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Phase-based tuning for better utilization of performance-asymmetric multicore processors

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2 Author(s)
Sondag, T. ; Dept. of Comput. Sci., Iowa State Univ., Ames, IA, USA ; Rajan, H.

The latest trend towards performance asymmetry among cores on a single chip of a multicore processor is posing new challenges. For effective utilization of these performance-asymmetric multicore processors, code sections of a program must be assigned to cores such that the resource needs of code sections closely matches resource availability at the assigned core. Determining this assignment manually is tedious, error prone, and significantly complicates software development. To solve this problem, we contribute a transparent and fully-automatic process that we call phase-based tuning which adapts an application to effectively utilize performance-asymmetric multicores. Compared to the stock Linux scheduler we see a 36% average process speedup, while maintaining fairness and with negligible overheads.

Published in:

Code Generation and Optimization (CGO), 2011 9th Annual IEEE/ACM International Symposium on

Date of Conference:

2-6 April 2011

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