Date: Mon, 30 May 2011 00:22:11 +0200 From: rudo tomori <rudotx@gmail.com> To: soc-status@freebsd.org Subject: BFS scheduler weekly status report Message-ID: <BANLkTimZVwoAhNFYR8_gcxButBnexNqtMA@mail.gmail.com>
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Hi, the goal of my project is to implement a BFS - like scheduler into the FreeBSD. I started off with the original 4.4BSD code, and by iterative modifications I will develop a scheduler that matches the BFS design as specified in http://ck.kolivas.org/patches/bfs/sched-BFS.txt. Last week I have modified the 4.4BSD scheduler to use a single global run-queue. (So not a per-CPU run queue). I have also removed a thread that periodically recalculates the threads' priorities. You can find more info at my project blog site rudot.blog.com Next week I will present the first benchmarks at my project blog. These benchmarks will serve me later for comparisons to see if I am actually improving or decreasing performance after adding some features. I plan to use sysbench and make world for my benchmarking. After that I will probably continue by changing the mapping of thread priorities to a specific priority queue in the global run queue. The BFS uses only 1 queue for all time-sharing processes. rudo
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