uvm_meter.c revision 1.44
1 /* $NetBSD: uvm_meter.c,v 1.44 2007/02/09 21:55:43 ad 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 1.44 2007/02/09 21:55:43 ad 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 and wake up the swapper (if needed) 82 */ 83 void 84 uvm_meter(void) 85 { 86 if ((time_second % 5) == 0) 87 uvm_loadav(&averunnable); 88 if (lwp0.l_slptime > (maxslp / 2)) 89 wakeup(&proc0); 90 } 91 92 /* 93 * uvm_loadav: compute a tenex style load average of a quantity on 94 * 1, 5, and 15 minute intervals. */ 95 static void 96 uvm_loadav(struct loadavg *avg) 97 { 98 int i, nrun; 99 struct lwp *l; 100 101 mutex_enter(&proclist_mutex); 102 nrun = 0; 103 LIST_FOREACH(l, &alllwp, l_list) { 104 switch (l->l_stat) { 105 case LSSLEEP: 106 if (l->l_priority > PZERO || l->l_slptime > 1) 107 continue; 108 /* fall through */ 109 case LSRUN: 110 case LSONPROC: 111 case LSIDL: 112 nrun++; 113 } 114 } 115 mutex_exit(&proclist_mutex); 116 for (i = 0; i < 3; i++) 117 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 118 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 119 } 120 121 /* 122 * sysctl helper routine for the vm.vmmeter node. 123 */ 124 static int 125 sysctl_vm_meter(SYSCTLFN_ARGS) 126 { 127 struct sysctlnode node; 128 struct vmtotal vmtotals; 129 130 node = *rnode; 131 node.sysctl_data = &vmtotals; 132 uvm_total(&vmtotals); 133 134 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 135 } 136 137 /* 138 * sysctl helper routine for the vm.uvmexp node. 139 */ 140 static int 141 sysctl_vm_uvmexp(SYSCTLFN_ARGS) 142 { 143 struct sysctlnode node; 144 145 node = *rnode; 146 if (oldp) 147 node.sysctl_size = min(*oldlenp, node.sysctl_size); 148 149 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 150 } 151 152 static int 153 sysctl_vm_uvmexp2(SYSCTLFN_ARGS) 154 { 155 struct sysctlnode node; 156 struct uvmexp_sysctl u; 157 int active, inactive; 158 159 uvm_estimatepageable(&active, &inactive); 160 161 memset(&u, 0, sizeof(u)); 162 163 /* Entries here are in order of uvmexp_sysctl, not uvmexp */ 164 u.pagesize = uvmexp.pagesize; 165 u.pagemask = uvmexp.pagemask; 166 u.pageshift = uvmexp.pageshift; 167 u.npages = uvmexp.npages; 168 u.free = uvmexp.free; 169 u.active = active; 170 u.inactive = inactive; 171 u.paging = uvmexp.paging; 172 u.wired = uvmexp.wired; 173 u.zeropages = uvmexp.zeropages; 174 u.reserve_pagedaemon = uvmexp.reserve_pagedaemon; 175 u.reserve_kernel = uvmexp.reserve_kernel; 176 u.freemin = uvmexp.freemin; 177 u.freetarg = uvmexp.freetarg; 178 u.inactarg = 0; /* unused */ 179 u.wiredmax = uvmexp.wiredmax; 180 u.nswapdev = uvmexp.nswapdev; 181 u.swpages = uvmexp.swpages; 182 u.swpginuse = uvmexp.swpginuse; 183 u.swpgonly = uvmexp.swpgonly; 184 u.nswget = uvmexp.nswget; 185 u.faults = uvmexp.faults; 186 u.traps = uvmexp.traps; 187 u.intrs = uvmexp.intrs; 188 u.swtch = uvmexp.swtch; 189 u.softs = uvmexp.softs; 190 u.syscalls = uvmexp.syscalls; 191 u.pageins = uvmexp.pageins; 192 u.swapins = uvmexp.swapins; 193 u.swapouts = uvmexp.swapouts; 194 u.pgswapin = uvmexp.pgswapin; 195 u.pgswapout = uvmexp.pgswapout; 196 u.forks = uvmexp.forks; 197 u.forks_ppwait = uvmexp.forks_ppwait; 198 u.forks_sharevm = uvmexp.forks_sharevm; 199 u.pga_zerohit = uvmexp.pga_zerohit; 200 u.pga_zeromiss = uvmexp.pga_zeromiss; 201 u.zeroaborts = uvmexp.zeroaborts; 202 u.fltnoram = uvmexp.fltnoram; 203 u.fltnoanon = uvmexp.fltnoanon; 204 u.fltpgwait = uvmexp.fltpgwait; 205 u.fltpgrele = uvmexp.fltpgrele; 206 u.fltrelck = uvmexp.fltrelck; 207 u.fltrelckok = uvmexp.fltrelckok; 208 u.fltanget = uvmexp.fltanget; 209 u.fltanretry = uvmexp.fltanretry; 210 u.fltamcopy = uvmexp.fltamcopy; 211 u.fltnamap = uvmexp.fltnamap; 212 u.fltnomap = uvmexp.fltnomap; 213 u.fltlget = uvmexp.fltlget; 214 u.fltget = uvmexp.fltget; 215 u.flt_anon = uvmexp.flt_anon; 216 u.flt_acow = uvmexp.flt_acow; 217 u.flt_obj = uvmexp.flt_obj; 218 u.flt_prcopy = uvmexp.flt_prcopy; 219 u.flt_przero = uvmexp.flt_przero; 220 u.pdwoke = uvmexp.pdwoke; 221 u.pdrevs = uvmexp.pdrevs; 222 u.pdswout = uvmexp.pdswout; 223 u.pdfreed = uvmexp.pdfreed; 224 u.pdscans = uvmexp.pdscans; 225 u.pdanscan = uvmexp.pdanscan; 226 u.pdobscan = uvmexp.pdobscan; 227 u.pdreact = uvmexp.pdreact; 228 u.pdbusy = uvmexp.pdbusy; 229 u.pdpageouts = uvmexp.pdpageouts; 230 u.pdpending = uvmexp.pdpending; 231 u.pddeact = uvmexp.pddeact; 232 u.anonpages = uvmexp.anonpages; 233 u.filepages = uvmexp.filepages; 234 u.execpages = uvmexp.execpages; 235 u.colorhit = uvmexp.colorhit; 236 u.colormiss = uvmexp.colormiss; 237 238 node = *rnode; 239 node.sysctl_data = &u; 240 node.sysctl_size = sizeof(u); 241 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 242 } 243 244 /* 245 * sysctl helper routine for uvm_pctparam. 246 */ 247 static int 248 uvm_sysctlpctparam(SYSCTLFN_ARGS) 249 { 250 int t, error; 251 struct sysctlnode node; 252 struct uvm_pctparam *pct; 253 254 pct = rnode->sysctl_data; 255 t = pct->pct_pct; 256 257 node = *rnode; 258 node.sysctl_data = &t; 259 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 260 if (error || newp == NULL) 261 return error; 262 263 if (t < 0 || t > 100) 264 return EINVAL; 265 266 error = uvm_pctparam_check(pct, t); 267 if (error) { 268 return error; 269 } 270 uvm_pctparam_set(pct, t); 271 272 return (0); 273 } 274 275 /* 276 * uvm_sysctl: sysctl hook into UVM system. 277 */ 278 SYSCTL_SETUP(sysctl_vm_setup, "sysctl vm subtree setup") 279 { 280 281 sysctl_createv(clog, 0, NULL, NULL, 282 CTLFLAG_PERMANENT, 283 CTLTYPE_NODE, "vm", NULL, 284 NULL, 0, NULL, 0, 285 CTL_VM, CTL_EOL); 286 sysctl_createv(clog, 0, NULL, NULL, 287 CTLFLAG_PERMANENT, 288 CTLTYPE_STRUCT, "vmmeter", 289 SYSCTL_DESCR("Simple system-wide virtual memory " 290 "statistics"), 291 sysctl_vm_meter, 0, NULL, sizeof(struct vmtotal), 292 CTL_VM, VM_METER, CTL_EOL); 293 sysctl_createv(clog, 0, NULL, NULL, 294 CTLFLAG_PERMANENT, 295 CTLTYPE_STRUCT, "loadavg", 296 SYSCTL_DESCR("System load average history"), 297 NULL, 0, &averunnable, sizeof(averunnable), 298 CTL_VM, VM_LOADAVG, CTL_EOL); 299 sysctl_createv(clog, 0, NULL, NULL, 300 CTLFLAG_PERMANENT, 301 CTLTYPE_STRUCT, "uvmexp", 302 SYSCTL_DESCR("Detailed system-wide virtual memory " 303 "statistics"), 304 sysctl_vm_uvmexp, 0, &uvmexp, sizeof(uvmexp), 305 CTL_VM, VM_UVMEXP, CTL_EOL); 306 sysctl_createv(clog, 0, NULL, NULL, 307 CTLFLAG_PERMANENT, 308 CTLTYPE_INT, "nkmempages", 309 SYSCTL_DESCR("Default number of pages in kmem_map"), 310 NULL, 0, &nkmempages, 0, 311 CTL_VM, VM_NKMEMPAGES, CTL_EOL); 312 sysctl_createv(clog, 0, NULL, NULL, 313 CTLFLAG_PERMANENT, 314 CTLTYPE_STRUCT, "uvmexp2", 315 SYSCTL_DESCR("Detailed system-wide virtual memory " 316 "statistics (MI)"), 317 sysctl_vm_uvmexp2, 0, NULL, 0, 318 CTL_VM, VM_UVMEXP2, CTL_EOL); 319 sysctl_createv(clog, 0, NULL, NULL, 320 CTLFLAG_PERMANENT, CTLTYPE_INT, "maxslp", 321 SYSCTL_DESCR("Maximum process sleep time before being " 322 "swapped"), 323 NULL, 0, &maxslp, 0, 324 CTL_VM, VM_MAXSLP, CTL_EOL); 325 sysctl_createv(clog, 0, NULL, NULL, 326 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 327 CTLTYPE_INT, "uspace", 328 SYSCTL_DESCR("Number of bytes allocated for a kernel " 329 "stack"), 330 NULL, USPACE, NULL, 0, 331 CTL_VM, VM_USPACE, CTL_EOL); 332 sysctl_createv(clog, 0, NULL, NULL, 333 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 334 CTLTYPE_INT, "idlezero", 335 SYSCTL_DESCR("Whether try to zero pages in idle loop"), 336 NULL, 0, &vm_page_zero_enable, 0, 337 CTL_VM, CTL_CREATE, CTL_EOL); 338 339 uvmpdpol_sysctlsetup(); 340 } 341 342 /* 343 * uvm_total: calculate the current state of the system. 344 */ 345 static void 346 uvm_total(struct vmtotal *totalp) 347 { 348 struct lwp *l; 349 #if 0 350 struct vm_map_entry * entry; 351 struct vm_map *map; 352 int paging; 353 #endif 354 int active; 355 356 memset(totalp, 0, sizeof *totalp); 357 358 /* 359 * calculate process statistics 360 */ 361 mutex_enter(&proclist_mutex); 362 LIST_FOREACH(l, &alllwp, l_list) { 363 if (l->l_proc->p_flag & P_SYSTEM) 364 continue; 365 switch (l->l_stat) { 366 case 0: 367 continue; 368 369 case LSSLEEP: 370 case LSSTOP: 371 if (l->l_flag & L_INMEM) { 372 if (l->l_priority <= PZERO) 373 totalp->t_dw++; 374 else if (l->l_slptime < maxslp) 375 totalp->t_sl++; 376 } else if (l->l_slptime < maxslp) 377 totalp->t_sw++; 378 if (l->l_slptime >= maxslp) 379 continue; 380 break; 381 382 case LSRUN: 383 case LSONPROC: 384 case LSIDL: 385 if (l->l_flag & L_INMEM) 386 totalp->t_rq++; 387 else 388 totalp->t_sw++; 389 if (l->l_stat == LSIDL) 390 continue; 391 break; 392 } 393 /* 394 * note active objects 395 */ 396 #if 0 397 /* 398 * XXXCDC: BOGUS! rethink this. in the mean time 399 * don't do it. 400 */ 401 paging = 0; 402 vm_map_lock(map); 403 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 404 entry != &map->header; entry = entry->next) { 405 if (entry->is_a_map || entry->is_sub_map || 406 entry->object.uvm_obj == NULL) 407 continue; 408 /* XXX how to do this with uvm */ 409 } 410 vm_map_unlock(map); 411 if (paging) 412 totalp->t_pw++; 413 #endif 414 } 415 mutex_exit(&proclist_mutex); 416 417 /* 418 * Calculate object memory usage statistics. 419 */ 420 uvm_estimatepageable(&active, NULL); 421 totalp->t_free = uvmexp.free; 422 totalp->t_vm = uvmexp.npages - uvmexp.free + uvmexp.swpginuse; 423 totalp->t_avm = active + uvmexp.swpginuse; /* XXX */ 424 totalp->t_rm = uvmexp.npages - uvmexp.free; 425 totalp->t_arm = active; 426 totalp->t_vmshr = 0; /* XXX */ 427 totalp->t_avmshr = 0; /* XXX */ 428 totalp->t_rmshr = 0; /* XXX */ 429 totalp->t_armshr = 0; /* XXX */ 430 } 431 432 void 433 uvm_pctparam_set(struct uvm_pctparam *pct, int val) 434 { 435 436 pct->pct_pct = val; 437 pct->pct_scaled = val * UVM_PCTPARAM_SCALE / 100; 438 } 439 440 int 441 uvm_pctparam_get(struct uvm_pctparam *pct) 442 { 443 444 return pct->pct_pct; 445 } 446 447 int 448 uvm_pctparam_check(struct uvm_pctparam *pct, int val) 449 { 450 451 if (pct->pct_check == NULL) { 452 return 0; 453 } 454 return (*pct->pct_check)(pct, val); 455 } 456 457 void 458 uvm_pctparam_init(struct uvm_pctparam *pct, int val, 459 int (*fn)(struct uvm_pctparam *, int)) 460 { 461 462 pct->pct_check = fn; 463 uvm_pctparam_set(pct, val); 464 } 465 466 int 467 uvm_pctparam_createsysctlnode(struct uvm_pctparam *pct, const char *name, 468 const char *desc) 469 { 470 471 return sysctl_createv(NULL, 0, NULL, NULL, 472 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 473 CTLTYPE_INT, name, SYSCTL_DESCR(desc), 474 uvm_sysctlpctparam, 0, pct, 0, CTL_VM, CTL_CREATE, CTL_EOL); 475 } 476
Indexes created Sun Sep 21 20:09:37 GMT 2025