Redesigning System Software for Shared Hardware

Friday, November 09, 2018
10:00 AM to 11:00 AM
EER 3.646
Free and open to the public

Multi-core processors, data centers, and public clouds make hardware sharing ubiquitous in today's typical computing environments. Multi-tenancy has become common practice. Meanwhile, applications are often designed perceiving themselves the only users of a given platform. While the underlying systems see different reality, they too often fall behind the level of sharing expected in today's infrastructures.

In this talk, I will give an overview of our research in recent years on improving application performance and resource utilization, by redesigning system software to adapt to trends of hardware sharing. We then focus on two projects at very different system levels: (1) RAID+,a new RAID construction mechanism that spreads both normal I/O and

reconstruction workloads to a disk pool much larger than existing RAID arrays, and (2) KPart, a cache allocation strategy that combines cache way sharing and partitioning, to perform workload-aware resource management on multicore processors. Our results show that significant efficiency improvement can be obtained by designing systems considering the diversity in needs of applications running concurrently on top.


Xiaosong Ma

Principal Scientist
Qatar Computing Research Institute

Xiaosong Ma is currently a Principal Scientist at Qatar Computing Research Institute. Her research interests are in the areas of workload characterization, graph processing, distributed/cloud computing, and high-performance storage systems. Xiaosong has published over 90 research papers and currently serves on the editorial board of the Elsevier Journal of Parallel and Distributed Computing and the ACM Transactions on Storage. She received both the DOE Early Career Principal Investigator Award and the NSF CAREER Award, and was named a University of Illinois Department of Computer Science Alumni Distinguished Educator. Xiaosong received her Ph.D. from the University of Illinois at Urbana-Champaign in 2003, and her B.S. from Peking University in 1997.