TProf: An energy profiler for task-parallel programs

We present TProf, an energy profiling tool for OpenMP-like task-parallel programs. To compute the energy consumed by each task in a parallel application, TProf dynamically traces the parallel execution and uses a novel technique to estimate the per-task energy consumption. To achieve this estimation...

Full description

Saved in:
Bibliographic Details
Published in:Sustainable computing informatics and systems Vol. 5; pp. 1 - 13
Main Authors: Manousakis, Ioannis, Zakkak, Foivos S., Pratikakis, Polyvios, Nikolopoulos, Dimitrios S.
Format: Journal Article
Language:English
Published: Elsevier Inc 01.03.2015
Subjects:
Energy profiling
Parallel programming models
Parallel runtime systems
Task parallelism
Parallel programming models
Energy profiling
Task parallelism
Parallel runtime systems
ISSN:2210-5379
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present TProf, an energy profiling tool for OpenMP-like task-parallel programs. To compute the energy consumed by each task in a parallel application, TProf dynamically traces the parallel execution and uses a novel technique to estimate the per-task energy consumption. To achieve this estimation, TProf apportions the total processor energy among cores and overcomes the limitation of current works which would otherwise make parallel accounting impossible to achieve. We demonstrate the value of TProf by characterizing a set of task parallel programs, where we find that data locality, memory access patterns and task working sets are responsible for significant variance in energy consumption between seemingly homogeneous tasks. In addition, we identify opportunities for fine-grain energy optimization by applying per-task Dynamic Voltage and Frequency Scaling (DVFS).
ISSN:2210-5379
DOI:10.1016/j.suscom.2014.07.004