On Tue, Sep 20, 2011 at 10:13 AM, Amit Nagal <[email protected]> wrote:
> On Tue, Sep 20, 2011 at 10:05 AM, rohan puri <[email protected]> > wrote: > > > > > > 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 > > > > 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 > Hi Amit, I think ftrace can be enabled and used on arm arch. Please Refer http://www.omappedia.org/wiki/Installing_and_Using_Ftrace Regards, Rohan
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