/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#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
+
+#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_DISPATCH_ASYNCHRONOUS_OVERRIDE are used to
+ * override the QoS of a thread currently draining a serial dispatch
+ * queue, so that it can get to a block of higher QoS than its
+ * predecessors. The override is applied by a thread enqueueing work
+ * with resource=&queue, and reset by the thread that was overriden
+ * once it has drained the queue. Since the ++ and reset are
+ * asynchronous, there is the possibility of a ++ after the target
+ * thread has issued a reset, in which case the workqueue thread may
+ * issue a reset-all in its outermost scope before deciding whether it
+ * should return to dequeueing work from the global concurrent queues,
+ * or return to the kernel.
+ *
+ * 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_DISPATCH_ASYNCHRONOUS_OVERRIDE (4)
+#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 4
+
+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_ipc_override :3, /* thread qos class from ipc override */
+ thrp_terminated :1, /* heading for termination */
+ thrp_qos_sync_ipc_override:3, /* thread qos class from sync ipc override */
+
+ thrp_reserved :29;
+};
+
+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;
+};
+
+#endif /* PRIVATE */
+
+
#endif /* _MACH_THREAD_POLICY_H_ */
projects / apple / xnu.git / blobdiff