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To-do: Add synchronization support

For SimBricks messages sent by gem5, we want the simulation to look like it started at tick 0. The reason is that otherwise, after restoring a checkpoint, connected simulators first have to catch up, i.e. simulate until the checkpoint tick before the simulation can continue.

* dist/common/base: fix taking member of packed struct warning

* trace: removed outdated folder

* lib/simbricks/nicbm/multinic: fixed boost bind warning

* sims/net/pktgen/pktgen: removed forward_pkt and potential use

This adds a new component E2ESimbricksNetwork to the end-to-end
framework, which allows to connect to other simulated networks through
Simbricks.

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 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.

besides main time, print in and out timestamp for the ports' underlying SimBricks interfaces

Add new target `clean-external` to the Makefile, which triggers the
clean task of the respective buid system for each external simulator.
Each simulator can also be cleaned individually by using the targets
`{simulator name}-clean` (e.g. `gem5-clean`).

`make distclean` now actually removes the external simulators

this gets rid of the non-fatal build error 'No names found, cannot describe anything'

Simply installs vanilla simics under sims/external/simics. Because of licensing
restrictions we cannot automatically download simics from the intel page.
Instead the makefile will prompt the user to download to files and add them to
the simics directory.

This commit does not include any simbricks integration at all yet.
Co-authored-by: Antoine Kaufmann <antoinek@mpi-sws.org>

The newer linux drivers now use 16b instead of 32b descriptors. So far
this leads to an abort. This adds proper support for 16b descriptors.

Depending on the order some of the constructors get executed, instances of the
logger can end up with a null pointer for the runner. This led to a segfault
when calling TimePs() on that nullptr.

Here we fix this in two steps: first the logger takes a device pointer, which
in turn contains a pointer to the runner that will eventually be initialized.
Also fix up the logger to simply use 0 as a timestamp for log events before the
runner is there.

P4 implementation of memory steering and address translation with the tofino
simulator.

Basic switch simulator that can steer network memory requests to different
network attached memory modules based on a configured address mapping. The
switch also performs address translation.
Co-authored-by: GAO Bin <bingao.cs@gmail.com>

Basic behavioral simulator for a memory controller to access  network attached
memory accessed via a simple UDP protocol.
Co-authored-by: Hejing Li <hajeongee@gmail.com>
Co-authored-by: Antoine Kaufmann <antoinek@mpi-sws.org>

Basic behavioral simulator for a network attached memory accessed via a simple
UDP protocol.
Co-authored-by: Hejing Li <hajeongee@gmail.com>
Co-authored-by: Antoine Kaufmann <antoinek@mpi-sws.org>

A very simple UDP-based protocol for accessing network-attached memories.

Basic behavioral memory simulator that implements the new memory protocol.
Co-authored-by: Antoine Kaufmann <antoinek@mpi-sws.org>
Co-authored-by: Jonas Kaufmann <jokau03@gmail.com>

make lint should pass again now