Feedback-driven threading: power-efficient and high-performance execution of multi-threaded workloads on CMPs

Extracting high-performance from the emerging Chip Multiprocessors (CMPs) requires that the application be divided into multiple threads. Each thread executes on a separate core thereby increasing concurrency and improving performance. As the number of cores on a CMP continues to increase, the performance of some multi-threaded applications will benefit from the increased number of threads, whereas, the performance of other multi-threaded applications will become limited by data-synchronization and off-chip bandwidth. For applications that get limited by datasynchronization, increasing the number of threads significantly degrades performance and increases on-chip power. Similarly, for applications that get limited by off-chip bandwidth, increasing the number of threads increases on-chip power without providing any performance improvement. Furthermore, whether an application gets limited by data-synchronization, or bandwidth, or neither depends not only on the application but also on t...

• Type: Conference
• Year: 2008
• Where: ASPLOS
• Authors: M. Aater Suleman, Moinuddin K. Qureshi, Yale N. Patt
• Keywords: ASPLOS 2008, On-chip Power, Performance, Programming Languages, Threads