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Hi Jonathan,</div>
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Apologies that I forgot to mention which version of LTTng I'm using. I didn't build from master but downloaded the latest release archives for LTTng 2.12 "(Ta) Meilleure". "lttng --version" reports a corresponding "lttng (LTTng Trace Control) 2.12.1 - (Ta)
Meilleure"<br>
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Please find the console log here: <a href="https://pastebin.com/PVzqrPvr" id="LPNoLPOWALinkPreview_0">
https://pastebin.com/PVzqrPvr</a><br>
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and the lttng-sessiond.log here: <a href="https://pastebin.com/g3aXAcQg" id="LPNoLPOWALinkPreview_1">
https://pastebin.com/g3aXAcQg</a><br>
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Thanks,</div>
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Moritz<br>
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<p class="x_MsoNormal" style="margin-top: 0px; margin-bottom: 0px;"><b><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray">Moritz Pflanzer</span></b><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray"><br>
Software Development Engineer<br>
</span><u><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:rgb(0,130,191)"><br>
</span></u><span style=""><img class="EmojiInsert" id="OWAPstImg328303" alt="cid:image001.png@01D3BF6E.185110B0" style="width:2.0833in; height:0.6458in" width="200" height="62" data-outlook-trace="F:1|T:1" src="cid:b9f0d510-265b-4b18-826c-f8669edaf371"></span><u><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:rgb(0,130,191)"></span></u></p>
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Räffelstrasse 28</span></p>
<p style="margin-top: 0px; margin-bottom: 0px;margin-top:0; margin-bottom:0"><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray">8045 Zürich<b><br>
</b><b>E: </b><a href="mailto:moritz.pflanzer@hexagon.com" class="OWAAutoLink"><span style="color:rgb(0,111,201)">moritz.pflanzer@hexagon.com</span></a><b></b></span><span style=""><a href="mailto:carolin.siebert@hexagon.com" target="_blank" rel="noopener noreferrer"><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:rgb(5,99,193)"></span></a></span><b><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:gray"><br>
W: </span></b><span style=""><a href="http://www.hexagongeosystems.com" target="_blank" rel="noopener noreferrer"><span style="font-size:10pt; font-family:"Arial",sans-serif,serif,"EmojiFont"; color:rgb(5,99,193)">http://www.hexagongeosystems.com</span></a></span><br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com><br>
<b>Sent:</b> 03 August 2020 17:31<br>
<b>To:</b> PFLANZER Moritz <moritz.pflanzer@hexagon.com><br>
<b>Cc:</b> lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org><br>
<b>Subject:</b> Re: [lttng-dev] Help needed: No UST events recorded</font>
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<div class="PlainText">This email is not from Hexagon’s Office 365 instance. Please be careful while clicking links, opening attachments, or replying to this email.<br>
<br>
<br>
Hi Moritz<br>
<br>
What is your version of lttng-tools?<br>
<br>
lttng --version<br>
<br>
Please run the `hello` executable using the LTTNG_UST_DEBUG env variable, while<br>
tracing, and provide the output.<br>
<br>
pkill lttng-sessiond<br>
lttng-sessiond -b -vvv --verbose-consumer 2> /tmp/lttng-sessiond.log<br>
lttng create<br>
lttng enable-event -u -a<br>
lttng start<br>
LTTNG_UST_DEBUG=y ./hello<br>
lttng stop<br>
lttng destroy<br>
pkill lttng-sessiond<br>
<br>
Please also provide the /tmp/lttng-sessiond.log file via pastebin.<br>
<br>
I suspect that if you cross-compiled lttng-ust from the master branch that<br>
lttng-tools is not using the same version, resulting in the application not<br>
being able to register to the lttng-sessiond.<br>
<br>
Cheers<br>
<br>
On Mon, Aug 03, 2020 at 09:35:25AM +0000, PFLANZER Moritz via lttng-dev wrote:<br>
> Hi all!<br>
><br>
> I'm struggling to get userspace tracing working on an aarch64 platform (busybox on top of Linux 5.4.24 kernel). I followed the guidelines in the docs and am currently using this example program for testing:
<a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Flttng%2Flttng-ust%2Ftree%2Fmaster%2Fdoc%2Fexamples%2Fhello-static-lib&data=02%7C01%7C%7Ce141a6eb68ea4d4c93c508d837c25b99%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C0%7C0%7C637320655210160415&sdata=lPbFWob0G4U22ncUmqfz12Ha42xOymctYWCOJC34oC8%3D&reserved=0">
https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Flttng%2Flttng-ust%2Ftree%2Fmaster%2Fdoc%2Fexamples%2Fhello-static-lib&data=02%7C01%7C%7Ce141a6eb68ea4d4c93c508d837c25b99%7C1b16ab3eb8f64fe39f3e2db7fe549f6a%7C0%7C0%7C637320655210160415&sdata=lPbFWob0G4U22ncUmqfz12Ha42xOymctYWCOJC34oC8%3D&reserved=0</a><br>
> I cross-compiled lttng-ust and that example, but when I run the following commands on the platform no traces are recorded. If I use the same example on my x86 machine everything works as expected. (And kernelspace tracing is working on that aarch64 system.)<br>
><br>
> Any hints where I could start investigating the issue are welcome.<br>
><br>
> Regards,<br>
> Moritz<br>
><br>
> ~ # pwd<br>
> /root<br>
> ~ # lttng create<br>
> Spawning a session daemon<br>
> Session auto-20200720-174509 created.<br>
> Traces will be written in /root/lttng-traces/auto-20200720-174509<br>
> ~ # lttng enable-event -au<br>
> All UST events are enabled in channel channel0<br>
> ~ # lttng start<br>
> Tracing started for session auto-20200720-174509<br>
> ~ # ./hello<br>
> Hello, World!<br>
> Tracing... done.<br>
> ~ # lttng destroy<br>
> Session auto-20200720-174509 destroyed<br>
> ~ # ll<br>
> total 40<br>
> -rwxr-xr-x 1 root root 39280 Jul 20 17:44 hello*<br>
><br>
><br>
><br>
> Moritz Pflanzer<br>
> Software Development Engineer<br>
><br>
> [cid:image001.png@01D3BF6E.185110B0]<br>
><br>
> Räffelstrasse 28<br>
><br>
> 8045 Zürich<br>
> E: moritz.pflanzer@hexagon.com<mailto:moritz.pflanzer@hexagon.com><mailto:carolin.siebert@hexagon.com><br>
> W: <a href="http://www.hexagongeosystems.com/">http://www.hexagongeosystems.com/</a><br>
<br>
<br>
<br>
> _______________________________________________<br>
> lttng-dev mailing list<br>
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<br>
<br>
--<br>
Jonathan Rajotte-Julien<br>
EfficiOS<br>
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