uvm_meter.c revision 1.41
1 /* $NetBSD: uvm_meter.c,v 1.41 2006/09/15 15:51:13 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 1.41 2006/09/15 15:51:13 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 <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 internvals. 95 */ 96 static void 97 uvm_loadav(struct loadavg *avg) 98 { 99 int i, nrun; 100 struct lwp *l; 101 102 proclist_lock_read(); 103 nrun = 0; 104 LIST_FOREACH(l, &alllwp, l_list) { 105 switch (l->l_stat) { 106 case LSSLEEP: 107 if (l->l_priority > PZERO || l->l_slptime > 1) 108 continue; 109 /* fall through */ 110 case LSRUN: 111 case LSONPROC: 112 case LSIDL: 113 nrun++; 114 } 115 } 116 proclist_unlock_read(); 117 for (i = 0; i < 3; i++) 118 avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + 119 nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; 120 } 121 122 /* 123 * sysctl helper routine for the vm.vmmeter node. 124 */ 125 static int 126 sysctl_vm_meter(SYSCTLFN_ARGS) 127 { 128 struct sysctlnode node; 129 struct vmtotal vmtotals; 130 131 node = *rnode; 132 node.sysctl_data = &vmtotals; 133 uvm_total(&vmtotals); 134 135 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 136 } 137 138 /* 139 * sysctl helper routine for the vm.uvmexp node. 140 */ 141 static int 142 sysctl_vm_uvmexp(SYSCTLFN_ARGS) 143 { 144 struct sysctlnode node; 145 146 node = *rnode; 147 if (oldp) 148 node.sysctl_size = min(*oldlenp, node.sysctl_size); 149 150 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 151 } 152 153 static int 154 sysctl_vm_uvmexp2(SYSCTLFN_ARGS) 155 { 156 struct sysctlnode node; 157 struct uvmexp_sysctl u; 158 int active, inactive; 159 160 uvm_estimatepageable(&active, &inactive); 161 162 memset(&u, 0, sizeof(u)); 163 164 /* Entries here are in order of uvmexp_sysctl, not uvmexp */ 165 u.pagesize = uvmexp.pagesize; 166 u.pagemask = uvmexp.pagemask; 167 u.pageshift = uvmexp.pageshift; 168 u.npages = uvmexp.npages; 169 u.free = uvmexp.free; 170 u.active = active; 171 u.inactive = inactive; 172 u.paging = uvmexp.paging; 173 u.wired = uvmexp.wired; 174 u.zeropages = uvmexp.zeropages; 175 u.reserve_pagedaemon = uvmexp.reserve_pagedaemon; 176 u.reserve_kernel = uvmexp.reserve_kernel; 177 u.freemin = uvmexp.freemin; 178 u.freetarg = uvmexp.freetarg; 179 u.inactarg = 0; /* unused */ 180 u.wiredmax = uvmexp.wiredmax; 181 u.nswapdev = uvmexp.nswapdev; 182 u.swpages = uvmexp.swpages; 183 u.swpginuse = uvmexp.swpginuse; 184 u.swpgonly = uvmexp.swpgonly; 185 u.nswget = uvmexp.nswget; 186 u.faults = uvmexp.faults; 187 u.traps = uvmexp.traps; 188 u.intrs = uvmexp.intrs; 189 u.swtch = uvmexp.swtch; 190 u.softs = uvmexp.softs; 191 u.syscalls = uvmexp.syscalls; 192 u.pageins = uvmexp.pageins; 193 u.swapins = uvmexp.swapins; 194 u.swapouts = uvmexp.swapouts; 195 u.pgswapin = uvmexp.pgswapin; 196 u.pgswapout = uvmexp.pgswapout; 197 u.forks = uvmexp.forks; 198 u.forks_ppwait = uvmexp.forks_ppwait; 199 u.forks_sharevm = uvmexp.forks_sharevm; 200 u.pga_zerohit = uvmexp.pga_zerohit; 201 u.pga_zeromiss = uvmexp.pga_zeromiss; 202 u.zeroaborts = uvmexp.zeroaborts; 203 u.fltnoram = uvmexp.fltnoram; 204 u.fltnoanon = uvmexp.fltnoanon; 205 u.fltpgwait = uvmexp.fltpgwait; 206 u.fltpgrele = uvmexp.fltpgrele; 207 u.fltrelck = uvmexp.fltrelck; 208 u.fltrelckok = uvmexp.fltrelckok; 209 u.fltanget = uvmexp.fltanget; 210 u.fltanretry = uvmexp.fltanretry; 211 u.fltamcopy = uvmexp.fltamcopy; 212 u.fltnamap = uvmexp.fltnamap; 213 u.fltnomap = uvmexp.fltnomap; 214 u.fltlget = uvmexp.fltlget; 215 u.fltget = uvmexp.fltget; 216 u.flt_anon = uvmexp.flt_anon; 217 u.flt_acow = uvmexp.flt_acow; 218 u.flt_obj = uvmexp.flt_obj; 219 u.flt_prcopy = uvmexp.flt_prcopy; 220 u.flt_przero = uvmexp.flt_przero; 221 u.pdwoke = uvmexp.pdwoke; 222 u.pdrevs = uvmexp.pdrevs; 223 u.pdswout = uvmexp.pdswout; 224 u.pdfreed = uvmexp.pdfreed; 225 u.pdscans = uvmexp.pdscans; 226 u.pdanscan = uvmexp.pdanscan; 227 u.pdobscan = uvmexp.pdobscan; 228 u.pdreact = uvmexp.pdreact; 229 u.pdbusy = uvmexp.pdbusy; 230 u.pdpageouts = uvmexp.pdpageouts; 231 u.pdpending = uvmexp.pdpending; 232 u.pddeact = uvmexp.pddeact; 233 u.anonpages = uvmexp.anonpages; 234 u.filepages = uvmexp.filepages; 235 u.execpages = uvmexp.execpages; 236 u.colorhit = uvmexp.colorhit; 237 u.colormiss = uvmexp.colormiss; 238 239 node = *rnode; 240 node.sysctl_data = &u; 241 node.sysctl_size = sizeof(u); 242 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 243 } 244 245 /* 246 * sysctl helper routine for uvm_pctparam. 247 */ 248 static int 249 uvm_sysctlpctparam(SYSCTLFN_ARGS) 250 { 251 int t, error; 252 struct sysctlnode node; 253 struct uvm_pctparam *pct; 254 255 pct = rnode->sysctl_data; 256 t = pct->pct_pct; 257 258 node = *rnode; 259 node.sysctl_data = &t; 260 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 261 if (error || newp == NULL) 262 return error; 263 264 if (t < 0 || t > 100) 265 return EINVAL; 266 267 error = uvm_pctparam_check(pct, t); 268 if (error) { 269 return error; 270 } 271 uvm_pctparam_set(pct, t); 272 273 return (0); 274 } 275 276 /* 277 * uvm_sysctl: sysctl hook into UVM system. 278 */ 279 SYSCTL_SETUP(sysctl_vm_setup, "sysctl vm subtree setup") 280 { 281 282 sysctl_createv(clog, 0, NULL, NULL, 283 CTLFLAG_PERMANENT, 284 CTLTYPE_NODE, "vm", NULL, 285 NULL, 0, NULL, 0, 286 CTL_VM, CTL_EOL); 287 sysctl_createv(clog, 0, NULL, NULL, 288 CTLFLAG_PERMANENT, 289 CTLTYPE_STRUCT, "vmmeter", 290 SYSCTL_DESCR("Simple system-wide virtual memory " 291 "statistics"), 292 sysctl_vm_meter, 0, NULL, sizeof(struct vmtotal), 293 CTL_VM, VM_METER, CTL_EOL); 294 sysctl_createv(clog, 0, NULL, NULL, 295 CTLFLAG_PERMANENT, 296 CTLTYPE_STRUCT, "loadavg", 297 SYSCTL_DESCR("System load average history"), 298 NULL, 0, &averunnable, sizeof(averunnable), 299 CTL_VM, VM_LOADAVG, CTL_EOL); 300 sysctl_createv(clog, 0, NULL, NULL, 301 CTLFLAG_PERMANENT, 302 CTLTYPE_STRUCT, "uvmexp", 303 SYSCTL_DESCR("Detailed system-wide virtual memory " 304 "statistics"), 305 sysctl_vm_uvmexp, 0, &uvmexp, sizeof(uvmexp), 306 CTL_VM, VM_UVMEXP, CTL_EOL); 307 sysctl_createv(clog, 0, NULL, NULL, 308 CTLFLAG_PERMANENT, 309 CTLTYPE_INT, "nkmempages", 310 SYSCTL_DESCR("Default number of pages in kmem_map"), 311 NULL, 0, &nkmempages, 0, 312 CTL_VM, VM_NKMEMPAGES, CTL_EOL); 313 sysctl_createv(clog, 0, NULL, NULL, 314 CTLFLAG_PERMANENT, 315 CTLTYPE_STRUCT, "uvmexp2", 316 SYSCTL_DESCR("Detailed system-wide virtual memory " 317 "statistics (MI)"), 318 sysctl_vm_uvmexp2, 0, NULL, 0, 319 CTL_VM, VM_UVMEXP2, CTL_EOL); 320 sysctl_createv(clog, 0, NULL, NULL, 321 CTLFLAG_PERMANENT, CTLTYPE_INT, "maxslp", 322 SYSCTL_DESCR("Maximum process sleep time before being " 323 "swapped"), 324 NULL, 0, &maxslp, 0, 325 CTL_VM, VM_MAXSLP, CTL_EOL); 326 sysctl_createv(clog, 0, NULL, NULL, 327 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 328 CTLTYPE_INT, "uspace", 329 SYSCTL_DESCR("Number of bytes allocated for a kernel " 330 "stack"), 331 NULL, USPACE, NULL, 0, 332 CTL_VM, VM_USPACE, CTL_EOL); 333 sysctl_createv(clog, 0, NULL, NULL, 334 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 335 CTLTYPE_INT, "idlezero", 336 SYSCTL_DESCR("Whether try to zero pages in idle loop"), 337 NULL, 0, &vm_page_zero_enable, 0, 338 CTL_VM, CTL_CREATE, CTL_EOL); 339 340 uvmpdpol_sysctlsetup(); 341 } 342 343 /* 344 * uvm_total: calculate the current state of the system. 345 */ 346 static void 347 uvm_total(struct vmtotal *totalp) 348 { 349 struct lwp *l; 350 #if 0 351 struct vm_map_entry * entry; 352 struct vm_map *map; 353 int paging; 354 #endif 355 int active; 356 357 memset(totalp, 0, sizeof *totalp); 358 359 /* 360 * calculate process statistics 361 */ 362 363 proclist_lock_read(); 364 LIST_FOREACH(l, &alllwp, l_list) { 365 if (l->l_proc->p_flag & P_SYSTEM) 366 continue; 367 switch (l->l_stat) { 368 case 0: 369 continue; 370 371 case LSSLEEP: 372 case LSSTOP: 373 if (l->l_flag & L_INMEM) { 374 if (l->l_priority <= PZERO) 375 totalp->t_dw++; 376 else if (l->l_slptime < maxslp) 377 totalp->t_sl++; 378 } else if (l->l_slptime < maxslp) 379 totalp->t_sw++; 380 if (l->l_slptime >= maxslp) 381 continue; 382 break; 383 384 case LSRUN: 385 case LSONPROC: 386 case LSIDL: 387 if (l->l_flag & L_INMEM) 388 totalp->t_rq++; 389 else 390 totalp->t_sw++; 391 if (l->l_stat == LSIDL) 392 continue; 393 break; 394 } 395 /* 396 * note active objects 397 */ 398 #if 0 399 /* 400 * XXXCDC: BOGUS! rethink this. in the mean time 401 * don't do it. 402 */ 403 paging = 0; 404 vm_map_lock(map); 405 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 406 entry != &map->header; entry = entry->next) { 407 if (entry->is_a_map || entry->is_sub_map || 408 entry->object.uvm_obj == NULL) 409 continue; 410 /* XXX how to do this with uvm */ 411 } 412 vm_map_unlock(map); 413 if (paging) 414 totalp->t_pw++; 415 #endif 416 } 417 proclist_unlock_read(); 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 Tue Sep 23 14:10:03 GMT 2025