<div dir="ltr"><div>Philippe,</div><div><br></div><div>On "3.19.0-30-generic #34~14.04.1-Ubuntu", apt-get won't install anything else, is LTTng 2.6 (or 2.7) user space backward compatible with kernel 3.19?</div><div>I remember a while back trying to build the 2.7 kernel LTTng modules and got build errors, required additional packages versions that were not available for 3.19 and upgrading to a newer kernel is problematic,</div><div><br></div><div>thanks, John</div><div> </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 2, 2015 at 6:02 PM, Philippe Proulx <span dir="ltr"><<a href="mailto:eeppeliteloop@gmail.com" target="_blank">eeppeliteloop@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Okay,<div><br></div><div>You should know, however, that LTTng 2.4 is not supported anymore. There could be bugs in there not fixed in this version. Any chance you can upgrade to at least LTTng 2.6 (2.7 is better)?</div></div><div class="gmail_extra"><span class="HOEnZb"><font color="#888888"><br clear="all"><div><div>Philippe Proulx</div></div></font></span><div><div class="h5">
<br><div class="gmail_quote">On Wed, Dec 2, 2015 at 7:31 PM, John Smith <span dir="ltr"><<a href="mailto:whalajam@gmail.com" target="_blank">whalajam@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr"><div>Philippe,</div><div>it doesn't work:</div><div><br></div><div>babeltrace -o ctf-metadata /home/john.s/lttng-traces/auto-20151202-162100<br>[error] at line 1147: token "(": syntax error, unexpected LPAREN, expecting SEMICOLON or COMMA</div><div>[error] Error creating AST<br>[warning] Unable to open trace metadata for path "/home/john.s/lttng-traces/auto-20151202-162100/ust/uid/0/64-bit".<br>[warning] [Context] Cannot open_trace of format ctf at path /home/john.s/lttng-traces/auto-20151202-162100/ust/uid/0/64-bit.<br>[warning] [Context] cannot open trace "/home/john.s/lttng-traces/auto-20151202-162100/ust/uid/0/64-bit" from /home/john.s/lttng-traces/auto-20151202-162100 for reading.<br>[error] Cannot open any trace for reading.</div><div>[error] opening trace "/home/john.s/lttng-traces/auto-20151202-162100" for reading.</div><div><br></div><div>The logs are populated:</div><div><br></div><div>ls -l /home/john.s/lttng-traces/auto-20151202-162100/ust/uid/0/64-bit/<br>total 884<br>-rw-rw---- 1 john.s john.s 8192 Dec 2 16:21 channel0_0<br>-rw-rw---- 1 john.s john.s 4096 Dec 2 16:21 channel0_1<br></div><div>...</div><div>-rw-rw---- 1 john.s john.s 4096 Dec 2 16:21 channel0_9<br>drwxrwx--- 2 john.s john.s 4096 Dec 2 16:21 index<br>-rw-rw---- 1 john.s john.s 98304 Dec 2 16:21 metadata<br></div><div><br></div><div>thanks, John<br></div></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 2, 2015 at 11:30 AM, Philippe Proulx <span dir="ltr"><<a href="mailto:eeppeliteloop@gmail.com" target="_blank">eeppeliteloop@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div dir="ltr">John,<div><br></div><div>Can you pastebin the trace's metadata file? Use:</div><div><br></div><div> babeltrace -o ctf-metadata /path/to/trace</div><div><br></div><div>to get it.</div><div><br></div><div>Thanks,</div></div><div class="gmail_extra"><br clear="all"><div><div>Philippe Proulx</div></div>
<br><div class="gmail_quote"><div><div>On Tue, Dec 1, 2015 at 9:19 PM, John Smith <span dir="ltr"><<a href="mailto:whalajam@gmail.com" target="_blank">whalajam@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><div><div><div dir="ltr"><div>Hi,</div><div><br></div><div>issued the regular following lttng commands:<br>[<br>lttng create<br>lttng enable-event -u -a<br>lttng start</div><div><run-my-app></div><div>lttng stop<br>lttng view<br>]</div><p>"lttng view" command fails with the following:</p><p>[error] at line 1269: token "(": syntax error, unexpected LPAREN, expecting SEMICOLON or COMMA</p><div>Environment info:</div><div>[</div><div>$ uname -a<br>Linux slab134 3.19.0-30-generic #34~14.04.1-Ubuntu SMP Fri Oct 2 22:09:39 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux</div><div>$ lttng --version<br>lttng (LTTng Trace Control) 2.4.0 - Époque Opaque</div><div>]</div><div><br></div><div>I used also:</div><div>lttng view -e "babeltrace -n all -v -d"</div><div><br></div><div>but the output is not revealing any comprehensible details.</div><div><br></div><div>What mistake could lead to such a disastrous failure?</div><div><br></div><div>thanks, John</div></div>
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