Hi Moritz What is your version of lttng-tools?
lttng --version Please run the `hello` executable using the LTTNG_UST_DEBUG env variable, while tracing, and provide the output. pkill lttng-sessiond lttng-sessiond -b -vvv --verbose-consumer 2> /tmp/lttng-sessiond.log lttng create lttng enable-event -u -a lttng start LTTNG_UST_DEBUG=y ./hello lttng stop lttng destroy pkill lttng-sessiond Please also provide the /tmp/lttng-sessiond.log file via pastebin. I suspect that if you cross-compiled lttng-ust from the master branch that lttng-tools is not using the same version, resulting in the application not being able to register to the lttng-sessiond. Cheers On Mon, Aug 03, 2020 at 09:35:25AM +0000, PFLANZER Moritz via lttng-dev wrote: > Hi all! > > 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: > https://github.com/lttng/lttng-ust/tree/master/doc/examples/hello-static-lib > 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.) > > Any hints where I could start investigating the issue are welcome. > > Regards, > Moritz > > ~ # pwd > /root > ~ # lttng create > Spawning a session daemon > Session auto-20200720-174509 created. > Traces will be written in /root/lttng-traces/auto-20200720-174509 > ~ # lttng enable-event -au > All UST events are enabled in channel channel0 > ~ # lttng start > Tracing started for session auto-20200720-174509 > ~ # ./hello > Hello, World! > Tracing... done. > ~ # lttng destroy > Session auto-20200720-174509 destroyed > ~ # ll > total 40 > -rwxr-xr-x 1 root root 39280 Jul 20 17:44 hello* > > > > Moritz Pflanzer > Software Development Engineer > > [cid:image001.png@01D3BF6E.185110B0] > > Räffelstrasse 28 > > 8045 Zürich > E: > moritz.pflan...@hexagon.com<mailto:moritz.pflan...@hexagon.com><mailto:carolin.sieb...@hexagon.com> > W: http://www.hexagongeosystems.com > _______________________________________________ > lttng-dev mailing list > lttng-dev@lists.lttng.org > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Jonathan Rajotte-Julien EfficiOS _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
