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https://github.com/FEX-Emu/FEX.git
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Ryan Houdek
753d0ede6c
Creates a pool allocator for OpcodeDispatcher and IRCompaction that shares memory allocations between threads in a pool and supports reclaiming stale allocations from participating threads. A thread will use a heuristic to keep its claimed memory allocation around if it is allocating a lot of code. If it slows down then it will start putting the memory allocation back in to the thread pool. Additionally if the allocation has been "disowned" and gone to sleep while still retaining the allocation, then another thread can inspect these stale allocations and reclaim it from the idling thread. Saving further memory. This needs some more work and cleanup but this is an interesting concept that saves a decent amount of memory even in a basic test. Causes teeworlds' title screen to go from 754MB to 599MB in my simple test. 79.4% the memory usage is a good start.
48 lines
1.2 KiB
C++
48 lines
1.2 KiB
C++
#pragma once
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#include <FEXCore/IR/IR.h>
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#include <FEXCore/IR/IREmitter.h>
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#include "HarnessHelpers.h"
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#include <FEXCore/Utils/Allocator.h>
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#include <map>
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#include <memory>
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#include <stdint.h>
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#include <string>
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#include <sys/mman.h>
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using namespace FEXCore::IR;
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namespace FEX::IRLoader {
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class Loader final {
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public:
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Loader(std::string const &Filename, std::string const &ConfigFilename);
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bool IsValid() const { return ParsedCode != nullptr; }
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IREmitter* GetIREmitter() { return ParsedCode.get(); }
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uint64_t GetEntryRIP() const { return EntryRIP; }
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bool CompareStates(FEXCore::Core::CPUState const* State) {
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return Config.CompareStates(State, nullptr);
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}
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void LoadMemory() {
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Config.LoadMemory();
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}
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void MapRegions() {
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for (auto& [region, size] : Config.GetMemoryRegions()) {
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FEXCore::Allocator::mmap(reinterpret_cast<void*>(region), size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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}
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}
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private:
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uint64_t EntryRIP{};
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std::unique_ptr<IREmitter> ParsedCode;
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FEXCore::Utils::PooledAllocatorMalloc Allocator;
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FEX::HarnessHelper::ConfigLoader Config;
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};
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}
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