profiling functions called in interrupt context
helloin.amit at gmail.com
Tue Sep 20 00:43:04 EDT 2011
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 ?
>> Amit Nagal
> For this you can make use of ftrace.
> Refer link http://www.mjmwired.net/kernel/Documentation/trace/ftrace.txt
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 .
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