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how good is gprof ?

7 New Member
hi all ,
i want to find out how accurate is the result of gprof ? i want to find the optimized version of my program takes how much time and unoptimized takes how mch? i have tried gettimeofday(), clock() and other such functions ...but i was not getting proper consistent answer always ....
also my code is quite small so that i want to trace its runtime which is in microseconds hence i need some way to measure its exectuion time at very finer level ....pl pl help
Sep 14 '07 #1
1 2055
JosAH
11,448 Recognized Expert MVP
hi all ,
i want to find out how accurate is the result of gprof ? i want to find the optimized version of my program takes how much time and unoptimized takes how mch? i have tried gettimeofday(), clock() and other such functions ...but i was not getting proper consistent answer always ....
also my code is quite small so that i want to trace its runtime which is in microseconds hence i need some way to measure its exectuion time at very finer level ....pl pl help
If you're running this all on a PC don't be surprised about the clock granularity:
just 1/100s or worse. That's all; the rest is just averaging and fondling and it's
not gprofs fault; windows takes care of that.

kind regards,

Jos
Sep 19 '07 #2

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