kern_memorystatus_freeze.h [plain text]
#ifndef SYS_MEMORYSTATUS_FREEZE_H
#define SYS_MEMORYSTATUS_FREEZE_H
#include <stdint.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/param.h>
#include <sys/kern_memorystatus.h>
#include <mach/resource_monitors.h> // command/proc_name_t
typedef struct memorystatus_freeze_entry {
int32_t pid;
uint32_t flags;
uint32_t pages;
} memorystatus_freeze_entry_t;
#ifdef PRIVATE
#define FREEZE_PROCESSES_MAX 20
#endif
#ifdef XNU_KERNEL_PRIVATE
extern unsigned long freeze_threshold_percentage;
extern unsigned int memorystatus_frozen_count;
extern unsigned int memorystatus_frozen_processes_max;
extern unsigned int memorystatus_frozen_shared_mb;
extern unsigned int memorystatus_frozen_shared_mb_max;
extern unsigned int memorystatus_freeze_shared_mb_per_process_max;
extern unsigned int memorystatus_freeze_private_shared_pages_ratio;
extern unsigned int memorystatus_suspended_count;
extern unsigned int memorystatus_thaw_count;
extern unsigned int memorystatus_refreeze_eligible_count;
extern uint32_t memorystatus_freeze_current_interval;
void memorystatus_freeze_init(void);
extern int memorystatus_freeze_process_sync(proc_t p);
#ifdef CONFIG_FREEZE
#define FREEZE_PAGES_MIN ( 8 * 1024 * 1024 / PAGE_SIZE)
#define FREEZE_PAGES_MAX (max_task_footprint_mb == 0 ? INT_MAX : (max_task_footprint_mb << (20 - PAGE_SHIFT)))
#define FREEZE_SUSPENDED_THRESHOLD_DEFAULT 4
#define FREEZE_DAILY_MB_MAX_DEFAULT 1024
#define FREEZE_DEGRADATION_BUDGET_THRESHOLD 25 //degraded perf. when the daily budget left falls below this threshold percentage
#define MAX_FROZEN_SHARED_MB_PERCENT 10
#define MAX_FROZEN_PROCESS_DEMOTIONS 2
#define MIN_THAW_DEMOTION_THRESHOLD 5
#define MIN_THAW_REFREEZE_THRESHOLD 3
typedef struct throttle_interval_t {
uint32_t mins;
uint32_t burst_multiple;
uint32_t pageouts;
uint32_t max_pageouts;
mach_timespec_t ts;
} throttle_interval_t;
extern boolean_t memorystatus_freeze_enabled;
extern int memorystatus_freeze_wakeup;
extern unsigned int memorystatus_freeze_threshold;
extern unsigned int memorystatus_freeze_pages_min;
extern unsigned int memorystatus_freeze_pages_max;
extern unsigned int memorystatus_freeze_suspended_threshold;
extern unsigned int memorystatus_freeze_daily_mb_max;
extern uint64_t memorystatus_freeze_budget_pages_remaining; extern boolean_t memorystatus_freeze_degradation;
extern unsigned int memorystatus_max_frozen_demotions_daily;
extern unsigned int memorystatus_thaw_count_demotion_threshold;
#if DEVELOPMENT || DEBUG
#define FREEZER_CONTROL_GET_STATUS (1)
#endif
extern boolean_t memorystatus_freeze_enabled;
extern int memorystatus_freeze_wakeup;
extern int memorystatus_freeze_jetsam_band;
boolean_t memorystatus_freeze_thread_should_run(void);
int memorystatus_set_process_is_freezable(pid_t pid, boolean_t is_freezable);
int memorystatus_get_process_is_freezable(pid_t pid, int *is_freezable);
int memorystatus_freezer_control(int32_t flags, user_addr_t buffer, size_t buffer_size, int32_t *retval);
void memorystatus_freeze_init_proc(proc_t p);
errno_t memorystatus_get_process_is_frozen(pid_t pid, int *is_freezable);
struct memorystatus_freezer_stats_t {
uint64_t mfs_process_considered_count;
uint64_t mfs_error_excess_shared_memory_count;
uint64_t mfs_error_low_private_shared_ratio_count;
uint64_t mfs_error_no_compressor_space_count;
uint64_t mfs_error_no_swap_space_count;
uint64_t mfs_error_below_min_pages_count;
uint64_t mfs_error_low_probability_of_use_count;
uint64_t mfs_error_other_count;
uint64_t mfs_below_threshold_count;
uint64_t mfs_skipped_full_count;
uint64_t mfs_skipped_shared_mb_high_count;
uint64_t mfs_shared_pages_skipped;
uint64_t mfs_bytes_refrozen;
uint64_t mfs_refreeze_count;
uint64_t mfs_processes_frozen;
uint64_t mfs_processes_thawed;
};
extern struct memorystatus_freezer_stats_t memorystatus_freezer_stats;
#endif
#endif
#ifdef PRIVATE
#define FREEZER_CONTROL_GET_PROCS (2)
#define FREEZER_CONTROL_GET_PROCS_MAX_COUNT (FREEZE_PROCESSES_MAX * 2)
typedef struct _global_frozen_procs {
size_t gfp_num_frozen;
struct {
pid_t fp_pid;
proc_name_t fp_name;
} gfp_procs[FREEZER_CONTROL_GET_PROCS_MAX_COUNT];
} global_frozen_procs_t;
#endif
#endif