From mboxrd@z Thu Jan 1 00:00:00 1970 From: klaus.dannecker@gmx.de (Klaus Dannecker) Date: Mon, 25 Nov 2013 19:14:48 +0100 Subject: [lttng-dev] make a trace_event in a module (driver) In-Reply-To: References: <48CF5AC71E61DB46B70D0F388054EFFD267A5DA9@VAL-E-01.valcartier.drdc-rddc.gc.ca> Message-ID: <52939398.20807@gmx.de> Am 25.11.2013 18:00, schrieb J?r?mie Galarneau: > On Mon, Nov 25, 2013 at 10:53 AM, Thibault, Daniel > wrote: >>> Date: Sun, 24 Nov 2013 19:26:05 +0100 >>> From: Klaus Dannecker >>> >>>> Interesting. Would you mind running "lttng start" in verbose mode and >>>> provide the output? >>>> lttng -vvv start >>> klaus at ubuntu:~$ sudo lttng -vvv start >>> DEBUG2 [2854/2854]: Config file path found: /home/klaus (in get_session_name() at utils.c:57) >>> DEBUG1 [2854/2854]: Session name found: auto-20131124-091639 (in get_session_name() at utils.c:58) >>> DEBUG1 [2854/2854]: Starting tracing for session auto-20131124-091639 (in start_tracing() at commands/start.c:81) >>> DEBUG1 [2854/2854]: LSM cmd type : 16 (in send_session_msg() at lttng-ctl.c:131) >>> 'ctrl c' >>> klaus at ubuntu:~$ >> Definitely looks like a module loading problem. >> >>>> lttng-modules does not define an "uninstall" make target. I guess >>>> you'll have to delete the modules manually under /lib/modules/$(uname >>>> -r)/extra /lib/modules/$(uname -r)/extra/lib /lib/modules/$(uname >>>> -r)/extra/probes >>>> >>>> I'm wondering if it could be a conflict with your distribution's >>>> lttng-modules-dkms package... Could you verify that it is not >>>> installed? >>> now i make two experiments: >>> first: >>> install ubuntu 12.04 in vmware >>> $ git clone git://git.lttng.org/lttng-tools.git >>> $ git clone git://git.lttng.org/lttng-modules.git >>> $ git clone git://git.lttng.org/lttng-ust.git >>> $ git clone git://git.lttng.org/userspace-rcu.git >>> compile and install all like: >>> https://www.ibm.com/developerworks/community/blogs/fe313521-2e95-46f2-817d-44a4f27eba32/entry/howto_tracing_with_lttng?lang=en >>> now i have the same problem. >> Aha! There is one crucial mistake in the ibm.com document: he installs the packages in the wrong order. lttng-tools must be installed AFTER lttng-modules and lttng-ust. lttng-modules can be installed before, during or after lttng-ust, but userspace-rcu must be installed before lttng-ust. >> The problem is that the configure of lttng-tools detects the presence or absence of lttng-modules and also detects the presence or absence of lttng-ust, and adjusts to both. By installing lttng-tools before lttng-modules, you've built an lttng-tools set that CANNOT be used to trace the kernel. >> >> So, try again from scratch, making sure to install lttng-tools last. >> > lttng-tools checks for kernel modules at run time, not at configure > time. You can safely install lttng-modules after lttng-tools and still > use kernel tracing. > > Regards, > J?r?mie ok, but what can i do? >>> second: >>> install ubuntu 12.04 in vmware >>> sudo apt-get install lttng-tools >>> ... >>> Building only for 3.8.0-29-generic >>> Building initial module for 3.8.0-29-generic >>> Error! Bad return status for module build on kernel: 3.8.0-29-generic (i686) >>> Consult /var/lib/dkms/lttng-modules/2.0.2/build/make.log for more information. >>> Setting up lttng-tools (2.0.1-0ubuntu1) ... >>> /usr/sbin/addgroup >>> lttng-sessiond start/running, process 5515 >>> Processing triggers for libc-bin ... >>> ldconfig deferred processing now taking place >>> klaus at ubuntu:~$ >> The Ubuntu lttng 2.0.1 install will very likely run into trouble against kernel 3.8 because of the new module signing requirements. how can i signing the module? Regards, Klaus >>> $ git clone git://git.lttng.org/lttng-modules.git >>> compile and install lttng_modules >>> >>> now works lttng start, stop and destroy! >>> >>> Klaus >> Daniel U. Thibault >> Protection des syst?mes et contremesures (PSC) | Systems Protection & Countermeasures (SPC) >> Cyber s?curit? pour les missions essentielles (CME) | Mission Critical Cyber Security (MCCS) >> R & D pour la d?fense Canada - Valcartier (RDDC Valcartier) | Defence R&D Canada - Valcartier (DRDC Valcartier) >> 2459 route de la Bravoure >> Qu?bec QC G3J 1X5 >> CANADA >> Vox : (418) 844-4000 x4245 >> Fax : (418) 844-4538 >> NAC : 918V QSDJ >> Gouvernement du Canada | Government of Canada >> >> >> _______________________________________________ >> lttng-dev mailing list >> lttng-dev at lists.lttng.org >> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev > >