X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..bd504ef0e0b883cdd7917b73b3574eb9ce669905:/bsd/sys/kern_memorystatus.h?ds=sidebyside diff --git a/bsd/sys/kern_memorystatus.h b/bsd/sys/kern_memorystatus.h index f94c4a7a7..66fabee01 100644 --- a/bsd/sys/kern_memorystatus.h +++ b/bsd/sys/kern_memorystatus.h @@ -25,13 +25,33 @@ * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ -/*! - @header kern_memorystatus.h - This header defines a kernel event subclass for the OSMemoryNotification API - */ -#ifndef SYS_KERN_MEMORYSTATUS_H -#define SYS_KERN_MEMORYSTATUS_H +#ifndef SYS_MEMORYSTATUS_H +#define SYS_MEMORYSTATUS_H + +#include +#include +#include +#include + +#define DEFAULT_JETSAM_PRIORITY -100 + +enum { + kMemorystatusFlagsFrontmost = (1 << 0), + kMemorystatusFlagsKilled = (1 << 1), + kMemorystatusFlagsKilledHiwat = (1 << 2), + kMemorystatusFlagsFrozen = (1 << 3), + kMemorystatusFlagsKilledVnodes = (1 << 4), + kMemorystatusFlagsKilledSwap = (1 << 5), + kMemorystatusFlagsThawed = (1 << 6), + kMemorystatusFlagsKilledVM = (1 << 7), + kMemorystatusFlagsSuspForDiagnosis = (1 << 8), + kMemorystatusFlagsActive = (1 << 9), + kMemorystatusFlagsSupportsIdleExit = (1 << 10), + kMemorystatusFlagsDirty = (1 << 11) +}; + +#if TARGET_OS_EMBEDDED || CONFIG_EMBEDDED /* * Define Memory Status event subclass. @@ -45,18 +65,205 @@ #define KEV_MEMORYSTATUS_SUBCLASS 3 enum { - kMemoryStatusLevelAny = -1, - kMemoryStatusLevelNormal = 0, - kMemoryStatusLevelWarning = 1, - kMemoryStatusLevelUrgent = 2, - kMemoryStatusLevelCritical = 3 + kMemorystatusLevelNote = 1, + kMemorystatusSnapshotNote = 2, + kMemorystatusFreezeNote = 3, + kMemorystatusPressureNote = 4 }; -#ifdef KERNEL -extern void kern_memorystatus_init(void) __attribute__((section("__TEXT, initcode"))); +enum { + kMemorystatusLevelAny = -1, + kMemorystatusLevelNormal = 0, + kMemorystatusLevelWarning = 1, + kMemorystatusLevelUrgent = 2, + kMemorystatusLevelCritical = 3 +}; + +typedef struct memorystatus_priority_entry { + pid_t pid; + uint32_t flags; + int32_t hiwat_pages; + int32_t priority; + int32_t reserved; + int32_t reserved2; +} memorystatus_priority_entry_t; + +/* +** how many processes to snapshot +*/ +#define kMaxSnapshotEntries 128 + +typedef struct memorystatus_kernel_stats { + uint32_t free_pages; + uint32_t active_pages; + uint32_t inactive_pages; + uint32_t throttled_pages; + uint32_t purgeable_pages; + uint32_t wired_pages; +} memorystatus_kernel_stats_t; + +/* +** This is a variable-length struct. +** Allocate a buffer of the size returned by the sysctl, cast to a memorystatus_snapshot_t * +*/ + +typedef struct jetsam_snapshot_entry { + pid_t pid; + char name[MAXCOMLEN+1]; + int32_t priority; + uint32_t pages; + uint32_t flags; + uint8_t uuid[16]; +} memorystatus_jetsam_snapshot_entry_t; + +typedef struct jetsam_snapshot { + uint64_t snapshot_time; + uint64_t notification_time; + memorystatus_kernel_stats_t stats; + size_t entry_count; + memorystatus_jetsam_snapshot_entry_t entries[1]; +} memorystatus_jetsam_snapshot_t; + +typedef memorystatus_priority_entry_t jetsam_priority_entry_t; +typedef memorystatus_jetsam_snapshot_t jetsam_snapshot_t; +typedef memorystatus_jetsam_snapshot_entry_t jetsam_snapshot_entry_t; + +#define kMemoryStatusLevelNote kMemorystatusLevelNote +#define kMemoryStatusSnapshotNote kMemorystatusSnapshotNote +#define kMemoryStatusFreezeNote kMemorystatusFreezeNote +#define kMemoryStatusPressureNote kMemorystatusPressureNote + +typedef struct memorystatus_freeze_entry { + int32_t pid; + uint32_t flags; + uint32_t pages; +} memorystatus_freeze_entry_t; + +#endif /* TARGET_OS_EMBEDDED */ + +#ifdef XNU_KERNEL_PRIVATE + +/* General tunables */ + +#define DELTA_PERCENT 5 +#define CRITICAL_PERCENT 5 +#define HIGHWATER_PERCENT 10 +#define PRESSURE_PERCENT 15 +#define FREEZE_PERCENT 50 + +#define POLICY_MORE_FREE_OFFSET_PERCENT 5 +#define POLICY_DIAGNOSTIC_OFFSET_PERCENT 5 + +#define IDLE_EXIT_TIME_SECS 10 + +enum { + kProcessSuspended = (1 << 0), + kProcessFrozen = (1 << 1), + kProcessNoReclaimWorth = (1 << 2), + kProcessIgnored = (1 << 3), + kProcessLocked = (1 << 4), + kProcessKilled = (1 << 5), + kProcessNotifiedForPressure = (1 << 6), + kProcessPriorityUpdated = (1 << 7), + kProcessActive = (1 << 8), + kProcessForeground = (1 << 9), + kProcessSuspendedForDiag = (1 << 10), + kProcessSupportsIdleExit = (1 << 11), + kProcessDirty = (1 << 12), + kProcessIgnoreIdleExit = (1 << 13) +}; + +typedef struct memorystatus_node { + TAILQ_ENTRY(memorystatus_node) link; + pid_t pid; + int32_t priority; + uint32_t state; +#if CONFIG_JETSAM + int32_t hiwat_pages; +#endif +#if CONFIG_FREEZE + uint32_t resident_pages; +#endif + uint64_t clean_time; +} memorystatus_node; + +extern int memorystatus_wakeup; +extern unsigned int memorystatus_running; + +extern unsigned int memorystatus_available_pages; +extern unsigned int memorystatus_available_pages_critical; +extern unsigned int memorystatus_level; +extern unsigned int memorystatus_delta; + +extern void memorystatus_init(void) __attribute__((section("__TEXT, initcode"))); + +extern kern_return_t memorystatus_list_add(int pid, int priority, int high_water_mark); +extern kern_return_t memorystatus_list_change(boolean_t effective, int pid, int priority, int state_flags, int high_water_mark); +extern kern_return_t memorystatus_list_remove(int pid); + +extern kern_return_t memorystatus_on_track_dirty(int pid, boolean_t track); +extern kern_return_t memorystatus_on_dirty(int pid, boolean_t dirty); + +extern void memorystatus_on_suspend(int pid); +extern void memorystatus_on_resume(int pid); +extern void memorystatus_on_inactivity(int pid); + +#if CONFIG_JETSAM + +typedef enum memorystatus_policy_t { + kPolicyDefault = 0x0, + kPolicyMoreFree = 0x1, + kPolicyDiagnoseAll = 0x2, + kPolicyDiagnoseFirst = 0x4, + kPolicyDiagnoseActive = (kPolicyDiagnoseAll | kPolicyDiagnoseFirst), +} memorystatus_policy_t; + +extern int memorystatus_jetsam_wakeup; +extern unsigned int memorystatus_jetsam_running; + +extern int memorystatus_kill_top_proc(boolean_t any, uint32_t reason); +extern int memorystatus_kill_top_proc_from_VM(void); + +extern void memorystatus_update(unsigned int pages_avail); + +#if VM_PRESSURE_EVENTS + +#define MEMORYSTATUS_SUSPENDED_THRESHOLD 4 + +extern int memorystatus_request_vm_pressure_candidate(void); +extern void memorystatus_send_pressure_note(int pid); + +#endif /* VM_PRESSURE_EVENTS */ + +#endif /* CONFIG_JETSAM */ + +#ifdef CONFIG_FREEZE + +#define FREEZE_PAGES_MIN ( 1 * 1024 * 1024 / PAGE_SIZE) +#define FREEZE_PAGES_MAX (16 * 1024 * 1024 / PAGE_SIZE) + +#define FREEZE_SUSPENDED_THRESHOLD_LOW 2 +#define FREEZE_SUSPENDED_THRESHOLD_DEFAULT 4 + +#define FREEZE_DAILY_MB_MAX 1024 +#define FREEZE_DAILY_PAGEOUTS_MAX (FREEZE_DAILY_MB_MAX * (1024 * 1024 / PAGE_SIZE)) + +typedef struct throttle_interval_t { + uint32_t mins; + uint32_t burst_multiple; + uint32_t pageouts; + uint32_t max_pageouts; + mach_timespec_t ts; + boolean_t throttle; +} throttle_interval_t; + +extern boolean_t memorystatus_freeze_enabled; +extern int memorystatus_freeze_wakeup; + +extern void memorystatus_freeze_init(void) __attribute__((section("__TEXT, initcode"))); + +#endif /* CONFIG_FREEZE */ -extern int kern_memorystatus_wakeup; -extern int kern_memorystatus_level; +#endif /* XNU_KERNEL_PRIVATE */ -#endif /* KERNEL */ -#endif /* SYS_KERN_MEMORYSTATUS_H */ +#endif /* SYS_MEMORYSTATUS_H */