Help about Ubuntu Linux-rt

Help about Ubuntu Linux-rt

[rafet ilgin]

I have installed real time image on my ubuntu karmic(9.10) by using
the command apt-get install linux-rt(2.6.31.9-rt). After installing
the image I have booted my system from real time kernel(2.6.31.9-rt).
Can I say that is it now real time? And is it soft real time or hard
real time? I looked at the file /boot/config-2.6.31.9-rt and saw that
CONFIG_PREEMPT_RT=y is set. If you reply me I would really appreciate
it.

Re: Help about Ubuntu Linux-rt

[Bernardo Barros]

try
    uname -r

and see what kernel your system is using.


2010/9/22 rafet ilgin <rafetilginmetu@gmail.com>:
> I have installed real time image on my ubuntu karmic(9.10) by using
> the command apt-get install linux-rt(2.6.31.9-rt). After installing
> the image I have booted my system from real time kernel(2.6.31.9-rt).
> Can I say that is it now real time? And is it soft real time or hard
> real time? I looked at the file /boot/config-2.6.31.9-rt and saw that
> CONFIG_PREEMPT_RT=y is set. If you reply me I would really appreciate
> it.
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Re: Help about Ubuntu Linux-rt

[gowrishankar]

On Thursday 23 September 2010 02:27 AM, rafet ilgin wrote:
> I have installed real time image on my ubuntu karmic(9.10) by using
> the command apt-get install linux-rt(2.6.31.9-rt). After installing
> the image I have booted my system from real time kernel(2.6.31.9-rt).
> Can I say that is it now real time? And is it soft real time or hard
> real time? I looked at the file /boot/config-2.6.31.9-rt and saw that
> CONFIG_PREEMPT_RT=y is set. If you reply me I would really appreciate
> it.
>    

CONFIG_PREEMPT_RT is written to meet the hard realtime challenges,
but it also depends on the hardware you use. Make sure the system is not
against you :) . Also, your software should also be written to make use of
realtime api's, otherwise you may not see the difference.

Thanks,
Gowrishankar

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>    

Re: Help about Ubuntu Linux-rt

[Manikandan Ramachandran]

Check if IRQs are threaded. Do ps -e, and if you see lots of process
with IRQ-xx, then your kernel is RT.

There is nothing like Hard/Soft RT linux.

HTH,
Mani

On Wed, Sep 22, 2010 at 1:57 PM, rafet ilgin <rafetilginmetu@gmail.com> wrote:
> I have installed real time image on my ubuntu karmic(9.10) by using
> the command apt-get install linux-rt(2.6.31.9-rt). After installing
> the image I have booted my system from real time kernel(2.6.31.9-rt).
> Can I say that is it now real time? And is it soft real time or hard
> real time? I looked at the file /boot/config-2.6.31.9-rt and saw that
> CONFIG_PREEMPT_RT=y is set. If you reply me I would really appreciate
> it.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>



-- 
Thanks,
Manik

Think twice about a tree before you take a printout
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