#include <mach/mach_types.h>
#include <kern/ast.h>
#include <kern/cpu_number.h>
+#include <kern/smp.h>
#include <kern/simple_lock.h>
#include <kern/locks.h>
#include <kern/queue.h>
#include <kern/sched.h>
#include <mach/sfi_class.h>
#include <kern/processor_data.h>
+#include <kern/cpu_quiesce.h>
-#include <machine/ast_types.h>
+/*
+ * Processor state is accessed by locking the scheduling lock
+ * for the assigned processor set.
+ *
+ * -------------------- SHUTDOWN
+ * / ^ ^
+ * _/ | \
+ * OFF_LINE ---> START ---> RUNNING ---> IDLE ---> DISPATCHING
+ * \_________________^ ^ ^______/ /
+ * \__________________/
+ *
+ * Most of these state transitions are externally driven as a
+ * a directive (for instance telling an IDLE processor to start
+ * coming out of the idle state to run a thread). However these
+ * are typically paired with a handshake by the processor itself
+ * to indicate that it has completed a transition of indeterminate
+ * length (for example, the DISPATCHING->RUNNING or START->RUNNING
+ * transitions must occur on the processor itself).
+ *
+ * The boot processor has some special cases, and skips the START state,
+ * since it has already bootstrapped and is ready to context switch threads.
+ *
+ * When a processor is in DISPATCHING or RUNNING state, the current_pri,
+ * current_thmode, and deadline fields should be set, so that other
+ * processors can evaluate if it is an appropriate candidate for preemption.
+ */
+#if defined(CONFIG_SCHED_DEFERRED_AST)
+/*
+ * -------------------- SHUTDOWN
+ * / ^ ^
+ * _/ | \
+ * OFF_LINE ---> START ---> RUNNING ---> IDLE ---> DISPATCHING
+ * \_________________^ ^ ^______/ ^_____ / /
+ * \__________________/
+ *
+ * A DISPATCHING processor may be put back into IDLE, if another
+ * processor determines that the target processor will have nothing to do
+ * upon reaching the RUNNING state. This is racy, but if the target
+ * responds and becomes RUNNING, it will not break the processor state
+ * machine.
+ *
+ * This change allows us to cancel an outstanding signal/AST on a processor
+ * (if such an operation is supported through hardware or software), and
+ * push the processor back into the IDLE state as a power optimization.
+ */
+#endif
-struct processor_set {
- queue_head_t active_queue; /* active processors */
- queue_head_t idle_queue; /* idle processors */
- queue_head_t idle_secondary_queue; /* idle secondary processors */
+#define PROCESSOR_OFF_LINE 0 /* Not available */
+#define PROCESSOR_SHUTDOWN 1 /* Going off-line */
+#define PROCESSOR_START 2 /* Being started */
+/* 3 Formerly Inactive (unavailable) */
+#define PROCESSOR_IDLE 4 /* Idle (available) */
+#define PROCESSOR_DISPATCHING 5 /* Dispatching (idle -> active) */
+#define PROCESSOR_RUNNING 6 /* Normal execution */
+#define PROCESSOR_STATE_LEN (PROCESSOR_RUNNING+1)
- int online_processor_count;
+typedef enum {
+ PSET_SMP,
+} pset_cluster_type_t;
- int cpu_set_low, cpu_set_hi;
- int cpu_set_count;
+typedef bitmap_t cpumap_t;
+struct processor_set {
+ int online_processor_count;
+ int load_average;
+
+ int cpu_set_low, cpu_set_hi;
+ int cpu_set_count;
+ int last_chosen;
+ cpumap_t cpu_bitmask;
+ cpumap_t recommended_bitmask;
+ cpumap_t cpu_state_map[PROCESSOR_STATE_LEN];
+ cpumap_t primary_map;
+
+#if __SMP__
decl_simple_lock_data(,sched_lock) /* lock for above */
+#endif
#if defined(CONFIG_SCHED_TRADITIONAL) || defined(CONFIG_SCHED_MULTIQ)
struct run_queue pset_runq; /* runq for this processor set */
#endif
+ struct rt_queue rt_runq; /* realtime runq for this processor set */
#if defined(CONFIG_SCHED_TRADITIONAL)
int pset_runq_bound_count;
#endif
/* CPUs that have been sent an unacknowledged remote AST for scheduling purposes */
- uint32_t pending_AST_cpu_mask;
+ cpumap_t pending_AST_cpu_mask;
+#if defined(CONFIG_SCHED_DEFERRED_AST)
+ /*
+ * A separate mask, for ASTs that we may be able to cancel. This is dependent on
+ * some level of support for requesting an AST on a processor, and then quashing
+ * that request later.
+ *
+ * The purpose of this field (and the associated codepaths) is to infer when we
+ * no longer need a processor that is DISPATCHING to come up, and to prevent it
+ * from coming out of IDLE if possible. This should serve to decrease the number
+ * of spurious ASTs in the system, and let processors spend longer periods in
+ * IDLE.
+ */
+ cpumap_t pending_deferred_AST_cpu_mask;
+#endif
+ cpumap_t pending_spill_cpu_mask;
struct ipc_port * pset_self; /* port for operations */
struct ipc_port * pset_name_self; /* port for information */
processor_set_t pset_list; /* chain of associated psets */
- pset_node_t node;
+ pset_node_t node;
+ uint32_t pset_cluster_id;
+ pset_cluster_type_t pset_cluster_type;
};
extern struct processor_set pset0;
extern struct pset_node pset_node0;
-extern queue_head_t tasks, terminated_tasks, threads; /* Terminated tasks are ONLY for stackshot */
+extern queue_head_t tasks, terminated_tasks, threads, corpse_tasks; /* Terminated tasks are ONLY for stackshot */
extern int tasks_count, terminated_tasks_count, threads_count;
decl_lck_mtx_data(extern,tasks_threads_lock)
+decl_lck_mtx_data(extern,tasks_corpse_lock)
struct processor {
- queue_chain_t processor_queue;/* idle/active queue link,
- * MUST remain the first element */
- int state; /* See below */
- boolean_t is_SMT;
- struct thread
- *active_thread, /* thread running on processor */
- *next_thread, /* next thread when dispatched */
- *idle_thread; /* this processor's idle thread. */
+ int state; /* See above */
+ bool is_SMT;
+ bool is_recommended;
+ struct thread *active_thread; /* thread running on processor */
+ struct thread *next_thread; /* next thread when dispatched */
+ struct thread *idle_thread; /* this processor's idle thread. */
processor_set_t processor_set; /* assigned set */
- int current_pri; /* priority of current thread */
- sched_mode_t current_thmode; /* sched mode of current thread */
+ int current_pri; /* priority of current thread */
sfi_class_id_t current_sfi_class; /* SFI class of current thread */
- int cpu_id; /* platform numeric id */
+ perfcontrol_class_t current_perfctl_class; /* Perfcontrol class for current thread */
+ int starting_pri; /* priority of current thread as it was when scheduled */
+ pset_cluster_type_t current_recommended_pset_type; /* Cluster type recommended for current thread */
+ int cpu_id; /* platform numeric id */
+ cpu_quiescent_state_t cpu_quiesce_state;
+ uint64_t cpu_quiesce_last_checkin;
timer_call_data_t quantum_timer; /* timer for quantum expiration */
uint64_t quantum_end; /* time when current quantum ends */
uint64_t last_dispatch; /* time of last dispatch */
+ uint64_t kperf_last_sample_time; /* time of last kperf sample */
+
uint64_t deadline; /* current deadline */
- int timeslice; /* quanta before timeslice ends */
+ bool first_timeslice; /* has the quantum expired since context switch */
#if defined(CONFIG_SCHED_TRADITIONAL) || defined(CONFIG_SCHED_MULTIQ)
struct run_queue runq; /* runq for this processor */
};
extern processor_t processor_list;
-extern unsigned int processor_count;
decl_simple_lock_data(extern,processor_list_lock)
+#define MAX_SCHED_CPUS 64 /* Maximum number of CPUs supported by the scheduler. bits.h:bitmap_*() macros need to be used to support greater than 64 */
+extern processor_t processor_array[MAX_SCHED_CPUS]; /* array indexed by cpuid */
+
extern uint32_t processor_avail_count;
extern processor_t master_processor;
extern boolean_t sched_stats_active;
-/*
- * Processor state is accessed by locking the scheduling lock
- * for the assigned processor set.
- *
- * -------------------- SHUTDOWN
- * / ^ ^
- * _/ | \
- * OFF_LINE ---> START ---> RUNNING ---> IDLE ---> DISPATCHING
- * \_________________^ ^ ^______/ /
- * \__________________/
- *
- * Most of these state transitions are externally driven as a
- * a directive (for instance telling an IDLE processor to start
- * coming out of the idle state to run a thread). However these
- * are typically paired with a handshake by the processor itself
- * to indicate that it has completed a transition of indeterminate
- * length (for example, the DISPATCHING->RUNNING or START->RUNNING
- * transitions must occur on the processor itself).
- *
- * The boot processor has some special cases, and skips the START state,
- * since it has already bootstrapped and is ready to context switch threads.
- *
- * When a processor is in DISPATCHING or RUNNING state, the current_pri,
- * current_thmode, and deadline fields should be set, so that other
- * processors can evaluate if it is an appropriate candidate for preemption.
-*/
-#define PROCESSOR_OFF_LINE 0 /* Not available */
-#define PROCESSOR_SHUTDOWN 1 /* Going off-line */
-#define PROCESSOR_START 2 /* Being started */
-/* 3 Formerly Inactive (unavailable) */
-#define PROCESSOR_IDLE 4 /* Idle (available) */
-#define PROCESSOR_DISPATCHING 5 /* Dispatching (idle -> active) */
-#define PROCESSOR_RUNNING 6 /* Normal execution */
-
extern processor_t current_processor(void);
-/* Lock macros */
+/* Lock macros, always acquired and released with interrupts disabled (splsched()) */
+#if __SMP__
#define pset_lock(p) simple_lock(&(p)->sched_lock)
#define pset_unlock(p) simple_unlock(&(p)->sched_lock)
#define pset_lock_init(p) simple_lock_init(&(p)->sched_lock, 0)
+#if defined(__arm__) || defined(__arm64__)
+#define pset_assert_locked(p) LCK_SPIN_ASSERT(&(p)->sched_lock, LCK_ASSERT_OWNED)
+#else
+/* See <rdar://problem/39630910> pset_lock() should be converted to use lck_spin_lock() instead of simple_lock() */
+#define pset_assert_locked(p) do { (void)p; } while(0)
+#endif
+
+#define rt_lock_lock(p) simple_lock(&SCHED(rt_runq)(p)->rt_lock)
+#define rt_lock_unlock(p) simple_unlock(&SCHED(rt_runq)(p)->rt_lock)
+#define rt_lock_init(p) simple_lock_init(&SCHED(rt_runq)(p)->rt_lock, 0)
+#else
+#define pset_lock(p) do { (void)p; } while(0)
+#define pset_unlock(p) do { (void)p; } while(0)
+#define pset_lock_init(p) do { (void)p; } while(0)
+#define pset_assert_locked(p) do { (void)p; } while(0)
+
+#define rt_lock_lock(p) do { (void)p; } while(0)
+#define rt_lock_unlock(p) do { (void)p; } while(0)
+#define rt_lock_init(p) do { (void)p; } while(0)
+#endif
extern void processor_bootstrap(void);
processor_set_t pset,
pset_node_t node);
+extern processor_set_t pset_find(
+ uint32_t cluster_id,
+ processor_set_t default_pset);
+
extern kern_return_t processor_info_count(
processor_flavor_t flavor,
mach_msg_type_number_t *count);
#define next_pset(p) (((p)->pset_list != PROCESSOR_SET_NULL)? (p)->pset_list: (p)->node->psets)
+#define PSET_THING_TASK 0
+#define PSET_THING_THREAD 1
+
+extern kern_return_t processor_set_things(
+ processor_set_t pset,
+ void **thing_list,
+ mach_msg_type_number_t *count,
+ int type);
+
+extern pset_cluster_type_t recommended_pset_type(thread_t thread);
+
+inline static bool
+pset_is_recommended(processor_set_t pset)
+{
+ return ((pset->recommended_bitmask & pset->cpu_bitmask) != 0);
+}
+
+extern void processor_state_update_idle(processor_t processor);
+extern void processor_state_update_from_thread(processor_t processor, thread_t thread);
+extern void processor_state_update_explicit(processor_t processor, int pri,
+ sfi_class_id_t sfi_class, pset_cluster_type_t pset_type,
+ perfcontrol_class_t perfctl_class);
+
+#define PSET_LOAD_NUMERATOR_SHIFT 16
+#define PSET_LOAD_FRACTIONAL_SHIFT 4
+
+inline static int
+sched_get_pset_load_average(processor_set_t pset)
+{
+ return pset->load_average >> (PSET_LOAD_NUMERATOR_SHIFT - PSET_LOAD_FRACTIONAL_SHIFT);
+}
+extern void sched_update_pset_load_average(processor_set_t pset);
+
+inline static void
+pset_update_processor_state(processor_set_t pset, processor_t processor, uint new_state)
+{
+ pset_assert_locked(pset);
+
+ uint old_state = processor->state;
+ uint cpuid = processor->cpu_id;
+
+ assert(processor->processor_set == pset);
+ assert(bit_test(pset->cpu_bitmask, cpuid));
+
+ assert(old_state < PROCESSOR_STATE_LEN);
+ assert(new_state < PROCESSOR_STATE_LEN);
+
+ processor->state = new_state;
+
+ bit_clear(pset->cpu_state_map[old_state], cpuid);
+ bit_set(pset->cpu_state_map[new_state], cpuid);
+
+ if ((old_state == PROCESSOR_RUNNING) || (new_state == PROCESSOR_RUNNING)) {
+ sched_update_pset_load_average(pset);
+ }
+}
+
#else /* MACH_KERNEL_PRIVATE */
__BEGIN_DECLS
#ifdef KERNEL_PRIVATE
__BEGIN_DECLS
+extern unsigned int processor_count;
extern processor_t cpu_to_processor(int cpu);
__END_DECLS
projects / apple / xnu.git / blobdiff