Hello All, I have written a C program that basically read value from ADC , I am reading ADC data in loop and process the data. Reading 1000 times it takes 1 min of time with default freq(405 Mhz), however If i changes the freq. from 405 Mhz to 500 Mhz, execution time decrease 55 sec (measure using time command) but actual time is same as 1 min(measure using stop watch). why? why I am not getting difference in actual time, after increasing freq, actual time measure using stop watch and system time must be same. but I am getting difference in time. Can someone please explain, what causes problem over here..., where else I need to change in kernel, I am using 2.6.32 kernel. Thank You for your time and consideration regards, freqclock