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changed MPI_COMM_WORLD into MPI_COMM_CODES and made model-net-mpi-replay a function instead of a main

Change-Id: I2d673f6b4925e97efd79f3e383607068914cf78e

Documentation in src/networks/model-net/doc/README.fattree.txt

This commit is joint work by Jens Domke and Nikhil Jain.

Jens did all the ground work for dumping the topology and reading the routing
tables. He also wrote the scripts that perform the intermediate steps that
generate the routing tables using the topology.

Nikhil integrated Jens's changes into CODES by breaking them into a 3 step
process as described in src/networks/model-net/doc/README.fattree.txt.

Change-Id: I1478fb2ab83b9ded0673d8f897e09a423868795a

- Update routing algorithm to take into account new custom- mapping
between L1 and L2 switches
- Added total finished packets to stats collection file
- Updates to layout connections output for visualization

 - Verified to construct 3-level fat trees correctly using custom-
approach.
 - Verified to work with 2, 3 and 4 pods.

 - fattree-config-up-connections
 - sim_log.txt

Change-Id: I6385db30cb3a26db69c117c793c1ebd2543d8e9f

  - Cleaned up connections code
  - Wrapped layout generation in #define FATTREE_CONNECTIONS
  - Replaced hard coded switch id to use r->switch_id+p->num_terminals

Change-Id: I4aa8fb074b9142a0bc2a2311c158a356f12f79cb

Change-Id: I31e9ca9f33dc4829e60c69baf9fca45efd7a0f62

Change-Id: I85a8e0d27966afda2dabfbc10a37f91ee838a1af

Change-Id: Ic968ed172e51862dbcfc63050f51ef0b5d01a3cf

Change-Id: I6677c21ebce465ab18ece457b839fa374615da75

Change-Id: Iea68b2f46526244d4c5f874b6f4b844af3e697f2

Change-Id: Ib1c9872d295dbd61d7e2dc16e5269f111107938b

Change-Id: If8c21b26eb9c04ee640e3ba3a4ab170a5b5e4555

Noah Wolfe authored Aug 11, 2016 and Nikhil committed Aug 22, 2016

- Moved switch reverse event handlers into separate functions located
before their forward counterparts.

Noah Wolfe authored Aug 11, 2016 and Nikhil committed Aug 22, 2016

- Initialized missing variables in terminal_init to zero
- Optimistic net events number is very close to sequential net events
- Vc_occupany and terminal_length changed to increment/decrement by
chunk_size instead of packet_size in packet_send_rc()
- Updated packet_send() to handle chunk level
- Many changes of packet_size to chunk_size

Noah Wolfe authored Aug 05, 2016 and Nikhil committed Aug 22, 2016

- Add injection load functionality to workload file
- Correspondingly adjusted stats collection to include load
- Cleaned up log file offsets to match header

Noah Wolfe authored Aug 05, 2016 and Nikhil committed Aug 22, 2016

- Stats are output to log file in modelnet-test directory
- Stats are added from terminal_final(), switch_final(), report_stats(),
and within main() of the synthetic workload file
- Stats include ROSS sim metrics (i.e. synch mode, gvt-interval,
rollbacks, etc.), as well as network params/results (i.e. num terminals,
num switches, workload, avg latency, max latency, etc)

Noah Wolfe authored Aug 02, 2016 and Nikhil committed Aug 22, 2016

- Moved terminal reverse event handlers into separate functions located
before their forward counterparts.
- Cleaned up previously commented code

Noah Wolfe authored Aug 02, 2016 and Nikhil committed Aug 22, 2016

- Cleaned packet_generate()
- Fixed bug in decrementing terminal_length