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2010
IEEE

ScalableBulk: Scalable Cache Coherence for Atomic Blocks in a Lazy Environment

10 years 9 months ago
ScalableBulk: Scalable Cache Coherence for Atomic Blocks in a Lazy Environment
Recently-proposed architectures that continuously operate on atomic blocks of instructions (also called chunks) can boost the programmability and performance of shared-memory multiprocessing. However, they must support chunk operations very efficiently. In particular, in lazy conflict-detection environments, it is key that they provide scalable chunk commits. Unfortunately, current proposals typically fail to enable maximum overlap of conflict-free chunk commits. This paper presents a novel directory-based protocol that enables highly-overlapped, scalable chunk commits. The protocol, called ScalableBulk, builds on the previously-proposed BulkSC protocol. It introduces three general hardware primitives for scalable commit: preventing access to a set of directory entries, grouping directory modules, and initiating the commit optimistically. Our results with SPLASH-2 and PARSEC codes with up to 64 processors show that ScalableBulk enables highly-overlapped chunk commits and delivers scal...
Xuehai Qian, Wonsun Ahn, Josep Torrellas
Added 14 Feb 2011
Updated 14 Feb 2011
Type Journal
Year 2010
Where MICRO
Authors Xuehai Qian, Wonsun Ahn, Josep Torrellas
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