{"created":"2023-06-20T15:11:31.173432+00:00","id":41196,"links":{},"metadata":{"_buckets":{"deposit":"8d5b35b7-c8e0-4571-949b-67f800f56f9a"},"_deposit":{"created_by":1,"id":"41196","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"41196"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00041196","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["451105","451107","451106","451104"],"item_3_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Efficiency of a parallel computer with 3-dimensional skew matrices"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1993-08","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"47","bibliographicPageStart":"1","bibliographicVolumeNumber":"1211","bibliographic_titles":[{"bibliographic_title":"航空宇宙技術研究所報告"},{"bibliographic_title":"Technical Report of National Aerospace Laboratory","bibliographic_titleLang":"en"}]}]},"item_3_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"並列計算機の性能・有用性を調べることを目的とし128×128台の演算器を並べた並列計算機を想定し、その動作をクロックレベルで模擬するシミュレータおよび処理手続きを記述するためのアセンブラを開発し下記のことを行い並列計算機の性能評価についてまとめた。流れ場解析問題を並列計算機で処理する時、境界条件の設定手続きが内部格子点の手続きと異なるため多くの演算器を凍結することがある。しかし3次元問題ではデータ構造の工夫によりその凍結を回避することが可能である。問題は回避した時の性能をどこまで改善できるかにある。そこで立方体空間内(Cavity)の流れ場解析プログラムをアセンブラを用いて並列計算機に移植し、そのプログラム命令を並列計算機のシミュレータで追跡し、1台の演算器による処理時間と128×128台の演算器によるそれとを比較し、演算性能について調べその問題点を抽出した。次ぎに境界条件の設定についてSkewマトリックスによるデータ構造の改良を行い、その改善度を再度シミュレータで確認した。さらに並列計算機の性能について定式化を行いデータ構造の改良と性能向上との関係を明らかにした。","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"To examine the efficiency and applicability of a parallel computer system, a software program was designed and developed which simulates a massive parallel computer system with 128 x 128 processing elements. The software simulates the computer's operation at the clock level, whereas the assembly language describes its execution procedures. Setting the boundary condition in a fluid dynamics program in a parallel computer often causes the processing elements to freeze because the boundary grid point procedures differ from the inner-grid point procedures. First, the operation was evaluated by comparing the resultant parallel processing time using the test program to the corresponding sequential processing time obtained with a sequential processing element. Next, skew matrices technique was used to avoid freezing of the operation. In addition, efficiency was further evaluated by comparing the parallel processing time using skew matrices to the sequential processing time, and the relation between the data structure and the improved efficiency is described. Finally, the formulation for maximum efficiency of the massive parallel computer, is presented.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0004226000","subitem_description_type":"Other"}]},"item_3_description_33":{"attribute_name":"レポート番号","attribute_value_mlt":[{"subitem_description":"レポート番号: NAL TR-1211","subitem_description_type":"Other"}]},"item_3_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"航空宇宙技術研究所"}]},"item_3_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"National Aerospace Laboratory (NAL)"}]},"item_3_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0389-4010","subitem_source_identifier_type":"ISSN"}]},"item_3_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"航空宇宙技術研究所 数理解析部"},{"subitem_text_value":"航空宇宙技術研究所 数理解析部"}]},"item_3_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Computational Sciences Division"},{"subitem_text_language":"en","subitem_text_value":"National Aerospace Laboratory Computational Sciences Division"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"原田, 公一"}],"nameIdentifiers":[{"nameIdentifier":"451104","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"岩宮, 敏幸"}],"nameIdentifiers":[{"nameIdentifier":"451105","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Harada, Koichi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"451106","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Iwamiya, Toshiyuki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"451107","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-01-27"}],"displaytype":"detail","filename":"naltr01211.pdf","filesize":[{"value":"6.8 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr01211.pdf","url":"https://jaxa.repo.nii.ac.jp/record/41196/files/naltr01211.pdf"},"version_id":"f912d2bd-9e4d-4336-b634-90fb87f5b848"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"3次元Skew配列","subitem_subject_scheme":"Other"},{"subitem_subject":"並列処理","subitem_subject_scheme":"Other"},{"subitem_subject":"並列計算機","subitem_subject_scheme":"Other"},{"subitem_subject":"演算性能","subitem_subject_scheme":"Other"},{"subitem_subject":"計算機処理速度","subitem_subject_scheme":"Other"},{"subitem_subject":"性能評価","subitem_subject_scheme":"Other"},{"subitem_subject":"応用プログラム","subitem_subject_scheme":"Other"},{"subitem_subject":"境界条件","subitem_subject_scheme":"Other"},{"subitem_subject":"データ構造","subitem_subject_scheme":"Other"},{"subitem_subject":"3次元ナビエ・ストークス方程式","subitem_subject_scheme":"Other"},{"subitem_subject":"アセンブラ","subitem_subject_scheme":"Other"},{"subitem_subject":"処理手続","subitem_subject_scheme":"Other"},{"subitem_subject":"流体流","subitem_subject_scheme":"Other"},{"subitem_subject":"数値シミュレータ","subitem_subject_scheme":"Other"},{"subitem_subject":"three dimensional Skew matrices","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"parallel processing","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"parallel computer","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"arithmetic performance","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"computer processing speed","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"performance evaluation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"application program","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"boundary condition","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"data structure","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"three dimensional","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Navier.Stokes equation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"assembler","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"processing procedure","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"fluid flow","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"numerical simulator","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"technical report","resourceuri":"http://purl.org/coar/resource_type/c_18gh"}]},"item_title":"3次元Skew配列による並列計算機の性能","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"3次元Skew配列による並列計算機の性能"}]},"item_type_id":"3","owner":"1","path":["1893","1917"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"41196","relation_version_is_last":true,"title":["3次元Skew配列による並列計算機の性能"],"weko_creator_id":"1","weko_shared_id":1},"updated":"2023-06-20T19:12:18.422420+00:00"}