[lttng-dev] lttng list --userspace is null

[lttng-dev] lttng list --userspace is null

[bule via lttng-dev]

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hi ,
   I used lttng-ust in my project, it's a dpdk program. I built and run it
, and run lttng list --userspace in another terminal ,but the result is
null.
[image: image.png]
   And gdb disassemble result has lttng_ust_tracepoint.
[image: image.png]

   Then I used lttng-ust in a demo, it works ok.
[image: image.png]
so ,  how to fix it ?

Best regards

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Re: [lttng-dev] lttng list --userspace is null

[Jérémie Galarneau via lttng-dev]

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Hi,

Just to make sure, is your program still running by the time you issue 'lttng list --userspace'?
Also, which versions of LTTng are you running and on what kind of system?

Are the session daemon and application running under the same user?

Please run your application with the LTTNG_UST_DEBUG environment variable set to '1' and provide the output. This will help understand where things go wrong.

Thanks,
Jérémie

--
Jérémie Galarneau
EfficiOS Inc.
https://www.efficios.com
________________________________
From: lttng-dev <lttng-dev-bounces@lists.lttng.org> on behalf of bule via lttng-dev <lttng-dev@lists.lttng.org>
Sent: November 4, 2022 06:52
To: lttng-dev@lists.lttng.org <lttng-dev@lists.lttng.org>
Subject: [lttng-dev] lttng list --userspace is null

hi ,
   I used lttng-ust in my project, it's a dpdk program. I built and run it , and run lttng list --userspace in another terminal ,but the result is null.
[image.png]
   And gdb disassemble result has lttng_ust_tracepoint.
[image.png]

   Then I used lttng-ust in a demo, it works ok.
[image.png]
so ,  how to fix it ?

Best regards

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[-- Type: image/png, Size: 144646 bytes --]

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[-- Type: image/png, Size: 58536 bytes --]

[-- Attachment #2: Type: text/plain, Size: 156 bytes --]

_______________________________________________
lttng-dev mailing list
lttng-dev@lists.lttng.org
https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev