Environment Variables for Multi-EP
This feature is supported for the
release_mt
and
debug_mt
library configurations only. To specify the configuration, run the following command:
$ source <
install-dir
>/bin/vars.sh release_mtI_MPI_THREAD_SPLIT
Syntax
I_MPI_THREAD_SPLIT=
<value>
Arguments
Value | Binary Indicator
|
0 | no | off | disable | Disable the
MPI_THREAD_SPLIT model support. This is the default value.
|
1 | yes | on | enable | Enable the
MPI_THREAD_SPLIT model support.
|
Description
Use this environment variable to control the
I_MPI_THREAD_SPLIT
programming model.
I_MPI_THREAD_RUNTIME
Syntax
I_MPI_THREAD_RUNTIME=
<value>
Arguments
Value | Thread Runtime
|
generic | Enable runtime support (for example, pthreads, TBB). This is the default value if OpenMP* cannot be detected at runtime.
|
openmp | Enable OpenMP runtime support. This is the default value if OpenMP is detected at runtime.
|
Description
Use this environment variable to control threading runtime support.
I_MPI_THREAD_SPLIT
model support is enabled.
I_MPI_THREAD_MAX
Syntax
I_MPI_THREAD_MAX=<
int
>
Arguments
< int > | The maximum number of threads per rank. The default value is
omp_get_max_threads() if
I_MPI_THREAD_RUNTIME is set to
openmp . The value is 1 otherwise
|
Description
Use this environment variable to set the maximum number of threads to be used in each process concurrently.
I_MPI_THREAD_ID_KEY
Syntax
I_MPI_THREAD_ID_KEY=
<string>
Arguments
< string > | Define the MPI info object key. The default value is
thread_id |
Description
Use this environment variable to set the MPI info object key that is used to explicitly define the logical thread number
thread_id
.