1 /* $NetBSD: uvm_meter.c,v 1.69 2019/01/07 22:48:01 jdolecek 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 35 * from: Id: uvm_meter.c,v 1.1.2.1 1997/08/14 19:10:35 chuck Exp 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: uvm_meter.c,v 1.69 2019/01/07 22:48:01 jdolecek Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/cpu.h> 44 #include <sys/proc.h> 45 #include <sys/kernel.h> 46 #include <sys/sysctl.h> 47 48 #include <uvm/uvm.h> 49 #include <uvm/uvm_pdpolicy.h> 50 51 /* 52 * maxslp: ???? XXXCDC 53 */ 54 55 int maxslp = MAXSLP; /* patchable ... */ 56 struct loadavg averunnable; 57 58 static void uvm_total(struct vmtotal *); 59 60 /* 61 * sysctl helper routine for the vm.vmmeter node. 62 */ 63 static int 64 sysctl_vm_meter(SYSCTLFN_ARGS) 65 { 66 struct sysctlnode node; 67 struct vmtotal vmtotals; 68 69 node = *rnode; 70 node.sysctl_data = &vmtotals; 71 uvm_total(&vmtotals); 72 73 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 74 } 75 76 /* 77 * sysctl helper routine for the vm.uvmexp node. 78 */ 79 static int 80 sysctl_vm_uvmexp(SYSCTLFN_ARGS) 81 { 82 struct sysctlnode node; 83 84 node = *rnode; 85 if (oldlenp) 86 node.sysctl_size = uimin(*oldlenp, node.sysctl_size); 87 88 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 89 } 90 91 static int 92 sysctl_vm_uvmexp2(SYSCTLFN_ARGS) 93 { 94 struct sysctlnode node; 95 struct uvmexp_sysctl u; 96 int active, inactive; 97 CPU_INFO_ITERATOR cii; 98 struct cpu_info *ci; 99 100 uvm_estimatepageable(&active, &inactive); 101 102 memset(&u, 0, sizeof(u)); 103 104 /* Entries here are in order of uvmexp_sysctl, not uvmexp */ 105 u.pagesize = uvmexp.pagesize; 106 u.pagemask = uvmexp.pagemask; 107 u.pageshift = uvmexp.pageshift; 108 u.npages = uvmexp.npages; 109 u.free = uvmexp.free; 110 u.active = active; 111 u.inactive = inactive; 112 u.paging = uvmexp.paging; 113 u.wired = uvmexp.wired; 114 u.zeropages = uvmexp.zeropages; 115 u.reserve_pagedaemon = uvmexp.reserve_pagedaemon; 116 u.reserve_kernel = uvmexp.reserve_kernel; 117 u.freemin = uvmexp.freemin; 118 u.freetarg = uvmexp.freetarg; 119 u.inactarg = 0; /* unused */ 120 u.wiredmax = uvmexp.wiredmax; 121 u.nswapdev = uvmexp.nswapdev; 122 u.swpages = uvmexp.swpages; 123 u.swpginuse = uvmexp.swpginuse; 124 u.swpgonly = uvmexp.swpgonly; 125 u.nswget = uvmexp.nswget; 126 u.cpuhit = uvmexp.cpuhit; 127 u.cpumiss = uvmexp.cpumiss; 128 for (CPU_INFO_FOREACH(cii, ci)) { 129 u.faults += ci->ci_data.cpu_nfault; 130 u.traps += ci->ci_data.cpu_ntrap; 131 u.intrs += ci->ci_data.cpu_nintr; 132 u.swtch += ci->ci_data.cpu_nswtch; 133 u.softs += ci->ci_data.cpu_nsoft; 134 u.syscalls += ci->ci_data.cpu_nsyscall; 135 } 136 u.pageins = uvmexp.pageins; 137 u.pgswapin = uvmexp.pgswapin; 138 u.pgswapout = uvmexp.pgswapout; 139 u.forks = uvmexp.forks; 140 u.forks_ppwait = uvmexp.forks_ppwait; 141 u.forks_sharevm = uvmexp.forks_sharevm; 142 u.pga_zerohit = uvmexp.pga_zerohit; 143 u.pga_zeromiss = uvmexp.pga_zeromiss; 144 u.zeroaborts = uvmexp.zeroaborts; 145 u.fltnoram = uvmexp.fltnoram; 146 u.fltnoanon = uvmexp.fltnoanon; 147 u.fltpgwait = uvmexp.fltpgwait; 148 u.fltpgrele = uvmexp.fltpgrele; 149 u.fltrelck = uvmexp.fltrelck; 150 u.fltrelckok = uvmexp.fltrelckok; 151 u.fltanget = uvmexp.fltanget; 152 u.fltanretry = uvmexp.fltanretry; 153 u.fltamcopy = uvmexp.fltamcopy; 154 u.fltnamap = uvmexp.fltnamap; 155 u.fltnomap = uvmexp.fltnomap; 156 u.fltlget = uvmexp.fltlget; 157 u.fltget = uvmexp.fltget; 158 u.flt_anon = uvmexp.flt_anon; 159 u.flt_acow = uvmexp.flt_acow; 160 u.flt_obj = uvmexp.flt_obj; 161 u.flt_prcopy = uvmexp.flt_prcopy; 162 u.flt_przero = uvmexp.flt_przero; 163 u.pdwoke = uvmexp.pdwoke; 164 u.pdrevs = uvmexp.pdrevs; 165 u.pdfreed = uvmexp.pdfreed; 166 u.pdscans = uvmexp.pdscans; 167 u.pdanscan = uvmexp.pdanscan; 168 u.pdobscan = uvmexp.pdobscan; 169 u.pdreact = uvmexp.pdreact; 170 u.pdbusy = uvmexp.pdbusy; 171 u.pdpageouts = uvmexp.pdpageouts; 172 u.pdpending = uvmexp.pdpending; 173 u.pddeact = uvmexp.pddeact; 174 u.anonpages = uvmexp.anonpages; 175 u.filepages = uvmexp.filepages; 176 u.execpages = uvmexp.execpages; 177 u.colorhit = uvmexp.colorhit; 178 u.colormiss = uvmexp.colormiss; 179 u.ncolors = uvmexp.ncolors; 180 u.bootpages = uvmexp.bootpages; 181 u.poolpages = pool_totalpages(); 182 183 node = *rnode; 184 node.sysctl_data = &u; 185 node.sysctl_size = sizeof(u); 186 if (oldlenp) 187 node.sysctl_size = uimin(*oldlenp, node.sysctl_size); 188 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 189 } 190 191 /* 192 * sysctl helper routine for uvm_pctparam. 193 */ 194 static int 195 uvm_sysctlpctparam(SYSCTLFN_ARGS) 196 { 197 int t, error; 198 struct sysctlnode node; 199 struct uvm_pctparam *pct; 200 201 pct = rnode->sysctl_data; 202 t = pct->pct_pct; 203 204 node = *rnode; 205 node.sysctl_data = &t; 206 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 207 if (error || newp == NULL) 208 return error; 209 210 if (t < 0 || t > 100) 211 return EINVAL; 212 213 error = uvm_pctparam_check(pct, t); 214 if (error) { 215 return error; 216 } 217 uvm_pctparam_set(pct, t); 218 219 return (0); 220 } 221 222 /* 223 * uvm_sysctl: sysctl hook into UVM system. 224 */ 225 SYSCTL_SETUP(sysctl_vm_setup, "sysctl vm subtree setup") 226 { 227 228 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_STRUCT, "uvmexp2", 251 SYSCTL_DESCR("Detailed system-wide virtual memory " 252 "statistics (MI)"), 253 sysctl_vm_uvmexp2, 0, NULL, 0, 254 CTL_VM, VM_UVMEXP2, CTL_EOL); 255 sysctl_createv(clog, 0, NULL, NULL, 256 CTLFLAG_PERMANENT, CTLTYPE_INT, "maxslp", 257 SYSCTL_DESCR("Maximum process sleep time before being " 258 "swapped"), 259 NULL, 0, &maxslp, 0, 260 CTL_VM, VM_MAXSLP, CTL_EOL); 261 sysctl_createv(clog, 0, NULL, NULL, 262 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 263 CTLTYPE_INT, "uspace", 264 SYSCTL_DESCR("Number of bytes allocated for a kernel " 265 "stack"), 266 NULL, USPACE, NULL, 0, 267 CTL_VM, VM_USPACE, CTL_EOL); 268 sysctl_createv(clog, 0, NULL, NULL, 269 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 270 CTLTYPE_BOOL, "idlezero", 271 SYSCTL_DESCR("Whether try to zero pages in idle loop"), 272 NULL, 0, &vm_page_zero_enable, 0, 273 CTL_VM, CTL_CREATE, CTL_EOL); 274 sysctl_createv(clog, 0, NULL, NULL, 275 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 276 CTLTYPE_LONG, "minaddress", 277 SYSCTL_DESCR("Minimum user address"), 278 NULL, VM_MIN_ADDRESS, NULL, 0, 279 CTL_VM, VM_MINADDRESS, CTL_EOL); 280 sysctl_createv(clog, 0, NULL, NULL, 281 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 282 CTLTYPE_LONG, "maxaddress", 283 SYSCTL_DESCR("Maximum user address"), 284 NULL, VM_MAX_ADDRESS, NULL, 0, 285 CTL_VM, VM_MAXADDRESS, CTL_EOL); 286 sysctl_createv(clog, 0, NULL, NULL, 287 CTLFLAG_PERMANENT|CTLFLAG_UNSIGNED, 288 CTLTYPE_INT, "guard_size", 289 SYSCTL_DESCR("Guard size of main thread"), 290 NULL, 0, &user_stack_guard_size, 0, 291 CTL_VM, VM_GUARD_SIZE, CTL_EOL); 292 sysctl_createv(clog, 0, NULL, NULL, 293 CTLFLAG_PERMANENT|CTLFLAG_UNSIGNED|CTLFLAG_READWRITE, 294 CTLTYPE_INT, "thread_guard_size", 295 SYSCTL_DESCR("Guard size of other threads"), 296 NULL, 0, &user_thread_stack_guard_size, 0, 297 CTL_VM, VM_THREAD_GUARD_SIZE, CTL_EOL); 298 #ifdef PMAP_DIRECT 299 sysctl_createv(clog, 0, NULL, NULL, 300 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 301 CTLTYPE_BOOL, "ubc_direct", 302 SYSCTL_DESCR("Use direct map for UBC I/O"), 303 NULL, 0, &ubc_direct, 0, 304 CTL_VM, CTL_CREATE, CTL_EOL); 305 #endif 306 307 uvmpdpol_sysctlsetup(); 308 } 309 310 /* 311 * uvm_total: calculate the current state of the system. 312 */ 313 static void 314 uvm_total(struct vmtotal *totalp) 315 { 316 struct lwp *l; 317 #if 0 318 struct vm_map_entry * entry; 319 struct vm_map *map; 320 int paging; 321 #endif 322 int active; 323 324 memset(totalp, 0, sizeof *totalp); 325 326 /* 327 * calculate process statistics 328 */ 329 mutex_enter(proc_lock); 330 LIST_FOREACH(l, &alllwp, l_list) { 331 if (l->l_proc->p_flag & PK_SYSTEM) 332 continue; 333 switch (l->l_stat) { 334 case 0: 335 continue; 336 337 case LSSLEEP: 338 case LSSTOP: 339 if ((l->l_flag & LW_SINTR) == 0) { 340 totalp->t_dw++; 341 } else if (l->l_slptime < maxslp) { 342 totalp->t_sl++; 343 } 344 if (l->l_slptime >= maxslp) 345 continue; 346 break; 347 348 case LSRUN: 349 case LSONPROC: 350 case LSIDL: 351 totalp->t_rq++; 352 if (l->l_stat == LSIDL) 353 continue; 354 break; 355 } 356 /* 357 * note active objects 358 */ 359 #if 0 360 /* 361 * XXXCDC: BOGUS! rethink this. in the mean time 362 * don't do it. 363 */ 364 paging = 0; 365 vm_map_lock(map); 366 for (map = &p->p_vmspace->vm_map, entry = map->header.next; 367 entry != &map->header; entry = entry->next) { 368 if (entry->is_a_map || entry->is_sub_map || 369 entry->object.uvm_obj == NULL) 370 continue; 371 /* XXX how to do this with uvm */ 372 } 373 vm_map_unlock(map); 374 if (paging) 375 totalp->t_pw++; 376 #endif 377 } 378 mutex_exit(proc_lock); 379 380 /* 381 * Calculate object memory usage statistics. 382 */ 383 uvm_estimatepageable(&active, NULL); 384 totalp->t_free = uvmexp.free; 385 totalp->t_vm = uvmexp.npages - uvmexp.free + uvmexp.swpginuse; 386 totalp->t_avm = active + uvmexp.swpginuse; /* XXX */ 387 totalp->t_rm = uvmexp.npages - uvmexp.free; 388 totalp->t_arm = active; 389 totalp->t_vmshr = 0; /* XXX */ 390 totalp->t_avmshr = 0; /* XXX */ 391 totalp->t_rmshr = 0; /* XXX */ 392 totalp->t_armshr = 0; /* XXX */ 393 } 394 395 void 396 uvm_pctparam_set(struct uvm_pctparam *pct, int val) 397 { 398 399 pct->pct_pct = val; 400 pct->pct_scaled = val * UVM_PCTPARAM_SCALE / 100; 401 } 402 403 int 404 uvm_pctparam_get(struct uvm_pctparam *pct) 405 { 406 407 return pct->pct_pct; 408 } 409 410 int 411 uvm_pctparam_check(struct uvm_pctparam *pct, int val) 412 { 413 414 if (pct->pct_check == NULL) { 415 return 0; 416 } 417 return (*pct->pct_check)(pct, val); 418 } 419 420 void 421 uvm_pctparam_init(struct uvm_pctparam *pct, int val, 422 int (*fn)(struct uvm_pctparam *, int)) 423 { 424 425 pct->pct_check = fn; 426 uvm_pctparam_set(pct, val); 427 } 428 429 int 430 uvm_pctparam_createsysctlnode(struct uvm_pctparam *pct, const char *name, 431 const char *desc) 432 { 433 434 return sysctl_createv(NULL, 0, NULL, NULL, 435 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 436 CTLTYPE_INT, name, SYSCTL_DESCR(desc), 437 uvm_sysctlpctparam, 0, (void *)pct, 0, CTL_VM, CTL_CREATE, CTL_EOL); 438 } 439