Fathom: Reference Workloads for Modern Deep Learning Methods

TL;DR

Fathom provides a collection of eight representative deep learning workloads to analyze their performance characteristics, aiding hardware and software design for more flexible and efficient deep learning systems.

Contribution

This paper introduces Fathom, a benchmark suite of diverse deep learning models, and analyzes their performance to inform hardware and software optimization.

Findings

Identifies key performance bottlenecks in deep learning workloads

Highlights similarities and differences in workload behavior

Provides insights on parallelism effects on scaling

Abstract

Deep learning has been popularized by its recent successes on challenging artificial intelligence problems. One of the reasons for its dominance is also an ongoing challenge: the need for immense amounts of computational power. Hardware architects have responded by proposing a wide array of promising ideas, but to date, the majority of the work has focused on specific algorithms in somewhat narrow application domains. While their specificity does not diminish these approaches, there is a clear need for more flexible solutions. We believe the first step is to examine the characteristics of cutting edge models from across the deep learning community. Consequently, we have assembled Fathom: a collection of eight archetypal deep learning workloads for study. Each of these models comes from a seminal work in the deep learning community, ranging from the familiar deep convolutional neural network of Krizhevsky et al., to the more exotic memory networks from Facebook's AI research group. Fathom has been released online, and this paper focuses on understanding the fundamental performance characteristics of each model. We use a set of application-level modeling tools built around the TensorFlow deep learning framework in order to analyze the behavior of the Fathom workloads. We present a breakdown of where time is spent, the similarities between the performance profiles of our models, an analysis of behavior in inference and training, and the effects of parallelism on scaling.