1 /* $NetBSD: uvm_meter.c,v 1.52 2010/04/16 03:21:49 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 1.52 2010/04/16 03:21:49 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 static void uvm_total(struct vmtotal *); 63 64 /* 65 * sysctl helper routine for the vm.vmmeter node. 66 */ 67 static int 68 sysctl_vm_meter(SYSCTLFN_ARGS) 69 { 70 struct sysctlnode node; 71 struct vmtotal vmtotals; 72 73 node = *rnode; 74 node.sysctl_data = &vmtotals; 75 uvm_total(&vmtotals); 76 77 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 78 } 79 80 /* 81 * sysctl helper routine for the vm.uvmexp node. 82 */ 83 static int 84 sysctl_vm_uvmexp(SYSCTLFN_ARGS) 85 { 86 struct sysctlnode node; 87 88 node = *rnode; 89 if (oldp) 90 node.sysctl_size = min(*oldlenp, node.sysctl_size); 91 92 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 93 } 94 95 static int 96 sysctl_vm_uvmexp2(SYSCTLFN_ARGS) 97 { 98 struct sysctlnode node; 99 struct uvmexp_sysctl u; 100 int active, inactive; 101 102 uvm_estimatepageable(&active, &inactive); 103 104 memset(&u, 0, sizeof(u)); 105 106 /* Entries here are in order of uvmexp_sysctl, not uvmexp */ 107 u.pagesize = uvmexp.pagesize; 108 u.pagemask = uvmexp.pagemask; 109 u.pageshift = uvmexp.pageshift; 110 u.npages = uvmexp.npages; 111 u.free = uvmexp.free; 112 u.active = active; 113 u.inactive = inactive; 114 u.paging = uvmexp.paging; 115 u.wired = uvmexp.wired; 116 u.zeropages = uvmexp.zeropages; 117 u.reserve_pagedaemon = uvmexp.reserve_pagedaemon; 118 u.reserve_kernel = uvmexp.reserve_kernel; 119 u.freemin = uvmexp.freemin; 120 u.freetarg = uvmexp.freetarg; 121 u.inactarg = 0; /* unused */ 122 u.wiredmax = uvmexp.wiredmax; 123 u.nswapdev = uvmexp.nswapdev; 124 u.swpages = uvmexp.swpages; 125 u.swpginuse = uvmexp.swpginuse; 126 u.swpgonly = uvmexp.swpgonly; 127 u.nswget = uvmexp.nswget; 128 u.faults = uvmexp.faults; 129 u.traps = uvmexp.traps; 130 u.intrs = uvmexp.intrs; 131 u.swtch = uvmexp.swtch; 132 u.softs = uvmexp.softs; 133 u.syscalls = uvmexp.syscalls; 134 u.pageins = uvmexp.pageins; 135 u.pgswapin = uvmexp.pgswapin; 136 u.pgswapout = uvmexp.pgswapout; 137 u.forks = uvmexp.forks; 138 u.forks_ppwait = uvmexp.forks_ppwait; 139 u.forks_sharevm = uvmexp.forks_sharevm; 140 u.pga_zerohit = uvmexp.pga_zerohit; 141 u.pga_zeromiss = uvmexp.pga_zeromiss; 142 u.zeroaborts = uvmexp.zeroaborts; 143 u.fltnoram = uvmexp.fltnoram; 144 u.fltnoanon = uvmexp.fltnoanon; 145 u.fltpgwait = uvmexp.fltpgwait; 146 u.fltpgrele = uvmexp.fltpgrele; 147 u.fltrelck = uvmexp.fltrelck; 148 u.fltrelckok = uvmexp.fltrelckok; 149 u.fltanget = uvmexp.fltanget; 150 u.fltanretry = uvmexp.fltanretry; 151 u.fltamcopy = uvmexp.fltamcopy; 152 u.fltnamap = uvmexp.fltnamap; 153 u.fltnomap = uvmexp.fltnomap; 154 u.fltlget = uvmexp.fltlget; 155 u.fltget = uvmexp.fltget; 156 u.flt_anon = uvmexp.flt_anon; 157 u.flt_acow = uvmexp.flt_acow; 158 u.flt_obj = uvmexp.flt_obj; 159 u.flt_prcopy = uvmexp.flt_prcopy; 160 u.flt_przero = uvmexp.flt_przero; 161 u.pdwoke = uvmexp.pdwoke; 162 u.pdrevs = uvmexp.pdrevs; 163 u.pdfreed = uvmexp.pdfreed; 164 u.pdscans = uvmexp.pdscans; 165 u.pdanscan = uvmexp.pdanscan; 166 u.pdobscan = uvmexp.pdobscan; 167 u.pdreact = uvmexp.pdreact; 168 u.pdbusy = uvmexp.pdbusy; 169 u.pdpageouts = uvmexp.pdpageouts; 170 u.pdpending = uvmexp.pdpending; 171 u.pddeact = uvmexp.pddeact; 172 u.anonpages = uvmexp.anonpages; 173 u.filepages = uvmexp.filepages; 174 u.execpages = uvmexp.execpages; 175 u.colorhit = uvmexp.colorhit; 176 u.colormiss = uvmexp.colormiss; 177 u.cpuhit = uvmexp.cpuhit; 178 u.cpumiss = uvmexp.cpumiss; 179 180 node = *rnode; 181 node.sysctl_data = &u; 182 node.sysctl_size = sizeof(u); 183 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 184 } 185 186 /* 187 * sysctl helper routine for uvm_pctparam. 188 */ 189 static int 190 uvm_sysctlpctparam(SYSCTLFN_ARGS) 191 { 192 int t, error; 193 struct sysctlnode node; 194 struct uvm_pctparam *pct; 195 196 pct = rnode->sysctl_data; 197 t = pct->pct_pct; 198 199 node = *rnode; 200 node.sysctl_data = &t; 201 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 202 if (error || newp == NULL) 203 return error; 204 205 if (t < 0 || t > 100) 206 return EINVAL; 207 208 error = uvm_pctparam_check(pct, t); 209 if (error) { 210 return error; 211 } 212 uvm_pctparam_set(pct, t); 213 214 return (0); 215 } 216 217 /* 218 * uvm_sysctl: sysctl hook into UVM system. 219 */ 220 SYSCTL_SETUP(sysctl_vm_setup, "sysctl vm subtree setup") 221 { 222 223 sysctl_createv(clog, 0, NULL, NULL, 224 CTLFLAG_PERMANENT, 225 CTLTYPE_NODE, "vm", NULL, 226 NULL, 0, NULL, 0, 227 CTL_VM, CTL_EOL); 228 sysctl_createv(clog, 0, NULL, NULL, 229 CTLFLAG_PERMANENT, 230 CTLTYPE_STRUCT, "vmmeter", 231 SYSCTL_DESCR("Simple system-wide virtual memory " 232 "statistics"), 233 sysctl_vm_meter, 0, NULL, sizeof(struct vmtotal), 234 CTL_VM, VM_METER, CTL_EOL); 235 sysctl_createv(clog, 0, NULL, NULL, 236 CTLFLAG_PERMANENT, 237 CTLTYPE_STRUCT, "loadavg", 238 SYSCTL_DESCR("System load average history"), 239 NULL, 0, &averunnable, sizeof(averunnable), 240 CTL_VM, VM_LOADAVG, CTL_EOL); 241 sysctl_createv(clog, 0, NULL, NULL, 242 CTLFLAG_PERMANENT, 243 CTLTYPE_STRUCT, "uvmexp", 244 SYSCTL_DESCR("Detailed system-wide virtual memory " 245 "statistics"), 246 sysctl_vm_uvmexp, 0, &uvmexp, sizeof(uvmexp), 247 CTL_VM, VM_UVMEXP, CTL_EOL); 248 sysctl_createv(clog, 0, NULL, NULL, 249 CTLFLAG_PERMANENT, 250 CTLTYPE_INT, "nkmempages", 251 SYSCTL_DESCR("Default number of pages in kmem_map"), 252 NULL, 0, &nkmempages, 0, 253 CTL_VM, VM_NKMEMPAGES, CTL_EOL); 254 sysctl_createv(clog, 0, NULL, NULL, 255 CTLFLAG_PERMANENT, 256 CTLTYPE_STRUCT, "uvmexp2", 257 SYSCTL_DESCR("Detailed system-wide virtual memory " 258 "statistics (MI)"), 259 sysctl_vm_uvmexp2, 0, NULL, 0, 260 CTL_VM, VM_UVMEXP2, CTL_EOL); 261 sysctl_createv(clog, 0, NULL, NULL, 262 CTLFLAG_PERMANENT, CTLTYPE_INT, "maxslp", 263 SYSCTL_DESCR("Maximum process sleep time before being " 264 "swapped"), 265 NULL, 0, &maxslp, 0, 266 CTL_VM, VM_MAXSLP, CTL_EOL); 267 sysctl_createv(clog, 0, NULL, NULL, 268 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 269 CTLTYPE_INT, "uspace", 270 SYSCTL_DESCR("Number of bytes allocated for a kernel " 271 "stack"), 272 NULL, USPACE, NULL, 0, 273 CTL_VM, VM_USPACE, CTL_EOL); 274 sysctl_createv(clog, 0, NULL, NULL, 275 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 276 CTLTYPE_BOOL, "idlezero", 277 SYSCTL_DESCR("Whether try to zero pages in idle loop"), 278 NULL, 0, &vm_page_zero_enable, 0, 279 CTL_VM, CTL_CREATE, CTL_EOL); 280 281 uvmpdpol_sysctlsetup(); 282 } 283 284 /* 285 * uvm_total: calculate the current state of the system. 286 */ 287 static void 288 uvm_total(struct vmtotal *totalp) 289 { 290 struct lwp *l; 291 #if 0 292 struct vm_map_entry * entry; 293 struct vm_map *map; 294 int paging; 295 #endif 296 int active; 297 298 memset(totalp, 0, sizeof *totalp); 299 300 /* 301 * calculate process statistics 302 */ 303 mutex_enter(proc_lock); 304 LIST_FOREACH(l, &alllwp, l_list) { 305 if (l->l_proc->p_flag & PK_SYSTEM) 306 continue; 307 switch (l->l_stat) { 308 case 0: 309 continue; 310 311 case LSSLEEP: 312 case LSSTOP: 313 if (lwp_eprio(l) <= PZERO) { 314 totalp->t_dw++; 315 } else if (l->l_slptime < maxslp) { 316 totalp->t_sl++; 317 } 318 if (l->l_slptime >= maxslp) 319 continue; 320 break; 321 322 case LSRUN: 323 case LSONPROC: 324 case LSIDL: 325 totalp->t_rq++; 326 if (l->l_stat == LSIDL) 327 continue; 328 break; 329 } 330 /* 331 * note active objects 332 */ 333 #if 0 334 /* 335 * XXXCDC: BOGUS! rethink this. in the mean time 336 * don't do it. 337 */ 338 paging = 0; 339 vm_map_lock(map); 340 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 341 entry != &map->header; entry = entry->next) { 342 if (entry->is_a_map || entry->is_sub_map || 343 entry->object.uvm_obj == NULL) 344 continue; 345 /* XXX how to do this with uvm */ 346 } 347 vm_map_unlock(map); 348 if (paging) 349 totalp->t_pw++; 350 #endif 351 } 352 mutex_exit(proc_lock); 353 354 /* 355 * Calculate object memory usage statistics. 356 */ 357 uvm_estimatepageable(&active, NULL); 358 totalp->t_free = uvmexp.free; 359 totalp->t_vm = uvmexp.npages - uvmexp.free + uvmexp.swpginuse; 360 totalp->t_avm = active + uvmexp.swpginuse; /* XXX */ 361 totalp->t_rm = uvmexp.npages - uvmexp.free; 362 totalp->t_arm = active; 363 totalp->t_vmshr = 0; /* XXX */ 364 totalp->t_avmshr = 0; /* XXX */ 365 totalp->t_rmshr = 0; /* XXX */ 366 totalp->t_armshr = 0; /* XXX */ 367 } 368 369 void 370 uvm_pctparam_set(struct uvm_pctparam *pct, int val) 371 { 372 373 pct->pct_pct = val; 374 pct->pct_scaled = val * UVM_PCTPARAM_SCALE / 100; 375 } 376 377 int 378 uvm_pctparam_get(struct uvm_pctparam *pct) 379 { 380 381 return pct->pct_pct; 382 } 383 384 int 385 uvm_pctparam_check(struct uvm_pctparam *pct, int val) 386 { 387 388 if (pct->pct_check == NULL) { 389 return 0; 390 } 391 return (*pct->pct_check)(pct, val); 392 } 393 394 void 395 uvm_pctparam_init(struct uvm_pctparam *pct, int val, 396 int (*fn)(struct uvm_pctparam *, int)) 397 { 398 399 pct->pct_check = fn; 400 uvm_pctparam_set(pct, val); 401 } 402 403 int 404 uvm_pctparam_createsysctlnode(struct uvm_pctparam *pct, const char *name, 405 const char *desc) 406 { 407 408 return sysctl_createv(NULL, 0, NULL, NULL, 409 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 410 CTLTYPE_INT, name, SYSCTL_DESCR(desc), 411 uvm_sysctlpctparam, 0, pct, 0, CTL_VM, CTL_CREATE, CTL_EOL); 412 } 413