From: wael showair <showair2003@yahoo.com>
To: linuxppc-dev@ozlabs.org
Subject: Re: how can i send real-time signal?
Date: Sat, 6 Jun 2009 17:33:39 -0700 (PDT) [thread overview]
Message-ID: <23906892.post@talk.nabble.com> (raw)
In-Reply-To: <23892580.post@talk.nabble.com>
Am Fri, 5 Jun 2009 10:41:56 -0700 (PDT)
schrieb wael showair <showair2003@yahoo.com>:
> My aim is : Each time the DSP-core interrupts the MPC8555 processor, a
> process in the user space will be informed by the arrival of this each
> interrupt.
You should have a look at drivers/uio...
> So i decided to use sw signals, in the ISR of the DSP-core interrupt
> i send a SW signal to the user space process? Is this the best
> solution? are there any better suggestion to achieve my aim?
signals are expensive. Look at the UIO-Framework for a cheaper solution.
preallocated RT-Signals on the other Hand are fragile. Blocking reads
are cheaper and in case of preempt-RT, but not resticted to it, much
easier to handle.
Bene
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prev parent reply other threads:[~2009-06-07 0:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-05 17:41 how can i send real-time signal? wael showair
2009-06-06 20:51 ` Benedikt Spranger
2009-06-07 0:33 ` wael showair [this message]
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