Cart (Loading....) | Create Account
Close category search window
 

Increasing the energy efficiency of TLS systems using intermediate checkpointing

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)

With the advent of Chip Multiprocessors (CMPs), improving performance relies on the programmers/compilers to expose thread level parallelism to the underlying hardware. However, this is a difficult and error-prone process for the programmers, while state of the art compiler techniques are unable to provide significant benefits for many classes of applications. An alternative is offered by systems that support Thread Level Speculation (TLS), which relieve the programmer and compiler from checking for thread dependences and instead use the hardware to enforce them. Unfortunately, TLS suffers from power inefficency because data misspeculations cause threads to roll back to the beginning of the speculative task. For this reason intermediate check-pointing of TLS threads has been proposed. When a violation does occur, we now have to roll back to a checkpoint before the violating instruction and not to the start of the task. However, previous work omits study of the microarchitectural details and implementation issues that are essential for effective checkpointing. In this paper we study checkpointing on a state-of-the art TLS system. We systematically study the costs associated with checkpointing and analyze the tradeoffs. We also propose changes to the TLS mechanism to allow effective checkpointing. Further, we establish the need for accurately identifying points in execution that are appropriate for checkpointing and analyze various techniques for doing so in terms of both effectiveness and viability. We propose program counter based and hybrid predictors and show that they outperform previous proposals. Placing checkpoints based on dependence predictors results in power improvements while maintaining the performance advantage of TLS. The checkpointing system proposed achieves an energy saving of up to 14%, with an average of 7% over normal TLS execution.

Published in:

High Performance Computing (HiPC), 2011 18th International Conference on

Date of Conference:

18-21 Dec. 2011

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.