{"updated":"2025-01-19T10:27:21.833613+00:00","metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00232383","sets":["1164:1867:11465:11510"]},"path":["11510"],"owner":"44499","recid":"232383","title":["コピーオンライトを考慮したHugepage管理機構"],"pubdate":{"attribute_name":"公開日","attribute_value":"2024-02-12"},"_buckets":{"deposit":"5b41b5a0-19a9-4a9f-a7db-69cad18c044b"},"_deposit":{"id":"232383","pid":{"type":"depid","value":"232383","revision_id":0},"owners":[44499],"status":"published","created_by":44499},"item_title":"コピーオンライトを考慮したHugepage管理機構","author_link":["628515","628516"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"コピーオンライトを考慮したHugepage管理機構"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"ビッグデータ","subitem_subject_scheme":"Other"}]},"item_type_id":"4","publish_date":"2024-02-12","item_4_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京農工大学"},{"subitem_text_value":"東京農工大学"}]},"item_4_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"Tokyo University of Agriculture and Technology","subitem_text_language":"en"},{"subitem_text_value":"Tokyo University of Agriculture and Technology","subitem_text_language":"en"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_publisher":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"情報処理学会","subitem_publisher_language":"ja"}]},"publish_status":"0","weko_shared_id":-1,"item_file_price":{"attribute_name":"Billing file","attribute_type":"file","attribute_value_mlt":[{"url":{"url":"https://ipsj.ixsq.nii.ac.jp/record/232383/files/IPSJ-OS24162014.pdf","label":"IPSJ-OS24162014.pdf"},"date":[{"dateType":"Available","dateValue":"2026-02-12"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-OS24162014.pdf","filesize":[{"value":"3.7 MB"}],"mimetype":"application/pdf","priceinfo":[{"tax":["include_tax"],"price":"660","billingrole":"5"},{"tax":["include_tax"],"price":"330","billingrole":"6"},{"tax":["include_tax"],"price":"0","billingrole":"11"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"bf74e13c-f0ff-4844-941d-d804779227f6","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2024 by the Information Processing Society of Japan"}]},"item_4_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"笠原, 一真"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"山田, 浩史"}],"nameIdentifiers":[{}]}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10444176","subitem_source_identifier_type":"NCID"}]},"item_4_textarea_12":{"attribute_name":"Notice","attribute_value_mlt":[{"subitem_textarea_value":"SIG Technical Reports are nonrefereed and hence may later appear in any journals, conferences, symposia, etc."}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_18gh","resourcetype":"technical report"}]},"item_4_source_id_11":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2188-8795","subitem_source_identifier_type":"ISSN"}]},"item_4_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"メモリの大容量化及びアプリケーションのメモリ使用量増大化に伴い，仮想アドレスを物理アドレスへ変換するための時間の増加が問題となっている．これを解決するために 1 ページ当たりのサイズを大きくした Hugepage が考案され，これを用いることでアドレス変換時間を短縮することができる．また Hugepage の活用方法も提案され，Linux では自動的に Hugepage を割り当てる THP がサポートされている．しかし，既存の手法では Hugepage の Copy-on-Write (CoW) に伴う性能劣化が生じ得る．Linux ではバージョンによって Hugepage に対する CoW 方法が異なるが，それぞれ特定のメモリアクセスパターンによって性能が劣化する場合がある．そこで，本研究ではアプリケーションのメモリアクセス特性によって CoW 方法を切り替える手法を提案する．提案手法ではプロセスからメモリアクセスパターンを取得し，それに応じた CoW ポリシーを施行する．これにより，性能劣化を抑えつつ Hugepage の恩恵を受けることが可能になる．提案手法を実現するために，メモリアクセス特性を複数のケースに分類しそれぞれに適した CoW ポリシーを明らかにする．提案手法を Linux 5.10.25 に実装して行った評価実験の結果，性能の劣化を防ぎつつアドレス変換速度を向上させた．また，3 つの real-world アプリケーション (Redis, AFL, SQLite) を用いた実験では，提案手法が最大で 248% の性能向上を達成した．","subitem_description_type":"Other"}]},"item_4_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"13","bibliographic_titles":[{"bibliographic_title":"研究報告システムソフトウェアとオペレーティング・システム（OS）"}],"bibliographicPageStart":"1","bibliographicIssueDates":{"bibliographicIssueDate":"2024-02-12","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"14","bibliographicVolumeNumber":"2024-OS-162"}]},"relation_version_is_last":true,"weko_creator_id":"44499"},"created":"2025-01-19T01:33:13.139352+00:00","id":232383,"links":{}}