uvm_meter.c revision 1.50
1 /* $NetBSD: uvm_meter.c,v 1.50 2009/10/21 21:12:07 rmind 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 1.50 2009/10/21 21:12:07 rmind Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/proc.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/sysctl.h> 51 52 #include <uvm/uvm_extern.h> 53 #include <uvm/uvm_pdpolicy.h> 54 55 /* 56 * maxslp: ???? XXXCDC 57 */ 58 59 int maxslp = MAXSLP; /* patchable ... */ 60 struct loadavg averunnable; 61 62 /* 63 * constants for averages over 1, 5, and 15 minutes when sampling at 64 * 5 second intervals. 65 */ 66 67 static const fixpt_t cexp[3] = { 68 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 69 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 70 0.9944598480048967 * FSCALE, /* exp(-1/180) */ 71 }; 72 73 /* 74 * prototypes 75 */ 76 77 static void uvm_loadav(struct loadavg *); 78 static void uvm_total(struct vmtotal *); 79 80 /* 81 * uvm_meter: calculate load average. 82 */ 83 void 84 uvm_meter(void) 85 { 86 static int count; 87 88 if (++count >= 5) { 89 count = 0; 90 uvm_loadav(&averunnable); 91 } 92 } 93 94 /* 95 * uvm_loadav: compute a tenex style load average of a quantity on 96 * 1, 5, and 15 minute intervals. 97 */ 98 static void 99 uvm_loadav(struct loadavg *avg) 100 { 101 int i, nrun; 102 struct lwp *l; 103 104 nrun = 0; 105 106 mutex_enter(proc_lock); 107 LIST_FOREACH(l, &alllwp, l_list) { 108 if ((l->l_flag & (LW_SINTR | LW_SYSTEM)) != 0) 109 continue; 110 switch (l->l_stat) { 111 case LSSLEEP: 112 if (l->l_slptime > 1) 113 continue; 114 /* fall through */ 115 case LSRUN: 116 case LSONPROC: 117 case LSIDL: 118 nrun++; 119 } 120 } 121 mutex_exit(proc_lock); 122 123 for (i = 0; i < 3; i++) 124 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 125 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 126 } 127 128 /* 129 * sysctl helper routine for the vm.vmmeter node. 130 */ 131 static int 132 sysctl_vm_meter(SYSCTLFN_ARGS) 133 { 134 struct sysctlnode node; 135 struct vmtotal vmtotals; 136 137 node = *rnode; 138 node.sysctl_data = &vmtotals; 139 uvm_total(&vmtotals); 140 141 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 142 } 143 144 /* 145 * sysctl helper routine for the vm.uvmexp node. 146 */ 147 static int 148 sysctl_vm_uvmexp(SYSCTLFN_ARGS) 149 { 150 struct sysctlnode node; 151 152 node = *rnode; 153 if (oldp) 154 node.sysctl_size = min(*oldlenp, node.sysctl_size); 155 156 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 157 } 158 159 static int 160 sysctl_vm_uvmexp2(SYSCTLFN_ARGS) 161 { 162 struct sysctlnode node; 163 struct uvmexp_sysctl u; 164 int active, inactive; 165 166 uvm_estimatepageable(&active, &inactive); 167 168 memset(&u, 0, sizeof(u)); 169 170 /* Entries here are in order of uvmexp_sysctl, not uvmexp */ 171 u.pagesize = uvmexp.pagesize; 172 u.pagemask = uvmexp.pagemask; 173 u.pageshift = uvmexp.pageshift; 174 u.npages = uvmexp.npages; 175 u.free = uvmexp.free; 176 u.active = active; 177 u.inactive = inactive; 178 u.paging = uvmexp.paging; 179 u.wired = uvmexp.wired; 180 u.zeropages = uvmexp.zeropages; 181 u.reserve_pagedaemon = uvmexp.reserve_pagedaemon; 182 u.reserve_kernel = uvmexp.reserve_kernel; 183 u.freemin = uvmexp.freemin; 184 u.freetarg = uvmexp.freetarg; 185 u.inactarg = 0; /* unused */ 186 u.wiredmax = uvmexp.wiredmax; 187 u.nswapdev = uvmexp.nswapdev; 188 u.swpages = uvmexp.swpages; 189 u.swpginuse = uvmexp.swpginuse; 190 u.swpgonly = uvmexp.swpgonly; 191 u.nswget = uvmexp.nswget; 192 u.faults = uvmexp.faults; 193 u.traps = uvmexp.traps; 194 u.intrs = uvmexp.intrs; 195 u.swtch = uvmexp.swtch; 196 u.softs = uvmexp.softs; 197 u.syscalls = uvmexp.syscalls; 198 u.pageins = uvmexp.pageins; 199 u.pgswapin = uvmexp.pgswapin; 200 u.pgswapout = uvmexp.pgswapout; 201 u.forks = uvmexp.forks; 202 u.forks_ppwait = uvmexp.forks_ppwait; 203 u.forks_sharevm = uvmexp.forks_sharevm; 204 u.pga_zerohit = uvmexp.pga_zerohit; 205 u.pga_zeromiss = uvmexp.pga_zeromiss; 206 u.zeroaborts = uvmexp.zeroaborts; 207 u.fltnoram = uvmexp.fltnoram; 208 u.fltnoanon = uvmexp.fltnoanon; 209 u.fltpgwait = uvmexp.fltpgwait; 210 u.fltpgrele = uvmexp.fltpgrele; 211 u.fltrelck = uvmexp.fltrelck; 212 u.fltrelckok = uvmexp.fltrelckok; 213 u.fltanget = uvmexp.fltanget; 214 u.fltanretry = uvmexp.fltanretry; 215 u.fltamcopy = uvmexp.fltamcopy; 216 u.fltnamap = uvmexp.fltnamap; 217 u.fltnomap = uvmexp.fltnomap; 218 u.fltlget = uvmexp.fltlget; 219 u.fltget = uvmexp.fltget; 220 u.flt_anon = uvmexp.flt_anon; 221 u.flt_acow = uvmexp.flt_acow; 222 u.flt_obj = uvmexp.flt_obj; 223 u.flt_prcopy = uvmexp.flt_prcopy; 224 u.flt_przero = uvmexp.flt_przero; 225 u.pdwoke = uvmexp.pdwoke; 226 u.pdrevs = uvmexp.pdrevs; 227 u.pdfreed = uvmexp.pdfreed; 228 u.pdscans = uvmexp.pdscans; 229 u.pdanscan = uvmexp.pdanscan; 230 u.pdobscan = uvmexp.pdobscan; 231 u.pdreact = uvmexp.pdreact; 232 u.pdbusy = uvmexp.pdbusy; 233 u.pdpageouts = uvmexp.pdpageouts; 234 u.pdpending = uvmexp.pdpending; 235 u.pddeact = uvmexp.pddeact; 236 u.anonpages = uvmexp.anonpages; 237 u.filepages = uvmexp.filepages; 238 u.execpages = uvmexp.execpages; 239 u.colorhit = uvmexp.colorhit; 240 u.colormiss = uvmexp.colormiss; 241 u.cpuhit = uvmexp.cpuhit; 242 u.cpumiss = uvmexp.cpumiss; 243 244 node = *rnode; 245 node.sysctl_data = &u; 246 node.sysctl_size = sizeof(u); 247 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 248 } 249 250 /* 251 * sysctl helper routine for uvm_pctparam. 252 */ 253 static int 254 uvm_sysctlpctparam(SYSCTLFN_ARGS) 255 { 256 int t, error; 257 struct sysctlnode node; 258 struct uvm_pctparam *pct; 259 260 pct = rnode->sysctl_data; 261 t = pct->pct_pct; 262 263 node = *rnode; 264 node.sysctl_data = &t; 265 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 266 if (error || newp == NULL) 267 return error; 268 269 if (t < 0 || t > 100) 270 return EINVAL; 271 272 error = uvm_pctparam_check(pct, t); 273 if (error) { 274 return error; 275 } 276 uvm_pctparam_set(pct, t); 277 278 return (0); 279 } 280 281 /* 282 * uvm_sysctl: sysctl hook into UVM system. 283 */ 284 SYSCTL_SETUP(sysctl_vm_setup, "sysctl vm subtree setup") 285 { 286 287 sysctl_createv(clog, 0, NULL, NULL, 288 CTLFLAG_PERMANENT, 289 CTLTYPE_NODE, "vm", NULL, 290 NULL, 0, NULL, 0, 291 CTL_VM, CTL_EOL); 292 sysctl_createv(clog, 0, NULL, NULL, 293 CTLFLAG_PERMANENT, 294 CTLTYPE_STRUCT, "vmmeter", 295 SYSCTL_DESCR("Simple system-wide virtual memory " 296 "statistics"), 297 sysctl_vm_meter, 0, NULL, sizeof(struct vmtotal), 298 CTL_VM, VM_METER, CTL_EOL); 299 sysctl_createv(clog, 0, NULL, NULL, 300 CTLFLAG_PERMANENT, 301 CTLTYPE_STRUCT, "loadavg", 302 SYSCTL_DESCR("System load average history"), 303 NULL, 0, &averunnable, sizeof(averunnable), 304 CTL_VM, VM_LOADAVG, CTL_EOL); 305 sysctl_createv(clog, 0, NULL, NULL, 306 CTLFLAG_PERMANENT, 307 CTLTYPE_STRUCT, "uvmexp", 308 SYSCTL_DESCR("Detailed system-wide virtual memory " 309 "statistics"), 310 sysctl_vm_uvmexp, 0, &uvmexp, sizeof(uvmexp), 311 CTL_VM, VM_UVMEXP, CTL_EOL); 312 sysctl_createv(clog, 0, NULL, NULL, 313 CTLFLAG_PERMANENT, 314 CTLTYPE_INT, "nkmempages", 315 SYSCTL_DESCR("Default number of pages in kmem_map"), 316 NULL, 0, &nkmempages, 0, 317 CTL_VM, VM_NKMEMPAGES, CTL_EOL); 318 sysctl_createv(clog, 0, NULL, NULL, 319 CTLFLAG_PERMANENT, 320 CTLTYPE_STRUCT, "uvmexp2", 321 SYSCTL_DESCR("Detailed system-wide virtual memory " 322 "statistics (MI)"), 323 sysctl_vm_uvmexp2, 0, NULL, 0, 324 CTL_VM, VM_UVMEXP2, CTL_EOL); 325 sysctl_createv(clog, 0, NULL, NULL, 326 CTLFLAG_PERMANENT, CTLTYPE_INT, "maxslp", 327 SYSCTL_DESCR("Maximum process sleep time before being " 328 "swapped"), 329 NULL, 0, &maxslp, 0, 330 CTL_VM, VM_MAXSLP, CTL_EOL); 331 sysctl_createv(clog, 0, NULL, NULL, 332 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 333 CTLTYPE_INT, "uspace", 334 SYSCTL_DESCR("Number of bytes allocated for a kernel " 335 "stack"), 336 NULL, USPACE, NULL, 0, 337 CTL_VM, VM_USPACE, CTL_EOL); 338 sysctl_createv(clog, 0, NULL, NULL, 339 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 340 CTLTYPE_INT, "idlezero", 341 SYSCTL_DESCR("Whether try to zero pages in idle loop"), 342 NULL, 0, &vm_page_zero_enable, 0, 343 CTL_VM, CTL_CREATE, CTL_EOL); 344 345 uvmpdpol_sysctlsetup(); 346 } 347 348 /* 349 * uvm_total: calculate the current state of the system. 350 */ 351 static void 352 uvm_total(struct vmtotal *totalp) 353 { 354 struct lwp *l; 355 #if 0 356 struct vm_map_entry * entry; 357 struct vm_map *map; 358 int paging; 359 #endif 360 int active; 361 362 memset(totalp, 0, sizeof *totalp); 363 364 /* 365 * calculate process statistics 366 */ 367 mutex_enter(proc_lock); 368 LIST_FOREACH(l, &alllwp, l_list) { 369 if (l->l_proc->p_flag & PK_SYSTEM) 370 continue; 371 switch (l->l_stat) { 372 case 0: 373 continue; 374 375 case LSSLEEP: 376 case LSSTOP: 377 if (lwp_eprio(l) <= PZERO) { 378 totalp->t_dw++; 379 } else if (l->l_slptime < maxslp) { 380 totalp->t_sl++; 381 } 382 if (l->l_slptime >= maxslp) 383 continue; 384 break; 385 386 case LSRUN: 387 case LSONPROC: 388 case LSIDL: 389 totalp->t_rq++; 390 if (l->l_stat == LSIDL) 391 continue; 392 break; 393 } 394 /* 395 * note active objects 396 */ 397 #if 0 398 /* 399 * XXXCDC: BOGUS! rethink this. in the mean time 400 * don't do it. 401 */ 402 paging = 0; 403 vm_map_lock(map); 404 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 405 entry != &map->header; entry = entry->next) { 406 if (entry->is_a_map || entry->is_sub_map || 407 entry->object.uvm_obj == NULL) 408 continue; 409 /* XXX how to do this with uvm */ 410 } 411 vm_map_unlock(map); 412 if (paging) 413 totalp->t_pw++; 414 #endif 415 } 416 mutex_exit(proc_lock); 417 418 /* 419 * Calculate object memory usage statistics. 420 */ 421 uvm_estimatepageable(&active, NULL); 422 totalp->t_free = uvmexp.free; 423 totalp->t_vm = uvmexp.npages - uvmexp.free + uvmexp.swpginuse; 424 totalp->t_avm = active + uvmexp.swpginuse; /* XXX */ 425 totalp->t_rm = uvmexp.npages - uvmexp.free; 426 totalp->t_arm = active; 427 totalp->t_vmshr = 0; /* XXX */ 428 totalp->t_avmshr = 0; /* XXX */ 429 totalp->t_rmshr = 0; /* XXX */ 430 totalp->t_armshr = 0; /* XXX */ 431 } 432 433 void 434 uvm_pctparam_set(struct uvm_pctparam *pct, int val) 435 { 436 437 pct->pct_pct = val; 438 pct->pct_scaled = val * UVM_PCTPARAM_SCALE / 100; 439 } 440 441 int 442 uvm_pctparam_get(struct uvm_pctparam *pct) 443 { 444 445 return pct->pct_pct; 446 } 447 448 int 449 uvm_pctparam_check(struct uvm_pctparam *pct, int val) 450 { 451 452 if (pct->pct_check == NULL) { 453 return 0; 454 } 455 return (*pct->pct_check)(pct, val); 456 } 457 458 void 459 uvm_pctparam_init(struct uvm_pctparam *pct, int val, 460 int (*fn)(struct uvm_pctparam *, int)) 461 { 462 463 pct->pct_check = fn; 464 uvm_pctparam_set(pct, val); 465 } 466 467 int 468 uvm_pctparam_createsysctlnode(struct uvm_pctparam *pct, const char *name, 469 const char *desc) 470 { 471 472 return sysctl_createv(NULL, 0, NULL, NULL, 473 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 474 CTLTYPE_INT, name, SYSCTL_DESCR(desc), 475 uvm_sysctlpctparam, 0, pct, 0, CTL_VM, CTL_CREATE, CTL_EOL); 476 } 477
Indexes created Thu Sep 25 16:09:42 GMT 2025