projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| cb323159 A |
1 | /* |
| 2 | * Copyright (c) 2006-2018 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * This file contains Original Code and/or Modifications of Original Code | |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. The rights granted to you under the License | |
| 10 | * may not be used to create, or enable the creation or redistribution of, | |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | * terms of an Apple operating system software license agreement. | |
| 14 | * | |
| 15 | * Please obtain a copy of the License at | |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 17 | * | |
| 18 | * The Original Code and all software distributed under the License are | |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 25 | * | |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
| 27 | */ | |
| 28 | ||
| 29 | #ifndef SYS_MEMORYSTATUS_FREEZE_H | |
| 30 | #define SYS_MEMORYSTATUS_FREEZE_H | |
| 31 | ||
| 32 | #include <stdint.h> | |
| 33 | #include <sys/time.h> | |
| 34 | #include <sys/proc.h> | |
| 35 | #include <sys/param.h> | |
| 36 | #include <sys/kern_memorystatus.h> | |
| 37 | ||
| 38 | typedef struct memorystatus_freeze_entry { | |
| 39 | int32_t pid; | |
| 40 | uint32_t flags; | |
| 41 | uint32_t pages; | |
| 42 | } memorystatus_freeze_entry_t; | |
| 43 | ||
| 44 | #ifdef XNU_KERNEL_PRIVATE | |
| 45 | ||
| 46 | extern unsigned long freeze_threshold_percentage; | |
| 47 | extern unsigned int memorystatus_frozen_count; | |
| 48 | extern unsigned int memorystatus_frozen_processes_max; | |
| 49 | extern unsigned int memorystatus_frozen_shared_mb; | |
| 50 | extern unsigned int memorystatus_frozen_shared_mb_max; | |
| 51 | extern unsigned int memorystatus_freeze_shared_mb_per_process_max; /* Max. MB allowed per process to be freezer-eligible. */ | |
| 52 | extern unsigned int memorystatus_freeze_private_shared_pages_ratio; /* Ratio of private:shared pages for a process to be freezer-eligible. */ | |
| 53 | extern unsigned int memorystatus_suspended_count; | |
| 54 | extern unsigned int memorystatus_thaw_count; | |
| 55 | extern unsigned int memorystatus_refreeze_eligible_count; /* # of processes currently thawed i.e. have state on disk & in-memory */ | |
| 56 | ||
| 57 | void memorystatus_freeze_init(void); | |
| 58 | extern int memorystatus_freeze_process_sync(proc_t p); | |
| 59 | ||
| 60 | #ifdef CONFIG_FREEZE | |
| 61 | ||
| 62 | #define FREEZE_PAGES_MIN ( 8 * 1024 * 1024 / PAGE_SIZE) | |
| 63 | #define FREEZE_PAGES_MAX (max_task_footprint_mb == 0 ? INT_MAX : (max_task_footprint_mb << (20 - PAGE_SHIFT))) | |
| 64 | ||
| 65 | #define FREEZE_SUSPENDED_THRESHOLD_DEFAULT 4 | |
| 66 | #define FREEZE_PROCESSES_MAX 20 | |
| 67 | ||
| 68 | #define FREEZE_DAILY_MB_MAX_DEFAULT 1024 | |
| 69 | #define FREEZE_DEGRADATION_BUDGET_THRESHOLD 25 //degraded perf. when the daily budget left falls below this threshold percentage | |
| 70 | ||
| 71 | #define MAX_FROZEN_SHARED_MB_PERCENT 10 | |
| 72 | #define MAX_FROZEN_PROCESS_DEMOTIONS 2 | |
| 73 | #define MIN_THAW_DEMOTION_THRESHOLD 5 | |
| 74 | #define MIN_THAW_REFREEZE_THRESHOLD 3 /* min # of global thaws needed for us to consider refreezing these processes. */ | |
| 75 | ||
| 76 | typedef struct throttle_interval_t { | |
| 77 | uint32_t mins; | |
| 78 | uint32_t burst_multiple; | |
| 79 | uint32_t pageouts; | |
| 80 | uint32_t max_pageouts; | |
| 81 | mach_timespec_t ts; | |
| 82 | } throttle_interval_t; | |
| 83 | ||
| 84 | extern boolean_t memorystatus_freeze_enabled; | |
| 85 | extern int memorystatus_freeze_wakeup; | |
| 86 | ||
| 87 | /* Thresholds */ | |
| 88 | extern unsigned int memorystatus_freeze_threshold; | |
| 89 | extern unsigned int memorystatus_freeze_pages_min; | |
| 90 | extern unsigned int memorystatus_freeze_pages_max; | |
| 91 | extern unsigned int memorystatus_freeze_suspended_threshold; | |
| 92 | extern unsigned int memorystatus_freeze_daily_mb_max; | |
| 93 | extern uint64_t memorystatus_freeze_budget_pages_remaining; //remaining # of pages that can be frozen to disk | |
| 94 | extern boolean_t memorystatus_freeze_degradation; //protected by the freezer mutex. Signals we are in a degraded freeze mode. | |
| 95 | ||
| 96 | extern unsigned int memorystatus_max_frozen_demotions_daily; | |
| 97 | extern unsigned int memorystatus_thaw_count_demotion_threshold; | |
| 98 | ||
| 99 | #if DEVELOPMENT || DEBUG | |
| 100 | #define FREEZER_CONTROL_GET_STATUS (1) | |
| 101 | #endif /* DEVELOPMENT || DEBUG */ | |
| 102 | ||
| 103 | extern boolean_t memorystatus_freeze_enabled; | |
| 104 | extern int memorystatus_freeze_wakeup; | |
| 105 | extern int memorystatus_freeze_jetsam_band; /* the jetsam band which will contain P_MEMSTAT_FROZEN processes */ | |
| 106 | ||
| 107 | boolean_t memorystatus_freeze_thread_should_run(void); | |
| 108 | int memorystatus_set_process_is_freezable(pid_t pid, boolean_t is_freezable); | |
| 109 | int memorystatus_get_process_is_freezable(pid_t pid, int *is_freezable); | |
| 110 | int memorystatus_freezer_control(int32_t flags, user_addr_t buffer, size_t buffer_size, int32_t *retval); | |
| 111 | ||
| 112 | #endif /* CONFIG_FREEZE */ | |
| 113 | ||
| 114 | #endif /* XNU_KERNEL_PRIVATE */ | |
| 115 | ||
| 116 | #endif /* SYS_MEMORYSTATUS_FREEZE_H */ |