From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751371AbaHPF7l (ORCPT ); Sat, 16 Aug 2014 01:59:41 -0400 Received: from ipmail06.adl2.internode.on.net ([150.101.137.129]:31408 "EHLO ipmail06.adl2.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750833AbaHPF7k convert rfc822-to-8bit (ORCPT ); Sat, 16 Aug 2014 01:59:40 -0400 From: Con Kolivas To: linux-kernel@vger.kernel.org Subject: [ANNOUNCE] BFS CPU scheduler v0.450 with SMT nice support for linux-3.16 Date: Sat, 16 Aug 2014 15:40:13 +1000 Message-ID: <2233658.OcMy7hG7Vc@hex> User-Agent: KMail/4.13.3 (Linux/3.16.0-ck1; KDE/4.13.3; x86_64; ; ) MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is to announce a resync and update of the Brain Fuck Scheduler, version 0.450 for the latest stable linux kernel. In addition to the usual round of fixes and changes to resync with mainline changes, this release brings a new feature of configurable SMT nice support. The configuration help follows to explain: Enabling Hyperthreading on Intel CPUs decreases the effectiveness of the use of 'nice' levels and different scheduling policies (e.g. realtime) due to sharing of CPU power between hyperthreads. SMT nice support makes each logical CPU aware of what is running on its hyperthread siblings, maintaining appropriate distribution of CPU according to nice levels and scheduling policies at the expense of slightly increased overhead. This code is based on my original idea from ten years ago discussed here: http://lwn.net/Articles/73614/ A full discussion of the rationale and development follows here: http://ck-hack.blogspot.com/2014/08/smthyperthreading-nice-and-scheduling.html The patch against linux-3.16(.x) is available here: http://ck.kolivas.org/patches/bfs/3.0/3.16/3.16-sched-bfs-450.patch A -ck branded linux-3.16-ck1 patch is available here: http://ck.kolivas.org/patches/3.0/3.16/3.16-ck1/ All patches available here: http://ck.kolivas.org/patches Code blog: http://ck-hack.blogspot.com Enjoy! お楽しみください -- -ck