<div dir="ltr">Hi Christopher,<div><br></div><div>Thank you very much for your reply.</div><div>Can you please explain what do you mean by ftrace-enabled kernel ?</div><div><br></div><div>Best regards,</div><div>Zvika </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 27, 2024 at 7:32 PM Christopher Harvey via lttng-dev <<a href="mailto:lttng-dev@lists.lttng.org">lttng-dev@lists.lttng.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">you can use an ftrace-enabled kernel with lttng (maybe even just tracecompass) or perfetto to get that kind of trace<br>
<br>
<a href="https://archive.eclipse.org/tracecompass.incubator/doc/org.eclipse.tracecompass.incubator.ftrace.doc.user/User-Guide.html" rel="noreferrer" target="_blank">https://archive.eclipse.org/tracecompass.incubator/doc/org.eclipse.tracecompass.incubator.ftrace.doc.user/User-Guide.html</a><br>
<br>
or<br>
<br>
<a href="https://ui.perfetto.dev/" rel="noreferrer" target="_blank">https://ui.perfetto.dev/</a><br>
<br>
On Wed, Mar 27, 2024, at 5:26 AM, Zvi Vered via lttng-dev wrote:<br>
> Hello,<br>
><br>
> I have an application with 4 threads. <br>
> I'm required to display on the graph when thread starts working till it <br>
> blocks for the next semaphore. <br>
><br>
> But without using the lttng userspace library.<br>
><br>
> Is it possible ?<br>
><br>
> Thank you,<br>
> Zvika<br>
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</blockquote></div>