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Themis

This repository contains the source codes of the prototype for our SOSP'24 poster: Themis: Efficiently Mitigating Congestion-Induced Fairness Disparities in Long-Haul RDMA Networks. Here are edited files:

  • SwitchNode::SwitchNotifyDequeue: if it's a External Switch, after get packets with ECN mark, switches will proactively send CNP to the target sender at intervals of 10us, similar to the Nofitifcation Point on the receiver of DCQCN.
  • QbbNetDevice::ReceiveCnp: records info in m_cnp_hanlder if it receives a CNP from hosts.
  • QbbNetDevice::DequeueAndTransmit: External Switch will act as a early Reaction Point, resubmit operated in this function.

Evaluation

Our simulator is based on the RDMA simulator for HPCC. It is based on NS-3 version 3.17.

Build

cd simulation
sudo chmod +x waf
./waf configure

Please note if gcc version > 5, compilation will fail due to some ns3 code style. If this what you encounter, please use: CC='gcc-5' CXX='g++-5' ./waf configure

Run

At directory of simulation

./waf --run 'scratch/third mix/config.txt'
cd ./mix
python3 lrx_analyze.py
  • In ./mix/config.txt
  • Set ENABLE_THEMIS to true, test our solution
  • Set ENABLE_THEMIS to false, and set CC_MODE to 1, test origin DCQCN solution
  • Set ENABLE_THEMIS to false, and set CC_MODE to 3, test origin HPCC solution