xnu-7195.101.1.tar.gz

[apple/xnu.git] / osfmk / mach / task_policy.h

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 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
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 * 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,
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 * circumvent, violate, or enable the circumvention or violation of, any
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 * 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
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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

typedef enum task_role {
	TASK_RENICED                    = -1,
	TASK_UNSPECIFIED                = 0,
	TASK_FOREGROUND_APPLICATION     = 1,
	TASK_BACKGROUND_APPLICATION     = 2,
	TASK_CONTROL_APPLICATION        = 3,
	TASK_GRAPHICS_SERVER            = 4,
	TASK_THROTTLE_APPLICATION       = 5,
	TASK_NONUI_APPLICATION          = 6,
	TASK_DEFAULT_APPLICATION        = 7,
	TASK_DARWINBG_APPLICATION       = 8,
} 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

/*
 * Internal bitfields are privately exported for *revlocked*
 * tools like msa to decode tracepoints and taskinfo to dump state
 *
 * These struct definitions *will* change in the future.
 * When they do, we will update TASK_POLICY_INTERNAL_STRUCT_VERSION.
 */

#define TASK_POLICY_INTERNAL_STRUCT_VERSION 4

#define trp_tal_enabled trp_reserved  /*  trp_tal_enabled is unused, reuse its slot to grow trp_role */

struct task_requested_policy {
	uint64_t        trp_int_darwinbg        :1,     /* marked as darwinbg via setpriority */
	    trp_ext_darwinbg        :1,
	    trp_int_iotier          :2,                 /* IO throttle tier */
	    trp_ext_iotier          :2,
	    trp_int_iopassive       :1,                 /* should IOs cause lower tiers to be throttled */
	    trp_ext_iopassive       :1,
	    trp_bg_iotier           :2,                 /* what IO throttle tier should apply to me when I'm darwinbg? (pushed to threads) */
	    trp_terminated          :1,                 /* all throttles should be removed for quick exit or SIGTERM handling */
	    trp_base_latency_qos    :3,                 /* Timer latency QoS */
	    trp_base_through_qos    :3,                 /* Computation throughput QoS */

	    trp_apptype             :3,                 /* What apptype did launchd tell us this was (inherited) */
	    trp_boosted             :1,                 /* Has a non-zero importance assertion count */
	    trp_role                :5,                 /* task's system role */
	    trp_over_latency_qos    :3,                 /* Timer latency QoS override */
	    trp_over_through_qos    :3,                 /* Computation throughput QoS override */
	    trp_sfi_managed         :1,                 /* SFI Managed task */
	    trp_qos_clamp           :3,                 /* task qos clamp */

	/* suppression policies (non-embedded only) */
	    trp_sup_active          :1,                 /* Suppression is on */
	    trp_sup_lowpri_cpu      :1,                 /* Wants low priority CPU (MAXPRI_THROTTLE) */
	    trp_sup_timer           :3,                 /* Wanted timer throttling QoS tier */
	    trp_sup_disk            :1,                 /* Wants disk throttling */
	    trp_sup_throughput      :3,                 /* Wants throughput QoS tier */
	    trp_sup_cpu             :1,                 /* Wants suppressed CPU priority (MAXPRI_SUPPRESSED) */
	    trp_sup_bg_sockets      :1,                 /* Wants background sockets */

	    trp_reserved            :17;
};

struct task_effective_policy {
	uint64_t        tep_darwinbg            :1,     /* marked as 'background', and sockets are marked bg when created */
	    tep_lowpri_cpu          :1,                 /* cpu priority == MAXPRI_THROTTLE */
	    tep_io_tier             :2,                 /* effective throttle tier */
	    tep_io_passive          :1,                 /* should IOs cause lower tiers to be throttled */
	    tep_all_sockets_bg      :1,                 /* All existing sockets in process are marked as bg (thread: all created by thread) */
	    tep_new_sockets_bg      :1,                 /* Newly created sockets should be marked as bg */
	    tep_bg_iotier           :2,                 /* What throttle tier should I be in when darwinbg is set? */
	    tep_terminated          :1,                 /* all throttles have been removed for quick exit or SIGTERM handling */
	    tep_qos_ui_is_urgent    :1,                 /* bump UI-Interactive QoS up to the urgent preemption band */
	    tep_latency_qos         :3,                 /* Timer latency QoS level */
	    tep_through_qos         :3,                 /* Computation throughput QoS level */

	    tep_tal_engaged         :1,                 /* TAL mode is in effect */
	    tep_watchers_bg         :1,                 /* watchers are BG-ed */
	    tep_sup_active          :1,                 /* suppression behaviors are in effect */
	    tep_role                :4,                 /* task's system role */
	    tep_suppressed_cpu      :1,                 /* cpu priority == MAXPRI_SUPPRESSED (trumped by lowpri_cpu) */
	    tep_sfi_managed         :1,                 /* SFI Managed task */
	    tep_live_donor          :1,                 /* task is a live importance boost donor */
	    tep_qos_clamp           :3,                 /* task qos clamp (applies to qos-disabled threads too) */
	    tep_qos_ceiling         :3,                 /* task qos ceiling (applies to only qos-participating threads) */
	    tep_adaptive_bg         :1,                 /* task is bg solely due to the adaptive daemon clamp */

	    tep_reserved            :30;
};

#endif /* PRIVATE */

#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 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 tps_requested_policy;
	uint64_t tps_effective_policy;
};

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 /* unused */
#define TASK_APPTYPE_DRIVER              7

/* 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
#define TASK_IS_PIDSUSPENDED                 0x00000010

/* 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 /* deprecated */
#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_ */