uvmexp.free; 525 totalp->t_vm = uvmexp.npages - uvmexp.free + uvmexp.swpginuse; 526 totalp->t_avm = uvmexp.active + uvmexp.swpginuse; /* XXX */ 527 totalp->t_rm = uvmexp.npages - uvmexp.free; 528 totalp->t_arm = uvmexp.active; 529 totalp->t_vmshr = 0; /* XXX */ 530 totalp->t_avmshr = 0; /* XXX */ 531 totalp->t_rmshr = 0; /* XXX */ 532 totalp->t_armshr = 0; /* XXX */ 533 } 534 535 void 536 uvm_pctparam_set(struct uvm_pctparam *pct, int val) 537 { 538 539 pct->pct_pct = val; 540 pct->pct_scaled = val * UVM_PCTPARAM_SCALE / 100; 541 } 542