From owner-freebsd-doc@freebsd.org Tue Mar 6 01:27:55 2018 Return-Path: Delivered-To: freebsd-doc@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id EAC67F3D422 for ; Tue, 6 Mar 2018 01:27:54 +0000 (UTC) (envelope-from stackyjoe@gmail.com) Received: from mail-yw0-x22e.google.com (mail-yw0-x22e.google.com [IPv6:2607:f8b0:4002:c05::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 7772F7849C for ; Tue, 6 Mar 2018 01:27:54 +0000 (UTC) (envelope-from stackyjoe@gmail.com) Received: by mail-yw0-x22e.google.com with SMTP id j143so6378663ywb.4 for ; Mon, 05 Mar 2018 17:27:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=3uTTsVKDrhF3dDiTCXQcgp6NA1BM1x/1/wpNJvbhBnc=; b=S/tLriphK5jIhaSK48xK+kKrlhLO4ZMUp6crpEj3ZWkGyHUbd3r9G1nAlwyGJXHKBX j9vMa12nBnjfqqMJPb2mrYnwR6NLu51zzFTKswprp0L9biA/puYlpVtjClhi5dg2VulP 56XbFfHYS3Mezc2Mm7d2+vOv2naoUvbvEFpVqaxQt78KGPU0BxeY/7cV0sA+WkqpRco2 SEdl77aGAuAEOKgFCoDYCVzCJ+lJLiosHGR2gc3FmQxGw9Oma1HnN+tfW/B7+vUb6eNG KY3lR4Gj8ioBxc4mFJyZIPvYLmf+dy0ogVgNHnECkvjuNZeYVe6Araw8pFhAWmf2HcBp XVgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=3uTTsVKDrhF3dDiTCXQcgp6NA1BM1x/1/wpNJvbhBnc=; b=eDN38M0KqPYYXA8mkJpUsvQVglVQr9l0RhpWWCVZcR5f0vdF04FcN5zncr/Eep/nhk Br7U45NIM+/G5S3Ql2IkxruTSryiPlUSb+9KVcit/jwx1NDhMLhC7qxydM97PBWKjEmu lc/aqucNDq2XLPGbKHWWb1/5CFv2CHG5O+mOBuliSH0yudPNxwPUVpkYHflQkIhIw8dv 4/wBPCDM7i3Fsrc9lyKM09GAJ2x9j/Vtvrch/MEhY72nI+2nuRDBJhSwBRg3d2Wdb7es fPJK98gebrTroVz/EpqDnpr+mqTVbF9CSChfE1GC1h09KN+3b2JpY+6OZ4Tdc1c/Z94Q qNsw== X-Gm-Message-State: APf1xPCs197Id6qcmgVUh2vBrNBcLfdy5LmWz/g93Vmnr0dzr4QUc4CT TbQGvB+Ehf81tmTVOccij/tJX8XWeoWrl5nWgiyNqg== X-Google-Smtp-Source: AG47ELsPxIZeBOGEsJGlwTUqFtwfMOUlt5v7sU3Y9XaR/326W7s+vTp0CZbsAZ0NxOUN1t9XDmpff61SJ5iCthy/lLs= X-Received: by 10.129.128.67 with SMTP id q64mr10568076ywf.376.1520299673843; Mon, 05 Mar 2018 17:27:53 -0800 (PST) MIME-Version: 1.0 Received: by 2002:a25:b109:0:0:0:0:0 with HTTP; Mon, 5 Mar 2018 17:27:53 -0800 (PST) From: Joe Berner Date: Mon, 5 Mar 2018 19:27:53 -0600 Message-ID: Subject: ULE scheduler documentation To: freebsd-doc@freebsd.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-doc@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Documentation project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Mar 2018 01:27:55 -0000 Howdy, I have been considering* trying write a 'fair scheduler' for the FreeBSD kernel, however to do this I need to understand what's already there and how it all works. Are there nice mid-level pieces of documentation of the scheduler? If such documentation does not exist, is documentation on the scheduler independently of interest to people? As a related question, are there meaningful comparisons of different scheduler algorithms in different real world scenarios? The closest I've found is a paper of Abaffy-Kraj=C4=8Dovi=C4=8D, however I'm not equipped to understand whether their methodology is good or bad. *: The more research I've done the less clear it is that ULE is insufficient, so it's all sort of up in the air. Joe