[lttng-dev] Installing LTTNG on beaglebone black or rasberry pi

Fri Nov 18 14:56:48 UTC 2016

----- On Nov 18, 2016, at 8:09 AM, Nwafor, Ebelechukwu <ebelechukwu.nwafor at bison.howard.edu> wrote: 

> Hello Jonathan.

> I have tried every other thing on your last message. Attached is the output of
> the lttng-sessiond -vvv

Hi, 

An important line in your log is "Error: Could not get lock file /var/run/lttng/lttng-sessiond.lck, another instance is running.", 
which is pretty much self-explaining. 

Please refer to https://bugs.lttng.org/ "Bug reporting guidelines" to provide 
complete information on your issue. 

Thanks, 

Mathieu 

> Thanks.

> root at ebele-desktop:~# lttng-sessiond -vvv
> DEBUG1 - 20:29:17.718632 [8086/8086]: run_as signal handler set for SIGTERM and
> SIGINT (in set_worker_sighandlers() at runas.c:600)
> DEBUG1 - 20:29:17.719781 [8085/8085]: Health check time delta in seconds set to
> 20 (in health_init() at health.c:74)
> DEBUG1 - 20:29:17.720333 [8085/8085]: epoll set max size is 334459 (in
> compat_epoll_set_max_size() at compat-epoll.c:290)
> DEBUG3 - 20:29:17.720888 [8085/8085]: Creating LTTng run directory:
> /var/run/lttng (in create_lttng_rundir() at main.c:5156)
> DEBUG2 - 20:29:17.721063 [8085/8085]: Kernel consumer err path:
> /var/run/lttng/kconsumerd/error (in main() at main.c:5601)
> DEBUG2 - 20:29:17.721101 [8085/8085]: Kernel consumer cmd path:
> /var/run/lttng/kconsumerd/command (in main() at main.c:5603)
> Error: Could not get lock file /var/run/lttng/lttng-sessiond.lck, another
> instance is running.
> DEBUG1 - 20:29:17.721231 [8085/8085]: Cleanup sessiond (in sessiond_cleanup() at
> main.c:622)
> DEBUG1 - 20:29:17.721322 [8085/8085]: Removing sessiond and consumerd content of
> directory /var/run/lttng (in sessiond_cleanup() at main.c:641)
> DEBUG1 - 20:29:17.721360 [8085/8085]: Removing /var/run/lttng/lttng-sessiond.pid
> (in sessiond_cleanup() at main.c:647)
> DEBUG1 - 20:29:17.721417 [8085/8085]: Removing /var/run/lttng/agent.port (in
> sessiond_cleanup() at main.c:652)
> DEBUG1 - 20:29:17.721462 [8085/8085]: Removing /var/run/lttng/kconsumerd/error
> (in sessiond_cleanup() at main.c:659)
> DEBUG1 - 20:29:17.721510 [8085/8085]: Removing directory
> /var/run/lttng/kconsumerd (in sessiond_cleanup() at main.c:665)
> DEBUG1 - 20:29:17.721558 [8085/8085]: Removing
> /var/run/lttng/ustconsumerd32/error (in sessiond_cleanup() at main.c:672)
> DEBUG1 - 20:29:17.721602 [8085/8085]: Removing directory
> /var/run/lttng/ustconsumerd32 (in sessiond_cleanup() at main.c:678)
> DEBUG1 - 20:29:17.721647 [8085/8085]: Removing
> /var/run/lttng/ustconsumerd64/error (in sessiond_cleanup() at main.c:685)
> DEBUG1 - 20:29:17.721693 [8085/8085]: Removing directory
> /var/run/lttng/ustconsumerd64 (in sessiond_cleanup() at main.c:691)
> DEBUG1 - 20:29:17.721734 [8085/8085]: Cleaning up all sessions (in
> sessiond_cleanup() at main.c:694)
> DEBUG1 - 20:29:17.721765 [8085/8085]: Cleaning up all agent apps (in
> sessiond_cleanup() at main.c:711)
> DEBUG1 - 20:29:17.721796 [8085/8085]: Closing all UST sockets (in
> sessiond_cleanup() at main.c:714)
> DEBUG2 - 20:29:17.721825 [8085/8085]: UST app cleaning registered apps hash
> table (in ust_app_clean_list() at ust-app.c:3702)
> DEBUG3 - 20:29:17.721856 [8085/8085]: Buffer registry destroy all registry (in
> buffer_reg_destroy_registries() at buffer-registry.c:716)
> DEBUG2 - 20:29:17.721886 [8085/8085]: Closing kernel fd (in sessiond_cleanup()
> at main.c:719)
> DEBUG1 - 20:29:17.721914 [8085/8085]: Unloading kernel modules (in
> sessiond_cleanup() at main.c:726)
> DEBUG1 - 20:29:17.722118 [8085/8087]: [ht-thread] startup. (in
> thread_ht_cleanup() at ht-cleanup.c:37)
> DEBUG3 - 20:29:17.723951 [8085/8087]: [ht-thread] Polling. (in
> thread_ht_cleanup() at ht-cleanup.c:67)
> DEBUG1 - 20:29:17.736599 [8085/8085]: Modprobe removal successful
> lttng-kretprobes (in modprobe_remove_lttng() at modprobe.c:126)
> DEBUG1 - 20:29:17.750243 [8085/8085]: Modprobe removal successful lttng-kprobes
> (in modprobe_remove_lttng() at modprobe.c:126)
> DEBUG1 - 20:29:17.763239 [8085/8085]: Modprobe removal successful lttng-ftrace
> (in modprobe_remove_lttng() at modprobe.c:126)
> DEBUG1 - 20:29:17.778109 [8085/8085]: Modprobe removal successful lttng-types
> (in modprobe_remove_lttng() at modprobe.c:126)
> DEBUG1 - 20:29:17.793153 [8085/8085]: Modprobe removal successful
> lttng-ring-buffer-metadata-mmap-client (in modprobe_remove_lttng() at
> modprobe.c:126)
> DEBUG1 - 20:29:17.810951 [8085/8085]: Modprobe removal successful
> lttng-ring-buffer-client-mmap-overwrite (in modprobe_remove_lttng() at
> modprobe.c:126)
> DEBUG1 - 20:29:17.823876 [8085/8085]: Modprobe removal successful
> lttng-ring-buffer-client-mmap-discard (in modprobe_remove_lttng() at
> modprobe.c:126)
> DEBUG1 - 20:29:17.836698 [8085/8085]: Modprobe removal successful
> lttng-ring-buffer-metadata-client (in modprobe_remove_lttng() at
> modprobe.c:126)
> DEBUG1 - 20:29:17.849417 [8085/8085]: Modprobe removal successful
> lttng-ring-buffer-client-overwrite (in modprobe_remove_lttng() at
> modprobe.c:126)
> DEBUG1 - 20:29:17.864495 [8085/8085]: Modprobe removal successful
> lttng-ring-buffer-client-discard (in modprobe_remove_lttng() at modprobe.c:126)
> DEBUG1 - 20:29:17.879363 [8085/8085]: Modprobe removal successful
> lttng-lib-ring-buffer (in modprobe_remove_lttng() at modprobe.c:126)
> DEBUG1 - 20:29:17.896710 [8085/8085]: Modprobe removal successful lttng-tracer
> (in modprobe_remove_lttng() at modprobe.c:126)
> DEBUG3 - 20:29:17.897048 [8085/8087]: [ht-thread] Returning from poll on 2 fds.
> (in thread_ht_cleanup() at ht-cleanup.c:74)
> DEBUG1 - 20:29:17.897154 [8085/8087]: [ht-cleanup] quit. (in thread_ht_cleanup()
> at ht-cleanup.c:153)
> DEBUG1 - 20:29:17.897262 [8085/8087]: [ht-cleanup] Thread terminates. (in
> thread_ht_cleanup() at ht-cleanup.c:164)
> DEBUG1 - 20:29:17.897743 [8085/8085]: Cleaning up options (in
> sessiond_cleanup_options() at main.c:773)
> DEBUG1 - 20:29:17.901442 [8085/8085]: lttng-runas terminated with status code 0
> (in run_as_destroy_worker() at runas.c:737)
> DEBUG1 - 20:29:17.901548 [8085/8085]: *** assert failed :-) *** ==> Matthew,
> BEET driven development works! (in sessiond_cleanup_options() at main.c:805)
> root at ebele-desktop:~#

> On Thu, Nov 17, 2016 at 7:38 PM, Jonathan Rajotte Julien < [
> mailto:Jonathan.rajotte-julien at efficios.com |
> Jonathan.rajotte-julien at efficios.com ] > wrote:

>> Hi,

>> On 2016-11-17 07:24 PM, Nwafor, Ebelechukwu wrote:

>>> Thanks Jonathan for you helpful response. I was able to install the specific
>>> linux-headers and it seems to install all of the modules. Now i've hit another
>>> roadblock. whenever i try to list all of the kernel events using lttng list -k,
>>> it throws an error: unable to list kernel events: Kernel tracer is not
>>> available. I have two lttng-sessiond running.

>> Terminate both of them. Since you installed it from apt-get the lttng-tools
>> package provide a service for lttng-sessiond implying that the lttng-sessiond
>> process should get restarted automatically if killed.

>> Again, make sure that the user issuing the "lttng list -k" is part of the
>> "tracing" group or simply root.

>> If this still does not work refer to the last email and stop the service then,
>> as root, launch "lttng-sessiond -vvv" and check the output to make sure that
>> the modules gets loaded.

>> Open another terminal and test the kernel tracepoint listing.

>> If this does not work make sure to include the output from "lttng-sessiond -vvv"
>> in your next email.

>> Cheers

>>> On Thu, Nov 17, 2016 at 4:45 PM, Jonathan Rajotte Julien < [
>>> mailto:Jonathan.rajotte-julien at efficios.com |
>>> Jonathan.rajotte-julien at efficios.com ] <mailto: [
>>> mailto:Jonathan.rajotte-julien at efficios.com |
>>> Jonathan.rajotte-julien at efficios.com ] >> wrote:

>>> Hi,

>>> On 2016-11-17 04:24 PM, Nwafor, Ebelechukwu wrote:

>>> Hi Jonathan. Thank you for your response.

>>> On the beaglebone black, i tried building lttng-tools,
>>> lttng-modules-dkms and lttng-ust-dev from source v2.8.1 by
>>> following the documentation. lttng-modules-dkms runs fine but
>>> the module does not show up on the list of running modules
>>> when i issue an lsmod command. Also, i run into errors while
>>> trying to build and compile lttng-tools. Beaglebone black runs
>>> on debian. Linux beaglebone 3.8.13-bone70 #1 SMP Fri Jan 23
>>> 02:15:42 UTC 2015 armv7l GNU/Linux

>>> What errors do you see when building lttng-tools?

>>> On the raspberry pi, I use the commands, apt-get install
>>> lttng-modules-dkms lttng-tools lttng-ust-dev. Everything seems
>>> to work fine with the exception of lttng-modules-dkms which
>>> does not show up on the list on running modules. Also, every
>>> time i try to view available kernel events, it comes up with
>>> an error saying unable to list kernel events: kernel tracer
>>> not available. The LTTNG version installed using apt-get is
>>> 2.7.1. I am running ubuntu mate OS. Below are the output while
>>> installing lttng-modules-dkms

>>> Well as the error points out do you have the kernel tracer started?

>>> ps -aux | grep lttng-sessiond

>>> Does the user trying to use lttng is part of the tracing group or
>>> is root ?

>>> You can start lttng-sessiond with the -vvv options make sure to be
>>> root when doing so lttng-sessiond load the tracing modules.

>>> Since you installed it from apt-get the lttng-tools package
>>> provide a daemon for lttng-sessiond so before testing manually:

>>> service lttng-sessiond stop

>>> root at ebele-desktop:~# apt-get install lttng-modules-dkms
>>> Reading package lists... Done
>>> Building dependency tree
>>> Reading state information... Done
>>> lttng-modules-dkms is already the newest version (2.7.1-1).
>>> 0 upgraded, 0 newly installed, 0 to remove and 14 not upgraded.
>>> 2 not fully installed or removed.
>>> After this operation, 0 B of additional disk space will be used.
>>> Do you want to continue? [Y/n] Y
>>> Setting up linux-headers-4.4.0-22 (4.4.0-22.40) ...
>>> Setting up lttng-modules-dkms (2.7.1-1) ...
>>> Loading new lttng-modules-2.7.1 DKMS files...
>>> First Installation: checking all kernels...
>>> dpkg: warning: version '*-*' has bad syntax: version number
>>> does not start with digit
>>> It is likely that 4.4.30-v7+ belongs to a chroot's host
>>> Module build for the currently running kernel was skipped
>>> since the
>>> kernel source for this kernel does not seem to be installed.

>>> Could you make sure that your linux header for the running kernel
>>> are installed.

>>> 4.4.30-v7+ seems like a custom kernel install.

>>> root at ebele-desktop:~#

>>> On Thu, Nov 17, 2016 at 3:00 PM, Jonathan Rajotte
>>> < [ mailto:jonathan.r.julien at gmail.com | jonathan.r.julien at gmail.com ]
>>> <mailto: [ mailto:jonathan.r.julien at gmail.com | jonathan.r.julien at gmail.com ] >
>>> <mailto: [ mailto:jonathan.r.julien at gmail.com | jonathan.r.julien at gmail.com ]
>>> <mailto: [ mailto:jonathan.r.julien at gmail.com | jonathan.r.julien at gmail.com ]
>>> >>> wrote:

>>> Hi,

>>> Could you be a bit more precise regarding which part of the
>>> documentation does not work ?

>>> How did you install it ? Distribution packages ? From
>>> sources ?
>>> Cross compiled ?

>>> What is your setup ? Raspian for the Pi ? Custom kernel
>>> image ?

>>> Cheers

>>> On Thu, Nov 17, 2016 at 2:54 PM, Nwafor, Ebelechukwu
>>> < [ mailto:ebelechukwu.nwafor at bison.howard.edu |
>>> ebelechukwu.nwafor at bison.howard.edu ]
>>> <mailto: [ mailto:ebelechukwu.nwafor at bison.howard.edu |
>>> ebelechukwu.nwafor at bison.howard.edu ] >
>>> <mailto: [ mailto:ebelechukwu.nwafor at bison.howard.edu |
>>> ebelechukwu.nwafor at bison.howard.edu ]
>>> <mailto: [ mailto:ebelechukwu.nwafor at bison.howard.edu |
>>> ebelechukwu.nwafor at bison.howard.edu ] >>> wrote:

>>> Hello.

>>> I am trying to install LTTNG tracing tool on raspberry
>>> pi and
>>> beaglebone black board.The official LTTNG
>>> documentation does
>>> not work on these devices. Does anyone know of any
>>> tutorial
>>> that can help me accomplish this? Thanks.

>>> -- Ebelechukwu Nwafor,
>>> Graduate Student,
>>> Howard University.

>>> _______________________________________________
>>> lttng-dev mailing list
>>> [ mailto:lttng-dev at lists.lttng.org | lttng-dev at lists.lttng.org ] <mailto: [
>>> mailto:lttng-dev at lists.lttng.org | lttng-dev at lists.lttng.org ] >
>>> <mailto: [ mailto:lttng-dev at lists.lttng.org | lttng-dev at lists.lttng.org ]
>>> <mailto: [ mailto:lttng-dev at lists.lttng.org | lttng-dev at lists.lttng.org ] >>
>>> [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ]
>>> < [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ] >
>>> < [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ]
>>> < [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ] >>

>>> -- Jonathan Rajotte Julien

>>> -- Ebelechukwu Nwafor,
>>> Graduate Student,
>>> Howard University.

>>> _______________________________________________
>>> lttng-dev mailing list
>>> [ mailto:lttng-dev at lists.lttng.org | lttng-dev at lists.lttng.org ] <mailto: [
>>> mailto:lttng-dev at lists.lttng.org | lttng-dev at lists.lttng.org ] >
>>> [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ]
>>> < [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ] >

>>> -- Jonathan R. Julien
>>> Efficios

>>> _______________________________________________
>>> lttng-dev mailing list
>>> [ mailto:lttng-dev at lists.lttng.org | lttng-dev at lists.lttng.org ] <mailto: [
>>> mailto:lttng-dev at lists.lttng.org | lttng-dev at lists.lttng.org ] >
>>> [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ]
>>> < [ https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev |
>>> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ] >

>>> --
>>> Ebelechukwu Nwafor,
>>> Graduate Student,
>>> Howard University.

>> --
>> Jonathan R. Julien
>> Efficios

> --
> Ebelechukwu Nwafor,
> Graduate Student,
> Howard University.

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

-- 
Mathieu Desnoyers 
EfficiOS Inc. 
http://www.efficios.com 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.lttng.org/pipermail/lttng-dev/attachments/20161118/a7d63f2b/attachment-0001.html>