Junctiond: Extending FaaS Runtimes with Kernel-Bypass

TL;DR

Junctiond, the integration of Junction with faasd, reduces median and P99 latency by 37.33% and 63.42%, respectively, and can handle 10 times more throughput while decreasing latency by 2x at the median and 3.5 times at the tail.

Abstract

This report explores the use of kernel-bypass networking in FaaS runtimes and demonstrates how using Junction, a novel kernel-bypass system, as the backend for executing components in faasd can enhance performance and isolation. Junction achieves this by reducing network and compute overheads and minimizing interactions with the host operating system. Junctiond, the integration of Junction with faasd, reduces median and P99 latency by 37.33% and 63.42%, respectively, and can handle 10 times more throughput while decreasing latency by 2x at the median and 3.5 times at the tail.

Figures (6)

• Figure 1: Common FaaS architecture.
• Figure 2: Architecture of faasd.
• Figure 3: Architecture of Junction.
• Figure 4: Extending faasd architecture with junctiond.
• Figure 5: faasd faasd latency distribution as observed from the gateway for 100 sequential invocations to an AES function vhivevswarm. Junction significantly improves the median and tail latency.