Hi All, i have board that contains MPC8555 processor with linux 2.6.27 ported to it. i want to use an accurate function to measure the time. i searched the kernel code & i found several functions but i read that the do_gettimeofday is the most accurate one since it has a timer resolution of usec.
my question is how this function give this accuracy while the kernel timer is 4msec? is this a real accuracy or does it convert from msec to usec? or does it depend on another timer counter that has this resolution? or may b it measure the clock cycles of the processor within certain interval? Note that the freq of the processor is 850MHz. Unfortunately, the function is implemented in assembly & i cant understand it? so can u tell me how this accurate numbers can be got or they r just fake numbers? thanks -- View this message in context: http://www.nabble.com/is-the-resolution-of-do_gettimeofday-in-usec--tp23807779p23807779.html Sent from the linuxppc-dev mailing list archive at Nabble.com. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
