Development of real-time audio processing applications for GPGPUs is not without challenges. Parallel processing of audio signals is often constrained by serial dependencies within or between algorithms. On GPGPUs, insufficient data pressure further limits the attainable performance improvements, as it causes inactivity of the GPU cores. In this paper, we analyze the limits of audio processing on GPGPUs and present an approach based on event-driven scheduling, that maximizes data pressure to favour performance improvements. We also present recent enhancements of Audio n-Genie, an open-source development environment for audio-processing applications. By combining Audio n-Genie and the proposed approach, we show that it is possible to increase audio processing speed-up.

Authors: Leidi, Tiziano; Heeb, Thierry; Colla, Marco; Thiran, Jean-Philippe
Affiliations: EPFL, Lausanne, Switzerland; ICIMSI-SUPSI, Manno, Switzerland(See document for exact affiliation information.)
AES Convention: 130 (May 2011) Paper Number: 8417
Publication Date: May 13, 2011 Import into BibTeX
Subject: Audio Signal Processing and Analysis
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=15884

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