The ROSS is a workshop aimed at identifying looming problems and discussing promising research solutions in the area of runtime and operating systems for extreme-scale supercomputer systems. Specifically, ROSS focuses on principles and techniques to design, implement, optimize, or operate runtime and operating systems for extreme-scale supercomputing and cloud environments. In addition to typical workshop publications, we encourage novel and possibly immature ideas, provided that they are interesting and on-topic. Well argued position papers are also welcome.

This workshop will consider all aspects of OS and runtime systems at extreme-scale including, but not limited to:

- OS and runtime system scalability on many-node and multi/many-core systems;
- Management of heterogeneous and reconfigurable compute resources, including FPGAs, GPUs, etc;
- Management of emerging post-moore computing architectures, including quantum, neuromorphic, etc;
- Distributed/hybrid/partitioned OSs and runtime systems for supercomputing;
- Analysis and prevention of system noise and performance variability;
- Runtime and operating systems for resource disaggregation;
- Modeling and performance analysis of runtime systems;
- The use of machine learning and AI techniques in the autotuning of system software and resource management;
- OS and runtime considerations for large-volume, high-performance I/O;
- Memory management and emerging memory technologies;
- OS and runtime aspects of HPC in the cloud, convergence of supercomputing and cloud environments;
- Infrastructure for cloud functions and serverless computing in the context of HPC;
- OS and runtime support for emerging workloads such as on-demand or persistent service use cases;
- Virtualization in HPC, including virtual machines and application containers;
- The role of the OS and runtime system in minimizing power usage and energy efficiency;
- OS and runtime impacts of security and trust for HPC.