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Initialize NUMBA_DEFAULT_NUM_THREADS with a batch scheduler aware value #7088

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Merged
sklam merged 3 commits into from
Jun 14, 2021
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Initialize NUMBA_DEFAULT_NUM_THREADS with a batch scheduler aware value #7088

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e95a5fd
use os.sched_getaffinity when available
t20100 Jun 7, 2021
54f06b1
update documentation
t20100 Jun 7, 2021
8414de7
Update docs/source/user/threading-layer.rst
t20100 Jun 10, 2021
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update documentation
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@t20100
t20100 committed Jun 7, 2021
commit 54f06b173cc60a2c8b11de23114ebcfa9536fe07
8 changes: 4 additions & 4 deletions docs/source/user/threading-layer.rst
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Expand Up @@ -268,10 +268,10 @@ API Reference

.. py:data:: numba.config.NUMBA_DEFAULT_NUM_THREADS

The number of CPU cores on the system (as determined by
``multiprocessing.cpu_count()``). This is the default value for
:obj:`numba.config.NUMBA_NUM_THREADS` unless the
:envvar:`NUMBA_NUM_THREADS` environment variable is set.
The number of usable CPU cores on the system (as determined by either
``len(os.sched_getaffinity(0))`` or ``multiprocessing.cpu_count()``).
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This is the default value for :obj:`numba.config.NUMBA_NUM_THREADS` unless
the :envvar:`NUMBA_NUM_THREADS` environment variable is set.

.. autofunction:: numba.set_num_threads

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