From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Lifeng Wang <lfwangcn@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] When startup the preemptive priority-base scheduling, at the start pont, I observed the output with wrong order.
Date: Tue, 13 Dec 2011 10:03:46 +0100 [thread overview]
Message-ID: <4EE714F2.4010600@domain.hid> (raw)
In-Reply-To: <CAO0Fu5Bh-PUZuyzL+hZWJJQ9wCJs8pmnZ6=+rkuVs0Xuc=1TxQ@mail.gmail.com>
On 12/13/2011 03:48 AM, Lifeng Wang wrote:
> Why is it not?
> Can someone tell me why and tell me how to write the correct code for the
> preemptive priority-base scheduling.
rt_printf does not preserve the order of prints between tasks. Besides
with rt_print_auto_init, the first rt_printf may cause a call to malloc,
which may cause a switch to secondary mode.
So you should not rely on what the test prints.
--
Gilles.
next prev parent reply other threads:[~2011-12-13 9:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-13 2:48 [Xenomai-help] When startup the preemptive priority-base scheduling, at the start pont, I observed the output with wrong order Lifeng Wang
2011-12-13 9:03 ` Gilles Chanteperdrix [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-12-13 4:08 Lifeng Wang
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