* synchronize RT thread to external IRQ - suggestions?
@ 2013-09-01 17:40 Michael Haberler
2013-09-08 0:53 ` Steven Rostedt
0 siblings, 1 reply; 2+ messages in thread
From: Michael Haberler @ 2013-09-01 17:40 UTC (permalink / raw)
To: linux-rt-users@vger.kernel.org; +Cc: Jon Elson
I've hardware at hand which would best be serviced by an RT-hardened thread after the hardware interrupts the host - in the simplest form it could be say a parport IRQ
squeezing out latency as far as possible is a must
I'm looking for suggestions how to best achieve that - just wait-for-irq in a normal device driver? any alternative schemes I should consider? (in the Xenomai setup an RTDM driver seems the way to go).
thanks in advance
Michael
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* Re: synchronize RT thread to external IRQ - suggestions?
2013-09-01 17:40 synchronize RT thread to external IRQ - suggestions? Michael Haberler
@ 2013-09-08 0:53 ` Steven Rostedt
0 siblings, 0 replies; 2+ messages in thread
From: Steven Rostedt @ 2013-09-08 0:53 UTC (permalink / raw)
To: Michael Haberler; +Cc: linux-rt-users@vger.kernel.org, Jon Elson
On Sun, 1 Sep 2013 19:40:14 +0200
Michael Haberler <ml1234@mah.priv.at> wrote:
> I've hardware at hand which would best be serviced by an RT-hardened thread after the hardware interrupts the host - in the simplest form it could be say a parport IRQ
request_threaded_irq() in the driver.
Then just set the priority of that thread to whatever you like it to be.
Or is this a user task thread?
-- Steve
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2013-09-01 17:40 synchronize RT thread to external IRQ - suggestions? Michael Haberler
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