<div dir="ltr">Thanks Jonathan for you helpful response. I was able to install the specific linux-headers and it seems to install all of the modules. Now i've hit another roadblock. whenever i try to list all of the kernel events using lttng list -k, it throws an error: unable to list kernel events: Kernel tracer is not available. I have two lttng-sessiond running. </div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Nov 17, 2016 at 4:45 PM, Jonathan Rajotte Julien <span dir="ltr"><<a href="mailto:Jonathan.rajotte-julien@efficios.com" target="_blank">Jonathan.rajotte-julien@efficios.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<span class=""><br>
<br>
<br>
On 2016-11-17 04:24 PM, Nwafor, Ebelechukwu wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Jonathan. Thank you for your response.<br>
<br>
On the beaglebone black, i tried building lttng-tools, lttng-modules-dkms and lttng-ust-dev from source v2.8.1 by following the documentation. lttng-modules-dkms runs fine but the module does not show up on the list of running modules when i issue an lsmod command. Also, i run into errors while trying to build and compile lttng-tools. Beaglebone black runs on debian. Linux beaglebone 3.8.13-bone70 #1 SMP Fri Jan 23 02:15:42 UTC 2015 armv7l GNU/Linux<br>
</blockquote>
<br></span>
What errors do you see when building lttng-tools?<span class=""><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
<br>
On the raspberry pi, I use the commands, apt-get install lttng-modules-dkms lttng-tools lttng-ust-dev. Everything seems to work fine with the exception of lttng-modules-dkms which does not show up on the list on running modules. Also, every time i try to view available kernel events, it comes up with an error saying unable to list kernel events: kernel tracer not available. The LTTNG version installed using apt-get is 2.7.1. I am running ubuntu mate OS. Below are the output while installing lttng-modules-dkms<br>
</blockquote>
<br></span>
Well as the error points out do you have the kernel tracer started?<br>
<br>
ps -aux | grep lttng-sessiond<br>
<br>
Does the user trying to use lttng is part of the tracing group or is root ?<br>
<br>
You can start lttng-sessiond with the -vvv options make sure to be root when doing so lttng-sessiond load the tracing modules.<br>
<br>
Since you installed it from apt-get the lttng-tools package provide a daemon for lttng-sessiond so before testing manually:<br>
<br>
service lttng-sessiond stop<span class=""><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
<br>
root@ebele-desktop:~# apt-get install lttng-modules-dkms<br>
Reading package lists... Done<br>
Building dependency tree<br>
Reading state information... Done<br>
lttng-modules-dkms is already the newest version (2.7.1-1).<br>
0 upgraded, 0 newly installed, 0 to remove and 14 not upgraded.<br>
2 not fully installed or removed.<br>
After this operation, 0 B of additional disk space will be used.<br>
Do you want to continue? [Y/n] Y<br>
Setting up linux-headers-4.4.0-22 (4.4.0-22.40) ...<br>
Setting up lttng-modules-dkms (2.7.1-1) ...<br>
Loading new lttng-modules-2.7.1 DKMS files...<br>
First Installation: checking all kernels...<br>
dpkg: warning: version '*-*' has bad syntax: version number does not start with digit<br>
It is likely that 4.4.30-v7+ belongs to a chroot's host<br>
Module build for the currently running kernel was skipped since the<br>
kernel source for this kernel does not seem to be installed.<br>
</blockquote>
<br>
<br></span>
Could you make sure that your linux header for the running kernel are installed.<br>
<br>
4.4.30-v7+ seems like a custom kernel install.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
root@ebele-desktop:~#<span class=""><br>
<br>
<br>
<br>
On Thu, Nov 17, 2016 at 3:00 PM, Jonathan Rajotte <<a href="mailto:jonathan.r.julien@gmail.com" target="_blank">jonathan.r.julien@gmail.com</a> <mailto:<a href="mailto:jonathan.r.julien@gmail.com" target="_blank">jonathan.r.julien@gmai<wbr>l.com</a>>> wrote:<br>
<br>
Hi,<br>
<br>
Could you be a bit more precise regarding which part of the<br>
documentation does not work ?<br>
<br>
How did you install it ? Distribution packages ? From sources ?<br>
Cross compiled ?<br>
<br>
What is your setup ? Raspian for the Pi ? Custom kernel image ?<br>
<br>
Cheers<br>
<br>
On Thu, Nov 17, 2016 at 2:54 PM, Nwafor, Ebelechukwu<br>
<<a href="mailto:ebelechukwu.nwafor@bison.howard.edu" target="_blank">ebelechukwu.nwafor@bison.howa<wbr>rd.edu</a><br></span><span class="">
<mailto:<a href="mailto:ebelechukwu.nwafor@bison.howard.edu" target="_blank">ebelechukwu.nwafor@bis<wbr>on.howard.edu</a>>> wrote:<br>
<br>
Hello.<br>
<br>
I am trying to install LTTNG tracing tool on raspberry pi and<br>
beaglebone black board.The official LTTNG documentation does<br>
not work on these devices. Does anyone know of any tutorial<br>
that can help me accomplish this? Thanks.<br>
<br>
-- Ebelechukwu Nwafor,<br>
Graduate Student,<br>
Howard University.<br>
<br>
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<br>
<br>
<br>
-- Jonathan Rajotte Julien<br>
<br>
<br>
<br>
<br>
-- <br>
Ebelechukwu Nwafor,<br>
Graduate Student,<br>
Howard University.<br>
<br>
<br>
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</span></blockquote><span class="HOEnZb"><font color="#888888">
<br>
-- <br>
Jonathan R. Julien<br>
Efficios</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Ebelechukwu Nwafor,<div>Graduate Student,</div><div>Howard University.</div></div></div>
</div>