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yapf takes a long time to run when this directory contains large output files

drastically speeds up simulation performance in the presence of a lot of output

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.

This adds the physical memory region to the kernel memory manager in a second
(emulated) numa node.

Co-authored-by: Hejing Li <hajeongee@gmail.com>

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>

Co-authored-by: Jonas Kaufmann <jokau03@gmail.com>

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>

This protocol is for basic read-write memory bus connections.
Co-authored-by: Jonas Kaufmann <jokau03@gmail.com>

Otherwise make lint-clang-format still succeeds even if there are issues. This
also causes the github action to pass and not flag issues.

With gcc 10, the default switched to -fno-common. This breaks memcached. We
need to explicilty pass -fcommon in the CFLAGS.

This is the newest LTS kernel release. Will also come in handy for
disaggregated memory stuff later.

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

This avoids the following warning printed many times:

  UserWarning: Specifying exception names in the overgeneral-exceptions option
  without module name is deprecated and support for it will be removed in
  pylint 3.0. Use fully qualified name (maybe 'builtins.BaseException' ?)
  instead.