<div dir="ltr">Hi Kushal,<div>I got the same issue some time back. I suggest installing Ubuntu 12.04 if you have not solved the problem already. As <span style="font-family:arial,sans-serif;font-size:13px">Bj?rn had said, Ubuntu 13.04 distro is not creating the trace devices properly..</span></div>
<div><span style="font-family:arial,sans-serif;font-size:13px">Hope this helps!</span></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr">Regards,<div>chandru</div></div></div>
<br><br><div class="gmail_quote">On Mon, Jul 7, 2014 at 6:00 PM, <span dir="ltr"><<a href="mailto:litmus-dev-request@lists.litmus-rt.org" target="_blank">litmus-dev-request@lists.litmus-rt.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send litmus-dev mailing list submissions to<br>
<a href="mailto:litmus-dev@lists.litmus-rt.org">litmus-dev@lists.litmus-rt.org</a><br>
<br>
To subscribe or unsubscribe via the World Wide Web, visit<br>
<a href="https://lists.litmus-rt.org/listinfo/litmus-dev" target="_blank">https://lists.litmus-rt.org/listinfo/litmus-dev</a><br>
or, via email, send a message with subject or body 'help' to<br>
<a href="mailto:litmus-dev-request@lists.litmus-rt.org">litmus-dev-request@lists.litmus-rt.org</a><br>
<br>
You can reach the person managing the list at<br>
<a href="mailto:litmus-dev-owner@lists.litmus-rt.org">litmus-dev-owner@lists.litmus-rt.org</a><br>
<br>
When replying, please edit your Subject line so it is more specific<br>
than "Re: Contents of litmus-dev digest..."<br>
<br>
<br>
Today's Topics:<br>
<br>
1. [Fwd: Re: log and feather trace missing from dev/litmus]<br>
(Kushal Srivastava)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Sun, 6 Jul 2014 23:36:31 +0530<br>
From: "Kushal Srivastava" <<a href="mailto:s.kushal@iitg.ernet.in">s.kushal@iitg.ernet.in</a>><br>
To: <a href="mailto:litmus-dev@lists.litmus-rt.org">litmus-dev@lists.litmus-rt.org</a><br>
Subject: [LITMUS^RT] [Fwd: Re: log and feather trace missing from<br>
dev/litmus]<br>
Message-ID:<br>
<<a href="mailto:8b9cb1d4afe6024779a672da5b5c18cd.squirrel@webmail.iitg.ernet.in">8b9cb1d4afe6024779a672da5b5c18cd.squirrel@webmail.iitg.ernet.in</a>><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
<br>
<br>
<br>
<br>
<br>
---------------------------- Original Message ----------------------------<br>
Subject: Re: [LITMUS^RT] log and feather trace missing from dev/litmus<br>
From: Bj?rn Brandenburg <<a href="mailto:bbb@mpi-sws.org">bbb@mpi-sws.org</a>><br>
Date: Wed, June 25, 2014 4:24 pm<br>
To: <a href="mailto:s.kushal@iitg.ernet.in">s.kushal@iitg.ernet.in</a><br>
<a href="mailto:litmus-dev@lists.litmus-rt.org">litmus-dev@lists.litmus-rt.org</a><br>
--------------------------------------------------------------------------<br>
<br>
<br>
On 24 Jun 2014, at 11:52, Kushal Srivastava <<a href="mailto:s.kushal@iitg.ernet.in">s.kushal@iitg.ernet.in</a>> wrote:<br>
<br>
> Hi Bjorn,<br>
>> as per your advice i'm sending you the output of li -l /dev/litmus/<br>
>> which is<br>
>> root@leonidas:/# ls -l /dev/litmus/<br>
>> total 0<br>
>> crw------- 1 root root 10, 61 Jun 24 07:04 ctrl<br>
>> crw-rw-rw- 1 root root 10, 60 Jun 24 07:04 uncache<br>
>><br>
>><br>
>> also the output of dmesg as recorded is enclosed as txt file here.<br>
>> Also i am current distribution is 13.04 .<br>
>> the output was as:<br>
>> Distributor ID: Ubuntu<br>
>> Description: Ubuntu 13.04<br>
>> Release: 13.04<br>
>> Codename: raring<br>
>><br>
>><br>
>><br>
>> <dmesg><br>
<br>
<br>
I would have expected error messages in the logs ("Could not register<br>
per-cpu ft_trace device" and "Could not register message ft_trace<br>
device").<br>
<br>
<a href="https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/trace.c#L500" target="_blank">https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/trace.c#L500</a><br>
<br>
<a href="https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/trace.c#L531" target="_blank">https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/trace.c#L531</a><br>
<br>
It appears that the devices are correctly being registered. This seems to<br>
indicate that udev might not create the device nodes due to whatever<br>
policy it is using in your distribution, which is really outside of our<br>
control.<br>
<br>
Just to check, can you please post the output of:<br>
<br>
cat /proc/devices<br>
<br>
- Bj?rn<br>
<br>
<br>
<br>
hi Bj?rn<br>
<br>
How can i trace the scheduling being done by the plugin without these tools<br>
I am attaching the output of /proc/devices<br>
as you had asked for it.<br>
What should be done to resolve the issue.<br>
how should the feather trace device node be created using the udev .<br>
would you suggest reinstalling the kernel and litmus-rt again along with<br>
the feather trace tools.<br>
<br>
-------------- next part --------------<br>
A non-text attachment was scrubbed...<br>
Name: devices<br>
Type: application/octet-stream<br>
Size: 536 bytes<br>
Desc: not available<br>
URL: <<a href="http://lists.litmus-rt.org/pipermail/litmus-dev/attachments/20140706/28bea4fa/attachment-0001.obj" target="_blank">http://lists.litmus-rt.org/pipermail/litmus-dev/attachments/20140706/28bea4fa/attachment-0001.obj</a>><br>
<br>
------------------------------<br>
<br>
_______________________________________________<br>
litmus-dev mailing list<br>
<a href="mailto:litmus-dev@lists.litmus-rt.org">litmus-dev@lists.litmus-rt.org</a><br>
<a href="https://lists.litmus-rt.org/listinfo/litmus-dev" target="_blank">https://lists.litmus-rt.org/listinfo/litmus-dev</a><br>
<br>
<br>
End of litmus-dev Digest, Vol 31, Issue 3<br>
*****************************************<br>
</blockquote></div><br></div></div>