clear repo: test 2.

gklearn/utils/unfinished/openblassettings.py

@@ -1,86 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""
-Created on Wed Dec 19 15:31:01 2018
-A script to set the thread number of OpenBLAS (if used). 
-Some modules (such as Numpy, Scipy, sklearn) using OpenBLAS perform parallel 
-computation automatically, which causes conflict when other paralleling modules 
-such as multiprossing.Pool, highly increase the computing time. By setting 
-thread to 1, OpenBLAS is forced to use single thread/CPU, thus this conflict 
-can be avoided.
--e.g:
-    with num_threads(8):
-    np.dot(x, y)
-@author: ali_m
-@Reference: `ali_m's answer <https://stackoverflow.com/a/29582987>`__, 2018.12
-"""
-
-import contextlib
-import ctypes
-from ctypes.util import find_library
-import os
-
-# Prioritize hand-compiled OpenBLAS library over version in /usr/lib/
-# from Ubuntu repos
-try_paths = ['/opt/OpenBLAS/lib/libopenblas.so',
-             '/lib/libopenblas.so',
-             '/usr/lib/libopenblas.so.0',
-             find_library('openblas')]
-openblas_lib = None
-for libpath in try_paths:
-    try:
-        openblas_lib = ctypes.cdll.LoadLibrary(libpath)
-        break
-    except OSError:
-        continue
-if openblas_lib is None:
-    raise EnvironmentError('Could not locate an OpenBLAS shared library', 2)
-
-
-def set_num_threads(n):
-    """Set the current number of threads used by the OpenBLAS server."""
-    openblas_lib.openblas_set_num_threads(int(n))
-
-
-# At the time of writing these symbols were very new:
-# https://github.com/xianyi/OpenBLAS/commit/65a847c
-try:
-    openblas_lib.openblas_get_num_threads()
-    def get_num_threads():
-        """Get the current number of threads used by the OpenBLAS server."""
-        return openblas_lib.openblas_get_num_threads()
-except AttributeError:
-    def get_num_threads():
-        """Dummy function (symbol not present in %s), returns -1."""
-        return -1
-    pass
-
-try:
-    len(os.sched_getaffinity(0))
-    def get_num_procs():
-        """Get the total number of physical processors"""
-        return len(os.sched_getaffinity(0))
-except AttributeError:
-    def get_num_procs():
-        """Dummy function (symbol not present), returns -1."""
-        return -1
-    pass
-
-
-@contextlib.contextmanager
-def num_threads(n):
-    """Temporarily changes the number of OpenBLAS threads.
-
-    Example usage:
-
-        print("Before: {}".format(get_num_threads()))
-        with num_threads(n):
-            print("In thread context: {}".format(get_num_threads()))
-        print("After: {}".format(get_num_threads()))
-    """
-    old_n = get_num_threads()
-    set_num_threads(n)
-    try:
-        yield
-    finally:
-        set_num_threads(old_n)