On Tue, Sep 20, 2011 at 9:44 AM, Amit Nagal <helloin.amit@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
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Hi Amit, For this you can make use of ftrace. Refer link http://www.mjmwired.net/kernel/Documentation/trace/ftrace.txt Regards, Rohan