Date: Fri, 19 Nov 2010 07:11:47 -1000 From: Clifton Royston <cliftonr@lava.net> To: Vincent Hoffman <vince@unsane.co.uk> Cc: Eric Masson <emss@free.fr>, freebsd-performance@freebsd.org, Stable <freebsd-stable@freebsd.org> Subject: Re: TTY task group scheduling Message-ID: <20101119171147.GA7166@lava.net> In-Reply-To: <4CE6874C.1060204@unsane.co.uk> References: <20101118182852.GR63683@over-yonder.net> <20101118185635.GA43706@freebsd.org> <20101118170623.7f9c14f3@kan.dnsalias.net> <AANLkTik6pnd-JCjkGZv3Dr7SjfwAgyqM=J8FPotM2-BD@mail.gmail.com> <20101118233731.GA10392@freebsd.org> <4CE5BA37.20604@freebsd.org> <20101119001710.GA14641@freebsd.org> <20101119094207.00004cb4@unknown> <864obdeb85.fsf@srvbsdfenssv.interne.associated-bears.org> <4CE6874C.1060204@unsane.co.uk>
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On Fri, Nov 19, 2010 at 02:18:52PM +0000, Vincent Hoffman wrote: > On 19/11/2010 12:42, Eric Masson wrote: > > Bruce Cran <bruce@cran.org.uk> writes: > > > > Hello, > > > >> Google suggests that the work was a GSoC project in 2005 on a pluggable > >> disk scheduler. > > It seems that something similar has found its way in DFlyBSD, dsched. > And indeed to FreeBSD, man gsched. Added sometime round April > http://svn.freebsd.org/viewvc/base/head/sys/geom/sched/README?view=log Apart from the other comments on gsched, disk I/O scheduling is a totally different animal than {thread,process,task} scheduling, even when it comes to I/O-bound tasks. -- Clifton P.S. Trimmed -current off the CC line; crossing 3 lists seems rather superfluous. -- Clifton Royston -- cliftonr@iandicomputing.com / cliftonr@lava.net President - I and I Computing * http://www.iandicomputing.com/ Custom programming, network design, systems and network consulting services
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