PAM: A Novel Performance/Power Aware Meta-Scheduler for Multi-Core Systems

Sharing resources such as caches and main memory bandwidth in multi-core systems requires a more sophisticated scheduling scheme which takes the characteristics of such systems into account. PAM is a lowoverhead, user-level meta-scheduler which does not require any hardware or software changes. In particular, it operates by detecting resource congestions and providing guidelines to the standard system scheduler by limiting the assignment of processes to subsets of available cores. PAM contains a cache model that it uses to predict the impact of new schedules. PAM can be used to improve the system along three dimensions: performance, power, and energy consumption (and any combination of these three). On our prototype, we show individual benchmarks can improve up to 33% and the overall system performance can be improved by as much as 14%.

By: Mohammad Banikazemi; Dan Poff; Bulent Abali

Published in: RC24463 in 2008


This Research Report is available. This report has been submitted for publication outside of IBM and will probably be copyrighted if accepted for publication. It has been issued as a Research Report for early dissemination of its contents. In view of the transfer of copyright to the outside publisher, its distribution outside of IBM prior to publication should be limited to peer communications and specific requests. After outside publication, requests should be filled only by reprints or legally obtained copies of the article (e.g., payment of royalties). I have read and understand this notice and am a member of the scientific community outside or inside of IBM seeking a single copy only.


Questions about this service can be mailed to .