[ltt-dev] Using LTTng on DA8xx Target

[Pierre-Marc Fournier]

saumya agarwal wrote:
> Following exes are present in /usr/bin
> ltrace
> ltt-unload
> lttd
> lttv-gui
> ltt-load
> lttctl
> lttv
> lttv.real
> 
> Does that means I don't have to install LTTng patches, or get LLT
> control tools on target?
> Only thing I need is to install LTTV on host?

Exactly.

> 
> --Saumya
> 
> On 11/12/08, Mathieu Desnoyers <compudj at krystal.dyndns.org> wrote:
>> If you already have a kernel with the LTTng patches applied, it probably
>> comes from your distro. You should have a look at your distro-specific
>> documentation to see if they provide some info about the specific LTTng
>> version they use.  But yes, all the pointers Pierre-Marc told you about
>> should help you getting started.
>>
>> Mathieu
>>
>> * saumya agarwal (cmks2002 at gmail.com) wrote:
>>> Thanks Marc, this info should get me started.
>>>
>>> My host linux machine has a different kernel version (2.6.9), so do I
>>> need LTTV compatible with host or target?
>>> In DA8xx kernel sources, I see a folder named LTT which has some
>>> source files like ltt-control.c, ltt-core.c etc, so does that mean
>>> that LTT control tools are already available in the kernel?
>>>
>>> --Saumya
>>>
>>>
>>> On 11/12/08, Pierre-Marc Fournier <pierre-marc.fournier at polymtl.ca> wrote:
>>>> Hello Saumya,
>>>>
>>>> saumya agarwal wrote:
>>>>> I am using a DA8xx Primus EVM and I want to use LTTng to trace the
>>>>> system. The  kernel supports LTTng.
>>>>> This is the first time I'll am working on it.
>>>>>
>>>>> I downloaded TraceToolkit-0.9.5 and untared it.
>>>>> The patched I am getting are:
>>>>> patch-ltt-linux-2.4.16-rthal5f-020415-1.14
>>>>> patch-ltt-linux-2.4.16-s390-020422-1.14
>>>>> patch-ltt-linux-2.4.16-vanilla-020415-1.14
>>>>> patch-ltt-linux-2.5.7-vanilla-020415-1.14
>>>>> patch-ltt-rtai-24.1.8-020317-1.14
>>>>>
>>>> Hmm, I don't know where you got this patch, but it is several years old.
>>>> Please see the site http://ltt.polymtl.ca
>>>> Have a look at the Compatibility list ("LTTng+LTTV versions
>>>> compatibility" link) to see what you need for a 2.6.18 kernel. You
>>>> probably need LTTng 0.6.41, ltt-control 0.30 and LTTV (the viewer)
>>>> 0.8.72. You will also find the quickstart guide there which will help
>>>> get you started.
>>>>
>>>> Note that since 2.6.18 is an old kernel. A lot of things changed since
>>>> that time and the quickstart guide that is on the site now will not be
>>>> in sync with this old version. I would recommend fetching the old guide
>>>> from the svn repository.
>>>>
>>>>> But the linux kernel version for DA8xx is 2.6.18.
>>>>> So can I use any of these patches?
>>>> No, you need a much newer version of LTTng that was designed for 2.6.18.
>>>>
>>>>> One more doubt I had was, that we use this tool from host or on
>>>>> target? Do I need a linux host machine, apply patches to its kernel,
>>>>> and reboot it and then start using it OR I need to apply patches to my
>>>>> DA8xx kernel and then start tracing on target itself?
>>>> You install the patches on the target kernel. You also need the
>>>> ltt-control tools on the target to control the tracing. You need to have
>>>> enough disk space on the target to record the trace. Work on streaming
>>>> is under way. Once you have the trace, you transfer it to the host and
>>>> inspect it with LTTV.
>>>>
>>>>> I am kind of confused about its usage.
>>>>> Could any one help me out with the exact procedure for using LTTng and
>>>>> patches version (website) from where I can get required packages?
>>>> Look at ltt.polymtl.ca and the quickstart guide.
>>>>
>>>> pmf
>>>>
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>>>
>> --
>> Mathieu Desnoyers
>> OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
>>