Stratus: Clouds with Microarchitectural Resource Management

Authors: 

Kaveh Razavi, ETH Zürich; Animesh Trivedi, VU Amsterdam

Abstract: 

The emerging next generation of cloud services like Granular and Serverless computing are pushing the boundaries of the current cloud infrastructure. In order to meet the performance objectives, researchers are now leveraging low-level hardware microarchitectural resources in clouds. At the same time these resources are also a major source of security problems that can compromise the confidentiality and integrity of sensitive data in multi-tenant shared cloud infrastructures. The core of the problem is the lack of isolation due to the unsupervised sharing of microarchitectural resources across different performance and security boundaries. In this paper, we introduce Stratus clouds that treat the isolation on microarchitectural elements as the key design principle when allocating cloud resources. This isolation improves both performance and security, but at the cost of reducing resource utilization. Stratus captures this trade-off using a novel abstraction that we call isolation credit, and show how it can help both providers and tenants when allocating microarchitectural resources using Stratus’s declarative interface. We conclude by discussing the challenges of realizing Stratus clouds today.

Open Access Media

USENIX is committed to Open Access to the research presented at our events. Papers and proceedings are freely available to everyone once the event begins. Any video, audio, and/or slides that are posted after the event are also free and open to everyone. Support USENIX and our commitment to Open Access.

BibTeX
@inproceedings {254118,
author = {Kaveh Razavi and Animesh Trivedi},
title = {Stratus: Clouds with Microarchitectural Resource Management},
booktitle = {12th {USENIX} Workshop on Hot Topics in Cloud Computing (HotCloud 20)},
year = {2020},
url = {https://www.usenix.org/conference/hotcloud20/presentation/razavi},
publisher = {{USENIX} Association},
month = jul,
}

Presentation Video