Towards Low-Latency Function-as-a-Service: Ensuring Real-Time Performance in Open Source FaaS

Balla, Dávid and Molnár, Márton and Varga, László and Bencs, Botond and Pašić, Alija and Szalay, Márk (2025) Towards Low-Latency Function-as-a-Service: Ensuring Real-Time Performance in Open Source FaaS. In: 67th International Symposium ELMAR-2025. Croatian Society Electronics in Marine (ELMAR), Zadar.

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Abstract

Function-as-a-Service (FaaS) is a highly efficient paradigm in serverless cloud computing, offering automated resource provisioning, scalability, and simplified software main tenance. Emerging applications in 5G and 6G networks, the Internet of Things, and Industry 4.0/5.0 increasingly necessitate the offloading of time-critical functions to cloud and edge comput ing environments. However, current FaaS platforms struggle to meet strict latency requirements for real-time applications. This study proposes an open-source prototype for a real-time FaaS system that supports both real-time and non-real-time func tions, prioritizing time-critical workloads. Using simulated bal ancing robots with PID controllers, we evaluate performance under various scheduling strategies, including Completely Fair Scheduling and Earliest Deadline First. Results show that the proposed framework effectively supports real-time execution with improved resource utilization and reduced deadline misses.

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