task_policy.h   [plain text]

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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#ifndef _MACH_TASK_POLICY_H_
#define _MACH_TASK_POLICY_H_

#include <mach/mach_types.h>

/*
 * These are the calls for accessing the policy parameters
 * of a particular task.
 *
 * The extra 'get_default' parameter to the second call is
 * IN/OUT as follows:
 * 1) if asserted on the way in it indicates that the default
 * values should be returned, not the ones currently set, in
 * this case 'get_default' will always be asserted on return;
 * 2) if unasserted on the way in, the current settings are
 * desired and if still unasserted on return, then the info
 * returned reflects the current settings, otherwise if
 * 'get_default' returns asserted, it means that there are no
 * current settings due to other parameters taking precedence,
 * and the default ones are being returned instead.
 */

typedef natural_t	task_policy_flavor_t;
typedef integer_t	*task_policy_t;

/*
kern_return_t	task_policy_set(
					task_t					task,
					task_policy_flavor_t	flavor,
					task_policy_t			policy_info,
					mach_msg_type_number_t	count);

kern_return_t	task_policy_get(
					task_t					task,
					task_policy_flavor_t	flavor,
					task_policy_t			policy_info,
					mach_msg_type_number_t	*count,
					boolean_t				*get_default);
*/

/*
 * Defined flavors.
 */
/*
 * TASK_CATEGORY_POLICY:
 *
 * This provides information to the kernel about the role
 * of the task in the system.
 *
 * Parameters:
 *
 * role: Enumerated as follows:
 *
 * TASK_UNSPECIFIED is the default, since the role is not
 * inherited from the parent.
 *
 * TASK_FOREGROUND_APPLICATION should be assigned when the
 * task is a normal UI application in the foreground from
 * the HI point of view.
 * **N.B. There may be more than one of these at a given time.
 *
 * TASK_BACKGROUND_APPLICATION should be assigned when the
 * task is a normal UI application in the background from
 * the HI point of view.
 *
 * TASK_CONTROL_APPLICATION should be assigned to the unique
 * UI application which implements the pop-up application dialog.
 * There can only be one task at a time with this designation,
 * which is assigned FCFS.
 *
 * TASK_GRAPHICS_SERVER should be assigned to the graphics
 * management (window) server.  There can only be one task at
 * a time with this designation, which is assigned FCFS.
 */

#define TASK_CATEGORY_POLICY		1

#define TASK_SUPPRESSION_POLICY		3
#define TASK_POLICY_STATE		4
#define TASK_BASE_QOS_POLICY		8
#define TASK_OVERRIDE_QOS_POLICY	9
#define TASK_BASE_LATENCY_QOS_POLICY	10
#define TASK_BASE_THROUGHPUT_QOS_POLICY	11


enum task_role {
	TASK_RENICED = -1,
	TASK_UNSPECIFIED = 0,
	TASK_FOREGROUND_APPLICATION,
	TASK_BACKGROUND_APPLICATION,
	TASK_CONTROL_APPLICATION,
	TASK_GRAPHICS_SERVER,
	TASK_THROTTLE_APPLICATION,
	TASK_NONUI_APPLICATION,
	TASK_DEFAULT_APPLICATION
};

typedef integer_t	task_role_t;

struct task_category_policy {
	task_role_t		role;
};

typedef struct task_category_policy		task_category_policy_data_t;
typedef struct task_category_policy		*task_category_policy_t;

#define TASK_CATEGORY_POLICY_COUNT	((mach_msg_type_number_t) \
	(sizeof (task_category_policy_data_t) / sizeof (integer_t)))


enum task_latency_qos {
	LATENCY_QOS_TIER_UNSPECIFIED = 0x0,
	LATENCY_QOS_TIER_0 = ((0xFF<<16) | 1),
	LATENCY_QOS_TIER_1 = ((0xFF<<16) | 2),
	LATENCY_QOS_TIER_2 = ((0xFF<<16) | 3),
	LATENCY_QOS_TIER_3 = ((0xFF<<16) | 4),
	LATENCY_QOS_TIER_4 = ((0xFF<<16) | 5),
	LATENCY_QOS_TIER_5 = ((0xFF<<16) | 6)

};
typedef integer_t	task_latency_qos_t;
enum task_throughput_qos {
	THROUGHPUT_QOS_TIER_UNSPECIFIED = 0x0,
	THROUGHPUT_QOS_TIER_0 = ((0xFE<<16) | 1),
	THROUGHPUT_QOS_TIER_1 = ((0xFE<<16) | 2),
	THROUGHPUT_QOS_TIER_2 = ((0xFE<<16) | 3),
	THROUGHPUT_QOS_TIER_3 = ((0xFE<<16) | 4),
	THROUGHPUT_QOS_TIER_4 = ((0xFE<<16) | 5),
	THROUGHPUT_QOS_TIER_5 = ((0xFE<<16) | 6),
};

#define LATENCY_QOS_LAUNCH_DEFAULT_TIER LATENCY_QOS_TIER_3
#define THROUGHPUT_QOS_LAUNCH_DEFAULT_TIER THROUGHPUT_QOS_TIER_3

typedef integer_t	task_throughput_qos_t;

struct task_qos_policy {
	task_latency_qos_t task_latency_qos_tier;
	task_throughput_qos_t task_throughput_qos_tier;
};

typedef struct task_qos_policy *task_qos_policy_t;
#define TASK_QOS_POLICY_COUNT	((mach_msg_type_number_t) \
	(sizeof (struct task_qos_policy) / sizeof (integer_t)))

/* These should be removed - they belong in proc_info.h */
#define PROC_FLAG_DARWINBG           0x8000    /* process in darwin background */
#define PROC_FLAG_EXT_DARWINBG		 0x10000   /* process in darwin background - external enforcement */
#define PROC_FLAG_IOS_APPLEDAEMON    0x20000   /* process is apple ios daemon */
#define PROC_FLAG_IOS_IMPPROMOTION   0x80000   /* process is apple ios daemon */
#define PROC_FLAG_ADAPTIVE           0x100000  /* Process is adaptive */
#define PROC_FLAG_ADAPTIVE_IMPORTANT 0x200000  /* Process is adaptive, and is currently important */
#define PROC_FLAG_IMPORTANCE_DONOR   0x400000  /* Process is marked as an importance donor */
#define PROC_FLAG_SUPPRESSED         0x800000  /* Process is suppressed */
#define PROC_FLAG_APPLICATION        0x1000000 /* Process is an application */
#define PROC_FLAG_IOS_APPLICATION PROC_FLAG_APPLICATION /* Process is an application */

#ifdef PRIVATE

struct task_requested_policy {
	/* Task and thread policy (inherited) */
	uint64_t        int_darwinbg        :1,     /* marked as darwinbg via setpriority */
	                ext_darwinbg        :1,
	                int_iotier          :2,     /* IO throttle tier */
	                ext_iotier          :2,
	                int_iopassive       :1,     /* should IOs cause lower tiers to be throttled */
	                ext_iopassive       :1,
	                bg_iotier           :2,     /* what IO throttle tier should apply to me when I'm darwinbg? (pushed to threads) */
	                terminated          :1,     /* all throttles should be removed for quick exit or SIGTERM handling */

	/* Thread only policy */
	                th_pidbind_bg       :1,     /* thread only: task i'm bound to is marked 'watchbg' */
	                th_workq_bg         :1,     /* thread only: currently running a background priority workqueue */
	                thrp_qos            :3,     /* thread only: thread qos class */
	                thrp_qos_relprio    :4,     /* thread only: thread qos relative priority (store as inverse, -10 -> 0xA) */
	                thrp_qos_override   :3,     /* thread only: thread qos class override */

	/* Task only policy */
	                t_apptype           :3,     /* What apptype did launchd tell us this was (inherited) */
	                t_boosted           :1,     /* Has a non-zero importance assertion count */
	                t_int_gpu_deny      :1,     /* don't allow access to GPU */
	                t_ext_gpu_deny      :1,
	                t_role              :3,     /* task's system role */
	                t_tal_enabled       :1,     /* TAL mode is enabled */
	                t_base_latency_qos  :3,     /* Timer latency QoS */
	                t_over_latency_qos  :3,     /* Timer latency QoS override */
	                t_base_through_qos  :3,     /* Computation throughput QoS */
	                t_over_through_qos  :3,     /* Computation throughput QoS override */
	                t_sfi_managed       :1,     /* SFI Managed task */
	                t_qos_clamp         :3,     /* task qos clamp */

	/* Task only: suppression policies (non-embedded only) */
	                t_sup_active        :1,     /* Suppression is on */
	                t_sup_lowpri_cpu    :1,     /* Wants low priority CPU (MAXPRI_THROTTLE) */
	                t_sup_timer         :3,     /* Wanted timer throttling QoS tier */
	                t_sup_disk          :1,     /* Wants disk throttling */
	                t_sup_cpu_limit     :1,     /* Wants CPU limit (not hooked up yet)*/
	                t_sup_suspend       :1,     /* Wants to be suspended */
	                t_sup_throughput    :3,     /* Wants throughput QoS tier */
	                t_sup_cpu           :1,     /* Wants suppressed CPU priority (MAXPRI_SUPPRESSED) */
	                t_sup_bg_sockets    :1,     /* Wants background sockets */

	                reserved            :2;
};

struct task_effective_policy {
	/* Task and thread policy */
	uint64_t        darwinbg            :1,     /* marked as 'background', and sockets are marked bg when created */
	                lowpri_cpu          :1,     /* cpu priority == MAXPRI_THROTTLE */
	                io_tier             :2,     /* effective throttle tier */
	                io_passive          :1,     /* should IOs cause lower tiers to be throttled */
	                all_sockets_bg      :1,     /* All existing sockets in process are marked as bg (thread: all created by thread) */
	                new_sockets_bg      :1,     /* Newly created sockets should be marked as bg */
	                bg_iotier           :2,     /* What throttle tier should I be in when darwinbg is set? */
	                terminated          :1,     /* all throttles have been removed for quick exit or SIGTERM handling */
	                qos_ui_is_urgent    :1,     /* bump UI-Interactive QoS up to the urgent preemption band */

	/* Thread only policy */
	                thep_qos            :3,     /* thread only: thread qos class */
	                thep_qos_relprio    :4,     /* thread only: thread qos relative priority (store as inverse, -10 -> 0xA) */

	/* Task only policy */
	                t_gpu_deny          :1,     /* not allowed to access GPU */
	                t_tal_engaged       :1,     /* TAL mode is in effect */
	                t_suspended         :1,     /* task_suspend-ed due to suppression */
	                t_watchers_bg       :1,     /* watchers are BG-ed */
	                t_latency_qos       :3,     /* Timer latency QoS level */
	                t_through_qos       :3,     /* Computation throughput QoS level */
	                t_sup_active        :1,     /* suppression behaviors are in effect */
	                t_role              :3,     /* task's system role */
	                t_suppressed_cpu    :1,     /* cpu priority == MAXPRI_SUPPRESSED (trumped by lowpri_cpu) */
	                t_sfi_managed       :1,     /* SFI Managed task */
	                t_live_donor        :1,     /* task is a live importance boost donor */
	                t_qos_clamp         :3,     /* task qos clamp (applies to qos-disabled threads too) */
	                t_qos_ceiling       :3,     /* task qos ceiling (applies to only qos-participating threads) */

	                reserved            :23;
};

struct task_pended_policy {
	uint64_t        t_updating_policy   :1,     /* Busy bit for task to prevent concurrent 'complete' operations */

	/* Task and thread policy */
	                update_sockets      :1,

	/* Task only policy */
	                t_update_timers     :1,
	                t_update_watchers   :1,

	                reserved            :60;
};

#endif

#ifdef MACH_KERNEL_PRIVATE

extern const struct task_requested_policy default_task_requested_policy;
extern const struct task_effective_policy default_task_effective_policy;
extern const struct task_pended_policy    default_task_pended_policy;

extern kern_return_t
qos_latency_policy_validate(task_latency_qos_t);

extern kern_return_t
qos_throughput_policy_validate(task_throughput_qos_t);

extern uint32_t
qos_extract(uint32_t);

extern uint32_t
qos_latency_policy_package(uint32_t);
extern uint32_t
qos_throughput_policy_package(uint32_t);

#endif /* MACH_KERNEL_PRIVATE */

#ifdef PRIVATE

/*
 * Control structure for applying suppression behaviors to tasks
 */
struct task_suppression_policy {
	integer_t active;
	integer_t lowpri_cpu;  /* priority MAXPRI_THROTTLE cpu */
	integer_t timer_throttle;
	integer_t disk_throttle;
	integer_t cpu_limit;
	integer_t suspend;
	integer_t throughput_qos;
	integer_t suppressed_cpu; /* priority MAXPRI_SUPPRESSED cpu */
	integer_t background_sockets;
	integer_t reserved[7];
};

typedef struct task_suppression_policy *task_suppression_policy_t;

#define TASK_SUPPRESSION_POLICY_COUNT	((mach_msg_type_number_t) \
	(sizeof (struct task_suppression_policy) / sizeof (integer_t)))

struct task_policy_state {
	uint64_t requested;
	uint64_t effective;
	uint64_t pending;
	uint32_t imp_assertcnt;
	uint32_t imp_externcnt;
	uint64_t flags;
	uint64_t imp_transitions;
	uint64_t reserved[2];
};

typedef struct task_policy_state *task_policy_state_t;

#define TASK_POLICY_STATE_COUNT	((mach_msg_type_number_t) \
	(sizeof (struct task_policy_state) / sizeof (integer_t)))


/*
 * Definitions for munging and unmunging a policy struct
 * Used in task_policy_state and in tracepoints
 *
 * Note: this is tightly bound to the implementation of task policy
 * and the values exported through this API may change or change meaning at any time
 *
 * Do not rely on these values, especially apptype, to decide behaviors at runtime.
 *
 * All per-thread state must be in the first 32 bits of the bitfield.
 */

#define TASK_APPTYPE_NONE                0
#define TASK_APPTYPE_DAEMON_INTERACTIVE  1
#define TASK_APPTYPE_DAEMON_STANDARD     2
#define TASK_APPTYPE_DAEMON_ADAPTIVE     3
#define TASK_APPTYPE_DAEMON_BACKGROUND   4
#define TASK_APPTYPE_APP_DEFAULT         5
#define TASK_APPTYPE_APP_TAL             6

/* task policy state flags */
#define TASK_IMP_RECEIVER                    0x00000001
#define TASK_IMP_DONOR                       0x00000002
#define TASK_IMP_LIVE_DONOR		     0x00000004
#define TASK_DENAP_RECEIVER		     0x00000008

/* requested_policy */
#define POLICY_REQ_INT_DARWIN_BG             0x00000001
#define POLICY_REQ_EXT_DARWIN_BG             0x00000002
#define POLICY_REQ_INT_IO_TIER_MASK          0x0000000c /* 2 bits */
#define POLICY_REQ_INT_IO_TIER_SHIFT         2
#define POLICY_REQ_EXT_IO_TIER_MASK          0x00000030 /* 2 bits */
#define POLICY_REQ_EXT_IO_TIER_SHIFT         4
#define POLICY_REQ_INT_PASSIVE_IO            0x00000040
#define POLICY_REQ_EXT_PASSIVE_IO            0x00000080
#define POLICY_REQ_BG_IOTIER_MASK            0x00000300 /* 2 bits */
#define POLICY_REQ_BG_IOTIER_SHIFT           8

/* thread requested policy */
#define POLICY_REQ_PIDBIND_BG                0x00000400
#define POLICY_REQ_WORKQ_BG                  0x00000800
#define POLICY_REQ_TH_QOS_MASK               0x07000000 /* 3 bits (overlaps with ROLE) */
#define POLICY_REQ_TH_QOS_SHIFT              24
#define POLICY_REQ_TH_QOS_OVER_MASK          0x70000000 /* 3 bits (overlaps with TAL and SFI) */
#define POLICY_REQ_TH_QOS_OVER_SHIFT         28

/* task_requested_policy */
#define POLICY_REQ_TERMINATED                0x00001000
#define POLICY_REQ_BOOSTED                   0x00002000
#define POLICY_REQ_INT_GPU_DENY              0x00004000
#define POLICY_REQ_EXT_GPU_DENY              0x00008000
#define POLICY_REQ_APPTYPE_MASK              0x00070000 /* 3 bits */
#define POLICY_REQ_APPTYPE_SHIFT             16
#define POLICY_REQ_BASE_LATENCY_QOS_MASK     0x00700000 /* 3 bits */
#define POLICY_REQ_BASE_LATENCY_QOS_SHIFT    20
#define POLICY_REQ_ROLE_MASK                 0x07000000 /* 3 bits */
#define POLICY_REQ_ROLE_SHIFT                24
#define POLICY_REQ_TAL_ENABLED               0x40000000
#define POLICY_REQ_SFI_MANAGED               0x80000000

/* requested suppression behaviors (note: clipped off in 32-bit tracepoints) */
#define POLICY_REQ_SUP_ACTIVE                0x0000000100000000
#define POLICY_REQ_SUP_LOWPRI_CPU            0x0000000200000000
#define POLICY_REQ_SUP_CPU                   0x0000000400000000
#define POLICY_REQ_SUP_DISK_THROTTLE         0x0000003000000000 /* 2 bits */
#define POLICY_REQ_SUP_CPU_LIMIT             0x0000004000000000
#define POLICY_REQ_SUP_SUSPEND               0x0000008000000000
#define POLICY_REQ_OVER_LATENCY_QOS_MASK     0x0000070000000000 /* 3 bits */
#define POLICY_REQ_OVER_LATENCY_QOS_SHIFT    40
#define POLICY_REQ_BASE_THROUGH_QOS_MASK     0x0000700000000000 /* 3 bits */
#define POLICY_REQ_BASE_THROUGH_QOS_SHIFT    44
#define POLICY_REQ_OVER_THROUGH_QOS_MASK     0x0007000000000000 /* 3 bits */
#define POLICY_REQ_OVER_THROUGH_QOS_SHIFT    48
#define POLICY_REQ_SUP_TIMER_THROTTLE_MASK   0x0070000000000000 /* 3 bits */
#define POLICY_REQ_SUP_TIMER_THROTTLE_SHIFT  52
#define POLICY_REQ_SUP_THROUGHPUT_MASK       0x0700000000000000 /* 3 bits */
#define POLICY_REQ_SUP_THROUGHPUT_SHIFT      56
#define POLICY_REQ_SUP_BG_SOCKETS            0x0800008000000000
#define POLICY_REQ_QOS_CLAMP_MASK            0x7000000000000000 /* 3 bits */
#define POLICY_REQ_QOS_CLAMP_SHIFT           60

/* effective policy */
#define POLICY_EFF_IO_TIER_MASK              0x00000003 /* 2 bits */
#define POLICY_EFF_IO_TIER_SHIFT             0
#define POLICY_EFF_IO_PASSIVE                0x00000008
#define POLICY_EFF_DARWIN_BG                 0x00000010
#define POLICY_EFF_LOWPRI_CPU                0x00000020
#define POLICY_EFF_ALL_SOCKETS_BG            0x00000040
#define POLICY_EFF_NEW_SOCKETS_BG            0x00000080
#define POLICY_EFF_BG_IOTIER_MASK            0x00000300 /* 2 bits */
#define POLICY_EFF_BG_IOTIER_SHIFT           8
#define POLICY_EFF_TERMINATED                0x00000400
#define POLICY_EFF_QOS_UI_IS_URGENT          0x80000000

/* thread effective policy */
#define POLICY_EFF_TH_QOS_MASK               0x00700000 /* 3 bits (overlaps with ROLE) */
#define POLICY_EFF_TH_QOS_SHIFT              20
#define POLICY_EFF_LATENCY_QOS_MASK          0x00070000 /* 3 bits */
#define POLICY_EFF_LATENCY_QOS_SHIFT         16
#define POLICY_EFF_THROUGH_QOS_MASK          0x07000000 /* 3 bits */
#define POLICY_EFF_THROUGH_QOS_SHIFT         24

/* task effective policy */
#define POLICY_EFF_GPU_DENY                  0x00001000
#define POLICY_EFF_TAL_ENGAGED               0x00002000
#define POLICY_EFF_SUSPENDED                 0x00004000
#define POLICY_EFF_WATCHERS_BG               0x00008000
#define POLICY_EFF_SUP_ACTIVE                0x00080000
#define POLICY_EFF_ROLE_MASK                 0x00700000 /* 3 bits */
#define POLICY_EFF_ROLE_SHIFT                20
#define POLICY_EFF_SUP_CPU                   0x00800000
#define POLICY_EFF_SFI_MANAGED               0x08000000
#define POLICY_EFF_QOS_CEILING_MASK          0x70000000
#define POLICY_EFF_QOS_CEILING_SHIFT         28

/* pending policy */
#define POLICY_PEND_UPDATING                 0x00000001
#define POLICY_PEND_SOCKETS                  0x00000002
#define POLICY_PEND_TIMERS                   0x00000004
#define POLICY_PEND_WATCHERS                 0x00000008

#endif /* PRIVATE */

#endif	/* _MACH_TASK_POLICY_H_ */