[lttng-dev] problem starting trace on arm target

[Fahad Usman]

Hi David,
Thanks for the help. lttng-consumerd binary was actually not present
at that path. I have placed it and now its working I can start tracing
without any problems. Actually I was using  open embedded
(www.openembedded.org) framework to build lttng and other stuff.
lttng-consumerd binary is now moved to a path that's not very common,
I had to add a rule to explicitly include consumerd into the file
system.

The memory related problems still occur randomly, I am trying to find
a definitive way to reproduce it

thanks for your support and sorry for making noise about something
that was not actually a problem with lttng
--
Fahad


On Thu, May 10, 2012 at 7:43 PM, David Goulet <david.goulet at polymtl.ca> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi Fahad,
>
> So, it seems you don't have a consumer installed on your system that the
> sessiond can access:
>
> DEBUG3: Looking for a kernel consumer at these locations: [in
> spawn_consumerd() at main.c:1678]
> DEBUG3:         1)  [in spawn_consumerd() at main.c:1679]
> DEBUG3:         2) /usr/lib/lttng/libexec/lttng-consumerd [in
> spawn_consumerd() at main.c:1680]
> DEBUG3:         3) /usr/lib/lttng/libexec/lttng-consumerd [in
> spawn_consumerd() at main.c:1681]
> PERROR: kernel start consumer exec: No such file or directory [in
> spawn_consumerd() at main.c:1795]
>
> Also I'm starting to believe that you might have a memory limit problem since
> you are hitting this:
>
> PERROR: sendmsg: Bad file descriptor [in lttcomm_send_unix_sock() at
> sessiond-comm.c:310]
> PERROR: send consumer channel: Bad file descriptor [in
> send_kconsumer_session_streams() at main.c:636]
> PERROR: ioctl start session: No buffer space available [in
> kernel_start_session() at kernel.c:397]
>
> Because of that, the kernel start session command on the tracer fails... Can
> you validate that you have enough memory during the commands ?
>
> Moving the lttng-consumerd at the right location will at least help a bit :)
>
> Thanks!
> David
>
> On 09/05/12 11:30 AM, Fahad Usman wrote:
>> Hi David, here are the logs on the two terminals, Term1:
>> http://pastebin.com/dYGCrGcb Term2: http://pastebin.com/4XCn4Asv
>>
>> Please let me know if you want any other info from me.
>>
>> -- Fahad
>>
>>
>> On Wed, May 9, 2012 at 6:08 PM, David Goulet <dgoulet at efficios.com> wrote:
>> Hi Fahad,
>>
>> This is error is a bit peculiar...
>>
>> Can you provide the full log of the session daemon like so.
>>
>> (term1) # lttng-sessiond -vvv
>>
>> (term2) the rest of the commands adding -vvv to "lttng" command line.
>>
>> Thanks! David
>>
>> On 09/05/12 08:20 AM, Fahad Usman wrote:
>>>>> Hi, I am trying to use lttng-modules on an arm target, but when I try
>>>>> to start tracing I get some errors like PERROR: sendmsg: Bad file
>>>>> descriptor [in lttcomm_send_unix_sock() at sessiond-comm.c:310]
>>>>> PERROR: send consumer channel: Bad file descriptor [in
>>>>> send_kconsumer_session_streams() at main.c:636] please see pastebin
>>>>> (http://pastebin.com/ivnvQWa2) for complete logs
>>>>>
>>>>> I am using Linux 2.6.38 on Freescale imx6 platform. Lttng-modules
>>>>> 2.0.2 and lttng-tools 2.0.1
>>>>>
>>>>> -- Fahad
>>>>>
>>>>> _______________________________________________ lttng-dev mailing
>>>>> list lttng-dev at lists.lttng.org
>>>>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>>
>> _______________________________________________ lttng-dev mailing list
>> lttng-dev at lists.lttng.org
>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.12 (GNU/Linux)
>
> iQEcBAEBAgAGBQJPq9QGAAoJEELoaioR9I02N0YH/17EdVFGWkhP+kqZJznvmv6/
> +MebU8HiguKhpqYVcGjS4xw9HAR2hn3oZGAiIQSjbaDO1rhI9xWzguj+dq2gi3B4
> 9yjk7c6mfKMs09yqMdoWkQOmCCmnlazYZpjE0iqQxMhUC84hoPB+sBZDWBfA9nOX
> UD/bNkNGZOk8+vaYN+twNeB/7iNdsgISeUwaZ/5GgfJ+lCp7YAY/QaF8EVyH3DP4
> upXlyhQZoSqogmtnFJxRbhTgio/P9Z9mxwc/k5GqKypBAqI9BcXvuxwgsg6rLNMW
> ixbGGzN/fPKn6lGW8Xv96YHFxTU1ZvC+TY06YFk3cV0amdOjkS8tOwZF/4A2K3g=
> =Zj2o
> -----END PGP SIGNATURE-----