Hi everyone, I am a PhD candidate working on gem5. I am porting my project to full system and trying to use checkpointing to mitigate simulation times when debugging. I am working with Ruby and gem5's standard library. I managed to successfully create checkpoints with RISCV and x86 using the example scripts in: - configs/example/gem5_library/checkpoints/riscv-hello-save-checkpoint.py - tests/gem5/checkpoint_tests/configs/x86-fs-save-checkpoint.py When starting using Ruby, independently of the protocol, I encounter the following error: Taking checkpoint at x86-fs-test-checkpoint/ src/sim/simulate.cc:199: info: Entering event queue @ 10000000. Starting simulation... src/sim/simulate.cc:199: info: Entering event queue @ 3085974603. Starting simulation... src/sim/simulate.cc:199: info: Entering event queue @ 3086250853. Starting simulation... src/sim/simulate.cc:199: info: Entering event queue @ 3086274636. Starting simulation... src/sim/simulate.cc:199: info: Entering event queue @ 3086274637. Starting simulation... build/X86/mem/ruby/protocol/L1Cache_Controller.cc:1914: panic: Runtime Error at MESI_Two_Level-L1cache.sm:281: *Invalid RubyRequestType.* It seems that the sequencer is injecting a RubyRequest not supported by Ruby controllers. In the x86-fs-save-checkpoint.py script, comments suggests that it was successfully tested with the MESI_Two_Level. Is checkpointing supported for Ruby in full system? Thanks for your help. Best, Luis.