[lttng-dev] problem starting trace on arm target

[David Goulet]

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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
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