Brandon Lucia, Luis Ceze, Karin Strauss, Shaz Qadeer, and Hans-J. Boehm
We argue in this paper that concurrency errors should be treated as exceptions, i.e., have fail-stop behavior and precise semantics. We propose an exception model based on conflict of synchronization-free regions, which precisely detects a broad class of data-races. We show that our exceptions provide enough guarantees to simplify high-level programming language semantics and debugging, but are significantly cheaper to enforce than traditional data-race detection. To make the performance cost of enforcement negligible, we propose architecture support for accurately detecting and precisely delivering these exceptions. We evaluate the suitability of our model as well as the behavior of our architectural mechanisms using the PARSEC benchmark suite and commercial applications. Our results show that the exception model largely reflects how programmers are already writing code and that the main memory, traffic and performance overheads of the enforcement mechanisms we propose are very low.
In ISCA 2010 (International Symposium on Computer Architecture)
Publisher Association for Computing Machinery, Inc.
Copyright © 2007 by the Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from Publications Dept, ACM Inc., fax +1 (212) 869-0481, or firstname.lastname@example.org. The definitive version of this paper can be found at ACM’s Digital Library --http://www.acm.org/dl/.