Multi-module Adaptation With WASL

This repo contains source code and other artifacts related to the paper WASL: Harmonizing Uncoordinated Adaptive Modules in Multi-Tenant Cloud Systems. WASL is a rate-adaptation based technique for runtime cross-layer coordination in multi-tenant clouds to mitigate performance interference arising due to multiple colocated adaptive applications.

DOI Reference: Zenodo

TailBench applications have been used for evaluation. Tailbench details are here.
TailBenchMod : Updates to standard TailBench suite used for experiments

Require Bare-Metal Instances:

Bare-metal hardware resources are needed for Energy Monitoring and CPU Frequency Scaling for this system.
Could VMs are often not bare-metal instances; those will not work for this system.

p_state drivers:

Many Intel processors have active mode enabled by default for intel_pstate driver.
For managing CPU frequencies in this work, passive mode is needed; hardware managed P_State (HWP) support has to be disabled.
echo "passive" > /sys/devices/system/cpu/intel_pstate/status

Further information about CPU performance scaling driver can be referenced here.

Please review the setup instructions available here carefully.

Code Structure

/                           : Overall Runtime System
|-- apto-tailbench-apps     : Wrapper/Profiler for Application/System
|-- apto-tailbench-apps/scripts : Helper scripts for profiling/parsing
|-- apto                    : Processing and Activation,
                              coordination with the Adaptation Module
|-- OptimizingController    : Adaptation Module (local)
|-- PoleAdaptation          : WASL-based Multi-Module Adaptation (global)
|-- Plots                   : Scripts related to some results
|-- Infra                   : Experimented Set-up on an AWS instance

Each folder has its own Readme file.

Citation

The following paper can be cited:

@inproceedings{DBLP:conf/wasl/PervaizDKSH26,
  author       = {Ahsan Pervaiz and
                  Anwesha Das and
                  Vedant Kodagi and
                  Muhammad Husni Santriaji and
                  Henry Hoffmann},
  title        = {{WASL:} Harmonizing Uncoordinated Adaptive Modules in Multi-Tenant
                  Cloud Systems},
  booktitle    = {Proceedings of the 17th {ACM/SPEC} International Conference on Performance
                  Engineering, {ICPE} 2026, Florence, Italy, May 4-8, 2026},
  pages        = {301--313},
  publisher    = {{ACM}},
  year         = {2026}
}