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How to easily measure Floating Point Operations Per Second (FLOPS) | B. Nikolic Software and Computing Blog

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The hard way of measuring FLOPS is to modify your program so that it itself keeps track of the number of floating operations performed in each module/function, run it on your target hardware and finally divide the two numbers. But, this requires possibly extensive modification to the program, and if it is done at too granular a level (i.e., in too tight a loop) it can affect the performance of the program.

The hard way of measuring FLOPS is to modify your program so that it itself keeps track of the number of floating operations performed in each module/function, run it on your target hardware and finally divide the two numbers. But, this requires possibly extensive modification to the program, and if it is done at too granular a level (i.e., in too tight a loop) it can affect the performance of the program. A much easier way of measuring FLOPS for a particular combination of program and hardware is to use the CPU performance counters, now very conveniently accessible under Linux using the perf

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