Am 25.11.2013 18:00, schrieb Jérémie Galarneau:
On Mon, Nov 25, 2013 at 10:53 AM, Thibault, Daniel
<[email protected]> wrote:
Date: Sun, 24 Nov 2013 19:26:05 +0100
From: Klaus Dannecker <[email protected]>
Interesting. Would you mind running "lttng start" in verbose mode and
provide the output?
lttng -vvv start
klaus@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@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,
Jérémie
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@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
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