/* $OpenBSD: uvmexp.h,v 1.27 2026/03/08 17:06:10 deraadt Exp $ */ #ifndef _UVM_UVMEXP_ #define _UVM_UVMEXP_ /* * CTL_VM identifiers */ #define VM_METER 1 /* struct vmmeter */ #define VM_LOADAVG 2 /* struct loadavg */ #define VM_PSSTRINGS 3 /* PSSTRINGS */ #define VM_UVMEXP 4 /* struct uvmexp */ #define VM_SWAPENCRYPT 5 /* int */ #define VM_NKMEMPAGES 6 /* int - # kmem_map pages */ #define VM_ANONMIN 7 #define VM_VTEXTMIN 8 #define VM_VNODEMIN 9 #define VM_MAXSLP 10 #define VM_USPACE 11 #define VM_MALLOC_CONF 12 /* config for userland malloc */ #define VM_MAXID 13 /* number of valid vm ids */ #define CTL_VM_NAMES { \ { 0, 0 }, \ { "vmmeter", CTLTYPE_STRUCT }, \ { "loadavg", CTLTYPE_STRUCT }, \ { "psstrings", CTLTYPE_STRUCT }, \ { "uvmexp", CTLTYPE_STRUCT }, \ { "swapencrypt", CTLTYPE_NODE }, \ { "nkmempages", CTLTYPE_INT }, \ { "anonmin", CTLTYPE_INT }, \ { "vtextmin", CTLTYPE_INT }, \ { "vnodemin", CTLTYPE_INT }, \ { "maxslp", CTLTYPE_INT }, \ { "uspace", CTLTYPE_INT }, \ { "malloc_conf", CTLTYPE_STRING }, \ } /* * uvmexp: global data structures that are exported to parts of the kernel * other than the vm system. * * Locks used to protect struct members in this file: * a atomic operations (signed int, so use atomic_load_sint) * I immutable after creation * K kernel lock * F uvm_lock_fpageq * L uvm_lock_pageq * S uvm_swap_data_lock * p copy of per-CPU counters, used only by userland. * o updated only by the page daemon */ struct uvmexp { /* vm_page constants */ int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ int pagemask; /* page mask */ int pageshift; /* page shift */ /* vm_page counters */ int npages; /* [I] number of pages we manage */ int free; /* [aF] number of free pages */ int active; /* [aL] # of active pages */ int inactive; /* [aL] # of pages that we free'd but may want back */ int paging; /* [a] # number of pages in the process of being paged out */ int wired; /* [a] # number of wired pages */ int zeropages; /* [aF] number of zero'd pages */ int reserve_pagedaemon; /* [I] # of pages reserved for pagedaemon */ int reserve_kernel; /* [I] # of pages reserved for kernel */ int percpucaches; /* [a] # of pages in per-CPU caches */ int vnodepages; /* XXX # of pages used by vnode page cache */ int vtextpages; /* XXX # of pages used by vtext vnodes */ /* pageout params */ int freemin; /* [I] min number of free pages */ int freetarg; /* [I] target number of free pages */ int inactarg; /* target number of inactive pages */ int wiredmax; /* [I] max number of wired pages */ int anonmin; /* min threshold for anon pages */ int vtextmin; /* min threshold for vtext pages */ int vnodemin; /* min threshold for vnode pages */ int anonminpct; /* min percent anon pages */ int vtextminpct;/* min percent vtext pages */ int vnodeminpct;/* min percent vnode pages */ /* swap */ int nswapdev; /* [aS] number of configured swap devices in system */ int swpages; /* [aS] number of PAGE_SIZE'ed swap pages */ int swpginuse; /* [aS] number of swap pages in use */ int swpgonly; /* [a] number of swap pages in use, not also in RAM */ int nswget; /* [a] number of swap pages moved from disk to RAM */ int nanon; /* XXX number total of anon's in system */ int unused05; /* formerly nanonneeded */ int unused06; /* formerly nfreeanon */ /* stat counters */ int faults; /* [p] page fault count */ int traps; /* [a] trap count */ int intrs; /* [a] interrupt count */ int swtch; /* context switch count */ int softs; /* [a] software interrupt count */ int syscalls; /* [a] system calls */ int pageins; /* [p] pagein operation count */ /* pageouts are in pdpageouts below */ int pcphit; /* [a] # of pagealloc from per-CPU cache */ int pcpmiss; /* [a] # of times a per-CPU cache was empty */ int pgswapin; /* pages swapped in */ int pgswapout; /* [a] pages swapped out */ int forks; /* forks */ int forks_ppwait; /* forks where parent waits */ int forks_sharevm; /* forks where vmspace is shared */ int pga_zerohit; /* [a] pagealloc where zero wanted and zero was available */ int pga_zeromiss; /* [a] pagealloc where zero wanted and zero not available */ int unused09; /* formerly zeroaborts */ /* fault subcounters */ int fltnoram; /* [p] # of times fault was out of ram */ int fltnoanon; /* [p] # of times fault was out of anons */ int fltnoamap; /* [p] # of times fault was out of amap chunks */ int fltpgwait; /* [p] # of times fault had to wait on a page */ int fltpgrele; /* [p] # of times fault found a released page */ int fltrelck; /* [p] # of times fault relock is a success */ int fltnorelck; /* [p] # of times fault relock failed */ int fltanget; /* [p] # of times fault gets anon page */ int fltanretry; /* [p] # of times fault retrys an anon get */ int fltamcopy; /* [p] # of times fault clears "needs copy" */ int fltnamap; /* [p] # of times fault maps a neighbor anon page */ int fltnomap; /* [p] # of times fault maps a neighbor obj page */ int fltlget; /* [p] # of times fault does a locked pgo_get */ int fltget; /* [p] # of times fault does an unlocked get */ int flt_anon; /* [p] # of times fault anon (case 1a) */ int flt_acow; /* [p] # of times fault anon cow (case 1b) */ int flt_obj; /* [p] # of times fault is on object page (2a) */ int flt_prcopy; /* [p] # of times fault promotes with copy (2b) */ int flt_przero; /* [p] # of times fault promotes with zerofill (2b) */ int fltup; /* [p] # of times fault upgrade is a success */ int fltnoup; /* [p] # of times fault upgrade failed */ /* daemon counters */ int pdwoke; /* [ao] # of times daemon woke up */ int pdrevs; /* [ao] # of times daemon scanned for free pages */ int pdswout; /* [o] # of times daemon called for swapout */ int pdfreed; /* [ao] # of pages daemon freed since boot */ int pdscans; /* [ao] # of pages daemon scanned since boot */ int pdanscan; /* [ao] # of anonymous pages scanned by daemon */ int pdobscan; /* [ao] # of object pages scanned by daemon */ int pdreact; /* [ao] # of pages daemon reactivated since boot */ int pdbusy; /* [ao] # of times daemon found a busy page */ int pdpageouts; /* [ao] # of times daemon started a pageout */ int pdpending; /* [ao] # of times daemon got a pending pagout */ int pddeact; /* [ao] # of pages daemon deactivates */ int swpskip; /* [ao] # of pages delayed because swap crypt busy */ int fpswtch; /* [a] FPU context switches */ int kmapent; /* [a] number of kernel map entries */ }; struct _ps_strings { void *val; }; #ifdef _KERNEL static inline int atomic_load_sint(volatile const int *p) { return *p; } /* * Per-cpu UVM counters. */ extern struct cpumem *uvmexp_counters; enum uvm_exp_counters { /* stat counters */ faults, /* page fault count */ pageins, /* pagein operation count */ /* fault subcounters */ flt_noram, /* number of times fault was out of ram */ flt_noanon, /* number of times fault was out of anons */ flt_noamap, /* number of times fault was out of amap chunks */ flt_pgwait, /* number of times fault had to wait on a page */ flt_pgrele, /* number of times fault found a released page */ flt_relck, /* number of times fault relock is a success */ flt_norelck, /* number of times fault relock failed */ flt_anget, /* number of times fault gets anon page */ flt_anretry, /* number of times fault retrys an anon get */ flt_amcopy, /* number of times fault clears "needs copy" */ flt_namap, /* number of times fault maps a neighbor anon page */ flt_nomap, /* number of times fault maps a neighbor obj page */ flt_lget, /* number of times fault does a locked pgo_get */ flt_get, /* number of times fault does an unlocked get */ flt_anon, /* number of times fault anon (case 1a) */ flt_acow, /* number of times fault anon cow (case 1b) */ flt_obj, /* number of times fault is on object page (2a) */ flt_prcopy, /* number of times fault promotes with copy (2b) */ flt_przero, /* number of times fault promotes with zerofill (2b) */ flt_up, /* number of times fault upgrade is a success */ flt_noup, /* number of times fault upgrade failed */ exp_ncounters }; #endif /* _KERNEL */ #endif /*_UVM_UVMEXP_ */
