{"created":"2023-06-20T15:10:44.041657+00:00","id":40308,"links":{},"metadata":{"_buckets":{"deposit":"9f39d19d-6bb5-4d95-81bf-8904b015ce48"},"_deposit":{"created_by":1,"id":"40308","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"40308"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00040308","sets":["1887:1893","1896:1898:1913:1917"]},"author_link":["447260","447261"],"item_3_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"ローカルメモリアクセスにおけるNWT計算機システムの特性パラメータ"}]},"item_3_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1998-10","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"22","bibliographicPageStart":"1","bibliographicVolumeNumber":"1361T","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":"1993年2月に運用を開始した航空宇宙技術研究所の数値風洞(NWT)計算機システムは2台の制御計算機、n台の要素計算機(nは運用開始時において140台、現在は166台)並びにクロスバーネットワークから構成されていて、分散メモリ型メッセージパッシング方式のMIMD(複数命令列複数データ方式)計算機として動作する。各要素計算機自体はベクトル計算機である。本稿はこのNWTの運用開始初期の1993年4月から6月の間に測定した、NWTの基本的処理性能を表す特性パラメータ(τ(sub ∞)、n(sub 1/2))、およびローカル・メモリ・アクセスにおけるNWTの並列処理性能を表す特性パラメータ(τ(sub ∞)、s(sub 1/2))を報告した。ここではτ(sub ∞)は最大処理性能を、n(sub 1/2)はτ(sub ∞/2)を達成するに必要なベクトル長を、s(sub 1/2)はτ(sub ∞/2)を達成するに必要なグレイン・サイズを表す。更に、得られた結果の意味について考察するとともに、いくつかのハードウェア・パラメータについて推定する。なお、本稿で示した値はその後のNWTシステム・ソフトウェアの改善努力によって、大幅に改善されたが、その成果は稿をあらためて報告する。","subitem_description_type":"Abstract"}]},"item_3_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"The NWT (Numerical Wind Tunnel) computer system available at the NAL since February 1993 comprises two system administrators, n processing elements (where n was 140 at the beginning, and is 166 at present) and a crossbar network, and operates as a distributed-memory message-passing MIMD (Multiple Instruction and Multiple Data stream) computer. Each processing element itself is a vector computer. This paper reports measurements of two pairs of the characteristic parameters, (tau(sub infinity), n(sub 1/2)) and (tau(sub infinity), s(sub 1/2)), of the NWT with SIMD (Single Instruction and Multiple Data stream) computing on a single processing element and with MIMD computing in the local memory access, respectively. Furthermore the significance of the obtained results is interpreted, and several hardware parameters are estimated. The obtained results in this paper apply only to the NWT system software during the period April to June 1993 after which substantial improvements have been achieved with the NWT performance.","subitem_description_type":"Other"}]},"item_3_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0001668000","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-1361T","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"}]},"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"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"畑山, 茂樹"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Hatayama, Shigeki","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"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":"naltr0001361t.pdf","filesize":[{"value":"732.5 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"naltr0001361t.pdf","url":"https://jaxa.repo.nii.ac.jp/record/40308/files/naltr0001361t.pdf"},"version_id":"499af8ba-c238-47de-af90-0446805e68bb"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"ローカルメモリアクセス","subitem_subject_scheme":"Other"},{"subitem_subject":"数値風洞シミュレーション","subitem_subject_scheme":"Other"},{"subitem_subject":"マルチコンピュータシステム","subitem_subject_scheme":"Other"},{"subitem_subject":"並列計算機","subitem_subject_scheme":"Other"},{"subitem_subject":"計算機処理性能","subitem_subject_scheme":"Other"},{"subitem_subject":"ベンチマーク試験","subitem_subject_scheme":"Other"},{"subitem_subject":"並列処理","subitem_subject_scheme":"Other"},{"subitem_subject":"SIMD計算","subitem_subject_scheme":"Other"},{"subitem_subject":"単一命令多重データ処理計算","subitem_subject_scheme":"Other"},{"subitem_subject":"MIMD計算","subitem_subject_scheme":"Other"},{"subitem_subject":"複数命令列複数データ方式計算","subitem_subject_scheme":"Other"},{"subitem_subject":"local memory access","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"numerical wind tunnel simulation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"multicomputer system","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"parallel computer","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"computer processing performance","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"benchmark test","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"parallel processing","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"SIMD computation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"single instruction and multiple data stream computation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"MIMD computation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"multiple instruction and multiple data stream computation","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"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":"The characteristic parameters of the NWT computer system in the local memory access","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"The characteristic parameters of the NWT computer system in the local memory access","subitem_title_language":"en"}]},"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":"40308","relation_version_is_last":true,"title":["The characteristic parameters of the NWT computer system in the local memory access"],"weko_creator_id":"1","weko_shared_id":1},"updated":"2023-06-20T19:15:48.607401+00:00"}