Date: Tue, 31 Jan 2006 20:28:43 -0500 (EST) From: Daniel Eischen <deischen@freebsd.org> To: kurt@intricatesoftware.com Cc: freebsd-threads@freebsd.org Subject: Re: kse: high prio threads starving low prio threads Message-ID: <Pine.GSO.4.43.0601312022180.4643-100000@sea.ntplx.net> In-Reply-To: <200601311718.11683.lists@intricatesoftware.com>
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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. > > 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. -- DE
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