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SCHEDULE: NOV 16-21, 2014
When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.
Fence Scoping
SESSION: Memory and Microarchitecture
EVENT TYPE: Papers
TIME: 10:30AM - 11:00AM
SESSION CHAIR: Suzanne Rivoire
AUTHOR(S):Changhui Lin, Vijay Nagarajan, Rajiv Gupta
ROOM:391-92
ABSTRACT:
We observe that fence instructions used by programmers are usually only intended to order memory accesses within a limited scope. Based on this observation, we propose the concept fence scope which defines the scope within which a fence enforces the order of memory accesses, called scoped fence (S-Fence). S-Fence is a customizable fence, which enables programmers to express ordering demands by specifying the scope of fences when they only want to order part of memory accesses. At runtime, hardware uses the scope information conveyed by programmers to execute fence instructions in a manner that imposes fewer memory ordering constraints than a traditional fence, and hence improves program performance. Our experimental results show that the benefit of S-Fence hinges on the characteristics of applications and hardware parameters. A group of lock-free algorithms achieve peak speedups ranging from 1.13x to 1.34x; while full applications achieve speedups ranging from 1.04x to 1.23x.
Chair/Author Details:
Suzanne Rivoire (Chair) - Sonoma State University
Changhui Lin - University of California, Riverside
Vijay Nagarajan - University of Edinburgh
Rajiv Gupta - University of California, Riverside
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