| |
| c--------------------------------------------------------------------- |
| c--------------------------------------------------------------------- |
| |
| subroutine read_input |
| |
| c--------------------------------------------------------------------- |
| c--------------------------------------------------------------------- |
| |
| implicit none |
| |
| include 'applu.incl' |
| |
| integer fstatus |
| !$ integer omp_get_max_threads |
| !$ external omp_get_max_threads |
| |
| |
| c--------------------------------------------------------------------- |
| c if input file does not exist, it uses defaults |
| c ipr = 1 for detailed progress output |
| c inorm = how often the norm is printed (once every inorm iterations) |
| c itmax = number of pseudo time steps |
| c dt = time step |
| c omega 1 over-relaxation factor for SSOR |
| c tolrsd = steady state residual tolerance levels |
| c nx, ny, nz = number of grid points in x, y, z directions |
| c--------------------------------------------------------------------- |
| |
| write(*, 1000) |
| |
| open (unit=3,file='inputlu.data',status='old', |
| > access='sequential',form='formatted', iostat=fstatus) |
| if (fstatus .eq. 0) then |
| |
| write(*, *) 'Reading from input file inputlu.data' |
| |
| read (3,*) |
| read (3,*) |
| read (3,*) ipr, inorm |
| read (3,*) |
| read (3,*) |
| read (3,*) itmax |
| read (3,*) |
| read (3,*) |
| read (3,*) dt |
| read (3,*) |
| read (3,*) |
| read (3,*) omega |
| read (3,*) |
| read (3,*) |
| read (3,*) tolrsd(1),tolrsd(2),tolrsd(3),tolrsd(4),tolrsd(5) |
| read (3,*) |
| read (3,*) |
| read (3,*) nx0, ny0, nz0 |
| close(3) |
| else |
| ipr = ipr_default |
| inorm = inorm_default |
| itmax = itmax_default |
| dt = dt_default |
| omega = omega_default |
| tolrsd(1) = tolrsd1_def |
| tolrsd(2) = tolrsd2_def |
| tolrsd(3) = tolrsd3_def |
| tolrsd(4) = tolrsd4_def |
| tolrsd(5) = tolrsd5_def |
| nx0 = isiz1 |
| ny0 = isiz2 |
| nz0 = isiz3 |
| endif |
| |
| c--------------------------------------------------------------------- |
| c check problem size |
| c--------------------------------------------------------------------- |
| |
| if ( ( nx0 .lt. 4 ) .or. |
| > ( ny0 .lt. 4 ) .or. |
| > ( nz0 .lt. 4 ) ) then |
| |
| write (*,2001) |
| 2001 format (5x,'PROBLEM SIZE IS TOO SMALL - ', |
| > /5x,'SET EACH OF NX, NY AND NZ AT LEAST EQUAL TO 5') |
| stop |
| |
| end if |
| |
| if ( ( nx0 .gt. isiz1 ) .or. |
| > ( ny0 .gt. isiz2 ) .or. |
| > ( nz0 .gt. isiz3 ) ) then |
| |
| write (*,2002) |
| 2002 format (5x,'PROBLEM SIZE IS TOO LARGE - ', |
| > /5x,'NX, NY AND NZ SHOULD BE EQUAL TO ', |
| > /5x,'ISIZ1, ISIZ2 AND ISIZ3 RESPECTIVELY') |
| stop |
| |
| end if |
| |
| |
| write(*, 1001) nx0, ny0, nz0 |
| write(*, 1002) itmax |
| !$ write(*, 1003) omp_get_max_threads() |
| write(*, *) |
| |
| |
| 1000 format(//,' NAS Parallel Benchmarks (NPB3.3-OMP)', |
| > ' - LU Benchmark', /) |
| 1001 format(' Size: ', i4, 'x', i4, 'x', i4) |
| 1002 format(' Iterations: ', i5) |
| 1003 format(' Number of available threads: ', i5) |
| |
| |
| |
| return |
| end |
| |
| |
