diff --git a/src/common/fiber.cpp b/src/common/fiber.cpp
index f97ad433b..1c1d09ccb 100644
--- a/src/common/fiber.cpp
+++ b/src/common/fiber.cpp
@@ -54,9 +54,7 @@ Fiber::Fiber(std::function<void(void*)>&& entry_point_func, void* start_paramete
     impl->handle = CreateFiber(default_stack_size, &FiberStartFunc, this);
 }
 
-Fiber::Fiber() {
-    impl = std::make_unique<FiberImpl>();
-}
+Fiber::Fiber() : impl{std::make_unique<FiberImpl>()} {}
 
 Fiber::~Fiber() {
     if (released) {
@@ -116,8 +114,8 @@ std::shared_ptr<Fiber> Fiber::ThreadToFiber() {
 
 struct Fiber::FiberImpl {
     alignas(64) std::array<u8, default_stack_size> stack;
-    u8* stack_limit;
     alignas(64) std::array<u8, default_stack_size> rewind_stack;
+    u8* stack_limit;
     u8* rewind_stack_limit;
     boost::context::detail::fcontext_t context;
     boost::context::detail::fcontext_t rewind_context;
@@ -168,9 +166,7 @@ void Fiber::SetRewindPoint(std::function<void(void*)>&& rewind_func, void* start
     rewind_parameter = start_parameter;
 }
 
-Fiber::Fiber() {
-    impl = std::make_unique<FiberImpl>();
-}
+Fiber::Fiber() : impl{std::make_unique<FiberImpl>()} {}
 
 Fiber::~Fiber() {
     if (released) {
diff --git a/src/common/spin_lock.cpp b/src/common/spin_lock.cpp
index c7b46aac6..c1524220f 100644
--- a/src/common/spin_lock.cpp
+++ b/src/common/spin_lock.cpp
@@ -20,7 +20,7 @@
 
 namespace {
 
-void thread_pause() {
+void ThreadPause() {
 #if __x86_64__
     _mm_pause();
 #elif __aarch64__ && _MSC_VER
@@ -30,13 +30,13 @@ void thread_pause() {
 #endif
 }
 
-} // namespace
+} // Anonymous namespace
 
 namespace Common {
 
 void SpinLock::lock() {
     while (lck.test_and_set(std::memory_order_acquire)) {
-        thread_pause();
+        ThreadPause();
     }
 }
 
diff --git a/src/common/spin_lock.h b/src/common/spin_lock.h
index 70282a961..1df5528c4 100644
--- a/src/common/spin_lock.h
+++ b/src/common/spin_lock.h
@@ -8,6 +8,11 @@
 
 namespace Common {
 
+/**
+ * SpinLock class
+ * a lock similar to mutex that forces a thread to spin wait instead calling the
+ * supervisor. Should be used on short sequences of code.
+ */
 class SpinLock {
 public:
     void lock();
diff --git a/src/common/x64/native_clock.cpp b/src/common/x64/native_clock.cpp
index f1bc60fd2..424b39b1f 100644
--- a/src/common/x64/native_clock.cpp
+++ b/src/common/x64/native_clock.cpp
@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <chrono>
+#include <mutex>
 #include <thread>
 
 #ifdef _MSC_VER
@@ -52,7 +53,7 @@ NativeClock::NativeClock(u64 emulated_cpu_frequency, u64 emulated_clock_frequenc
 }
 
 u64 NativeClock::GetRTSC() {
-    rtsc_serialize.lock();
+    std::scoped_lock scope{rtsc_serialize};
     _mm_mfence();
     const u64 current_measure = __rdtsc();
     u64 diff = current_measure - last_measure;
@@ -61,7 +62,6 @@ u64 NativeClock::GetRTSC() {
         last_measure = current_measure;
     }
     accumulated_ticks += diff;
-    rtsc_serialize.unlock();
     /// The clock cannot be more precise than the guest timer, remove the lower bits
     return accumulated_ticks & inaccuracy_mask;
 }
diff --git a/src/core/arm/arm_interface.h b/src/core/arm/arm_interface.h
index 0c1d6ac39..1f24051e4 100644
--- a/src/core/arm/arm_interface.h
+++ b/src/core/arm/arm_interface.h
@@ -148,7 +148,7 @@ public:
      */
     virtual void SetTPIDR_EL0(u64 value) = 0;
 
-    virtual void ChangeProcessorId(std::size_t new_core_id) = 0;
+    virtual void ChangeProcessorID(std::size_t new_core_id) = 0;
 
     virtual void SaveContext(ThreadContext32& ctx) = 0;
     virtual void SaveContext(ThreadContext64& ctx) = 0;
diff --git a/src/core/arm/cpu_interrupt_handler.h b/src/core/arm/cpu_interrupt_handler.h
index 91c31a271..3d062d326 100644
--- a/src/core/arm/cpu_interrupt_handler.h
+++ b/src/core/arm/cpu_interrupt_handler.h
@@ -23,7 +23,7 @@ public:
     CPUInterruptHandler(CPUInterruptHandler&&) = default;
     CPUInterruptHandler& operator=(CPUInterruptHandler&&) = default;
 
-    constexpr bool IsInterrupted() const {
+    bool IsInterrupted() const {
         return is_interrupted;
     }
 
diff --git a/src/core/arm/dynarmic/arm_dynarmic_32.cpp b/src/core/arm/dynarmic/arm_dynarmic_32.cpp
index cfda12098..0d4ab95b7 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_32.cpp
+++ b/src/core/arm/dynarmic/arm_dynarmic_32.cpp
@@ -107,7 +107,7 @@ public:
     u64 GetTicksRemaining() override {
         if (parent.uses_wall_clock) {
             if (!parent.interrupt_handlers[parent.core_index].IsInterrupted()) {
-                return 1000U;
+                return minimum_run_cycles;
             }
             return 0U;
         }
@@ -116,6 +116,7 @@ public:
 
     ARM_Dynarmic_32& parent;
     std::size_t num_interpreted_instructions{};
+    static constexpr u64 minimum_run_cycles = 1000U;
 };
 
 std::shared_ptr<Dynarmic::A32::Jit> ARM_Dynarmic_32::MakeJit(Common::PageTable& page_table,
@@ -214,7 +215,7 @@ void ARM_Dynarmic_32::SetTPIDR_EL0(u64 value) {
     cp15->uprw = static_cast<u32>(value);
 }
 
-void ARM_Dynarmic_32::ChangeProcessorId(std::size_t new_core_id) {
+void ARM_Dynarmic_32::ChangeProcessorID(std::size_t new_core_id) {
     jit->ChangeProcessorID(new_core_id);
 }
 
diff --git a/src/core/arm/dynarmic/arm_dynarmic_32.h b/src/core/arm/dynarmic/arm_dynarmic_32.h
index d9c0bfede..2bab31b92 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_32.h
+++ b/src/core/arm/dynarmic/arm_dynarmic_32.h
@@ -47,7 +47,7 @@ public:
     void SetTlsAddress(VAddr address) override;
     void SetTPIDR_EL0(u64 value) override;
     u64 GetTPIDR_EL0() const override;
-    void ChangeProcessorId(std::size_t new_core_id) override;
+    void ChangeProcessorID(std::size_t new_core_id) override;
 
     void SaveContext(ThreadContext32& ctx) override;
     void SaveContext(ThreadContext64& ctx) override {}
diff --git a/src/core/arm/dynarmic/arm_dynarmic_64.cpp b/src/core/arm/dynarmic/arm_dynarmic_64.cpp
index 35a99e28a..790981034 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_64.cpp
+++ b/src/core/arm/dynarmic/arm_dynarmic_64.cpp
@@ -144,7 +144,7 @@ public:
     u64 GetTicksRemaining() override {
         if (parent.uses_wall_clock) {
             if (!parent.interrupt_handlers[parent.core_index].IsInterrupted()) {
-                return 1000U;
+                return minimum_run_cycles;
             }
             return 0U;
         }
@@ -159,6 +159,7 @@ public:
     std::size_t num_interpreted_instructions = 0;
     u64 tpidrro_el0 = 0;
     u64 tpidr_el0 = 0;
+    static constexpr u64 minimum_run_cycles = 1000U;
 };
 
 std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable& page_table,
@@ -271,7 +272,7 @@ void ARM_Dynarmic_64::SetTPIDR_EL0(u64 value) {
     cb->tpidr_el0 = value;
 }
 
-void ARM_Dynarmic_64::ChangeProcessorId(std::size_t new_core_id) {
+void ARM_Dynarmic_64::ChangeProcessorID(std::size_t new_core_id) {
     jit->ChangeProcessorID(new_core_id);
 }
 
diff --git a/src/core/arm/dynarmic/arm_dynarmic_64.h b/src/core/arm/dynarmic/arm_dynarmic_64.h
index c74fcbcea..403c55961 100644
--- a/src/core/arm/dynarmic/arm_dynarmic_64.h
+++ b/src/core/arm/dynarmic/arm_dynarmic_64.h
@@ -45,7 +45,7 @@ public:
     void SetTlsAddress(VAddr address) override;
     void SetTPIDR_EL0(u64 value) override;
     u64 GetTPIDR_EL0() const override;
-    void ChangeProcessorId(std::size_t new_core_id) override;
+    void ChangeProcessorID(std::size_t new_core_id) override;
 
     void SaveContext(ThreadContext32& ctx) override {}
     void SaveContext(ThreadContext64& ctx) override;
diff --git a/src/core/arm/unicorn/arm_unicorn.cpp b/src/core/arm/unicorn/arm_unicorn.cpp
index 35e8f42e8..1df3f3ed1 100644
--- a/src/core/arm/unicorn/arm_unicorn.cpp
+++ b/src/core/arm/unicorn/arm_unicorn.cpp
@@ -159,7 +159,7 @@ void ARM_Unicorn::SetTPIDR_EL0(u64 value) {
     CHECKED(uc_reg_write(uc, UC_ARM64_REG_TPIDR_EL0, &value));
 }
 
-void ARM_Unicorn::ChangeProcessorId(std::size_t new_core_id) {
+void ARM_Unicorn::ChangeProcessorID(std::size_t new_core_id) {
     core_index = new_core_id;
 }
 
diff --git a/src/core/arm/unicorn/arm_unicorn.h b/src/core/arm/unicorn/arm_unicorn.h
index 8ace8b86f..810aff311 100644
--- a/src/core/arm/unicorn/arm_unicorn.h
+++ b/src/core/arm/unicorn/arm_unicorn.h
@@ -36,7 +36,7 @@ public:
     void SetTlsAddress(VAddr address) override;
     void SetTPIDR_EL0(u64 value) override;
     u64 GetTPIDR_EL0() const override;
-    void ChangeProcessorId(std::size_t new_core_id) override;
+    void ChangeProcessorID(std::size_t new_core_id) override;
     void PrepareReschedule() override;
     void ClearExclusiveState() override;
     void ExecuteInstructions(std::size_t num_instructions);
diff --git a/src/core/core.cpp b/src/core/core.cpp
index 8256ec0fc..1a243c515 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -443,7 +443,7 @@ bool System::IsPoweredOn() const {
 }
 
 void System::PrepareReschedule() {
-    // impl->CurrentPhysicalCore().Stop();
+    // Deprecated, does nothing, kept for backward compatibility.
 }
 
 void System::PrepareReschedule(const u32 core_index) {
diff --git a/src/core/core.h b/src/core/core.h
index 133ecb8e1..5c6cfbffe 100644
--- a/src/core/core.h
+++ b/src/core/core.h
@@ -138,13 +138,13 @@ public:
 
     /**
      * Run the OS and Application
-     * This function will start emulation and run the competent devices
+     * This function will start emulation and run the relevant devices
      */
     ResultStatus Run();
 
     /**
      * Pause the OS and Application
-     * This function will pause emulation and stop the competent devices
+     * This function will pause emulation and stop the relevant devices
      */
     ResultStatus Pause();
 
diff --git a/src/core/core_timing.cpp b/src/core/core_timing.cpp
index 1aa89a1cc..5c83c41a4 100644
--- a/src/core/core_timing.cpp
+++ b/src/core/core_timing.cpp
@@ -45,9 +45,9 @@ CoreTiming::CoreTiming() {
 CoreTiming::~CoreTiming() = default;
 
 void CoreTiming::ThreadEntry(CoreTiming& instance) {
-    std::string name = "yuzu:HostTiming";
-    MicroProfileOnThreadCreate(name.c_str());
-    Common::SetCurrentThreadName(name.c_str());
+    constexpr char name[] = "yuzu:HostTiming";
+    MicroProfileOnThreadCreate(name);
+    Common::SetCurrentThreadName(name);
     Common::SetCurrentThreadPriority(Common::ThreadPriority::VeryHigh);
     instance.on_thread_init();
     instance.ThreadLoop();
@@ -108,18 +108,19 @@ bool CoreTiming::HasPendingEvents() const {
 
 void CoreTiming::ScheduleEvent(s64 ns_into_future, const std::shared_ptr<EventType>& event_type,
                                u64 userdata) {
-    basic_lock.lock();
-    const u64 timeout = static_cast<u64>(GetGlobalTimeNs().count() + ns_into_future);
+    {
+        std::scoped_lock scope{basic_lock};
+        const u64 timeout = static_cast<u64>(GetGlobalTimeNs().count() + ns_into_future);
 
-    event_queue.emplace_back(Event{timeout, event_fifo_id++, userdata, event_type});
+        event_queue.emplace_back(Event{timeout, event_fifo_id++, userdata, event_type});
 
-    std::push_heap(event_queue.begin(), event_queue.end(), std::greater<>());
-    basic_lock.unlock();
+        std::push_heap(event_queue.begin(), event_queue.end(), std::greater<>());
+    }
     event.Set();
 }
 
 void CoreTiming::UnscheduleEvent(const std::shared_ptr<EventType>& event_type, u64 userdata) {
-    basic_lock.lock();
+    std::scoped_lock scope{basic_lock};
     const auto itr = std::remove_if(event_queue.begin(), event_queue.end(), [&](const Event& e) {
         return e.type.lock().get() == event_type.get() && e.userdata == userdata;
     });
@@ -129,7 +130,6 @@ void CoreTiming::UnscheduleEvent(const std::shared_ptr<EventType>& event_type, u
         event_queue.erase(itr, event_queue.end());
         std::make_heap(event_queue.begin(), event_queue.end(), std::greater<>());
     }
-    basic_lock.unlock();
 }
 
 void CoreTiming::AddTicks(u64 ticks) {
@@ -187,8 +187,8 @@ void CoreTiming::RemoveEvent(const std::shared_ptr<EventType>& event_type) {
 }
 
 std::optional<s64> CoreTiming::Advance() {
-    advance_lock.lock();
-    basic_lock.lock();
+    std::scoped_lock advance_scope{advance_lock};
+    std::scoped_lock basic_scope{basic_lock};
     global_timer = GetGlobalTimeNs().count();
 
     while (!event_queue.empty() && event_queue.front().time <= global_timer) {
@@ -207,12 +207,8 @@ std::optional<s64> CoreTiming::Advance() {
 
     if (!event_queue.empty()) {
         const s64 next_time = event_queue.front().time - global_timer;
-        basic_lock.unlock();
-        advance_lock.unlock();
         return next_time;
     } else {
-        basic_lock.unlock();
-        advance_lock.unlock();
         return std::nullopt;
     }
 }
diff --git a/src/core/hle/kernel/kernel.cpp b/src/core/hle/kernel/kernel.cpp
index dbb75416d..1f2af7a1b 100644
--- a/src/core/hle/kernel/kernel.cpp
+++ b/src/core/hle/kernel/kernel.cpp
@@ -472,16 +472,12 @@ const Core::ExclusiveMonitor& KernelCore::GetExclusiveMonitor() const {
 }
 
 void KernelCore::InvalidateAllInstructionCaches() {
-    if (!IsMulticore()) {
-        auto& threads = GlobalScheduler().GetThreadList();
-        for (auto& thread : threads) {
-            if (!thread->IsHLEThread()) {
-                auto& arm_interface = thread->ArmInterface();
-                arm_interface.ClearInstructionCache();
-            }
+    auto& threads = GlobalScheduler().GetThreadList();
+    for (auto& thread : threads) {
+        if (!thread->IsHLEThread()) {
+            auto& arm_interface = thread->ArmInterface();
+            arm_interface.ClearInstructionCache();
         }
-    } else {
-        UNIMPLEMENTED_MSG("Cache Invalidation unimplemented for multicore");
     }
 }
 
diff --git a/src/core/hle/kernel/physical_core.cpp b/src/core/hle/kernel/physical_core.cpp
index c82c60a16..c6bbdb080 100644
--- a/src/core/hle/kernel/physical_core.cpp
+++ b/src/core/hle/kernel/physical_core.cpp
@@ -37,6 +37,10 @@ void PhysicalCore::Shutdown() {
     scheduler.Shutdown();
 }
 
+bool PhysicalCore::IsInterrupted() const {
+    return interrupt_handler.IsInterrupted();
+}
+
 void PhysicalCore::Interrupt() {
     guard->lock();
     interrupt_handler.SetInterrupt(true);
diff --git a/src/core/hle/kernel/physical_core.h b/src/core/hle/kernel/physical_core.h
index 85f6dec05..d7a7a951c 100644
--- a/src/core/hle/kernel/physical_core.h
+++ b/src/core/hle/kernel/physical_core.h
@@ -7,8 +7,6 @@
 #include <cstddef>
 #include <memory>
 
-#include "core/arm/cpu_interrupt_handler.h"
-
 namespace Common {
 class SpinLock;
 }
@@ -19,6 +17,7 @@ class Scheduler;
 
 namespace Core {
 class ARM_Interface;
+class CPUInterruptHandler;
 class ExclusiveMonitor;
 class System;
 } // namespace Core
@@ -45,9 +44,7 @@ public:
     void ClearInterrupt();
 
     /// Check if this core is interrupted
-    bool IsInterrupted() const {
-        return interrupt_handler.IsInterrupted();
-    }
+    bool IsInterrupted() const;
 
     // Shutdown this physical core.
     void Shutdown();
diff --git a/src/core/hle/kernel/scheduler.cpp b/src/core/hle/kernel/scheduler.cpp
index 61b8a396a..2b12c0dbf 100644
--- a/src/core/hle/kernel/scheduler.cpp
+++ b/src/core/hle/kernel/scheduler.cpp
@@ -658,7 +658,7 @@ void Scheduler::Reload() {
             cpu_core.LoadContext(thread->GetContext64());
             cpu_core.SetTlsAddress(thread->GetTLSAddress());
             cpu_core.SetTPIDR_EL0(thread->GetTPIDR_EL0());
-            cpu_core.ChangeProcessorId(this->core_id);
+            cpu_core.ChangeProcessorID(this->core_id);
             cpu_core.ClearExclusiveState();
         }
     }
@@ -691,7 +691,7 @@ void Scheduler::SwitchContextStep2() {
             cpu_core.LoadContext(new_thread->GetContext64());
             cpu_core.SetTlsAddress(new_thread->GetTLSAddress());
             cpu_core.SetTPIDR_EL0(new_thread->GetTPIDR_EL0());
-            cpu_core.ChangeProcessorId(this->core_id);
+            cpu_core.ChangeProcessorID(this->core_id);
             cpu_core.ClearExclusiveState();
         }
     }
diff --git a/src/core/hle/kernel/scheduler.h b/src/core/hle/kernel/scheduler.h
index 348107160..b3b4b5169 100644
--- a/src/core/hle/kernel/scheduler.h
+++ b/src/core/hle/kernel/scheduler.h
@@ -240,6 +240,10 @@ public:
         return switch_fiber;
     }
 
+    const std::shared_ptr<Common::Fiber>& ControlContext() const {
+        return switch_fiber;
+    }
+
 private:
     friend class GlobalScheduler;
 
diff --git a/src/tests/common/fibers.cpp b/src/tests/common/fibers.cpp
index 12536b6d8..4fd92428f 100644
--- a/src/tests/common/fibers.cpp
+++ b/src/tests/common/fibers.cpp
@@ -68,7 +68,7 @@ static void ThreadStart1(u32 id, TestControl1& test_control) {
  *  doing all the work required.
  */
 TEST_CASE("Fibers::Setup", "[common]") {
-    constexpr u32 num_threads = 7;
+    constexpr std::size_t num_threads = 7;
     TestControl1 test_control{};
     test_control.thread_fibers.resize(num_threads);
     test_control.work_fibers.resize(num_threads);