Don't explicitly map MPI rank to GPU

ecmwf-ifs · Sep 16, 2024 · 08d3afd · 08d3afd
1 parent 2772a60
commit 08d3afd
Show file tree

Hide file tree

Showing 4 changed files with 0 additions and 38 deletions.
diff --git a/README.md b/README.md
@@ -241,8 +241,6 @@ Running
 -------
 No extra run-time options are needed to run the GPU enabled ecWam. Please note that this means that if ecWam is built
 using the `--with-loki` and `--with-acc` bundle arguments, it will necessarily be offloaded for GPU execution.
-For multi-GPU runs, the number of GPUs maps to the number of MPI ranks. Thus multiple GPUs can be requested by
-launching with multiple MPI ranks. The mapping of MPI ranks to GPUs assumes at most 4 GPUs per host node.
 
 Environment variables
 ---------------------

diff --git a/src/ecwam/CMakeLists.txt b/src/ecwam/CMakeLists.txt
@@ -269,7 +269,6 @@ list( APPEND ecwam_srcs
   w_mode_st.F90
   w_pdf.F90
   w_pmax.F90
-  wam_init_gpu_mod.F90
   wam_multio_mod.F90
   wam_nproma.F90
   wam_sorti.F90

diff --git a/src/ecwam/wam_init_gpu_mod.F90 b/src/ecwam/wam_init_gpu_mod.F90
diff --git a/src/ecwam/wvwaminit.F90 b/src/ecwam/wvwaminit.F90
@@ -47,7 +47,6 @@ SUBROUTINE WVWAMINIT (LLCOUPLED, IULOG, LLRNL,                    &
 
       USE MPL_MODULE, ONLY : MPL_MYRANK, MPL_NPROC
       USE YOMHOOK  , ONLY : LHOOK,   DR_HOOK, JPHOOK
-      USE WAM_INIT_GPU_MOD, ONLY : WAM_INIT_GPU
 
 ! ----------------------------------------------------------------------
       IMPLICIT NONE
@@ -89,10 +88,6 @@ SUBROUTINE WVWAMINIT (LLCOUPLED, IULOG, LLRNL,                    &
       IRANK = MPL_MYRANK()
       NPROC = MPL_NPROC()
 
-#if defined(WAM_GPU)
-      CALL WAM_INIT_GPU(IRANK)
-#endif
-
 !     STANDARD OUTPUT UNIT
 !     --------------------