Changeset 1257 for palm/trunk/SOURCE/diffusion_s.f90

Timestamp:

Nov 8, 2013 3:18:40 PM (10 years ago)

Author:

raasch

Message:

New:
---

openACC porting of timestep calculation
(modules, timestep, time_integration)

Changed:

---

openACC loop directives and vector clauses removed (because they do not give any performance improvement with PGI
compiler versions > 13.6)
(advec_ws, buoyancy, coriolis, diffusion_e, diffusion_s, diffusion_u, diffusion_v, diffusion_w, diffusivities, exchange_horiz, fft_xy, pres, production_e, transpose, tridia_solver, wall_fluxes)

openACC loop independent clauses added
(boundary_conds, prandtl_fluxes, pres)

openACC declare create statements moved after FORTRAN declaration statement
(diffusion_u, diffusion_v, diffusion_w, fft_xy, poisfft, production_e, tridia_solver)

openACC end parallel replaced by end parallel loop
(flow_statistics, pres)

openACC "kernels do" replaced by "kernels loop"
(prandtl_fluxes)

output format for theta* changed to avoid output of *
(run_control)

Errors:

---

bugfix for calculation of advective timestep (old version may cause wrong timesteps in case of
vertixcally stretched grids)
Attention: standard run-control output has changed!
(timestep)

File:

• palm/trunk/SOURCE/diffusion_s.f90 (modified) (5 diffs)

palm/trunk/SOURCE/diffusion_s.f90

@@ -20 +20 @@
 ! Current revisions:
 ! ------------------
-!
+! openacc loop and loop vector clauses removed
 !
 ! Former revisions:
@@ -229 +229 @@
        !$acc         present( s_flux_b, s_flux_t, tend, wall_s_flux )         &
        !$acc         present( wall_w_x, wall_w_y )
-       !$acc loop
        DO  i = i_left, i_right
           DO  j = j_south, j_north
 !
 !--          Compute horizontal diffusion
-             !$acc loop vector( 32 )
              DO  k = 1, nzt
                 IF ( k > nzb_s_outer(j,i) )  THEN
@@ -252 +250 @@
 !
 !--          Apply prescribed horizontal wall heatflux where necessary
-             !$acc loop vector(32)
              DO  k = 1, nzt
                 IF ( k > nzb_s_inner(j,i)  .AND.  k <= nzb_s_outer(j,i)  .AND. &
@@ -279 +276 @@
 !--          prescribed or computed at bottom and/or top, index k starts/ends at
 !--          nzb+2 or nzt-1, respectively.
-             !$acc loop vector( 32 )
              DO  k = 1, nzt_diff
                 IF ( k >= nzb_diff_s_inner(j,i) )  THEN
@@ -293 +289 @@
 !--          Vertical diffusion at the first computational gridpoint along
 !--          z-direction
-             !$acc loop vector( 32 )
              DO  k = 1, nzt
                 IF ( use_surface_fluxes  .AND.  k == nzb_s_inner(j,i)+1 )  THEN