Coverage for tests/test_threads.py: 28%

26 statements  

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1# This file is part of utils. 

2# 

3# Developed for the LSST Data Management System. 

4# This product includes software developed by the LSST Project 

5# (https://www.lsst.org). 

6# See the COPYRIGHT file at the top-level directory of this distribution 

7# for details of code ownership. 

8# 

9# This program is free software: you can redistribute it and/or modify 

10# it under the terms of the GNU General Public License as published by 

11# the Free Software Foundation, either version 3 of the License, or 

12# (at your option) any later version. 

13# 

14# This program is distributed in the hope that it will be useful, 

15# but WITHOUT ANY WARRANTY; without even the implied warranty of 

16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

17# GNU General Public License for more details. 

18# 

19# You should have received a copy of the GNU General Public License 

20# along with this program. If not, see <https://www.gnu.org/licenses/>. 

21 

22import os 

23import unittest 

24 

25from lsst.utils.threads import disable_implicit_threading, set_thread_envvars 

26 

27try: 

28 import numexpr 

29except ImportError: 

30 numexpr = None 

31try: 

32 import threadpoolctl 

33except ImportError: 

34 threadpoolctl = None 

35 

36 

37class ThreadsTestCase(unittest.TestCase): 

38 """Tests for threads.""" 

39 

40 def testDisable(self): 

41 set_thread_envvars(2, override=True) 

42 self.assertEqual(os.environ["OMP_NUM_THREADS"], "2") 

43 set_thread_envvars(3, override=False) 

44 self.assertEqual(os.environ["OMP_NUM_THREADS"], "2") 

45 

46 disable_implicit_threading() 

47 self.assertEqual(os.environ["OMP_NUM_THREADS"], "1") 

48 self.assertEqual(os.environ["OMP_PROC_BIND"], "false") 

49 

50 # Check that we have only one thread. 

51 if numexpr: 

52 self.assertEqual(numexpr.utils.get_num_threads(), 1) 

53 if threadpoolctl: 

54 info = threadpoolctl.threadpool_info() 

55 for api in info: 

56 self.assertEqual(api["num_threads"], 1, f"API: {api}") 

57 

58 

59if __name__ == "__main__": 

60 unittest.main()