6.5 Using the software

BigNetSim has 2 major modes.

• Trace based traffic simulation
• Artificial traffic generation based simulation. The mode of the simulator is governed by the parameter in the netconfig file. When set to 0, trace based simulation is used, when set to 1, traffic generation is used.

Trace based simulation. This is used to study target application performance, or detailed network performance when loaded by a specific application.

There are two command line parameters for traced based simulation.

./bigsimulator arg1 arg2

 arg1 = 0 => Latency only mode
        1 => Detailed contention model
 arg2 = N => starts execution at the time marked by skip point N (0 is start)

Artificial traffic generation based simulation is use to study the performance of interconnects under standard network load schemes.

./bigsimulator arg1 arg2 arg3 arg4 arg5 arg6

example

./bigsimulator 1 2 3 100 2031 0.1

 arg1 = 0 => Latency only mode
        1 => Detailed contention model
 arg2 = 1 => deterministic traffic
        2 => poisson traffic
 arg3 = 1 => KSHIFT
        2 => RING
        3 => BITTRANSPOSE
        4 => BITREVERSAL
        5 => BITCOMPLEMENT
        6 => UNIFORM_DISTRIBUTION
 arg4 = number of packets
 arg5 = message size
 arg6 = load factor