By Topic

An instruction fetch policy handling L2 cache misses in SMT processors

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

3 Author(s)
Caixia Sun ; Coll. of Comput., National Univ. of Defense Technol., Hunan ; Hongwei Tang ; Minxuan Zhang

In simultaneous multithreading (SMT) processors, co-scheduled threads share the processor's resources, but at the same time compete for them. A thread missing in L2 cache may occupy most of available resources for a long time, causing other threads to run slower than they could or even stall because of lack of resources. As a result, the overall performance of SMT processors is degraded. In this paper, we propose a novel fetch policy called MFP (multiple fetch priorities) to prevent the negative effects caused by L2 cache misses. In our policy, there are three fetch priority levels for each thread and threads are assigned different fetch priority based on their cache behaviors. Each cycle, MFP fetches instructions from the threads with the highest priority. Results show that our policy outperforms previously proposed fetch policies for all types of workloads, especially for memory bounded workloads, whether using IPC as a metric or using the harmonic mean as a metric. Results also tell that our policy shows different degrees of improvement over other fetch policies. The increment over PDG is greatest, reaching 19.2% in throughput and 27.7% in Hmean on average

Published in:

High-Performance Computing in Asia-Pacific Region, 2005. Proceedings. Eighth International Conference on

Date of Conference:

1-1 July 2005