[lttng-dev] not able to read 32-bit app traces running on a 64-bit system with relayd

[Jérémie Galarneau]

Hi Anand,

Would you mind testing this fix (based on master)?
https://github.com/jgalar/lttng-tools/tree/consumerd_comm_fix

Regards,
Jérémie

On Wed, Dec 3, 2014 at 5:58 PM, Jérémie Galarneau
<jeremie.galarneau at efficios.com> wrote:
> On Tue, Dec 2, 2014 at 1:10 PM, Anand Neeli <anand.neeli at gmail.com> wrote:
>> Hi Jérémie,
>> Thanks for verifying this.
>>
>> Is this a issue with relayd? or babeltrace?
>> Coz i see this only with 32-bit applications running on a 64-bit system,
>> along with relay of traces using relayd
>
> It's caused by a bug in the communication between the session and
> consumer daemons of different bitness.
> I'm working on a fix which will be back-ported to 2.4, 2.5 and 2.6.
>
> I'll keep you posted as soon as it is available.
>
> Regards,
> Jérémie
>
>>
>> Thanks,
>> Anand Neeli
>>
>> On Tue, Dec 2, 2014 at 11:03 PM, Jérémie Galarneau
>> <jeremie.galarneau at efficios.com> wrote:
>>>
>>> On Tue, Dec 2, 2014 at 8:01 AM, Anand Neeli <anand.neeli at gmail.com> wrote:
>>> > Hi All,
>>> > I have verified that i'm able to read the attached 32-bit and 64-bit
>>> > traces
>>> > using eclipse trace compass.
>>> > Where as babeltrace fails to read 32-bit traces.
>>> > Can anyone please let me know what could be the issue here.
>>> >
>>>
>>> Deleting the index folder of the 32 bit trace seems to make it
>>> possible for babeltrace to read the trace... Reproducible on
>>> Babeltrace master.
>>>
>>> Would you mind opening a bug report against Babeltrace on bugs.lttng.org?
>>>
>>> Thanks,
>>> Jérémie
>>>
>>> > Thanks,
>>> > Anand Neeli
>>> >
>>> > ---------- Forwarded message ----------
>>> > From: Anand Neeli <anand.neeli at gmail.com>
>>> > Date: Thu, Nov 27, 2014 at 5:01 PM
>>> > Subject: not able to read 32-bit app traces running on a 64-bit system
>>> > with
>>> > relayd
>>> > To: "lttng-dev at lists.lttng.org" <lttng-dev at lists.lttng.org>
>>> >
>>> >
>>> > Hi All,
>>> > I'm running both 32-bit and 64-bit app's on a 64-bit system.  I have
>>> > consumerd's build for both 32-bit and 64-bits (followed
>>> > http://lttng.org/docs/#doc-instrumenting-32-bit-app-on-64-bit-system)
>>> >
>>> > I'm seeing problem in reading 32-bit app traces, although it is logging
>>> > something and logfile size in lttng-traces/ is increasing.
>>> > I have compiled same app for 64-bit and it works fine.
>>> >
>>> > One more point here is that, this happens only when relaying traces.
>>> > Without
>>> > using relayd and by using local tracing i dont see any issues.
>>> >
>>> > Attached are the logs from 32-bit and 64-bit app's. There sizes are same
>>> > except the files in index/
>>> >
>>> > I'm using 2.4.1 lttng and tried 1.2.0 and 1.2.1 version of babeltrace.
>>> >
>>> > Can anyone please tell me how can i avoid this problem.
>>> >
>>> > Thanks,
>>> > Anand Neeli
>>> >
>>> >
>>> > _______________________________________________
>>> > lttng-dev mailing list
>>> > lttng-dev at lists.lttng.org
>>> > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>>> >
>>>
>>>
>>>
>>> --
>>> Jérémie Galarneau
>>> EfficiOS Inc.
>>> http://www.efficios.com
>>
>>
>
>
>
> --
> Jérémie Galarneau
> EfficiOS Inc.
> http://www.efficios.com



-- 
Jérémie Galarneau
EfficiOS Inc.
http://www.efficios.com