From: Steven Seeger <steve@domain.hid>
To: "xenomai@xenomai.org" <xenomai@xenomai.org>
Subject: [Xenomai-help] no-brainer realtime issue
Date: Thu, 16 Feb 2006 08:21:31 -0800 [thread overview]
Message-ID: <C019E68B.23F6%steve@domain.hid> (raw)
I have a xenomai userspace application that does the following:
A thread of priority 90 toggles a bit (outb) to move a stepper motor.
A thread of priority 10 updates the display once a second.
The motor thread is periodic and uses rt_task_wait_period(). The display
thread just uses sleep(1).
My question is this: the priority 90 thread is higher priority, and doesn't
do anything relating to linux system calls. Whenever the display thread
updates the display, the motor thread stalls momentarily.
Any idea why this is?
Steven
next reply other threads:[~2006-02-16 16:21 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-16 16:21 Steven Seeger [this message]
2006-02-16 16:34 ` [Xenomai-help] no-brainer realtime issue Philippe Gerum
2006-02-16 16:41 ` Jan Kiszka
2006-02-16 17:21 ` Philippe Gerum
[not found] <43F4D077.10003@domain.hid>
2006-02-16 19:48 ` Steven Seeger
2006-02-17 8:17 ` Philippe Gerum
2006-02-17 14:04 ` Steven Seeger
2006-02-17 14:28 ` Philippe Gerum
2006-02-17 14:37 ` Steven Seeger
2006-02-17 15:00 ` Steven Seeger
2006-02-17 15:59 ` Philippe Gerum
2006-02-17 16:05 ` Steven Seeger
2006-02-17 16:27 ` Philippe Gerum
2006-02-17 17:53 ` Steven Seeger
2006-02-17 18:29 ` Philippe Gerum
2006-02-17 18:37 ` Philippe Gerum
2006-02-21 13:50 ` Steven Seeger
2006-02-21 15:04 ` Steven Seeger
2006-02-18 13:05 ` Gilles Chanteperdrix
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