1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)vmmeter.h 8.2 (Berkeley) 7/10/94 32 */ 33 34 #ifndef _SYS_VMMETER_H_ 35 #define _SYS_VMMETER_H_ 36 37 /* 38 * This value is used by ps(1) to change sleep state flag from 'S' to 39 * 'I' and by the sched process to set the alarm clock. 40 */ 41 #define MAXSLP 20 42 43 struct vmtotal { 44 uint64_t t_vm; /* total virtual memory */ 45 uint64_t t_avm; /* active virtual memory */ 46 uint64_t t_rm; /* total real memory in use */ 47 uint64_t t_arm; /* active real memory */ 48 uint64_t t_vmshr; /* shared virtual memory */ 49 uint64_t t_avmshr; /* active shared virtual memory */ 50 uint64_t t_rmshr; /* shared real memory */ 51 uint64_t t_armshr; /* active shared real memory */ 52 uint64_t t_free; /* free memory pages */ 53 int16_t t_rq; /* length of the run queue */ 54 int16_t t_dw; /* threads in ``disk wait'' (neg 55 priority) */ 56 int16_t t_pw; /* threads in page wait */ 57 int16_t t_sl; /* threads sleeping in core */ 58 int16_t t_sw; /* swapped out runnable/short 59 block threads */ 60 uint16_t t_pad[3]; 61 }; 62 63 #if defined(_KERNEL) || defined(_WANT_VMMETER) 64 #include <sys/counter.h> 65 66 #ifdef _KERNEL 67 #define VMMETER_ALIGNED __aligned(CACHE_LINE_SIZE) 68 #else 69 #define VMMETER_ALIGNED 70 #endif 71 72 /* 73 * System wide statistics counters. 74 * Locking: 75 * c - constant after initialization 76 * p - uses counter(9) 77 */ 78 struct vmmeter { 79 /* 80 * General system activity. 81 */ 82 counter_u64_t v_swtch; /* (p) context switches */ 83 counter_u64_t v_trap; /* (p) calls to trap */ 84 counter_u64_t v_syscall; /* (p) calls to syscall() */ 85 counter_u64_t v_intr; /* (p) device interrupts */ 86 counter_u64_t v_soft; /* (p) software interrupts */ 87 /* 88 * Virtual memory activity. 89 */ 90 counter_u64_t v_vm_faults; /* (p) address memory faults */ 91 counter_u64_t v_io_faults; /* (p) page faults requiring I/O */ 92 counter_u64_t v_cow_faults; /* (p) copy-on-writes faults */ 93 counter_u64_t v_cow_optim; /* (p) optimized COW faults */ 94 counter_u64_t v_zfod; /* (p) pages zero filled on demand */ 95 counter_u64_t v_ozfod; /* (p) optimized zero fill pages */ 96 counter_u64_t v_swapin; /* (p) swap pager pageins */ 97 counter_u64_t v_swapout; /* (p) swap pager pageouts */ 98 counter_u64_t v_swappgsin; /* (p) swap pager pages paged in */ 99 counter_u64_t v_swappgsout; /* (p) swap pager pages paged out */ 100 counter_u64_t v_vnodein; /* (p) vnode pager pageins */ 101 counter_u64_t v_vnodeout; /* (p) vnode pager pageouts */ 102 counter_u64_t v_vnodepgsin; /* (p) vnode_pager pages paged in */ 103 counter_u64_t v_vnodepgsout; /* (p) vnode pager pages paged out */ 104 counter_u64_t v_intrans; /* (p) intransit blocking page faults */ 105 counter_u64_t v_reactivated; /* (p) reactivated by the pagedaemon */ 106 counter_u64_t v_pdwakeups; /* (p) times daemon has awaken */ 107 counter_u64_t v_pdpages; /* (p) pages analyzed by daemon */ 108 counter_u64_t v_pdshortfalls; /* (p) page reclamation shortfalls */ 109 110 counter_u64_t v_dfree; /* (p) pages freed by daemon */ 111 counter_u64_t v_pfree; /* (p) pages freed by processes */ 112 counter_u64_t v_tfree; /* (p) total pages freed */ 113 /* 114 * Fork/vfork/rfork activity. 115 */ 116 counter_u64_t v_forks; /* (p) fork() calls */ 117 counter_u64_t v_vforks; /* (p) vfork() calls */ 118 counter_u64_t v_rforks; /* (p) rfork() calls */ 119 counter_u64_t v_kthreads; /* (p) fork() calls by kernel */ 120 counter_u64_t v_forkpages; /* (p) pages affected by fork() */ 121 counter_u64_t v_vforkpages; /* (p) pages affected by vfork() */ 122 counter_u64_t v_rforkpages; /* (p) pages affected by rfork() */ 123 counter_u64_t v_kthreadpages; /* (p) ... and by kernel fork() */ 124 counter_u64_t v_wire_count; /* (p) pages wired down */ 125 #define VM_METER_NCOUNTERS \ 126 (offsetof(struct vmmeter, v_page_size) / sizeof(counter_u64_t)) 127 /* 128 * Distribution of page usages. 129 */ 130 u_int v_page_size; /* (c) page size in bytes */ 131 u_int v_page_count; /* (c) total number of pages in system */ 132 u_int v_free_reserved; /* (c) pages reserved for deadlock */ 133 u_int v_free_target; /* (c) pages desired free */ 134 u_int v_free_min; /* (c) pages desired free */ 135 u_int v_inactive_target; /* (c) pages desired inactive */ 136 u_int v_pageout_free_min; /* (c) min pages reserved for kernel */ 137 u_int v_interrupt_free_min; /* (c) reserved pages for int code */ 138 u_int v_free_severe; /* (c) severe page depletion point */ 139 }; 140 #endif /* _KERNEL || _WANT_VMMETER */ 141 142 #ifdef _KERNEL 143 144 #include <sys/domainset.h> 145 146 extern struct vmmeter vm_cnt; 147 extern domainset_t all_domains; 148 extern domainset_t vm_min_domains; 149 extern domainset_t vm_severe_domains; 150 151 #define VM_CNT_ADD(var, x) counter_u64_add(vm_cnt.var, x) 152 #define VM_CNT_INC(var) VM_CNT_ADD(var, 1) 153 #define VM_CNT_FETCH(var) counter_u64_fetch(vm_cnt.var) 154 155 extern u_long vm_user_wire_count; 156 157 static inline void 158 vm_wire_add(int cnt) 159 { 160 161 VM_CNT_ADD(v_wire_count, cnt); 162 } 163 164 static inline void 165 vm_wire_sub(int cnt) 166 { 167 168 VM_CNT_ADD(v_wire_count, -cnt); 169 } 170 171 u_int vm_free_count(void); 172 static inline u_int 173 vm_wire_count(void) 174 { 175 176 return (VM_CNT_FETCH(v_wire_count)); 177 } 178 179 /* 180 * Return TRUE if we are under our severe low-free-pages threshold 181 * 182 * These routines are typically used at the user<->system interface to determine 183 * whether we need to block in order to avoid a low memory deadlock. 184 */ 185 static inline int 186 vm_page_count_severe(void) 187 { 188 189 return (!DOMAINSET_EMPTY(&vm_severe_domains)); 190 } 191 192 static inline int 193 vm_page_count_severe_domain(int domain) 194 { 195 196 return (DOMAINSET_ISSET(domain, &vm_severe_domains)); 197 } 198 199 static inline int 200 vm_page_count_severe_set(const domainset_t *mask) 201 { 202 203 return (DOMAINSET_SUBSET(&vm_severe_domains, mask)); 204 } 205 206 /* 207 * Return TRUE if we are under our minimum low-free-pages threshold. 208 * 209 * These routines are typically used within the system to determine whether 210 * we can execute potentially very expensive code in terms of memory. It 211 * is also used by the pageout daemon to calculate when to sleep, when 212 * to wake waiters up, and when (after making a pass) to become more 213 * desperate. 214 */ 215 static inline int 216 vm_page_count_min(void) 217 { 218 219 return (!DOMAINSET_EMPTY(&vm_min_domains)); 220 } 221 222 static inline int 223 vm_page_count_min_domain(int domain) 224 { 225 226 return (DOMAINSET_ISSET(domain, &vm_min_domains)); 227 } 228 229 static inline int 230 vm_page_count_min_set(const domainset_t *mask) 231 { 232 233 return (DOMAINSET_SUBSET(&vm_min_domains, mask)); 234 } 235 236 #endif /* _KERNEL */ 237 #endif /* _SYS_VMMETER_H_ */ 238