Date: Tue, 31 Jan 2006 20:43:58 -0500 From: Kurt Miller <kurt@intricatesoftware.com> To: freebsd-threads@freebsd.org, Daniel Eischen <deischen@freebsd.org> Subject: Re: kse: high prio threads starving low prio threads Message-ID: <200601312043.59043.kurt@intricatesoftware.com> In-Reply-To: <Pine.GSO.4.43.0601312022180.4643-100000@sea.ntplx.net> References: <Pine.GSO.4.43.0601312022180.4643-100000@sea.ntplx.net>
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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. > > > > Is this the expected behavior of kse? > > It is the expected behavior for any POSIX threads library > that supports SCHED_FIFO and priorities and also running > on a system with one scheduling allocation domain (one CPU). > libthr does not support posix priority scheduling. Thanks for the reply. I realized that after sending the message. The jck test is flawed and we will be appealing it with Sun. > > > > Is there a work-around to the starving issue? > > It is working as it should. Recode it not to use priorities > if that is what you want. >
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