Hi Evan,

Hi there

Thanks for help on my previous issue. I was able to get callstack-user to work and see it in my traces. However, in order to get it to run I needed to enable-event --kernel all. Is it necessary to have all kernel events enabled to run callstack-user? Or is it just one specific event?

When I try to run it without enabling all kernel events the command is accepted and it runs but I get the following error when trying to view my traces:

 (╯°□°)╯︵ ┻━┻ ctf-meta-update-value-storing-indexes.c:65: update_field_class_stored_value_index(): Assertion `tgt_fc` failed.
Aborted (core dumped)

What does this error mean? Should I just continue to enable all kernel events?

It's a Babeltrace 2 error. Now, we need to find out if the root cause is the LTTng kernel tracer or Babeltrace2 itself.

What is the "one specific event" you're enabling that seems to cause this issue?

Do you have access to a Babeltrace 1.5 build? if so, could you try to read that same trace using it?

Could you please share a small trace reproducing this issue?

What version of LTTng-tools, LTTng-Modules, and Babeltrace2 are you using?

Cheers,

Francis

My current command setup, not sure if relevant

lttng create &&
lttng enable-channel mychannel --subbuf-size 100000000
lttng enable-event --kernel --all &&
lttng add-context -u -t vpid -t vtid -t procname &&
lttng add-context --kernel --type callstack-user &&
lttng add-context --kernel --type callstack-kernel &&
lttng enable-event --jul jello

again thank you for your time

Evan Galea

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