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[apple/xnu.git] / osfmk / mach / thread_policy.h
index ef8c3bf770b80c5e124ea8e7d9e6a90f97a5b730..b0c82bdc5500f961e033f626e82dbaf5af8685e9 100644 (file)
@@ -1,17 +1,20 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 
  * 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
+ * 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,
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-/*
- * Copyright (c) 2000 Apple Computer, Inc.  All rights reserved.
- *
- * HISTORY
  *
- * 10 October 2000 (debo)
- *  Created.
- *
- * 30 November 2000 (debo)
- *     Final resolution of review feedback.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
 #ifndef _MACH_THREAD_POLICY_H_
  * and the default ones are being returned instead.
  */
 
-typedef natural_t      thread_policy_flavor_t;
-typedef integer_t      *thread_policy_t;
+typedef natural_t       thread_policy_flavor_t;
+typedef integer_t       *thread_policy_t;
 
 /*
-kern_return_t  thread_policy_set(
                                      thread_act_t                            thread,
                                      thread_policy_flavor_t          flavor,
                                      thread_policy_t                         policy_info,
                                      mach_msg_type_number_t          count);
-
-kern_return_t  thread_policy_get(
                                      thread_act_t                            thread,
                                      thread_policy_flavor_t          flavor,
                                      thread_policy_t                         policy_info,
                                      mach_msg_type_number_t          *count,
                                      boolean_t                                       *get_default);
-*/
+ *  kern_return_t      thread_policy_set(
*                                       thread_t                                      thread,
*                                       thread_policy_flavor_t                flavor,
*                                       thread_policy_t                               policy_info,
*                                       mach_msg_type_number_t                count);
+ *
+ *  kern_return_t      thread_policy_get(
*                                       thread_t                                      thread,
*                                       thread_policy_flavor_t                flavor,
*                                       thread_policy_t                               policy_info,
*                                       mach_msg_type_number_t                *count,
*                                       boolean_t                                     *get_default);
+ */
 
 /*
  * Defined flavors.
@@ -89,16 +81,16 @@ kern_return_t       thread_policy_get(
  *     [none]
  */
 
-#define THREAD_STANDARD_POLICY                 1
+#define THREAD_STANDARD_POLICY                  1
 
 struct thread_standard_policy {
-       natural_t               no_data;
+       natural_t               no_data;
 };
 
-typedef struct thread_standard_policy  thread_standard_policy_data_t;
-typedef struct thread_standard_policy  *thread_standard_policy_t;
+typedef struct thread_standard_policy   thread_standard_policy_data_t;
+typedef struct thread_standard_policy   *thread_standard_policy_t;
 
-#define THREAD_STANDARD_POLICY_COUNT   0
+#define THREAD_STANDARD_POLICY_COUNT    0
 
 /*
  * THREAD_EXTENDED_POLICY:
@@ -112,17 +104,17 @@ typedef struct thread_standard_policy     *thread_standard_policy_t;
  * behavior as THREAD_STANDARD_POLICY.
  */
 
-#define THREAD_EXTENDED_POLICY                 1
+#define THREAD_EXTENDED_POLICY                  1
 
 struct thread_extended_policy {
-       boolean_t               timeshare;
+       boolean_t               timeshare;
 };
 
-typedef struct thread_extended_policy  thread_extended_policy_data_t;
-typedef struct thread_extended_policy  *thread_extended_policy_t;
+typedef struct thread_extended_policy   thread_extended_policy_data_t;
+typedef struct thread_extended_policy   *thread_extended_policy_t;
 
-#define THREAD_EXTENDED_POLICY_COUNT   \
-       (sizeof (thread_extended_policy_data_t) / sizeof (integer_t))
+#define THREAD_EXTENDED_POLICY_COUNT    ((mach_msg_type_number_t) \
+       (sizeof (thread_extended_policy_data_t) / sizeof (integer_t)))
 
 /*
  * THREAD_TIME_CONSTRAINT_POLICY:
@@ -151,22 +143,22 @@ typedef struct thread_extended_policy     *thread_extended_policy_t;
  * interrupted, subject to the constraint specified above.
  */
 
-#define THREAD_TIME_CONSTRAINT_POLICY  2
+#define THREAD_TIME_CONSTRAINT_POLICY   2
 
 struct thread_time_constraint_policy {
-       uint32_t                period;
-       uint32_t                computation;
-       uint32_t                constraint;
-       boolean_t               preemptible;
+       uint32_t                period;
+       uint32_t                computation;
+       uint32_t                constraint;
+       boolean_t               preemptible;
 };
 
-typedef struct thread_time_constraint_policy   \
-                                                                       thread_time_constraint_policy_data_t;
-typedef struct thread_time_constraint_policy   \
-                                                                       *thread_time_constraint_policy_t;
+typedef struct thread_time_constraint_policy    \
+        thread_time_constraint_policy_data_t;
+typedef struct thread_time_constraint_policy    \
+        *thread_time_constraint_policy_t;
 
-#define THREAD_TIME_CONSTRAINT_POLICY_COUNT    \
-       (sizeof (thread_time_constraint_policy_data_t) / sizeof (integer_t))
+#define THREAD_TIME_CONSTRAINT_POLICY_COUNT     ((mach_msg_type_number_t) \
+       (sizeof (thread_time_constraint_policy_data_t) / sizeof (integer_t)))
 
 /*
  * THREAD_PRECEDENCE_POLICY:
@@ -179,16 +171,256 @@ typedef struct thread_time_constraint_policy     \
  * importance: The importance is specified as a signed value.
  */
 
-#define THREAD_PRECEDENCE_POLICY               3
+#define THREAD_PRECEDENCE_POLICY                3
 
 struct thread_precedence_policy {
-       integer_t               importance;
+       integer_t               importance;
+};
+
+typedef struct thread_precedence_policy         thread_precedence_policy_data_t;
+typedef struct thread_precedence_policy         *thread_precedence_policy_t;
+
+#define THREAD_PRECEDENCE_POLICY_COUNT  ((mach_msg_type_number_t) \
+       (sizeof (thread_precedence_policy_data_t) / sizeof (integer_t)))
+
+/*
+ * THREAD_AFFINITY_POLICY:
+ *
+ * This policy is experimental.
+ * This may be used to express affinity relationships
+ * between threads in the task. Threads with the same affinity tag will
+ * be scheduled to share an L2 cache if possible. That is, affinity tags
+ * are a hint to the scheduler for thread placement.
+ *
+ * The namespace of affinity tags is generally local to one task. However,
+ * a child task created after the assignment of affinity tags by its parent
+ * will share that namespace. In particular, a family of forked processes
+ * may be created with a shared affinity namespace.
+ *
+ * Parameters:
+ * tag: The affinity set identifier.
+ */
+
+#define THREAD_AFFINITY_POLICY          4
+
+struct thread_affinity_policy {
+       integer_t       affinity_tag;
+};
+
+#define THREAD_AFFINITY_TAG_NULL                0
+
+typedef struct thread_affinity_policy           thread_affinity_policy_data_t;
+typedef struct thread_affinity_policy           *thread_affinity_policy_t;
+
+#define THREAD_AFFINITY_POLICY_COUNT    ((mach_msg_type_number_t) \
+       (sizeof (thread_affinity_policy_data_t) / sizeof (integer_t)))
+
+/*
+ * THREAD_BACKGROUND_POLICY:
+ */
+
+#define THREAD_BACKGROUND_POLICY        5
+
+struct thread_background_policy {
+       integer_t       priority;
+};
+
+#define THREAD_BACKGROUND_POLICY_DARWIN_BG 0x1000
+
+typedef struct thread_background_policy         thread_background_policy_data_t;
+typedef struct thread_background_policy         *thread_background_policy_t;
+
+#define THREAD_BACKGROUND_POLICY_COUNT  ((mach_msg_type_number_t) \
+       (sizeof (thread_background_policy_data_t) / sizeof (integer_t)))
+
+
+#define THREAD_LATENCY_QOS_POLICY       7
+typedef integer_t       thread_latency_qos_t;
+
+struct thread_latency_qos_policy {
+       thread_latency_qos_t thread_latency_qos_tier;
+};
+
+typedef struct thread_latency_qos_policy        thread_latency_qos_policy_data_t;
+typedef struct thread_latency_qos_policy        *thread_latency_qos_policy_t;
+
+#define THREAD_LATENCY_QOS_POLICY_COUNT ((mach_msg_type_number_t)       \
+           (sizeof (thread_latency_qos_policy_data_t) / sizeof (integer_t)))
+
+#define THREAD_THROUGHPUT_QOS_POLICY    8
+typedef integer_t       thread_throughput_qos_t;
+
+struct thread_throughput_qos_policy {
+       thread_throughput_qos_t thread_throughput_qos_tier;
+};
+
+typedef struct thread_throughput_qos_policy     thread_throughput_qos_policy_data_t;
+typedef struct thread_throughput_qos_policy     *thread_throughput_qos_policy_t;
+
+#define THREAD_THROUGHPUT_QOS_POLICY_COUNT      ((mach_msg_type_number_t) \
+           (sizeof (thread_throughput_qos_policy_data_t) / sizeof (integer_t)))
+
+#ifdef PRIVATE
+
+/*
+ * THREAD_POLICY_STATE:
+ */
+#define THREAD_POLICY_STATE             6
+
+#define THREAD_POLICY_STATE_FLAG_STATIC_PARAM   0x1
+
+struct thread_policy_state {
+       integer_t requested;
+       integer_t effective;
+       integer_t pending;
+       integer_t flags;
+       uint64_t thps_requested_policy;
+       uint64_t thps_effective_policy;
+       uint32_t thps_user_promotions;
+       uint32_t thps_user_promotion_basepri;
+       uint32_t thps_ipc_overrides;
+       uint32_t reserved32;
+       uint64_t reserved[2];
+};
+
+typedef struct thread_policy_state              thread_policy_state_data_t;
+typedef struct thread_policy_state              *thread_policy_state_t;
+
+#define THREAD_POLICY_STATE_COUNT       ((mach_msg_type_number_t) \
+       (sizeof (thread_policy_state_data_t) / sizeof (integer_t)))
+
+/*
+ * THREAD_QOS_POLICY:
+ */
+#define THREAD_QOS_POLICY               9
+#define THREAD_QOS_POLICY_OVERRIDE      10
+
+typedef uint8_t thread_qos_t;
+#define THREAD_QOS_UNSPECIFIED          0
+#define THREAD_QOS_DEFAULT              THREAD_QOS_UNSPECIFIED  /* Temporary rename */
+#define THREAD_QOS_MAINTENANCE          1
+#define THREAD_QOS_BACKGROUND           2
+#define THREAD_QOS_UTILITY              3
+#define THREAD_QOS_LEGACY               4       /* i.e. default workq threads */
+#define THREAD_QOS_USER_INITIATED       5
+#define THREAD_QOS_USER_INTERACTIVE     6
+
+#define THREAD_QOS_LAST                 7
+
+#define THREAD_QOS_MIN_TIER_IMPORTANCE  (-15)
+
+/*
+ * Overrides are inputs to the task/thread policy engine that
+ * temporarily elevate the effective QoS of a thread without changing
+ * its steady-state (and round-trip-able) requested QoS. The
+ * interfaces into the kernel allow the caller to associate a resource
+ * and type that describe the reason/lifecycle of the override. For
+ * instance, a contended pthread_mutex_t held by a UTILITY thread
+ * might get an override to USER_INTERACTIVE, with the resource
+ * being the userspace address of the pthread_mutex_t. When the
+ * owning thread releases that resource, it can call into the
+ * task policy subsystem to drop the override because of that resource,
+ * although if more contended locks are held by the thread, the
+ * effective QoS may remain overridden for longer.
+ *
+ * THREAD_QOS_OVERRIDE_TYPE_PTHREAD_MUTEX is used for contended
+ * pthread_mutex_t's via the pthread kext. The holder gets an override
+ * with resource=&mutex and a count of 1 by the initial contender.
+ * Subsequent contenders raise the QoS value, until the holder
+ * decrements the count to 0 and the override is released.
+ *
+ * THREAD_QOS_OVERRIDE_TYPE_PTHREAD_RWLOCK is unimplemented and has no
+ * specified semantics.
+ *
+ * THREAD_QOS_OVERRIDE_TYPE_PTHREAD_EXPLICIT_OVERRIDE are explicitly
+ * paired start/end overrides on a target thread. The resource can
+ * either be a memory allocation in userspace, or the pthread_t of the
+ * overrider if no allocation was used.
+ *
+ * THREAD_QOS_OVERRIDE_TYPE_WILDCARD is a catch-all which will reset every
+ * resource matching the resource value.  Passing
+ * THREAD_QOS_OVERRIDE_RESOURCE_WILDCARD as well will reset everything.
+ */
+
+#define THREAD_QOS_OVERRIDE_TYPE_UNKNOWN                        (0)
+#define THREAD_QOS_OVERRIDE_TYPE_PTHREAD_MUTEX                  (1)
+#define THREAD_QOS_OVERRIDE_TYPE_PTHREAD_RWLOCK                 (2)
+#define THREAD_QOS_OVERRIDE_TYPE_PTHREAD_EXPLICIT_OVERRIDE      (3)
+#define THREAD_QOS_OVERRIDE_TYPE_WILDCARD                       (5)
+
+/* A special resource value to indicate a resource wildcard */
+#define THREAD_QOS_OVERRIDE_RESOURCE_WILDCARD (~((user_addr_t)0))
+
+struct thread_qos_policy {
+       integer_t qos_tier;
+       integer_t tier_importance;
+};
+
+typedef struct thread_qos_policy       thread_qos_policy_data_t;
+typedef struct thread_qos_policy      *thread_qos_policy_t;
+
+#define THREAD_QOS_POLICY_COUNT    ((mach_msg_type_number_t) \
+       (sizeof (thread_qos_policy_data_t) / sizeof (integer_t)))
+
+#endif /* PRIVATE */
+
+#ifdef PRIVATE
+
+/*
+ * Internal bitfields are privately exported for revlocked tracing tools like msa to decode tracepoints.
+ *
+ * These struct definitions *will* change in the future.
+ * When they do, we will update THREAD_POLICY_INTERNAL_STRUCT_VERSION.
+ */
+
+#define THREAD_POLICY_INTERNAL_STRUCT_VERSION 5
+
+// legacy names
+#define thrp_qos_ipc_override   thrp_qos_kevent_override
+
+struct thread_requested_policy {
+       uint64_t        thrp_int_darwinbg       :1,     /* marked as darwinbg via setpriority */
+           thrp_ext_darwinbg       :1,
+           thrp_int_iotier         :2,                 /* IO throttle tier */
+           thrp_ext_iotier         :2,
+           thrp_int_iopassive      :1,                 /* should IOs cause lower tiers to be throttled */
+           thrp_ext_iopassive      :1,
+           thrp_latency_qos        :3,                 /* Timer latency QoS */
+           thrp_through_qos        :3,                 /* Computation throughput QoS */
+
+           thrp_pidbind_bg         :1,                 /* task i'm bound to is marked 'watchbg' */
+           thrp_qos                :3,                 /* thread qos class */
+           thrp_qos_relprio        :4,                 /* thread qos relative priority (store as inverse, -10 -> 0xA) */
+           thrp_qos_override       :3,                 /* thread qos class override */
+           thrp_qos_promote        :3,                 /* thread qos class from promotion */
+           thrp_qos_kevent_override:3,                 /* thread qos class from kevent override */
+           thrp_terminated         :1,                 /* heading for termination */
+           thrp_qos_sync_ipc_override:3,               /* now unused */
+           thrp_qos_workq_override :3,                 /* thread qos class override (workq) */
+           thrp_qos_wlsvc_override :3,                 /* workloop servicer qos class override */
+
+           thrp_reserved           :23;
+};
+
+struct thread_effective_policy {
+       uint64_t        thep_darwinbg           :1,     /* marked as 'background', and sockets are marked bg when created */
+           thep_io_tier            :2,                 /* effective throttle tier */
+           thep_io_passive         :1,                 /* should IOs cause lower tiers to be throttled */
+           thep_all_sockets_bg     :1,                 /* All existing sockets in process are marked as bg (thread: all created by thread) */
+           thep_new_sockets_bg     :1,                 /* Newly created sockets should be marked as bg */
+           thep_terminated         :1,                 /* all throttles have been removed for quick exit or SIGTERM handling */
+           thep_qos_ui_is_urgent   :1,                 /* bump UI-Interactive QoS up to the urgent preemption band */
+           thep_latency_qos        :3,                 /* Timer latency QoS level */
+           thep_through_qos        :3,                 /* Computation throughput QoS level */
+
+           thep_qos                :3,                 /* thread qos class */
+           thep_qos_relprio        :4,                 /* thread qos relative priority (store as inverse, -10 -> 0xA) */
+           thep_qos_promote        :3,                 /* thread qos class used for promotion */
+
+           thep_reserved           :40;
 };
 
-typedef struct thread_precedence_policy                thread_precedence_policy_data_t;
-typedef struct thread_precedence_policy                *thread_precedence_policy_t;
+#endif /* PRIVATE */
 
-#define THREAD_PRECEDENCE_POLICY_COUNT \
-       (sizeof (thread_precedence_policy_data_t) / sizeof (integer_t))
 
-#endif /* _MACH_THREAD_POLICY_H_ */
+#endif  /* _MACH_THREAD_POLICY_H_ */