[LITMUS^RT] Using feather trace

Hiroyuki Chishiro chishiro at cs.unc.edu
Wed Sep 11 01:50:46 CEST 2013


Hi Gbadebo,

Please disable "CONFIG_RELOCATABLE" in "Processor type and features" from
your config.
Because "config FEATHER_TRACE" depends on "!RELOCATABLE" in litmus/Kconfig.

- Hiro



On Wed, Sep 11, 2013 at 8:18 AM, Glenn Elliott <gelliott at cs.unc.edu> wrote:

> Hi Gbadebo,
>
> Are you applying the patch to a vanilla Linux kernel, or are you cloning
> Litmus directly from a litmus-rt repository?  I ask because
> CONFIG_FEATHER_TRACE works just fine in the Litmus code I cloned from
> github.
>
> Do "git clone git://github.com/LITMUS-RT/litmus-rt.git" to clone the
> latest version of Litmus.
>
> That said, FEATHER_TRACE still appears in the litmus-et-2013.1.patch file,
> so I don't know why anything would be broken.  Do you see the line "config
> FEATHER_TRACE" in litmus/Kconfig?
>
> -Glenn
>
>
> On Sep 10, 2013, at 6:44 PM, ayoade gbadebo <gbaduz at gmail.com> wrote:
>
> using ftcat gives me no such file as /dev/litmus/ft_trace gives error
> could not open feather trace device(/dev/litmus/ft_trace).
> Where can I enable feather trace as it is not showing in .config file for
> kernel compilation after applying litmus-rt-2013.1.patch<http://www.litmus-rt.org/releases/2013.1/litmus-rt-2013.1.patch>
> ?
>
>
> On Tue, Sep 10, 2013 at 5:11 PM, ayoade gbadebo <gbaduz at gmail.com> wrote:
>
>> Hi,
>> the config parameter for *CONFIG_FEATHER_TRACE=y*
>> *is not showing in the .config file for the patch *
>>
>>    - litmus-rt-2013.1.patch<http://www.litmus-rt.org/releases/2013.1/litmus-rt-2013.1.patch>
>>    .
>>
>>    I have the parameter for trace but I cant enable for feather trace.
>>    Is there anything I am missing out?
>>
>>    Gbadebo
>>
>>
>>
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-- 

Hiroyuki Chishiro

Visiting Scholar

Department of Computer Science

The University of North Carolina at Chapel Hill
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