profiling functions called in interrupt context

[Amit Nagal]

On Tue, Sep 20, 2011 at 10:05 AM, rohan puri <rohan.puri15 at gmail.com> wrote:
>
>
> On Tue, Sep 20, 2011 at 9:44 AM, Amit Nagal <helloin.amit at gmail.com> wrote:
>>
>> Hi ,
>>
>> i want to measure time spend in a callback function called from
>> interrupt context .
>> since the time spend will be in us / ns , what kernel apis can i use
>> to measure it ?
>>
>> also since i want to use it in interrupt context  , kernel time
>> measurement apis should not sleep .
>> i am using embedded arm target , and tools like OProfile  are not
>> available .
>>
>> can i be guided which  kernel time measurement apis shall i use to
>> measure time in a interrupt callback ?
>>
>> Regards
>> Amit Nagal
>
> For this you can make use of ftrace.
>
> Refer link http://www.mjmwired.net/kernel/Documentation/trace/ftrace.txt
>
> Regards,
> Rohan
>

Tools like ftrace are not available to me in my embedded arm target .
So i want to use kernel apis to deal with time measurement in
interrupt context .

Regards
Amit Nagal