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Old 04-08-2012, 07:37 PM
"Sean M. Pappalardo"
 
Default linux-image-3.2.0-0.bpo.2-rt-amd64 timer resolution?

Hello.

I just want to find out if the package
linux-image-3.2.0-0.bpo.2-rt-amd64 (and the 3.2.x-rt one in Wheezy) are
built with 1000Hz timer resolution in addition to the RT patch?


Sincerely,
Sean M. Pappalardo
 
Old 04-08-2012, 09:36 PM
Ben Hutchings
 
Default linux-image-3.2.0-0.bpo.2-rt-amd64 timer resolution?

On Sun, 2012-04-08 at 21:37 +0200, Sean M. Pappalardo wrote:
> Hello.
>
> I just want to find out if the package
> linux-image-3.2.0-0.bpo.2-rt-amd64 (and the 3.2.x-rt one in Wheezy) are
> built with 1000Hz timer resolution in addition to the RT patch?

I assume you're talking about the scheduler clock frequency (HZ), which
remains 250 per default. Bear in mind that the scheduler clock is only
used for time-slicing between tasks with equal priority. This is quite
separate from PREEMPT_RT, which makes it possible to preempt *lower*
priority tasks (including interrupt handlers) with low latency.

Ben.

--
Ben Hutchings
If more than one person is responsible for a bug, no one is at fault.
 

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