diff options
Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/multiprocessing.rst | 9 | ||||
| -rw-r--r-- | Doc/library/os.rst | 5 |
2 files changed, 12 insertions, 2 deletions
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst index 8703f8f..e74430d 100644 --- a/Doc/library/multiprocessing.rst +++ b/Doc/library/multiprocessing.rst @@ -869,8 +869,13 @@ Miscellaneous .. function:: cpu_count() - Return the number of CPUs in the system. May raise - :exc:`NotImplementedError`. + Return the number of CPUs in the system. + + This number is not equivalent to the number of CPUs the current process can + use. The number of usable CPUs can be obtained with + ``len(os.sched_getaffinity(0))`` + + May raise :exc:`NotImplementedError`. .. seealso:: :func:`os.cpu_count` diff --git a/Doc/library/os.rst b/Doc/library/os.rst index 16e5019..0acb8a5 100644 --- a/Doc/library/os.rst +++ b/Doc/library/os.rst @@ -3596,6 +3596,11 @@ Miscellaneous System Information Return the number of CPUs in the system. Returns None if undetermined. + This number is not equivalent to the number of CPUs the current process can + use. The number of usable CPUs can be obtained with + ``len(os.sched_getaffinity(0))`` + + .. versionadded:: 3.4 |