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  1. Proceedings of the 4th International Workshop on Runtime and Operating Systems for Supercomputers (ROSS '14)
  2. mOS: an architecture for extreme-scale operating systems
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mOS: an architecture for extreme-scale operating systems
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mOS: an architecture for extreme-scale operating systems

Content Provider ACM Digital Library
Author Murty, Ravi Keppel, Pardo Wisniewski, Robert W. Riesen, Rolf Inglett, Todd
Abstract $Linux^{®},$ or more specifically, the Linux API, plays a key role in HPC computing. Even for extreme-scale computing, a known and familiar API is required for production machines. However, an off-the-shelf Linux distribution faces challenges at extreme scale. To date, two approaches have been used to address the challenges of providing an operating system (OS) at extreme scale. In the Full-Weight Kernel (FWK) approach, an OS, typically Linux, forms the starting point, and work is undertaken to remove features from the environment so that it will scale up across more cores and out across a large cluster. A Light-Weight Kernel (LWK) approach often starts with a new kernel and work is undertaken to add functionality to provide a familiar API, typically Linux. Either approach however, results in an execution environment that is not fully Linux compatible. mOS (multi Operating System) runs both an FWK (Linux), and an LWK, simultaneously as kernels on the same compute node. mOS thereby achieves the scalability and reliability of LWKs, while providing the full Linux functionality of an FWK. Further, mOS works in concert with Operating System Nodes (OSNs) to offload system calls, e.g., I/O, that are too invasive to run on the compute nodes at extreme-scale. Beyond providing full Linux capability with LWK performance, other advantages of mOS include the ability to effectively manage different types of compute and memory resources, interface easily with proposed asynchronous and fine-grained runtimes, and nimbly manage new technologies. This paper is an architectural description of mOS. As a prototype is not yet finished, the contributions of this work are a description of mOS's architecture, an exploration of the tradeoffs and value of this approach for the purposes listed above, and a detailed architecture description of each of the six components of mOS, including the tradeoffs we considered. The uptick of OS research work indicates that many view this as an important area for getting to extreme scale. Thus, most importantly, the goal of the paper is to generate discussion in this area at the workshop.
Starting Page 1
Ending Page 8
Page Count 8
File Format PDF
ISBN 9781450329507
DOI 10.1145/2612262.2612263
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2014-06-10
Publisher Place New York
Access Restriction Subscribed
Content Type Text
Resource Type Article
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