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TIF Experiments

This repository contains experiments used for evaluation of the bandwidth measurement for a simple switch reconfiguration code implementing a repeater, and a TIF switch reconfiguration code.

It is part of the paper Low Impact Tenant Code Updates on Multi-tenant Programmable Switches.

Disclaimer

This repositories contains code which was using proprietary hardware and software. Due to their license, these code parts were removed and must be added again, or triggered manually to achieve the experiment setup used in the proposed paper!

Prerequisites

  • iPerf3 must be installed on both used hosts.
  • The experiments were done with Tofino 1 switch, where the chip was started and initialized with the Barefoot SDE.
  • You need to compile the test code properly.
    • See for a example repeater implementation this P4 code
    • To get a working TIF forwarding pipeline config example, you can compile the given initial TIF by the SDE compiler or save the TIF compiled by OMuProCU-core.
  • Because of the license, some parts (e.g., Hardware initialization) in the experiment and swap scripts are removed. This must be added again to get this repository into a working state again.
  • Also, the swap scripts and the test code must be available at the Tofino 1 switch.

Usage

There are two experiment scripts which were used for this evaluation in the mentioned paper.

experiment.sh

This script will start a experiment running iPerf3 for the defined duration while it will trigger a switch reconfiguration and hardware initialization every 10 seconds. This experiment will repeated 10 times to achieve a significant result.

experiment-tif.sh

This script do the same as described before, with the only difference that a TIF example is used as switch chip reconfiguration code.

Evaluation

The evaluation script used for the postprocessing of the experiment is also available in this repository.

It is recommended to create a python virtual environment and install the needed python packages into it.

python3 -m venv .venv
source .venv/bin/activate
pip3 install -r requirements.txt

Afterwards, when the experiments were run successfully, you can the following command to generate plots and tables:

python3 experiments-post-processing.py