<div dir="ltr">Hi Kienan, <div> like you asked i stopped all the lttng-sessionds. I did ps aux | grep lttng-sessiond to locate the processes and sudo kill to terminate them. When I ran sudo lttng-sessiond I got this error and this warning </div><div><br></div><div>Warning: No kernel tracer available</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le ven. 12 juill. 2024, à 16 h 01, Kienan Stewart <<a href="mailto:kstewart@efficios.com">kstewart@efficios.com</a>> a écrit :<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi François,<br>
<br>
On 7/12/24 3:52 PM, François Belias wrote:<br>
> Hi Kienan,<br>
> Yes, `lttng-sessiond` is being run by the root user. I have shared a <br>
> screenshot of the result when I ran the `lttng-sessiond -vvv` command, <br>
> but I don't think the kernel modules are loaded.<br>
> thanks<br>
> <br>
> <br>
<br>
There are two issues in the screenshot you attached:<br>
<br>
1. You are not starting lttng-sessiond as the root user, you are <br>
running it as the user 'philippe'<br>
2. The error in the screenshot indicates that there is already <br>
another lttng-sessiond running.<br>
<br>
Could you please stop all of the lttng-sessionds, then run <br>
`lttng-sessiond -vvv` as the root user?<br>
<br>
thanks,<br>
kienan<br>
<br>
> Le ven. 12 juill. 2024, à 15 h 24, Kienan Stewart <<a href="mailto:kstewart@efficios.com" target="_blank">kstewart@efficios.com</a> <br>
> <mailto:<a href="mailto:kstewart@efficios.com" target="_blank">kstewart@efficios.com</a>>> a écrit :<br>
> <br>
> Hi François,<br>
> <br>
> On 7/12/24 2:53 PM, François Belias via lttng-dev wrote:<br>
> > Hello,<br>
> ><br>
> > When I run the command `sudo lttng list -k`, I get the following<br>
> error:<br>
> <br>
> To check a few things:<br>
> <br>
> * Is lttng-sessiond being run by the root user?<br>
> * If you run lttng-session with the "-vvv" option, are there<br>
> messages<br>
> related to loading the kernel modules?<br>
> * Once the lttng-sessiond is started, you can check to see if the<br>
> kernel modules have been loaded by running the following command:<br>
> <br>
> ```<br>
> lsmod | grep lttng<br>
> ```<br>
> <br>
> thanks,<br>
> kienan<br>
> <br>
> ><br>
> > ```<br>
> > Error: Unable to list kernel events: Kernel tracer not available.<br>
> > ```<br>
> ><br>
> > I am trying to build LTTng-modules from the source. I followed<br>
> the steps<br>
> > from this website: [LTTng<br>
> ><br>
> Documentation](<a href="https://lttng.org/docs/v2.13/#doc-building-from-source" rel="noreferrer" target="_blank">https://lttng.org/docs/v2.13/#doc-building-from-source</a> <<a href="https://lttng.org/docs/v2.13/#doc-building-from-source" rel="noreferrer" target="_blank">https://lttng.org/docs/v2.13/#doc-building-from-source</a>><br>
> > <<a href="https://lttng.org/docs/v2.13/#doc-building-from-source" rel="noreferrer" target="_blank">https://lttng.org/docs/v2.13/#doc-building-from-source</a><br>
> <<a href="https://lttng.org/docs/v2.13/#doc-building-from-source" rel="noreferrer" target="_blank">https://lttng.org/docs/v2.13/#doc-building-from-source</a>>>), but I still<br>
> > encounter this error. Can someone help me resolve this issue?<br>
> ><br>
> > Thanks.<br>
> ><br>
> > _______________________________________________<br>
> > lttng-dev mailing list<br>
> > <a href="mailto:lttng-dev@lists.lttng.org" target="_blank">lttng-dev@lists.lttng.org</a> <mailto:<a href="mailto:lttng-dev@lists.lttng.org" target="_blank">lttng-dev@lists.lttng.org</a>><br>
> > <a href="https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev" rel="noreferrer" target="_blank">https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev</a><br>
> <<a href="https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev" rel="noreferrer" target="_blank">https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev</a>><br>
> <br>
</blockquote></div>