From: "Davies, Greg" <Greg.Davies@Ultra-UEMS.com>
To: <ecos-discuss@sources.redhat.com>
Subject: [ECOS] Pthread problem
Date: Thu, 14 Feb 2008 13:10:00 -0000 [thread overview]
Message-ID: <A25DBA3B0717824BAFD61F81242D5DBDE1A868@exchange.Ultra-UEMS.ca> (raw)
Hi,
I'm having problems when I try to run more than two pthreads at
the same time. This is on a SAM7SE-EK board using the SAM7S-EK eCos
configuration.
The threads start up correctly and I hit the main loop of all of
them. Inside each main loop is a sched_yield() after it's done the main
work. After the last thread yields, control never returns to one of my
threads. I tried taking out all the yields, and letting ecos' preemption
take care of when to switch context, but when I do that, I only ever hit
the main loop of one of my threads. I also thought it might be a problem
with the priority of the created threads being lower than that of the
idle thread, but I haven't explored that possibility yet.
Is there something different about the way pthreads work in eCos
(the same code ran in linux)? I using the library the way I should be,
should I be sleeping instead of yielding? Could there be a configuration
item that could be causing this?
--
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next reply other threads:[~2008-02-14 13:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-14 13:10 Davies, Greg [this message]
2008-02-14 19:22 ` Enno Lübbers
2008-02-15 2:28 ` Andrew Lunn
2008-02-15 20:10 ` Davies, Greg
2008-02-15 11:43 Davies, Greg
2008-02-15 20:19 ` Gary Thomas
2008-02-15 20:46 ` Davies, Greg
2008-02-15 20:51 ` Gary Thomas
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