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Date: Sat, 16 Aug 2014 15:40:13 +1000 From: Con Kolivas <kernel@...ivas.org> To: linux-kernel@...r.kernel.org Subject: [ANNOUNCE] BFS CPU scheduler v0.450 with SMT nice support for linux-3.16 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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