X-Recipient: archive-cygwin@delorie.com DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 007253858CDB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com; s=default; t=1712016348; bh=I7xE+aZlnvKMKht2tJIYGYMAHPuyiWTYxLnt/YAi9r0=; h=Date:Subject:To:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=moirrUPcAPe4cSDDC7IfJDvyMwKakUEVl7qEaLm3oZd8rL26DGey15i0QAKMyZvVo n6lHyhmrrcg1rNmlcOKtmoftANRBPlrfRyYpEE0xxUeYkuAbcVudzB02FULUDSguF6 52ThZHMdhZlufzGegTtEWXzFTG1uZ2nwFi8MXBBI= X-Original-To: cygwin@cygwin.com Delivered-To: cygwin@cygwin.com DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CF7583858D20 ARC-Filter: OpenARC Filter v1.0.0 sourceware.org CF7583858D20 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1712016296; cv=none; b=ajqLJngE2zSThkWTM8K70iuBrWPkpUwL39JUoetjU/tOdoIz6A0vDLFI24VUjVZUtQKc4DKicHvROxm1M6G3Eljhib/mIgqbI0P/O9HrRITf57z6OYx1Aj0vtlht8wzFFuOBs+NUBNORHtjp1pGWDxf4QIJhS5id4Tl/pqf3OKc= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1712016296; c=relaxed/simple; bh=Nq4diCawRN87x7xVG59piEKuYK5koNo+2173vtvDjNs=; h=DKIM-Signature:MIME-Version:From:Date:Message-ID:Subject:To; b=LyoAyFLyR1qFXWJo14WE86eXJZ1nXAWAjRjKVo95wK6lxoibwYfAVlBxWv7wkxN5syJY9wtODcSjL/r6bzvCumIylw0u1sw79r2eATULlKZL28XCIRp1qUvasIVqXIoczcZb9Xo+kJKLqHNyJjEZQ5qOTnZArFjxBqtGGQh5nEc= ARC-Authentication-Results: i=1; server2.sourceware.org X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712016293; x=1712621093; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Nq4diCawRN87x7xVG59piEKuYK5koNo+2173vtvDjNs=; b=B3H0OhDL6niY6GbZB6o2L3Fb1PFgpgVCS8CLZl2ENPksWmRGzFlYujjsDTmcQghiUW wkWCokyqNJrFlGqz3nGBkqCxBMMOfenPqd4Qt/tYjGrQ4qNRrbmZPss/rN4A5AZ+xbS6 wHbyS531BGVMKlX8yu9rgoJ39MSAqbebZRyxbX9uqrhFexlxV7+s7AJTfxne4aOTj0Db 1g8yEq/awmm8Dux7ep8/l8OjYUWsrvgGBjvwwzZXIfaQa2RIlqgoDYqZEUh2cByFYBiV GAcMwHrxufMSd2pzCAw6TnK5WmaoZ+VU8U1DOEB7rIMd8fm5IMHy/L2h0X0bfSGfkRMv wcHg== X-Gm-Message-State: AOJu0Yyoarm9QYBgPw1X4x+M/kINzvGDHtQURKc0zY/n2BZiHAqXPXjs 4KFY9GU3jc4Ft0Ls4T2OdIspRZscSKWiDpLQGfYj5f6ORi6ylQtVuA78QT4r4/3zYqQZkzjTa/Y ki3SrTCcPueNZ7z5/SsD0GXLie7pqmiNvc6g= X-Google-Smtp-Source: AGHT+IHlJCHktLYXD4sYqH33Yyg8Mrcb3b1VBwZtU8VTWEnDpeiqDMfZA7fPGlCWl0VOJdhmuR50rVi7xBBuiEDHrz4= X-Received: by 2002:ac2:4438:0:b0:515:bf72:642b with SMTP id w24-20020ac24438000000b00515bf72642bmr15311lfl.16.1712016292697; Mon, 01 Apr 2024 17:04:52 -0700 (PDT) MIME-Version: 1.0 Date: Tue, 2 Apr 2024 02:04:41 +0200 Message-ID: Subject: Cygwin&Win32 file prefetch, block sizes? To: cygwin@cygwin.com X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.30 List-Id: General Cygwin discussions and problem reports List-Archive: List-Post: List-Help: List-Subscribe: , From: Martin Wege via Cygwin Reply-To: Martin Wege Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Cygwin" Hello, Is there any document which describes how Cygwin and Win32 file prefetch and readahead work, and which sizes are used (e.g. always read one full page even if only 16 bytes are requested?)? Quick /usr/bin/stat /etc/profile returns "IO Block: 65536". Does that mean the file's block size is really 64k? Is this info per filesystem, or hardcoded in Cygwin? Thanks, Martin -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple