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cとosに関するmasterqのブックマーク (3)
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masterq 2024/11/27
"The logic of Pip is implemented in Gallina — the language of the Coq proof assistant — and it is in the process of being equipped with a formal proof that it ensures memory isolation. For efficiency, it is automatically translated into freestanding C code."- coq
- proof
- verify
- kernel
- c
- あとで読む
- os
リンク -
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非同期入出力の残念な現状
asynchronous disk I/O | libtorrent blog Libtorrent experience - the poor state of async disk IO | Hacker News libtorrentの作者が、ディスクI/Oをパフォーマンスを向上させるために非同期I/Oを試した結果、どの環境でも残念なので、ブロックI/Oをスレッドプールで行う擬似非同期I/Oで実装したとブログを書いている。その問題について、Hacker Newsでも議論されている。 非同期I/Oは、話を聞くとたのもしい機能に思える。読み書きが完了するまでブロックせずに、完了したらOSが通知するという仕組みだ。 問題は、その実装がどの環境でも貧弱だという事だ。 環境というのは、主にOS側のことだ。多くのモダンなOSは非同期I/Oを提供している。特に著名なのがみっつある。 Linux A
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