[siegelj@voyager solidcode]$ mpirun -np 4 pirulesfaster


Which rule do you want to use?
 0= done 
 1=rectangular rule 
 2=mid point rule
 3=simpsons rule (choose intervals/process(or)s to be even)
 
2

Please input the number of intervals(0 quits).

10000000
wall clock begin = 0.659643

pi is approximately 3.1415938060603050, Relative Error is   3.66842757e-05
wall clock time = 0.073868

[siegelj@voyager solidcode]$ mpirun -np 4 pirules
Process number 0 on processor voyager.umsl.edu 

Which rule do you want to use?
 0= done 
 1=rectangular rule 
 2=mid point rule
 3=simpsons rule 

2

Please input the number of intervals(0 quits).
10000000

pi is approximately 3.1415926535897607, Relative Error is  -1.03191330e-12
wall clock time = 0.163891


[siegelj@voyager solidcode]$ mpicc -O3 -o pirules pirules.c
[siegelj@voyager solidcode]$ mpicc -O3 -o pirulesfaster pirulesfaster.c
[siegelj@voyager solidcode]$ mpirun -np 4 pirules

Please input the number of intervals(0 quits).
10000000

pi is approximately 3.1415926535897607, Relative Error is  -1.03191330e-12
wall clock time = 0.119298


[siegelj@voyager solidcode]$ mpirun -np 4 pirulesfaster


Please input the number of intervals(0 quits).
 
10000000

pi is approximately 3.1415938060603383, Relative Error is   3.66842768e-05
wall clock time = 0.037276