<div dir="ltr">Hi Milian,<div>Are you running on an x86 processor?</div><div>The pagefault tracepoints are called : x86_exceptions_page_fault_<wbr>user, x86_exceptions_page_fault_<wbr>kernel</div><div>Can you see those tracepoints when you run: lttng list --kernel </div><div><br></div><div>Thank you,</div><div>Francis</div><div class="gmail_extra"><br><div class="gmail_quote">2017-05-24 12:00 GMT-04:00 Milian Wolff <span dir="ltr"><<a href="mailto:milian.wolff@kdab.com" target="_blank">milian.wolff@kdab.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey all,<br>
<br>
when I trace with perf, I can see page_faults occurring. But when I do<br>
something like the following with lttng:<br>
<br>
lttng create<br>
lttng enable-channel kernel -k<br>
lttng enable-event -c kernel -k -a<br>
lttng start<br>
# trigger page faults<br>
lttng stop<br>
<br>
then I do not see any page faults in tracecompass/babeltrace. What do I need<br>
to do to see those too? I'm aware that lttng comes with its own set of<br>
tracepoints - i.e. it's not using the same tracepoints that perf knows about.<br>
But googling shows me e.g. this:<br>
<br>
<a href="https://lists.lttng.org/pipermail/lttng-dev/2013-April/019954.html" rel="noreferrer" target="_blank">https://lists.lttng.org/piperm<wbr>ail/lttng-dev/2013-April/<wbr>019954.html</a><br>
<a href="https://lists.lttng.org/pipermail/lttng-dev/2016-May/026033.html" rel="noreferrer" target="_blank">https://lists.lttng.org/piperm<wbr>ail/lttng-dev/2016-May/026033.<wbr>html</a><br>
<br>
Which sounds like the feature should be available in lttng too?<br>
<br>
I'm using the ArchLinux packages in AUR, i.e. version 2.9.2 of LTTng and<br>
kernel 4.10.13-1.<br>
<br>
Thanks<br>
<span class="m_3331527344415455564HOEnZb"><font color="#888888">--<br>
Milian Wolff | <a href="mailto:milian.wolff@kdab.com" target="_blank">milian.wolff@kdab.com</a> | Software Engineer<br>
KDAB (Deutschland) GmbH&Co KG, a KDAB Group company<br>
Tel: +49-30-521325470<br>
KDAB - The Qt Experts</font></span><br>______________________________<wbr>_________________<br>
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<br></blockquote></div><br></div><br clear="all"><div><br></div>-- <br><div class="m_3331527344415455564gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div>Francis Deslauriers</div><div dir="ltr">Software developer<div>EfficiOS inc.</div></div></div></div></div></div>