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Merge Pull Request #11936 from ndellingwood/Trilinos/issue-11930
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PR Title: Documentation: update erroneous cmake options
PR Author: ndellingwood
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trilinos-autotester authored May 31, 2023
2 parents 38ebbbf + 88766a8 commit f0132f0
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14 changes: 7 additions & 7 deletions RELEASE_NOTES
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Expand Up @@ -919,20 +919,20 @@ Tpetra
2. Otherwise, if you're building with OpenMP, Tpetra uses OpenMP by
default.
3. Otherwise, if Kokkos enables the Serial execution space (if
Kokkos_ENABLE_Serial is ON), Tpetra uses Serial by default.
Kokkos_ENABLE_SERIAL is ON), Tpetra uses Serial by default.
4. Otherwise, if Kokkos enables the Threads execution space (if
Kokkos_ENABLE_Pthread is ON), Tpetra uses Threads by default.
Kokkos_ENABLE_THREADS is ON), Tpetra uses Threads by default.

If you wish to enable other Node types, you may set the following
CMake options. You do NOT need to set any of these options explicitly
if the Node type would be enabled by default anyway.

- Tpetra_INST_CUDA (Kokkos_ENABLE_Cuda must be ON, and Trilinos must
- Tpetra_INST_CUDA (Kokkos_ENABLE_CUDA must be ON, and Trilinos must
be built with CUDA; ON by default if building with CUDA)
- Tpetra_INST_OPENMP (Kokkos_ENABLE_OpenMP must be ON, and Trilinos
- Tpetra_INST_OPENMP (Kokkos_ENABLE_OPENMP must be ON, and Trilinos
must be built with OpenMP support)
- Tpetra_INST_PTHREAD (Kokkos_ENABLE_Pthread must be ON)
- Tpetra_INST_SERIAL (Kokkos_ENABLE_Serial must be ON)
- Tpetra_INST_PTHREAD (Kokkos_ENABLE_THREADS must be ON)
- Tpetra_INST_SERIAL (Kokkos_ENABLE_SERIAL must be ON)

While it is legal to enable both the OpenMP and Pthreads back-ends in
the same executable, it is a bad idea. Both back-ends spawn their own
Expand Down Expand Up @@ -1893,7 +1893,7 @@ Tpetra
# Disable KokkosClassic::TPINode
-D KokkosClassic_ENABLE_ThreadPool:BOOL=OFF
# Shut off Kokkos' Pthreads back-end in favor of OpenMP
-D Kokkos_ENABLE_Pthread:BOOL=OFF
-D Kokkos_ENABLE_THREADS:BOOL=OFF

You must also enable the following subpackages explicitly, since they
are not Primary Tested at the moment:
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4 changes: 2 additions & 2 deletions packages/tpetra/core/example/BlockCrs/README.md
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Expand Up @@ -31,8 +31,8 @@ cmake \
-D Trilinos_ENABLE_Tpetra:BOOL=ON \
-D Kokkos_ENABLE_CXX11_DISPATCH_LAMBDA:BOOL=ON \
-D Kokkos_ENABLE_OPENMP:BOOL=${USE_OPENMP} \
-D Kokkos_ENABLE_Cuda_UVM:BOOL=${USE_CUDA} \
-D Kokkos_ENABLE_Cuda_Lambda:BOOL=${USE_CUDA} \
-D Kokkos_ENABLE_CUDA_UVM:BOOL=${USE_CUDA} \
-D Kokkos_ENABLE_CUDA_LAMBDA:BOOL=${USE_CUDA} \
-D KOKKOS_ARCH=${ARCH_FLAG} \
-D TPL_ENABLE_MPI:BOOL=ON \
-D TPL_ENABLE_BLAS:BOOL=ON \
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2 changes: 1 addition & 1 deletion packages/tpetra/core/guide/src/Obtaining/Building.rst
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Expand Up @@ -123,5 +123,5 @@ The best option for building Tpetra is to enable the execution space type at the

- Enabling CUDA (by using NVCC and ``nvcc_wrapper``) makes CUDA Tpetra's default execution space.
- Enabling OpenMP (``Trilinos_ENABLE_OpenMP:BOOL=ON``), but not enabling CUDA, makes OpenMP Tpetra's default execution space.
- The Pthreads (``Kokkos::Threads``) back-end is a special case; it does not get enabled by default. This avoids surprises, because Trilinos enables its Pthreads TPL by default as long as it can detect it. Users may set the CMake option ``Kokkos_ENABLE_Pthread:BOOL=ON`` to enable use of Pthreads in Tpetra, and to make it default.
- The Pthreads (``Kokkos::Threads``) back-end is a special case; it does not get enabled by default. This avoids surprises, because Trilinos enables its Pthreads TPL by default as long as it can detect it. Users may set the CMake option ``Kokkos_ENABLE_THREADS:BOOL=ON`` to enable use of Pthreads in Tpetra, and to make it default.

8 changes: 4 additions & 4 deletions packages/tpetra/doc/FAQ.txt
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Expand Up @@ -122,8 +122,8 @@ variables that you would normally set:
#+BEGIN_EXAMPLE
-D TPL_ENABLE_MPI:BOOL=ON
-D TPL_ENABLE_CUDA:BOOL=ON
-D Kokkos_ENABLE_Cuda_UVM:BOOL=ON
-D Kokkos_ENABLE_Cuda_Lambda:BOOL=ON
-D Kokkos_ENABLE_CUDA_UVM:BOOL=ON
-D Kokkos_ENABLE_CUDA_LAMBDA:BOOL=ON
#+END_EXAMPLE

If you already define ~CMAKE_CXX_FLAGS~ yourself, just make sure that
Expand Down Expand Up @@ -198,8 +198,8 @@ do the following:
that the CMake variable ~TPL_ENABLE_Pthread~ is ~ON~. If not,
you may need to tell Trilinos where to find the Pthreads library
and header file.
2. Enable Kokkos' Pthreads support, by setting
~Kokkos_ENABLE_Pthread:BOOL=OFF~.
2. Enable Kokkos' Threads support, by setting
~Kokkos_ENABLE_THREADS:BOOL=OFF~.
3. Enable Tpetra's Pthreads support, by setting
~Tpetra_INST_PTHREAD:BOOL=OFF~.
4. Make Tpetra use Pthreads by default, by setting
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4 changes: 2 additions & 2 deletions packages/zoltan2/test/core/temp/XpetraEpetraMatrix.cpp
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@@ -1,6 +1,6 @@
// Program to debug segfaults being reported in CDASH when
// -D Kokkos_ENABLE_Pthreadi:BOOL=ON
// -D Tpetra_INST_PTHREAD:BOOL=ON
// -D Kokkos_ENABLE_THREADS:BOOL=ON
// -D Tpetra_INST_PTHREAD:BOOL=ON
// Problem appears to be in creation of Xpetra::EpetraCrsMatrixT

#include <Teuchos_RCP.hpp>
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