On Tue, Sep 20, 2011 at 9:44 AM, Amit Nagal <[email protected]> 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 > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > Hi Amit, For this you can make use of ftrace. Refer link http://www.mjmwired.net/kernel/Documentation/trace/ftrace.txt Regards, Rohan
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