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<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#1F2328;background:white">Hi everyone, I have read this blog: </span><span lang="EN-US" style="font-size:12.0pt"><a href="https://lttng.org/blog/2016/01/06/monitoring-realtime-latencies/"><span style="font-family:"Segoe UI",sans-serif;background:white">https://lttng.org/blog/2016/01/06/monitoring-realtime-latencies/</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#1F2328;background:white">,
and I think latency_tracker project will be very useful in resovling my problem under linux rt patch kernel 5.10, but it doesn't support linux newer kernel, so I find the span-latency-tracker project later. But when I use lttng create session</span><span style="font-size:12.0pt;color:#1F2328;background:white">$B!$(B</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#1F2328;background:white">
I get the error :</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#1F2328"><br>
<span style="background:white">Error: Event wakeup_latency: Kernel tracer not available (channel channel0, session auto-20231024-134242)</span><br>
<span style="background:white">Error: Event block_latency: Kernel tracer not available (channel channel0, session auto-20231024-134242)<o:p></o:p></span></span></p>
<p class="MsoNormal"><span lang="EN-US"><img border="0" width="1147" height="528" style="width:11.9479in;height:5.5in" id="图$BJR(B_x0020_1" src="cid:image001.png@01DA0751.175E6AA0" alt="$BJ8K\(B
$BIA=RVa<+(B动$B@8@.(B"></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#1F2328;background:white">And I find this tip: "To use the tracepoints provided by this module with LTTng, you first have to connect LTTng probes to them.
A patch ready to be applied to the last lttng-modules is provided in </span><span lang="EN-US" style="font-size:12.0pt"><a href="https://github.com/adel-belkhiri/span-latency-tracker/blob/master/extras"><span style="font-family:"Segoe UI",sans-serif;background:white">extras/</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#1F2328;background:white">.
When installed, compiled, load the new probe module with modprobe lttng-probe-latency_tracker", but I can't find the "lttng-probe-latency_tracker" module in the lttng-module compiled modules or in the span-latency-tracker compiled modules.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#1F2328;background:white">I also create the issue on the github:
<a href="https://github.com/adel-belkhiri/span-latency-tracker/issues/1">https://github.com/adel-belkhiri/span-latency-tracker/issues/1</a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:black;background:white">.</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Segoe UI",sans-serif;color:#1F2328"><br>
<span style="background:white">Any help will be appreciated! Thanks!</span></span><span lang="EN-US" style="font-size:12.0pt"><o:p></o:p></span></p>
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