Hi! I'm using gem5 in SE mode, x86 OoO detailed cores and Ruby with the MOESI_CMP_directory coherence protocol. I'm trying to fast-forward the execution of the non-interesting parts of the benchmarks, so I've been taking a look at the changesets related to KVM. They look promising but the whole thing is giving me some problems right now, can anyone explain me how to use the KVM? I was planning to the following: 1) Run the benchmark with SE + KVMcpu + Ruby with MOESI_hammer and create a checkpoint with the m5op m5_checkpoint(), 2) Restore from the checkpoint with SE + OoO cpu + Ruby with MOESI_CMP_directory. The first problem I've found is that the combination of KVM and Ruby is not supported, so I've tried to create the checkpoint without Ruby but it throws an error at startup (see below). My question is: is there any way to use kvm to create a checkpoint and then restoring with my normal configuration of SE + OoO + Ruby MOESI_CMP_directory? Here is the error I've found with se.py and kvm: command line: ./build/X86/gem5.debug configs/example/se.py --cpu-type=kvm --num-cpus=1 -c benchmark Global frequency set at 1000000000000 ticks per second Error in unproxying param 'kvmVM' of system.cpu Traceback (most recent call last): File "<string>", line 1, in <module> File "/home/lluc/Desktop/gem5/src/python/m5/main.py", line 388, in main exec filecode in scope File "configs/example/se.py", line 258, in <module> Simulation.run(options, root, system, FutureClass) File "/home/lluc/Desktop/gem5/configs/common/Simulation.py", line 415, in run m5.instantiate(checkpoint_dir) File "/home/lluc/Desktop/gem5/src/python/m5/simulate.py", line 87, in instantiate for obj in root.descendants(): obj.unproxyParams() File "/home/lluc/Desktop/gem5/src/python/m5/SimObject.py", line 911, in unproxyParams value = value.unproxy(self) File "/home/lluc/Desktop/gem5/src/python/m5/proxy.py", line 94, in unproxy (self.path(), self._pdesc.ptype_str, base.path()) AttributeError: Can't resolve proxy 'any' of type 'KvmVM' from 'system.cpu' Thanks in advance, Lluc WARNING / LEGAL TEXT: This message is intended only for the use of the individual or entity to which it is addressed and may contain information which is privileged, confidential, proprietary, or exempt from disclosure under applicable law. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, you are strictly prohibited from disclosing, distributing, copying, or in any way using this message. If you have received this communication in error, please notify the sender and destroy and delete any copies you may have received. http://www.bsc.es/disclaimer