1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <atomic>
#include "common/common_types.h"
#include "core/hle/kernel/global_scheduler_context.h"
#include "core/hle/kernel/k_priority_queue.h"
#include "core/hle/kernel/k_scheduler_lock.h"
#include "core/hle/kernel/k_scoped_lock.h"
#include "core/hle/kernel/k_spin_lock.h"
#include "core/hle/kernel/k_thread.h"
namespace Common {
class Fiber;
}
namespace Core {
class System;
}
namespace Kernel {
class KernelCore;
class KInterruptTaskManager;
class KProcess;
class KThread;
class KScopedDisableDispatch;
class KScopedSchedulerLock;
class KScopedSchedulerLockAndSleep;
class KScheduler final {
public:
YUZU_NON_COPYABLE(KScheduler);
YUZU_NON_MOVEABLE(KScheduler);
using LockType = KAbstractSchedulerLock<KScheduler>;
explicit KScheduler(KernelCore& kernel);
~KScheduler();
void Initialize(KThread* main_thread, KThread* idle_thread, s32 core_id);
void Activate();
void OnThreadStart();
void Unload(KThread* thread);
void Reload(KThread* thread);
void SetInterruptTaskRunnable();
void RequestScheduleOnInterrupt();
void PreemptSingleCore();
u64 GetIdleCount() {
return m_state.idle_count;
}
KThread* GetIdleThread() const {
return m_idle_thread;
}
bool IsIdle() const {
return m_current_thread.load() == m_idle_thread;
}
KThread* GetPreviousThread() const {
return m_state.prev_thread;
}
KThread* GetSchedulerCurrentThread() const {
return m_current_thread.load();
}
s64 GetLastContextSwitchTime() const {
return m_last_context_switch_time;
}
// Static public API.
static bool CanSchedule(KernelCore& kernel) {
return GetCurrentThread(kernel).GetDisableDispatchCount() == 0;
}
static bool IsSchedulerLockedByCurrentThread(KernelCore& kernel) {
return kernel.GlobalSchedulerContext().scheduler_lock.IsLockedByCurrentThread();
}
static bool IsSchedulerUpdateNeeded(KernelCore& kernel) {
return kernel.GlobalSchedulerContext().scheduler_update_needed;
}
static void SetSchedulerUpdateNeeded(KernelCore& kernel) {
kernel.GlobalSchedulerContext().scheduler_update_needed = true;
}
static void ClearSchedulerUpdateNeeded(KernelCore& kernel) {
kernel.GlobalSchedulerContext().scheduler_update_needed = false;
}
static void DisableScheduling(KernelCore& kernel);
static void EnableScheduling(KernelCore& kernel, u64 cores_needing_scheduling);
static u64 UpdateHighestPriorityThreads(KernelCore& kernel);
static void ClearPreviousThread(KernelCore& kernel, KThread* thread);
static void OnThreadStateChanged(KernelCore& kernel, KThread* thread, ThreadState old_state);
static void OnThreadPriorityChanged(KernelCore& kernel, KThread* thread, s32 old_priority);
static void OnThreadAffinityMaskChanged(KernelCore& kernel, KThread* thread,
const KAffinityMask& old_affinity, s32 old_core);
static void RotateScheduledQueue(KernelCore& kernel, s32 core_id, s32 priority);
static void RescheduleCores(KernelCore& kernel, u64 cores_needing_scheduling);
static void YieldWithoutCoreMigration(KernelCore& kernel);
static void YieldWithCoreMigration(KernelCore& kernel);
static void YieldToAnyThread(KernelCore& kernel);
private:
// Static private API.
static KSchedulerPriorityQueue& GetPriorityQueue(KernelCore& kernel) {
return kernel.GlobalSchedulerContext().priority_queue;
}
static u64 UpdateHighestPriorityThreadsImpl(KernelCore& kernel);
// Instanced private API.
void ScheduleImpl();
void ScheduleImplFiber();
void SwitchThread(KThread* next_thread);
void Schedule();
void ScheduleOnInterrupt();
void RescheduleOtherCores(u64 cores_needing_scheduling);
void RescheduleCurrentCore();
void RescheduleCurrentCoreImpl();
u64 UpdateHighestPriorityThread(KThread* thread);
private:
friend class KScopedDisableDispatch;
struct SchedulingState {
std::atomic<bool> needs_scheduling{false};
bool interrupt_task_runnable{false};
bool should_count_idle{false};
u64 idle_count{0};
KThread* highest_priority_thread{nullptr};
void* idle_thread_stack{nullptr};
std::atomic<KThread*> prev_thread{nullptr};
KInterruptTaskManager* interrupt_task_manager{nullptr};
};
KernelCore& kernel;
SchedulingState m_state;
bool m_is_active{false};
s32 m_core_id{0};
s64 m_last_context_switch_time{0};
KThread* m_idle_thread{nullptr};
std::atomic<KThread*> m_current_thread{nullptr};
std::shared_ptr<Common::Fiber> m_switch_fiber{};
KThread* m_switch_cur_thread{};
KThread* m_switch_highest_priority_thread{};
bool m_switch_from_schedule{};
};
class KScopedSchedulerLock : public KScopedLock<KScheduler::LockType> {
public:
explicit KScopedSchedulerLock(KernelCore& kernel)
: KScopedLock(kernel.GlobalSchedulerContext().scheduler_lock) {}
~KScopedSchedulerLock() = default;
};
} // namespace Kernel
|
