On Tue, Sep 20, 2011 at 10:25 AM, rohan puri <rohan.puri15@xxxxxxxxx> wrote: > > > On Tue, Sep 20, 2011 at 10:13 AM, Amit Nagal <helloin.amit@xxxxxxxxx> wrote: >> >> On Tue, Sep 20, 2011 at 10:05 AM, rohan puri <rohan.puri15@xxxxxxxxx> >> wrote: >> > >> > >> > On Tue, Sep 20, 2011 at 9:44 AM, Amit Nagal <helloin.amit@xxxxxxxxx> >> > 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 > Ok , thanks for the link . i will try the same . Regards Amit Nagal _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
