| | 1 | == Speeding up your code == |
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| | 3 | First you should try to get an idea which routines are consuming most of your CPU time: |
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| | 5 | * Use the "-p" option together with your usual compiler flags. |
| | 6 | * Recompile the whole code. |
| | 7 | * Run the code with a sample job card. This will generate an additional file called "gmon.out". |
| | 8 | * After the succesful run, just execute "gprof main.x gmon.out" which gives you the amount of consumed CPU time per subroutines. |
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| | 11 | Now the hard part starts : Reducing the run time of the main consumers... |
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