NDLI: Understanding soft errors in uncore components

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Understanding soft errors in uncore components

Content Provider	ACM Digital Library
Author	Cho, Hyungmin Shepherd, Thomas Cher, Chen-Yong Mitra, Subhasish
Abstract	The effects of soft errors in processor cores have been widely studied. However, little has been published about soft errors in uncore components, such as memory subsystem and I/O controllers, of a System-on-a-Chip (SoC). In this work, we study how soft errors in uncore components affect system-level behaviors. We have created a new mixed-mode simulation platform that combines simulators at two different levels of abstraction, and achieves 20,000x speedup over RTL-only simulation. Using this platform, we present the first study of the system-level impact of soft errors inside various uncore components of a large-scale, multi-core SoC using the industrial-grade, open-source OpenSPARC T2 SoC design. Our results show that soft errors in uncore components can significantly impact system-level reliability. We also demonstrate that uncore soft errors can create major challenges for traditional system-level checkpoint recovery techniques. To overcome such recovery challenges, we present a new replay recovery technique for uncore components belonging to the memory subsystem. For the L2 cache controller and the DRAM controller components of OpenSPARC T2, our new technique reduces the probability that an application run fails to produce correct results due to soft errors by more than 100x with 3.32% and 6.09% chip-level area and power impact, respectively.
Starting Page	1
Ending Page	6
Page Count	6
File Format	PDF
ISBN	9781450335201
DOI	10.1145/2744769.2744923
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2015-06-07
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Simulation Soft error Uncore components Recovery Resilience
Content Type	Text
Resource Type	Article

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