CPU time
 

Hi guys,

Is there any simple way to find out the CPU time used for a code in FORTRAN. I just forgot the command. Your help is appreciated.

Re: CPU time
 

At the Unix prompt, enter:

time yourprog

Manosh

Re: CPU time
 

In Fortran directly,

REAL time_begin, time_end

... CALL CPU_TIME(time_begin)

... CALL CPU_TIME(time_end)

Re: CPU time
 

Thanks but none did work! Do I have to use the library?

I am writing my code on Unix computer.

Re: CPU time
 

Are you using Fortran 90/95? Both of the methods work for my Fortran 90/95 code without linking to any library, however, if you direct your running results to some file, then the first method doesn't work.

Re: CPU time
 

Thanks a lot.

What about function ETIME

In the manual it says it should give the CPU time, what I get is very very small values!

Re: CPU time
 

This is a code snippet from my Windows Fortran90 program, if it's of any help...

use portlib

real elapsed_time

elapsed_time=timef() !start processor timer

... program stuff...

elapsed_time=timef() !stop processor timer

write(*,*) 'execution time: (sec)', elapsed_time

end program

Re: CPU time
 

Thank you very much!