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Instead of passing all parameters using the command line, we write them
first into a file and then pass the filename to the end-to-end
framework.

Use the new basic building blocks SwitchNode and SimpleChannel in the
ns3 end-to-end framework to build topologies.

This adds support for configuring and running simulations using the ns3
end-to-end framework.

This temporarily drops support for DDIO and the L3 cache.

Update to newer ns-3 version and adapt code for changes (mostly
renamed files and command line parameters) in the ns-3 submodule.

Currently, when a checkpoint is created in gem5 using the KVM CPU, the
simulated tick when the checkpoint is taken will end up in the few
seconds or more when the KVM CPU is slow. When the checkpoint is
afterwards restored, gem5 will continue the simulation at this tick.
This means that other, synchronized simulators first have to catch up,
essentially just synchronizing without performing any useful work.
Depending on their speed, this can take a lot of time and is especially
costly with a RTL simulator in the loop. To avoid this we now, by
default, edit the to be restored gem5 checkpoint to start at tick 0
instead.

Includes a new simulator type, and integration for host simulators to add
memory devices. Currently only implemented for gem5.
Co-authored-by: Hejing Li <hajeongee@gmail.com>

This uses somewhat more specific exception types instead of just Exception()
everywhere. Makes pylint happy.

I basically did the following:
`mkdir experiments/simbricks/orchestration`
`mv experiments/simbricks/* experiments/simbricks/orchestration/`

Additionally, imports and paths had to be adjusted.

Experiments can explicitly specify opt/fast (default is the latter).