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* [lttng-dev] lttng - ubuntu 11.10 - problem
@ 2012-06-15  7:41 somanath sahoo
  2012-06-15  8:16 ` Francis Giraldeau
  0 siblings, 1 reply; 11+ messages in thread
From: somanath sahoo @ 2012-06-15  7:41 UTC (permalink / raw)


Hi,

As i am new to lttng usage, I have followed the instructions from <https://launchpad.net/~lttng/+archive/ppa> in order to install the lttng tool set in my ubuntu 11.10.
After successful installation, i followed the getting started link on lttng.org <http://lttng.org/quickstart> in "root mode".

1. when i am executing the first command - 

??? # lttng list -k

??? i am getting the following error
??? " Error: Unable to list kernel events"

2. # lttng create mysession
??? Session mysession created.

3. # lttng enable-event sched_switch,sched_process_fork -k
??? Error: Event sched_switch: Kernel tracer not available (channel channel0, session mysession)
??? Error: Event sched_process_fork: Kernel tracer not available (channel channel0, session mysession)
??? Warning: Some command(s) went wrong?


4. # lttng start
??? Tracing started for session mysession

5. # lttng stop
??? Tracing stopped for session mysession

6.? # lttng destroy
??? Session mysession destroyed at /root

------------

I have checked that lttng-sessiond is running by below command 


# ps -ef|grep lttn
root?????? 535???? 1? 0 Jun14 ???????? 00:00:00 lttng-sessiond
somanath? 5359???? 1? 0 Jun14 pts/1??? 00:00:00 lttng-sessiond --sig-parent --quiet
root???? 19514 19495? 0 12:44 pts/2??? 00:00:00 grep --color=auto lttn

--------------

Could anyone please help me to understand or clarify why kernel tracer is not available when above point (3) / (1) is executed or whether i need to do anything more , please let me know so that i can start using lttng in ubuntu 11.10 successfully.


I have googled about this problem, I got to know about this similar problem from one link - http://www.mail-archive.com/lttng-dev at lists.lttng.org/msg00763.html
However i executed all this commands under root and explicit lttng-seesiond start, But still the problem is persistant.



Any help will be appreciated.


Thanks & Regards,
Somanath
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^ permalink raw reply	[flat|nested] 11+ messages in thread
* [lttng-dev] lttng - ubuntu 11.10 - problem
@ 2012-06-18  6:59 somanath sahoo
  2012-06-18 13:42 ` Mathieu Desnoyers
  0 siblings, 1 reply; 11+ messages in thread
From: somanath sahoo @ 2012-06-18  6:59 UTC (permalink / raw)


Hi,

I have tried to reinstall lttng-tools,? lttng-modules-dkms? and babeltrace. 


the reinstallation of lttng-tools and babeltrace has been successful. But reinstallation of lttng-modules-dkms has been failing. the log is provided below

-------------------------start of log--------------

# apt-get install --reinstall lttng-modules-dkms
Reading package lists... Done
Building dependency tree?????? 
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 0 B/198 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 199394 files and directories currently installed.)
Preparing to replace lttng-modules-dkms 2.0.0-0ubuntu2~oneiric1 (using .../lttng-modules-dkms_2.0.0-0ubuntu2~oneiric1_all.deb) ...

------------------------------
Deleting module version: 2.0.0
completely from the DKMS tree.
------------------------------
Done.
Unpacking replacement lttng-modules-dkms ...
Setting up lttng-modules-dkms (2.0.0-0ubuntu2~oneiric1) ...
Loading new lttng-modules-2.0.0 DKMS files...
Building only for 3.0.0-21-generic
Building initial module for 3.0.0-21-generic
Error! Bad return status for module build on kernel: 3.0.0-21-generic (i686)
Consult /var/lib/dkms/lttng-modules/2.0.0/build/make.log for more information.

------------------------------ END OF LOG -------------------------

The content of make.log is provided below : 


DKMS make.log for lttng-modules-2.0.0 for kernel 3.0.0-21-generic (i686)
Mon Jun 18 12:05:51 IST 2012
make: Entering directory `/usr/src/linux-headers-3.0.0-21-generic'
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-ring-buffer-client-discard.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-ring-buffer-client-overwrite.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-ring-buffer-metadata-client.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-ring-buffer-client-mmap-discard.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-ring-buffer-client-mmap-overwrite.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-ring-buffer-metadata-mmap-client.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-statedump-impl.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/wrapper/irqdesc.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-events.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-abi.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-probes.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-pid.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-procname.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-prio.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-nice.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-vpid.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-tid.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-vtid.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-ppid.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-context-vppid.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-calibrate.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/wrapper/random.o
? CC [M]? /var/lib/dkms/lttng-modules/2.0.0/build/lttng-syscalls.o
/var/lib/dkms/lttng-modules/2.0.0/build/lttng-syscalls.c:32:38: error: macro "is_compat_task" passed 1 arguments, but takes just 0
/var/lib/dkms/lttng-modules/2.0.0/build/lttng-syscalls.c:33:1: error: expected ?=?, ?,?, ?;?, ?asm? or ?__attribute__? before ?{? token
make[1]: *** [/var/lib/dkms/lttng-modules/2.0.0/build/lttng-syscalls.o] Error 1
make: *** [_module_/var/lib/dkms/lttng-modules/2.0.0/build] Error 2
make: Leaving directory `/usr/src/linux-headers-3.0.0-21-generic'

------------------------- End of make.log -----------------

As per the compilation errors in the file lttng-syscalls.c, i dont think these errors are valids. It may be due to somethings else.


Kindly guide how to come over this reinstallation problem of "lttng-modules-dkms" and please let me know if i need to do any other alternatives.




Thanks & Regards,
Somanath


------------------------------

Message: 3
Date: Fri, 15 Jun 2012 09:12:40 -0400
From: David Goulet <david.goulet@polymtl.ca>
To: Francis Giraldeau <francis.giraldeau at gmail.com>
Cc: "lttng-dev at lists.lttng.org" <lttng-dev at lists.lttng.org>
Subject: Re: [lttng-dev] lttng - ubuntu 11.10 - problem
Message-ID: <4FDB34C8.7000505 at polymtl.ca>
Content-Type: text/plain; charset=ISO-8859-1

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

In order to trace the kernel, you need the LTTng kernel modules available in
the package "lttng-modules-dkms". So make sure you have these three packages
installed:

# sudo apt-get install lttng-tools lttng-modules-dkms babeltrace

The error message you got indicates that there is simply no LTTng modules
loaded. Please make sure they are loaded and if the problem persist, let us know!

Thanks!
David

On 15/06/12 04:16 AM, Francis Giraldeau wrote:
> Le 2012-06-15 09:41, somanath sahoo a ?crit :
>> Hi,
>> 
>> As i am new to lttng usage, I have followed the instructions from 
>> <https://launchpad.net/~lttng/+archive/ppa> in order to install the lttng
>> tool set in my ubuntu 11.10. After successful installation, i followed
>> the getting started link on lttng.org <http://lttng.org/quickstart> in
>> "root mode".
> 
> You may verify if kernel modules are loaded correctly. If not, then there
> may be a problem while the installation.
> 
> lsmod | grep lttng
> 
> If not, you may try to load them and see if any error message occurs:
> 
> sudo modprobe lttng_tracer
> 
> Francis
> 
> 
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^ permalink raw reply	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2012-06-18 14:35 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-06-15  7:41 [lttng-dev] lttng - ubuntu 11.10 - problem somanath sahoo
2012-06-15  8:16 ` Francis Giraldeau
2012-06-15  8:23   ` [lttng-dev] Prerequsites for adding perf context Oestman, Fredrik
2012-06-15 15:13     ` Mathieu Desnoyers
2012-06-15 13:12   ` [lttng-dev] lttng - ubuntu 11.10 - problem David Goulet
2012-06-15 13:51     ` Matthew Khouzam
2012-06-15 15:12     ` Mathieu Desnoyers
2012-06-15 15:32       ` Alexandre Montplaisir
2012-06-18  6:59 somanath sahoo
2012-06-18 13:42 ` Mathieu Desnoyers
2012-06-18 14:35   ` Alexandre Montplaisir

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