On Tue, Sep 20, 2011 at 10:05 AM, rohan puri [off-list ref] wrote:

On Tue, Sep 20, 2011 at 9:44 AM, Amit Nagal [off-list ref] wrote:

quoted

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