Date: Tue, 31 Jan 2006 20:48:54 -0500 (EST) From: Daniel Eischen <deischen@freebsd.org> To: Kurt Miller <kurt@intricatesoftware.com> Cc: freebsd-threads@freebsd.org Subject: Re: kse: high prio threads starving low prio threads Message-ID: <Pine.GSO.4.43.0601312046140.4643-100000@sea.ntplx.net> In-Reply-To: <200601312043.59043.kurt@intricatesoftware.com>
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On Tue, 31 Jan 2006, Kurt Miller wrote:
> On Tuesday 31 January 2006 8:28 pm, Daniel Eischen wrote:
> > On Tue, 31 Jan 2006, Kurt Miller wrote:
> >
> > > I'm working on 1.5 jdk certification on 5.4 and 6.0. One of the
> > > jck tests hangs because a high priority thread that is yielding
> > > is starving the lower priority threads. The following program
> > > demonstrates this problem. Using libthr the program finishes.
> > > Using kse hangs using all three scheduling policies.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
I missed this part previously. Our default scheduling policy
(SCHED_OTHER) is SCHED_RR and supports thread priorities. This
is allowed by POSIX, so the behavior is also as expected.
--
DE
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