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[UnitTests] Add CoreTimingTest
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EmptyChaos
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2 changed files with 314 additions and 0 deletions
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add_dolphin_test(MMIOTest MMIOTest.cpp)
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add_dolphin_test(PageFaultTest PageFaultTest.cpp)
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add_dolphin_test(CoreTimingTest CoreTimingTest.cpp)
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313
Source/UnitTests/Core/CoreTimingTest.cpp
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313
Source/UnitTests/Core/CoreTimingTest.cpp
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// Copyright 2016 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <gtest/gtest.h>
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#include <array>
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#include <bitset>
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#include "Core/ConfigManager.h"
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#include "Core/Core.h"
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#include "Core/CoreTiming.h"
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#include "Core/PowerPC/PowerPC.h"
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// Numbers are chosen randomly to make sure the correct one is given.
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static constexpr std::array<u64, 5> CB_IDS{{42, 144, 93, 1026, UINT64_C(0xFFFF7FFFF7FFFF)}};
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static constexpr int MAX_SLICE_LENGTH = 20000; // Copied from CoreTiming internals
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static std::bitset<CB_IDS.size()> s_callbacks_ran_flags;
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static u64 s_expected_callback = 0;
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static s64 s_lateness = 0;
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template <unsigned int IDX>
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void CallbackTemplate(u64 userdata, s64 lateness)
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{
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static_assert(IDX < CB_IDS.size(), "IDX out of range");
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s_callbacks_ran_flags.set(IDX);
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EXPECT_EQ(CB_IDS[IDX], userdata);
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if (s_expected_callback) // In SharedSlot, we don't care about this
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EXPECT_EQ(CB_IDS[IDX], s_expected_callback);
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EXPECT_EQ(s_lateness, lateness);
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}
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class ScopeInit final
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{
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public:
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ScopeInit()
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{
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Core::DeclareAsCPUThread();
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SConfig::Init();
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PowerPC::Init(PowerPC::CORE_INTERPRETER);
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CoreTiming::Init();
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}
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~ScopeInit()
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{
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CoreTiming::Shutdown();
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PowerPC::Shutdown();
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SConfig::Shutdown();
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Core::UndeclareAsCPUThread();
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}
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};
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void AdvanceAndCheck(u32 idx, int downcount, int expected_lateness = 0, int cpu_downcount = 0)
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{
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s_callbacks_ran_flags = 0;
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s_expected_callback = CB_IDS[idx];
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s_lateness = expected_lateness;
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PowerPC::ppcState.downcount = cpu_downcount; // Pretend we executed X cycles of instructions.
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CoreTiming::Advance();
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EXPECT_EQ(decltype(s_callbacks_ran_flags)().set(idx), s_callbacks_ran_flags);
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EXPECT_EQ(downcount, PowerPC::ppcState.downcount);
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}
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TEST(CoreTiming, BasicOrder)
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{
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ScopeInit guard;
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CoreTiming::EventType* cb_a = CoreTiming::RegisterEvent("callbackA", CallbackTemplate<0>);
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CoreTiming::EventType* cb_b = CoreTiming::RegisterEvent("callbackB", CallbackTemplate<1>);
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CoreTiming::EventType* cb_c = CoreTiming::RegisterEvent("callbackC", CallbackTemplate<2>);
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CoreTiming::EventType* cb_d = CoreTiming::RegisterEvent("callbackD", CallbackTemplate<3>);
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CoreTiming::EventType* cb_e = CoreTiming::RegisterEvent("callbackE", CallbackTemplate<4>);
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// Enter slice 0
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CoreTiming::Advance();
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// D -> B -> C -> A -> E
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CoreTiming::ScheduleEvent(1000, cb_a, CB_IDS[0]);
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EXPECT_EQ(1000, PowerPC::ppcState.downcount);
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CoreTiming::ScheduleEvent(500, cb_b, CB_IDS[1]);
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EXPECT_EQ(500, PowerPC::ppcState.downcount);
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CoreTiming::ScheduleEvent(800, cb_c, CB_IDS[2]);
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EXPECT_EQ(500, PowerPC::ppcState.downcount);
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CoreTiming::ScheduleEvent(100, cb_d, CB_IDS[3]);
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EXPECT_EQ(100, PowerPC::ppcState.downcount);
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CoreTiming::ScheduleEvent(1200, cb_e, CB_IDS[4]);
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EXPECT_EQ(100, PowerPC::ppcState.downcount);
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AdvanceAndCheck(3, 400);
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AdvanceAndCheck(1, 300);
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AdvanceAndCheck(2, 200);
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AdvanceAndCheck(0, 200);
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AdvanceAndCheck(4, MAX_SLICE_LENGTH);
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}
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TEST(CoreTiming, SharedSlot)
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{
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ScopeInit guard;
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CoreTiming::EventType* cb_a = CoreTiming::RegisterEvent("callbackA", CallbackTemplate<0>);
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CoreTiming::EventType* cb_b = CoreTiming::RegisterEvent("callbackB", CallbackTemplate<1>);
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CoreTiming::EventType* cb_c = CoreTiming::RegisterEvent("callbackC", CallbackTemplate<2>);
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CoreTiming::EventType* cb_d = CoreTiming::RegisterEvent("callbackD", CallbackTemplate<3>);
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CoreTiming::EventType* cb_e = CoreTiming::RegisterEvent("callbackE", CallbackTemplate<4>);
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CoreTiming::ScheduleEvent(1000, cb_a, CB_IDS[0]);
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CoreTiming::ScheduleEvent(1000, cb_b, CB_IDS[1]);
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CoreTiming::ScheduleEvent(1000, cb_c, CB_IDS[2]);
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CoreTiming::ScheduleEvent(1000, cb_d, CB_IDS[3]);
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CoreTiming::ScheduleEvent(1000, cb_e, CB_IDS[4]);
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// Enter slice 0
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CoreTiming::Advance();
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EXPECT_EQ(1000, PowerPC::ppcState.downcount);
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s_callbacks_ran_flags = 0;
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s_lateness = 0;
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s_expected_callback = 0;
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PowerPC::ppcState.downcount = 0;
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CoreTiming::Advance();
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EXPECT_EQ(MAX_SLICE_LENGTH, PowerPC::ppcState.downcount);
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EXPECT_EQ(0x1FULL, s_callbacks_ran_flags.to_ullong());
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}
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TEST(CoreTiming, PredictableLateness)
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{
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ScopeInit guard;
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CoreTiming::EventType* cb_a = CoreTiming::RegisterEvent("callbackA", CallbackTemplate<0>);
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CoreTiming::EventType* cb_b = CoreTiming::RegisterEvent("callbackB", CallbackTemplate<1>);
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// Enter slice 0
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CoreTiming::Advance();
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CoreTiming::ScheduleEvent(100, cb_a, CB_IDS[0]);
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CoreTiming::ScheduleEvent(200, cb_b, CB_IDS[1]);
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AdvanceAndCheck(0, 90, 10, -10); // (100 - 10)
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AdvanceAndCheck(1, MAX_SLICE_LENGTH, 50, -50);
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}
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namespace ChainSchedulingTest
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{
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static int s_reschedules = 0;
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static void RescheduleCallback(u64 userdata, s64 lateness)
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{
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--s_reschedules;
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EXPECT_TRUE(s_reschedules >= 0);
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EXPECT_EQ(s_lateness, lateness);
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if (s_reschedules > 0)
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CoreTiming::ScheduleEvent(1000, reinterpret_cast<CoreTiming::EventType*>(userdata), userdata);
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}
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}
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TEST(CoreTiming, ChainScheduling)
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{
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using namespace ChainSchedulingTest;
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ScopeInit guard;
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CoreTiming::EventType* cb_a = CoreTiming::RegisterEvent("callbackA", CallbackTemplate<0>);
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CoreTiming::EventType* cb_b = CoreTiming::RegisterEvent("callbackB", CallbackTemplate<1>);
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CoreTiming::EventType* cb_c = CoreTiming::RegisterEvent("callbackC", CallbackTemplate<2>);
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CoreTiming::EventType* cb_rs =
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CoreTiming::RegisterEvent("callbackReschedule", RescheduleCallback);
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// Enter slice 0
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CoreTiming::Advance();
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CoreTiming::ScheduleEvent(800, cb_a, CB_IDS[0]);
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CoreTiming::ScheduleEvent(1000, cb_b, CB_IDS[1]);
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CoreTiming::ScheduleEvent(2200, cb_c, CB_IDS[2]);
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CoreTiming::ScheduleEvent(1000, cb_rs, reinterpret_cast<u64>(cb_rs));
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EXPECT_EQ(800, PowerPC::ppcState.downcount);
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s_reschedules = 3;
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AdvanceAndCheck(0, 200); // cb_a
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AdvanceAndCheck(1, 1000); // cb_b, cb_rs
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EXPECT_EQ(2, s_reschedules);
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PowerPC::ppcState.downcount = 0;
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CoreTiming::Advance(); // cb_rs
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EXPECT_EQ(1, s_reschedules);
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EXPECT_EQ(200, PowerPC::ppcState.downcount);
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AdvanceAndCheck(2, 800); // cb_c
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PowerPC::ppcState.downcount = 0;
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CoreTiming::Advance(); // cb_rs
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EXPECT_EQ(0, s_reschedules);
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EXPECT_EQ(MAX_SLICE_LENGTH, PowerPC::ppcState.downcount);
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}
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namespace ScheduleIntoPastTest
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{
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static CoreTiming::EventType* s_cb_next = nullptr;
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static void ChainCallback(u64 userdata, s64 lateness)
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{
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EXPECT_EQ(CB_IDS[0] + 1, userdata);
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EXPECT_EQ(0, lateness);
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CoreTiming::ScheduleEvent(-1000, s_cb_next, userdata - 1);
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}
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}
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// This can happen when scheduling from outside the CPU Thread.
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// Also, if the callback is very late, it may reschedule itself for the next period which
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// is also in the past.
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TEST(CoreTiming, ScheduleIntoPast)
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{
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using namespace ScheduleIntoPastTest;
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ScopeInit guard;
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s_cb_next = CoreTiming::RegisterEvent("callbackA", CallbackTemplate<0>);
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CoreTiming::EventType* cb_b = CoreTiming::RegisterEvent("callbackB", CallbackTemplate<1>);
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CoreTiming::EventType* cb_chain = CoreTiming::RegisterEvent("callbackChain", ChainCallback);
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// Enter slice 0
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CoreTiming::Advance();
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CoreTiming::ScheduleEvent(1000, cb_chain, CB_IDS[0] + 1);
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EXPECT_EQ(1000, PowerPC::ppcState.downcount);
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AdvanceAndCheck(0, MAX_SLICE_LENGTH, 1000); // Run cb_chain into late cb_a
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// Schedule late from wrong thread
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// The problem with scheduling CPU events from outside the CPU Thread is that g_global_timer
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// is not reliable outside the CPU Thread. It's possible for the other thread to sample the
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// global timer right before the timer is updated by Advance() then submit a new event using
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// the stale value, i.e. effectively half-way through the previous slice.
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// NOTE: We're only testing that the scheduler doesn't break, not whether this makes sense.
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Core::UndeclareAsCPUThread();
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CoreTiming::g_global_timer -= 1000;
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CoreTiming::ScheduleEvent(0, cb_b, CB_IDS[1], CoreTiming::FromThread::NON_CPU);
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CoreTiming::g_global_timer += 1000;
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Core::DeclareAsCPUThread();
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AdvanceAndCheck(1, MAX_SLICE_LENGTH, MAX_SLICE_LENGTH + 1000);
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}
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TEST(CoreTiming, Overclocking)
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{
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ScopeInit guard;
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CoreTiming::EventType* cb_a = CoreTiming::RegisterEvent("callbackA", CallbackTemplate<0>);
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CoreTiming::EventType* cb_b = CoreTiming::RegisterEvent("callbackB", CallbackTemplate<1>);
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CoreTiming::EventType* cb_c = CoreTiming::RegisterEvent("callbackC", CallbackTemplate<2>);
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CoreTiming::EventType* cb_d = CoreTiming::RegisterEvent("callbackD", CallbackTemplate<3>);
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CoreTiming::EventType* cb_e = CoreTiming::RegisterEvent("callbackE", CallbackTemplate<4>);
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// Overclock
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SConfig::GetInstance().m_OCEnable = true;
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SConfig::GetInstance().m_OCFactor = 2.0;
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// Enter slice 0
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// Updates s_last_OC_factor.
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CoreTiming::Advance();
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CoreTiming::ScheduleEvent(100, cb_a, CB_IDS[0]);
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CoreTiming::ScheduleEvent(200, cb_b, CB_IDS[1]);
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CoreTiming::ScheduleEvent(400, cb_c, CB_IDS[2]);
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CoreTiming::ScheduleEvent(800, cb_d, CB_IDS[3]);
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CoreTiming::ScheduleEvent(1600, cb_e, CB_IDS[4]);
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EXPECT_EQ(200, PowerPC::ppcState.downcount);
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AdvanceAndCheck(0, 200); // (200 - 100) * 2
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AdvanceAndCheck(1, 400); // (400 - 200) * 2
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AdvanceAndCheck(2, 800); // (800 - 400) * 2
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AdvanceAndCheck(3, 1600); // (1600 - 800) * 2
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AdvanceAndCheck(4, MAX_SLICE_LENGTH * 2);
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// Underclock
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SConfig::GetInstance().m_OCFactor = 0.5;
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CoreTiming::Advance();
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CoreTiming::ScheduleEvent(100, cb_a, CB_IDS[0]);
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CoreTiming::ScheduleEvent(200, cb_b, CB_IDS[1]);
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CoreTiming::ScheduleEvent(400, cb_c, CB_IDS[2]);
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CoreTiming::ScheduleEvent(800, cb_d, CB_IDS[3]);
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CoreTiming::ScheduleEvent(1600, cb_e, CB_IDS[4]);
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EXPECT_EQ(50, PowerPC::ppcState.downcount);
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AdvanceAndCheck(0, 50); // (200 - 100) / 2
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AdvanceAndCheck(1, 100); // (400 - 200) / 2
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AdvanceAndCheck(2, 200); // (800 - 400) / 2
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AdvanceAndCheck(3, 400); // (1600 - 800) / 2
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AdvanceAndCheck(4, MAX_SLICE_LENGTH / 2);
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// Try switching the clock mid-emulation
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SConfig::GetInstance().m_OCFactor = 1.0;
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CoreTiming::Advance();
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CoreTiming::ScheduleEvent(100, cb_a, CB_IDS[0]);
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CoreTiming::ScheduleEvent(200, cb_b, CB_IDS[1]);
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CoreTiming::ScheduleEvent(400, cb_c, CB_IDS[2]);
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CoreTiming::ScheduleEvent(800, cb_d, CB_IDS[3]);
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CoreTiming::ScheduleEvent(1600, cb_e, CB_IDS[4]);
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EXPECT_EQ(100, PowerPC::ppcState.downcount);
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AdvanceAndCheck(0, 100); // (200 - 100)
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SConfig::GetInstance().m_OCFactor = 2.0;
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AdvanceAndCheck(1, 400); // (400 - 200) * 2
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AdvanceAndCheck(2, 800); // (800 - 400) * 2
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SConfig::GetInstance().m_OCFactor = 0.1f;
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AdvanceAndCheck(3, 80); // (1600 - 800) / 10
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SConfig::GetInstance().m_OCFactor = 1.0;
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AdvanceAndCheck(4, MAX_SLICE_LENGTH);
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}
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