Workflow Optimization for Parallel Split Learning

This code is for the paper: Tirana, J., Tsigkari D., Iosifidis G., Chatzopoulos, D. Workflow Optimization for Parallel Split Learning, in proc. of IEEE INFOCOM 2024.

ATTENTION !!! This documentation concerns the release v1.0.1 from February !!!

The additional coding files are not finalized yet...

Set-up and requirements steps

1. Python > 3.9
2. Install cvxpy, run: pip install cvxpy
3. Install GUROBI for cvxpy, run: pip install gurobipy
4. Get access to GUROBI license. There is a free academic license here.
5. run pip install -r requirements.txt

Main code

The following scripts, which can be found inside the folder util_files, implement the main algorithms of the paper (i.e, Algorithm 1 and 2), and are used to run the testing scripts:

• utils.py: reads the input file with the profiled data and creates the input tensors.
• ILP_solver.py: solves the problem using only the solver.
• heuristic_FCFS.py: solves the problem using the balanced_greedy algorthm described in Section IV. In this algorithm, the client assignment is implemented using a greedy approach, whereas the scheduling takes place using the FCFS policy.
• random_benchmark.py: this is the benchmark approach that is used to compare the proposed approach. The client assignment problem is implemented using a random function, whereas the scheduling takes place using the FCFS policy.
• ADMM_solution.py: Implements the ADMM-base solution described in Figure 3. Implements Algorithm 1 and solves the $P_f$ problem. Also, solves the $P_b$ problem using the Algorithm 2 (see comment in util_files/README).

The scripts above can be used as function calls for other scripts, just import the respective file. However, a scenario and input parameters should be defined. In case you want to build your own scenarios you can follow the flow of the scripts described below (i.e., the testing scripts).

Testing files

The following scripts, which can be found inside the folder test_files, can be used to reproduce the experiments of the paper. In a nutshell, they build scenarios and call the respective algorithms. In more detail:

observation_1.py: This script can be used to reproduce experiments shown in Table II in the paper. This script measures the optimality gap between the ADMM-based solution and the optimal solution. Also, it compares the computing time of the two approaches.

Parameter of observation_1	Description
log	Filename for the logging. The script writes intermediate results into a file.
clients, K	The number of clients.
helpers, H	The number of helpers.
model, m	The model architecture. Options: resnet101, vgg19.
dataset, d	Dataset to use. Options: mnist, cifar10.
scenario, s	Scenario 1 for low heterogeneity and 2 for high.

observation_2.py: This script can be used to reproduce the experiments shown in Figure 6 in the paper. This script compares the resulting makespan using the ADMM approach for different slot lengths. By default the K = 50 and H = [5, 10], and slot duration = [50, 150, 200]

Parameter of observation_2	Description
log	Filename for the logging. The script writes intermediate results into a file.
model, m	The model architecture. Options: resnet101, vgg19.
dataset, d	Dataset to use. Options: mnist, cifar10.

observation_3.py: This script can be used to reproduce the experiments shown in Figure 7 in the paper. This script compares the output makespan and computing time amongst the ADMM-approach the balanced-greedy and the benchmark approach.

Parameter of observation_3	Description
log	Filename for the logging. The script writes intermediate results into a file.
clients, K	The number of clients.
helpers, H	The number of helpers.
model, m	The model architecture. Options: resnet101, vgg19.
dataset, d	Dataset to use. Options: mnist, cifar10.
scenario, s	Scenario 1 for low heterogeneity and 2 for high.

observation_4.py: This script can be used to reproduce the experiments shown in Figure 8 in the paper. This script compares makespan when adding more helpers to the system. By default the K = 100 and H = [1, 2, 5, 10, 20, 25].

Parameter of observation_4	Description
log	Filename for the logging. The script writes intermediate results into a file.
model, m	The model architecture. Options: resnet101, vgg19.
dataset, d	Dataset to use. Options: mnist, cifar10.

Citation: If you find this repository useful, please cite our paper:

@inproceedings{tirana2024workflow,
      title={Workflow Optimization for Parallel Split Learning},
      author={Tirana, Joana and Tsigkari, Dimitra and Iosifidis, George and Chatzopoulos, Dimitris},
      booktitle={proc. of IEEE INFOCOM},
      year={2024}
}