A speculative gather system for cool mega-array

Rie Uno, Nobuaki Ozaki, Mai Isawa, Akihito Tsusaka, Takaaki Miyajima, Hideharu Amano

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Cool Mega Array (CMA) is a low power reconfigurable processor array for battery driven mobile devices. A prototype chip CMA-1 consists of a 8 × 8 PE (Processing Element) array and a micro-controller for controlling data alignment. Because the PE array of CMA is built with a combinatorial circuit, it does not have a signal which tells that operation in the PE array was completed. A propagate delay of the whole PE array corresponding to the operation time was estimated by using the data path and mapping information in the design stage of the application. The timing information for gathering the data was specified in the microcode of the controller. However, since this timing is fixed, it cannot treat the variation of environment temperature and voltage scaling for the PE array. Here, a speculative gather system is proposed which sets the timing of collecting operation results from the PE array dynamically. By collecting results twice and comparing them, it guarantees the correctness of the operation results and adjusts the gather timing automatically. The speculative gather system is implemented in the CMA, and evaluation results appear that the performance is improved by 25.3% on average with the overhead of 0.5% in area and 3.1% in power consumption.

本文言語English
ホスト出版物のタイトルFPT 2013 - Proceedings of the 2013 International Conference on Field Programmable Technology
ページ346-349
ページ数4
DOI
出版ステータスPublished - 2013 12月 1
イベント2013 12th International Conference on Field-Programmable Technology, FPT 2013 - Kyoto, Japan
継続期間: 2013 12月 92013 12月 11

出版物シリーズ

名前FPT 2013 - Proceedings of the 2013 International Conference on Field Programmable Technology

Other

Other2013 12th International Conference on Field-Programmable Technology, FPT 2013
国/地域Japan
CityKyoto
Period13/12/913/12/11

ASJC Scopus subject areas

  • ソフトウェア

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