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-rw-r--r--src/core/core.cpp30
-rw-r--r--src/core/core.h24
-rw-r--r--src/core/core_cpu.cpp25
-rw-r--r--src/core/core_cpu.h33
4 files changed, 94 insertions, 18 deletions
diff --git a/src/core/core.cpp b/src/core/core.cpp
index 0af78c18c..066423f23 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -27,6 +27,13 @@ namespace Core {
System::~System() = default;
+/// Runs a CPU core while the system is powered on
+static void RunCpuCore(std::shared_ptr<Cpu> cpu_state) {
+ while (Core::System().GetInstance().IsPoweredOn()) {
+ cpu_state->RunLoop(true);
+ }
+}
+
System::ResultStatus System::RunLoop(bool tight_loop) {
status = ResultStatus::Success;
@@ -109,7 +116,7 @@ System::ResultStatus System::Load(EmuWindow* emu_window, const std::string& file
}
void System::PrepareReschedule() {
- cpu_cores[0]->PrepareReschedule();
+ CurrentCpuCore().PrepareReschedule();
}
PerfStats::Results System::GetAndResetPerfStats() {
@@ -123,14 +130,13 @@ System::ResultStatus System::Init(EmuWindow* emu_window, u32 system_mode) {
current_process = Kernel::Process::Create("main");
- for (auto& cpu_core : cpu_cores) {
- cpu_core = std::make_unique<Cpu>();
+ cpu_barrier = std::make_shared<CpuBarrier>();
+ for (size_t index = 0; index < cpu_cores.size(); ++index) {
+ cpu_cores[index] = std::make_shared<Cpu>(cpu_barrier, index);
}
gpu_core = std::make_unique<Tegra::GPU>();
-
telemetry_session = std::make_unique<Core::TelemetrySession>();
-
service_manager = std::make_shared<Service::SM::ServiceManager>();
HW::Init();
@@ -142,6 +148,14 @@ System::ResultStatus System::Init(EmuWindow* emu_window, u32 system_mode) {
return ResultStatus::ErrorVideoCore;
}
+ // Create threads for CPU cores 1-3, and build thread_to_cpu map
+ // CPU core 0 is run on the main thread
+ thread_to_cpu[std::this_thread::get_id()] = cpu_cores[0];
+ for (size_t index = 0; index < cpu_core_threads.size(); ++index) {
+ cpu_core_threads[index] = std::make_unique<std::thread>(RunCpuCore, cpu_cores[index + 1]);
+ thread_to_cpu[cpu_core_threads[index]->get_id()] = cpu_cores[index + 1];
+ }
+
NGLOG_DEBUG(Core, "Initialized OK");
// Reset counters and set time origin to current frame
@@ -171,9 +185,15 @@ void System::Shutdown() {
telemetry_session.reset();
gpu_core.reset();
+ // Close all CPU/threading state
+ thread_to_cpu.clear();
for (auto& cpu_core : cpu_cores) {
cpu_core.reset();
}
+ for (auto& thread : cpu_core_threads) {
+ thread->join();
+ thread.reset();
+ }
CoreTiming::Shutdown();
diff --git a/src/core/core.h b/src/core/core.h
index 6e6cc7579..21a0b074b 100644
--- a/src/core/core.h
+++ b/src/core/core.h
@@ -7,6 +7,7 @@
#include <array>
#include <memory>
#include <string>
+#include <thread>
#include "common/common_types.h"
#include "core/core_cpu.h"
#include "core/hle/kernel/kernel.h"
@@ -112,7 +113,7 @@ public:
* @returns A reference to the emulated CPU.
*/
ARM_Interface& CPU() {
- return cpu_cores[0]->CPU();
+ return CurrentCpuCore().CPU();
}
Tegra::GPU& GPU() {
@@ -120,7 +121,7 @@ public:
}
Kernel::Scheduler& Scheduler() {
- return cpu_cores[0]->Scheduler();
+ return CurrentCpuCore().Scheduler();
}
Kernel::SharedPtr<Kernel::Process>& CurrentProcess() {
@@ -157,6 +158,14 @@ public:
}
private:
+ /// Returns the current CPU core based on the calling host thread
+ Cpu& CurrentCpuCore() {
+ const auto& search = thread_to_cpu.find(std::this_thread::get_id());
+ ASSERT(search != thread_to_cpu.end());
+ ASSERT(search->second);
+ return *search->second;
+ }
+
/**
* Initialize the emulated system.
* @param emu_window Pointer to the host-system window used for video output and keyboard input.
@@ -167,14 +176,12 @@ private:
/// AppLoader used to load the current executing application
std::unique_ptr<Loader::AppLoader> app_loader;
-
- std::array<std::unique_ptr<Cpu>, 4> cpu_cores;
std::unique_ptr<Tegra::GPU> gpu_core;
std::shared_ptr<Tegra::DebugContext> debug_context;
Kernel::SharedPtr<Kernel::Process> current_process;
-
- /// When true, signals that a reschedule should happen
- bool reschedule_pending{};
+ std::shared_ptr<CpuBarrier> cpu_barrier;
+ std::array<std::shared_ptr<Cpu>, NUM_CPU_CORES> cpu_cores;
+ std::array<std::unique_ptr<std::thread>, NUM_CPU_CORES - 1> cpu_core_threads;
/// Service manager
std::shared_ptr<Service::SM::ServiceManager> service_manager;
@@ -186,6 +193,9 @@ private:
ResultStatus status = ResultStatus::Success;
std::string status_details = "";
+
+ /// Map of guest threads to CPU cores
+ std::map<std::thread::id, std::shared_ptr<Cpu>> thread_to_cpu;
};
inline ARM_Interface& CPU() {
diff --git a/src/core/core_cpu.cpp b/src/core/core_cpu.cpp
index 81c0e212d..6bdfdd7df 100644
--- a/src/core/core_cpu.cpp
+++ b/src/core/core_cpu.cpp
@@ -2,6 +2,9 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
+#include <condition_variable>
+#include <mutex>
+
#include "common/logging/log.h"
#ifdef ARCHITECTURE_x86_64
#include "core/arm/dynarmic/arm_dynarmic.h"
@@ -16,7 +19,9 @@
namespace Core {
-Cpu::Cpu() {
+Cpu::Cpu(std::shared_ptr<CpuBarrier> cpu_barrier, size_t core_index)
+ : cpu_barrier{std::move(cpu_barrier)}, core_index{core_index} {
+
if (Settings::values.use_cpu_jit) {
#ifdef ARCHITECTURE_x86_64
arm_interface = std::make_shared<ARM_Dynarmic>();
@@ -32,15 +37,25 @@ Cpu::Cpu() {
}
void Cpu::RunLoop(bool tight_loop) {
+ // Wait for all other CPU cores to complete the previous slice, such that they run in lock-step
+ cpu_barrier->Rendezvous();
+
// If we don't have a currently active thread then don't execute instructions,
// instead advance to the next event and try to yield to the next thread
if (Kernel::GetCurrentThread() == nullptr) {
- NGLOG_TRACE(Core, "Idling");
- CoreTiming::Idle();
- CoreTiming::Advance();
+ NGLOG_TRACE(Core, "Core-{} idling", core_index);
+
+ if (IsMainCore()) {
+ CoreTiming::Idle();
+ CoreTiming::Advance();
+ }
+
PrepareReschedule();
} else {
- CoreTiming::Advance();
+ if (IsMainCore()) {
+ CoreTiming::Advance();
+ }
+
if (tight_loop) {
arm_interface->Run();
} else {
diff --git a/src/core/core_cpu.h b/src/core/core_cpu.h
index 312db1655..e6ed698cc 100644
--- a/src/core/core_cpu.h
+++ b/src/core/core_cpu.h
@@ -4,7 +4,9 @@
#pragma once
+#include <condition_variable>
#include <memory>
+#include <mutex>
#include <string>
#include "common/common_types.h"
@@ -16,9 +18,32 @@ class Scheduler;
namespace Core {
+constexpr unsigned NUM_CPU_CORES{4};
+
+class CpuBarrier {
+public:
+ void Rendezvous() {
+ std::unique_lock<std::mutex> lock(mutex);
+
+ --cores_waiting;
+ if (!cores_waiting) {
+ cores_waiting = NUM_CPU_CORES;
+ condition.notify_all();
+ return;
+ }
+
+ condition.wait(lock);
+ }
+
+private:
+ unsigned cores_waiting{NUM_CPU_CORES};
+ std::mutex mutex;
+ std::condition_variable condition;
+};
+
class Cpu {
public:
- Cpu();
+ Cpu(std::shared_ptr<CpuBarrier> cpu_barrier, size_t core_index);
void RunLoop(bool tight_loop = true);
@@ -34,13 +59,19 @@ public:
return *scheduler;
}
+ bool IsMainCore() const {
+ return core_index == 0;
+ }
+
private:
void Reschedule();
std::shared_ptr<ARM_Interface> arm_interface;
+ std::shared_ptr<CpuBarrier> cpu_barrier;
std::unique_ptr<Kernel::Scheduler> scheduler;
bool reschedule_pending{};
+ size_t core_index;
};
} // namespace Core
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 08:48:11 +0000