How Can I count the flops of my code using VTune?

yuali · ‎06-27-2003

Thank you!! ................Urgent needed!!

bnshah · ‎07-01-2003

What processor are you trying to do this on?

yuali · ‎07-03-2003

I am sorry. I think I have made a mistake. I need to count the floating point operation in my code. I have a PC with Pentium III and a PC with Pentium IV. Thanks!

bnshah · ‎07-07-2003

On the Pentium 4 you can use the event x87 Instructions Retired. On the PIII you can use the event FP Operations Retired. However these will not give you a true meaning of FLOPs since they do not count floating point calculations using the SSE and SSE2 instructions (Pentium 4 only). Generally when calculating FLOPs you looking at you algorithm at a high level and see how many floating point operations there are per iteration. Than you multiply that by the total interations and divide by the execution time.

yuali · ‎07-23-2003

Thank you so much! I only need the number of floating point operations in my code. So I needn't divide by the excutive time, right?

bnshah · ‎08-05-2003

Correct