[LITMUS^RT] litmus-dev Digest, Vol 31, Issue 3

[Glenn Elliott]

FWIW, I haven’t had any problems with Ubuntu 13.10 on x86_64…

-Glenn


On Jul 11, 2014, at 2:19 PM, Chandrasekaran Sivakumar <chandru.a6 at gmail.com> wrote:

> Hi Kushal,
> I got the same issue some time back. I suggest installing Ubuntu 12.04 if you have not solved the problem already. As Bj?rn had said, Ubuntu 13.04 distro is not creating the trace devices properly..
> Hope this helps!
> 
> Regards,
> chandru
> 
> 
> On Mon, Jul 7, 2014 at 6:00 PM, <litmus-dev-request at lists.litmus-rt.org> wrote:
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> Today's Topics:
> 
>    1. [Fwd: Re: log and feather trace missing from dev/litmus]
>       (Kushal Srivastava)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sun, 6 Jul 2014 23:36:31 +0530
> From: "Kushal Srivastava" <s.kushal at iitg.ernet.in>
> To: litmus-dev at lists.litmus-rt.org
> Subject: [LITMUS^RT] [Fwd: Re: log and feather trace missing from
>         dev/litmus]
> Message-ID:
>         <8b9cb1d4afe6024779a672da5b5c18cd.squirrel at webmail.iitg.ernet.in>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> 
> 
> 
> 
> 
> ---------------------------- Original Message ----------------------------
> Subject: Re: [LITMUS^RT]  log and feather trace missing from dev/litmus
> From:    Bj?rn Brandenburg <bbb at mpi-sws.org>
> Date:    Wed, June 25, 2014 4:24 pm
> To:      s.kushal at iitg.ernet.in
>          litmus-dev at lists.litmus-rt.org
> --------------------------------------------------------------------------
> 
> 
> On 24 Jun 2014, at 11:52, Kushal Srivastava <s.kushal at iitg.ernet.in> wrote:
> 
> > Hi Bjorn,
> >> as per your advice i'm sending you the output of li -l /dev/litmus/
> >> which is
> >> root at leonidas:/# ls -l /dev/litmus/
> >> total 0
> >> crw------- 1 root root 10, 61 Jun 24 07:04 ctrl
> >> crw-rw-rw- 1 root root 10, 60 Jun 24 07:04 uncache
> >>
> >>
> >> also the output of dmesg as recorded is enclosed as txt file here.
> >> Also i am current distribution is 13.04 .
> >> the output was as:
> >> Distributor ID:        Ubuntu
> >> Description:        Ubuntu 13.04
> >> Release:        13.04
> >> Codename:        raring
> >>
> >>
> >>
> >> <dmesg>
> 
> 
> I would have expected error messages in the logs ("Could not register
> per-cpu ft_trace device" and "Could not register message ft_trace
> device").
> 
>         https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/trace.c#L500
> 
>         https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/trace.c#L531
> 
> It appears that the devices are correctly being registered. This seems to
> indicate that udev might not create the device nodes due to whatever
> policy it is using in your distribution, which is really outside of our
> control.
> 
> Just to check, can you please post the output of:
> 
>         cat /proc/devices
> 
> - Bj?rn
> 
> 
> 
> hi  Bj?rn
> 
> How can i trace the scheduling being done by the plugin without these tools
> I am attaching the output of /proc/devices
> as you had asked for it.
> What should be done to resolve the issue.
> how should the feather trace device node be created using the udev .
> would you suggest reinstalling the kernel and litmus-rt again along with
> the feather trace tools.
> 
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