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--></style></div><div><br></div><div><span id="zwchr" data-marker="__DIVIDER__">----- On Aug 9, 2016, at 12:24 PM, Corbin, Craig <ccorbi02@harris.com> wrote:<br></span></div><div data-marker="__QUOTED_TEXT__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div class="WordSection1"><p class="MsoNormal" style="margin-bottom:12.0pt;line-height:14.65pt;background:#F4EAEA"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#242729">I am running lttng on an arm board. I am having an issue when tracing the kernel, i don't have any trace file. I do notice i have a bunch of Unknown symbol outputs when spawning the
session deamon. But if i run lttng create again i don't see these messages pop up. But the main issue is that if i do</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">#lttng create</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">#lttng enable-event --kernel --syscall --all</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">#lttng start</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">#lttng stop</span></p><p class="MsoNormal" style="margin-bottom:12.0pt;line-height:14.65pt;background:#F4EAEA"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#242729">I don't have anything in my trace session folder. I expected to see the trace file being dumped here after lttng stop.</span></p><p class="MsoNormal" style="margin-bottom:12.0pt;line-height:14.65pt;background:#F4EAEA"><span style="font-size:11.5pt;font-family:"Arial",sans-serif;color:#242729">Below is what i get the first time i run lttng create</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in"># lttng create</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">Spawning a session daemon</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.874182] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_release_read (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.883131] lttng_ring_buffer_client_discard: Unknown symbol channel_get_ring_buffer (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.891602] lttng_ring_buffer_client_discard: Unknown symbol lttng_transport_unregister (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.900336] lttng_ring_buffer_client_discard: Unknown symbol channel_destroy (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.908116] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_memset (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.916584] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_write (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.924967] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_offset_address (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.934049] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_strcpy_from_user_inatomic
(err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.944188] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_reserve_slow (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.953104] lttng_ring_buffer_client_discard: Unknown symbol lttng_last_tsc (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.960790] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_strcpy (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.969261] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_read_offset_address (err
0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.978773] lttng_ring_buffer_client_discard: Unknown symbol _lib_ring_buffer_copy_from_user_inatomic
(err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.988724] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_nesting (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 74.997202] lttng_ring_buffer_client_discard: Unknown symbol lttng_transport_register (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 75.005761] lttng_ring_buffer_client_discard: Unknown symbol lttng_trace_clock (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 75.013709] lttng_ring_buffer_client_discard: Unknown symbol lib_ring_buffer_open_read (err 0)</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">[ 75.022343] lttng_ring_buffer_client_discard: Unknown symbol channel_create (err 0)</span></p></div></blockquote><div><br></div><div>The warnings above should not be there. Make sure your kernel meets the lttng-modules<br data-mce-bogus="1"></div><div>README file requirements, and that you issued depmod -a.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Perhaps try to rebuild/re-install lttng-modules.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Thanks,<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Mathieu<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><div class="WordSection1"><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">Session auto-19700101-000114 created.</span></p><p class="MsoNormal" style="background:#F4EAEA"><span style="font-size:10.0pt;font-family:Consolas;color:#242729;border:none windowtext 1.0pt;padding:0in">Traces will be written in //lttng-traces/auto-19700101-000114</span></p></div><br>_______________________________________________<br>lttng-dev mailing list<br>lttng-dev@lists.lttng.org<br>https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev<br></blockquote></div><div><br></div><div data-marker="__SIG_POST__">-- <br></div><div>Mathieu Desnoyers<br>EfficiOS Inc.<br>http://www.efficios.com</div></div></body></html>