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bug fix

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This commit is contained in:
Ruipeng Li 2021-05-25 15:47:05 -07:00
parent dfceea17d6
commit 57d1288bda
1 changed files with 16 additions and 6 deletions
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22
src/docs/usr-manual/ch-misc.rst
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@ -191,7 +191,7 @@ need to be set properly, which can be also set by
When configured with ``--with-cuda`` or ``--with-device-openmp``, the memory allocated on the GPUs, by default, is the GPU device memory, which is not accessible from the CPUs.
Hypre's structured solvers can work fine with device memory,
whereas only selected unstructured solvers can run with device memory. (see [Running on GPUs](https://github.com/hypre-space/hypre/wiki) for details).
whereas only selected unstructured solvers can run with device memory. See [Running on GPUs](https://github.com/hypre-space/hypre/wiki) for details.
In general, BoomerAMG and the SStruct
require unified (CUDA managed) memory, for which
the following option should be added
@ -223,17 +223,27 @@ The other NVIDIA GPU related options include:
* ``--enable-curand`` Use random numbers generators on GPUs (default is YES)
Allocations and deallocations of GPU memory are expensive. Memory pooling is a common approach to reduce such overhead and improve performance.
hypre provides caching allocators for GPU device memory and unified memory, and also the support for Umpire [Umpire]_.
To enable GPU memory pool, include only one of the following options:
hypre provides caching allocators for GPU device memory and unified memory,
enabled by
.. code-block:: none
--enable-device-memory-pool Enable the caching GPU memory allocator in hypre (default is NO)
--with-umpire --with-umpire-include=/path-of-umpire-install/include
--enable-device-memory-pool Enable the caching GPU memory allocator in hypre
(default is NO)
hypre also supports Umpire [Umpire]_. To enable Umpire pool, include the following options:
.. code-block:: none
--with-umpire Use Umpire Allocator for device and unified memory
(default is NO)
--with-umpire-include=/path-of-umpire-install/include
--with-umpire-lib-dirs=/path-of-umpire-install/lib
--with-umpire-libs=umpire Use Umpire Allocator for device and unified memory (default is NO)
--with-umpire-libs=umpire
For running on AMD GPUs, configure with
.. code-block:: none
--with-hip Use HIP for AMD GPUs. (default is NO)