PlayStation 3 Emulator Accelerated - RPCS3 Runs Up to 48% Faster on Ryzen 9 9950X3D
Translated with AI from the Russian original.
The creators of the RPCS3 project continue to delight players with optimizations. Recently, they announced another technical achievement — the PlayStation 3 emulator can run faster.
A developer under the nickname Megamouse noticed that “after compiling the first modules, PPU compilation only loads the CPU by about 20%.” He decided to investigate the reasons for this system behavior:
My search led me to memory allocation and deallocation operations in LLVM: it seems they all use one common lock. The problem is that over time, memory becomes fragmented, and many threads have to wait until a sufficiently large contiguous block is freed again.
Megamouse proposed a solution that allows improving the performance of the RPCS3 emulator — switching to SegmentHeap (a memory allocation mechanism in Windows). During Gran Turismo 6 tests on a PC with an AMD Ryzen 9 9950X3D processor, “PPU/SPU recompilation time was reduced from 2 min 50 s to 1 min 55 s; 48% faster!”
However, Megamouse warned that this solution requires additional testing. He admits that technical problems may arise:
I don't know if [SegmentHeap] will break anything or how it will affect overall performance. But now, during PPU compilation, my CPU is almost constantly loaded at nearly 100%, and the compilation itself is more than three times faster.
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