[ANNOUNCE] BFS CPU scheduler v0.450 with SMT nice support for linux-3.16
From: Con Kolivas
Date: Sat Aug 16 2014 - 02:00:14 EST
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!
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