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| Presentation | 2013-05-21 10:35 Implementation of Speculative Gather System for CMA Rie Uno, Nobuaki Ozaki, Mai Izawa, Akihito Tsusaka, Takaaki Miyajima, Hideharu Amano (Keio Univ.)  RECONF2013-11 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Cool Mega Array (CMA) is a low power reconfigurable processor array for battery driven mobile devices. A prototype chip CMA-1 consists of 8 $times$ 8 PE array and $mu$-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, which sets the timing of collecting operation results from the PE array dynamically, is proposed. By collecting results twice and comparing them, it guarantees the correctness of the operation results and adjusts the gather timing automatically. The system is implemented on the CMA and the overhead is evaluated.The area overhead is about 0.5%, and power consumption is increased only by 2.1%. By adjusting the gather timing automatically, it is possible to gather the certain results even if temperature or supply voltage is changed. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Reconfigurable System / Low Power / / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 113, no. 52, RECONF2013-11, pp. 55-60, May 2013. | |
| Paper # | RECONF2013-11 | |
| Date of Issue | 2013-05-13 (RECONF) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | RECONF2013-11 |
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| Conference Information | |
| Committee | RECONF |
| Conference Date | 2013-05-20 - 2013-05-21 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kochi Prefectural Culture Hall |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Reconfigurable Systems, etc. |
| Paper Information | |
| Registration To | RECONF |
| Conference Code | 2013-05-RECONF |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Implementation of Speculative Gather System for CMA |
| Sub Title (in English) | |
| Keyword(1) | Reconfigurable System |
| Keyword(2) | Low Power |
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| 1st Author's Name | Rie Uno |
| 1st Author's Affiliation | Keio University (Keio Univ.) |
| 2nd Author's Name | Nobuaki Ozaki |
| 2nd Author's Affiliation | Keio University (Keio Univ.) |
| 3rd Author's Name | Mai Izawa |
| 3rd Author's Affiliation | Keio University (Keio Univ.) |
| 4th Author's Name | Akihito Tsusaka |
| 4th Author's Affiliation | Keio University (Keio Univ.) |
| 5th Author's Name | Takaaki Miyajima |
| 5th Author's Affiliation | Keio University (Keio Univ.) |
| 6th Author's Name | Hideharu Amano |
| 6th Author's Affiliation | Keio University (Keio Univ.) |
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| Speaker | Author-1 |
| Date Time | 2013-05-21 10:35:00 |
| Presentation Time | 25 minutes |
| Registration for | RECONF |
| Paper # | RECONF2013-11 |
| Volume (vol) | vol.113 |
| Number (no) | no.52 |
| Page | pp.55-60 |
| #Pages | 6 |
| Date of Issue | 2013-05-13 (RECONF) |
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