[Xenomai] Failure with rtdm_dev_register in rtdmtest

[Xenomai] Failure with rtdm_dev_register in rtdmtest

[Ran Shalit]

Hello,

I am trying to do initial testing of xenomai in my system.
It seems that the boot of kernel with xenomai is without any issues

zynq> dmesg | grep Xenomai
I-pipe: head domain Xenomai registered.
Xenomai: hal/arm started.
Xenomai: scheduling class idle registered.
Xenomai: scheduling class rt registered.
Xenomai: real-time nucleus v2.6.3 (Lies and Truths) loaded.
Xenomai: debug mode enabled.
Xenomai: starting native API services.
Xenomai: starting POSIX services.
Xenomai: starting RTDM services.
zynq> uname -a
Linux 192.168.1.8 3.8.0-xilinx #17 SMP PREEMPT Tue May 24 19:05:08 IDT
2016 armv7l GNU/Linux

But on trying to load rtdmtest, I get no /dev/rtdm :

zynq> insmod xeno_rtdmtest.ko
zynq> lsmod
xeno_rtdmtest 2239 0 - Live 0xbf000000
zynq>

zynq> ls /dev/rt
rtheap  rtp11   rtp15   rtp19   rtp22   rtp26   rtp3    rtp5    rtp9
rtp0    rtp12   rtp16   rtp2    rtp23   rtp27   rtp30   rtp6
rtp1    rtp13   rtp17   rtp20   rtp24   rtp28   rtp31   rtp7
rtp10   rtp14   rtp18   rtp21   rtp25   rtp29   rtp4    rtp8


I tried to debug and it seems that err =
rtdm_dev_register(&device[dev]) has failed.

Is there any idea what might be wrong ?

Regards,
Ran

Re: [Xenomai] Failure with rtdm_dev_register in rtdmtest

[Gilles Chanteperdrix]

On Tue, May 24, 2016 at 08:46:54PM +0300, Ran Shalit wrote:
> Hello,
> 
> I am trying to do initial testing of xenomai in my system.
> It seems that the boot of kernel with xenomai is without any issues
> 
> zynq> dmesg | grep Xenomai
> I-pipe: head domain Xenomai registered.
> Xenomai: hal/arm started.
> Xenomai: scheduling class idle registered.
> Xenomai: scheduling class rt registered.
> Xenomai: real-time nucleus v2.6.3 (Lies and Truths) loaded.

So you have the same problem with Xenomai 2.6.4?

> Xenomai: debug mode enabled.
> Xenomai: starting native API services.
> Xenomai: starting POSIX services.
> Xenomai: starting RTDM services.
> zynq> uname -a
> Linux 192.168.1.8 3.8.0-xilinx #17 SMP PREEMPT Tue May 24 19:05:08 IDT
> 2016 armv7l GNU/Linux
> 
> But on trying to load rtdmtest, I get no /dev/rtdm :

You have misread the documentation. /dev/rtdm only exists with
Xenomai 3, not Xenomai 2.

-- 
					    Gilles.
https://click-hack.org

Re: [Xenomai] Failure with rtdm_dev_register in rtdmtest

[Ran Shalit]

On Tue, May 24, 2016 at 9:03 PM, Gilles Chanteperdrix
<gilles.chanteperdrix@xenomai.org> wrote:
> On Tue, May 24, 2016 at 08:46:54PM +0300, Ran Shalit wrote:
>> Hello,
>>
>> I am trying to do initial testing of xenomai in my system.
>> It seems that the boot of kernel with xenomai is without any issues
>>
>> zynq> dmesg | grep Xenomai
>> I-pipe: head domain Xenomai registered.
>> Xenomai: hal/arm started.
>> Xenomai: scheduling class idle registered.
>> Xenomai: scheduling class rt registered.
>> Xenomai: real-time nucleus v2.6.3 (Lies and Truths) loaded.
>
> So you have the same problem with Xenomai 2.6.4?
>
>> Xenomai: debug mode enabled.
>> Xenomai: starting native API services.
>> Xenomai: starting POSIX services.
>> Xenomai: starting RTDM services.
>> zynq> uname -a
>> Linux 192.168.1.8 3.8.0-xilinx #17 SMP PREEMPT Tue May 24 19:05:08 IDT
>> 2016 armv7l GNU/Linux
>>
>> But on trying to load rtdmtest, I get no /dev/rtdm :
>
> You have misread the documentation. /dev/rtdm only exists with
> Xenomai 3, not Xenomai 2.
>

Hi,

I see in code that it should have created device in
/dev/rttest-rtdm%d , but I can't find such device:

zynq> ls /dev/rt
rtheap  rtp11   rtp15   rtp19   rtp22   rtp26   rtp3    rtp5    rtp9
rtp0    rtp12   rtp16   rtp2    rtp23   rtp27   rtp30   rtp6
rtp1    rtp13   rtp17   rtp20   rtp24   rtp28   rtp31   rtp7
rtp10   rtp14   rtp18   rtp21   rtp25   rtp29   rtp4    rtp8

I have followed the documentation in
doc/generated/pdf/README.INSTALL.pdf, but didn't find references to
rtdmtest device.

Best Regards,
Ran

Re: [Xenomai] Failure with rtdm_dev_register in rtdmtest

[Gilles Chanteperdrix]

On Tue, May 24, 2016 at 09:53:46PM +0300, Ran Shalit wrote:
> On Tue, May 24, 2016 at 9:03 PM, Gilles Chanteperdrix
> <gilles.chanteperdrix@xenomai.org> wrote:
> > On Tue, May 24, 2016 at 08:46:54PM +0300, Ran Shalit wrote:
> >> Hello,
> >>
> >> I am trying to do initial testing of xenomai in my system.
> >> It seems that the boot of kernel with xenomai is without any issues
> >>
> >> zynq> dmesg | grep Xenomai
> >> I-pipe: head domain Xenomai registered.
> >> Xenomai: hal/arm started.
> >> Xenomai: scheduling class idle registered.
> >> Xenomai: scheduling class rt registered.
> >> Xenomai: real-time nucleus v2.6.3 (Lies and Truths) loaded.
> >
> > So you have the same problem with Xenomai 2.6.4?
> >
> >> Xenomai: debug mode enabled.
> >> Xenomai: starting native API services.
> >> Xenomai: starting POSIX services.
> >> Xenomai: starting RTDM services.
> >> zynq> uname -a
> >> Linux 192.168.1.8 3.8.0-xilinx #17 SMP PREEMPT Tue May 24 19:05:08 IDT
> >> 2016 armv7l GNU/Linux
> >>
> >> But on trying to load rtdmtest, I get no /dev/rtdm :
> >
> > You have misread the documentation. /dev/rtdm only exists with
> > Xenomai 3, not Xenomai 2.
> >
> 
> Hi,
> 
> I see in code that it should have created device in
> /dev/rttest-rtdm%d , but I can't find such device:

The device rttest-rtdm%d may exist, but not in the filesystem in
Xenomai 2.

Anyway, if you say that rtdm_dev_register fails, this is a real
issue. So, I suggest again to try Xenomai 2.6.4, in order to be sure
that you do not have a bug that has already been fixed.

-- 
					    Gilles.
https://click-hack.org

Re: [Xenomai] Failure with rtdm_dev_register in rtdmtest

[Gilles Chanteperdrix]

On Tue, May 24, 2016 at 10:15:24PM +0300, Ran Shalit wrote:
> On Tue, May 24, 2016 at 10:01 PM, Gilles Chanteperdrix
> <gilles.chanteperdrix@xenomai.org> wrote:
> > On Tue, May 24, 2016 at 09:53:46PM +0300, Ran Shalit wrote:
> >> On Tue, May 24, 2016 at 9:03 PM, Gilles Chanteperdrix
> >> <gilles.chanteperdrix@xenomai.org> wrote:
> >> > On Tue, May 24, 2016 at 08:46:54PM +0300, Ran Shalit wrote:
> >> >> Hello,
> >> >>
> >> >> I am trying to do initial testing of xenomai in my system.
> >> >> It seems that the boot of kernel with xenomai is without any issues
> >> >>
> >> >> zynq> dmesg | grep Xenomai
> >> >> I-pipe: head domain Xenomai registered.
> >> >> Xenomai: hal/arm started.
> >> >> Xenomai: scheduling class idle registered.
> >> >> Xenomai: scheduling class rt registered.
> >> >> Xenomai: real-time nucleus v2.6.3 (Lies and Truths) loaded.
> >> >
> >> > So you have the same problem with Xenomai 2.6.4?
> >> >
> >> >> Xenomai: debug mode enabled.
> >> >> Xenomai: starting native API services.
> >> >> Xenomai: starting POSIX services.
> >> >> Xenomai: starting RTDM services.
> >> >> zynq> uname -a
> >> >> Linux 192.168.1.8 3.8.0-xilinx #17 SMP PREEMPT Tue May 24 19:05:08 IDT
> >> >> 2016 armv7l GNU/Linux
> >> >>
> >> >> But on trying to load rtdmtest, I get no /dev/rtdm :
> >> >
> >> > You have misread the documentation. /dev/rtdm only exists with
> >> > Xenomai 3, not Xenomai 2.
> >> >
> >>
> >> Hi,
> >>
> >> I see in code that it should have created device in
> >> /dev/rttest-rtdm%d , but I can't find such device:
> >
> > The device rttest-rtdm%d may exist, but not in the filesystem in
> > Xenomai 2.
> >
> > Anyway, if you say that rtdm_dev_register fails, this is a real
> > issue. So, I suggest again to try Xenomai 2.6.4, in order to be sure
> > that you do not have a bug that has already been fixed.
> >
> Sorry, my mistake !
> It does not fail, it returns 0.

Ok, but I really strongly suggest that you switch to Xenomai 2.6.4.

> 
> But still I don't understand , if it succeeded , why there is no
> /dev/rttest-rtdm0.

Because in Xenomai 2: no device gets created in the filesystem for
RTDM devices.

> Also, If the device exist but not in filesystem, how can we
> communicate with the defice ( ioctl probably won't work).

You use Xenomai version of ioctl which will be able to communicate
with the device. Either using ioctl with the POSIX skin, or
rt_dev_ioctl() with the RTDM skin.

-- 
					    Gilles.
https://click-hack.org