From owner-freebsd-threads@FreeBSD.ORG  Wed Jun 15 09:16:03 2005
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Date: Wed, 15 Jun 2005 17:17:55 +0800
From: David Xu <davidxu@freebsd.org>
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Cc: freebsd-threads@freebsd.org
Subject: Re: IntlTest hangs on FreeBSD (TestThreadedIntl) (PR#1141)
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Have you tried it with libthr on -CURRENT ?

David Xu

-----Original Message-----
From: owner-freebsd-threads@freebsd.org
[mailto:owner-freebsd-threads@freebsd.org]On Behalf Of Mikhail T.
Sent: 2005年6月14日 10:42
To: George Rhoten; freebsd-threads@FreeBSD.org
Subject: Re: IntlTest hangs on FreeBSD (TestThreadedIntl) (PR#1141)


= This is reproducable on the sourceforge.net NetBSD machine by 
executing the
following:
=
= My initial guess is that it seems to be an OS thread scheduler bug.
= The main process spins in a loop without sleeping and frequently locks
= the global mutex while waiting for the other threads to finish. None
= of the other threads get enough time because they are all waiting for
= the global mutex lock from the main process thread when its their
= turn. The main process thread is hoging the global mutex while it's in
= its loop. It's not a deadlock, it's just a type of thread scheduling
= that doesn't happen on other operating systems.

Whether it is a bug or a legal oddity, our threads (CC-ed) people would
love to hear about it...

= Adding a sleep() or a yield statement in the main thread of the test
= allows the test to finish. The fix will be available in ICU 3.4.

-mi

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