Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/tensorflow/python/framework/gpu_util.py: 55%

1# Copyright 2019 The TensorFlow Authors. All Rights Reserved. 

2# 

3# Licensed under the Apache License, Version 2.0 (the "License"); 

4# you may not use this file except in compliance with the License. 

5# You may obtain a copy of the License at 

6# 

7# http://www.apache.org/licenses/LICENSE-2.0 

8# 

9# Unless required by applicable law or agreed to in writing, software 

10# distributed under the License is distributed on an "AS IS" BASIS, 

11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

12# See the License for the specific language governing permissions and 

13# limitations under the License. 

14# ============================================================================== 

15"""Contains GPU utility functions.""" 

16 

17import collections 

18import re 

19 

20 

21# Matches the DeviceAttributes.physical_device_desc field. 

22_PHYSICAL_DEVICE_DESCRIPTION_REGEX = re.compile( 

23 r'name: ([^,]*), (?:.*compute capability: (\d+)\.(\d+))?') 

24 

25 

26# compute_capability is a (major version, minor version) pair, or None if this 

27# is not an Nvidia GPU. 

28GpuInfo = collections.namedtuple('gpu_info', ['name', 'compute_capability']) 

29 

30 

31def compute_capability_from_device_desc(device_attrs): 

32 """Returns the GpuInfo given a DeviceAttributes proto. 

33 

34 Args: 

35 device_attrs: A DeviceAttributes proto. 

36 

37 Returns 

38 A gpu_info tuple. Both fields are None if `device_attrs` does not have a 

39 valid physical_device_desc field. 

40 """ 

41 # TODO(jingyue): The device description generator has to be in sync with 

42 # this file. Another option is to put compute capability in 

43 # DeviceAttributes, but I avoided that to keep DeviceAttributes 

44 # target-independent. Reconsider this option when we have more things like 

45 # this to keep in sync. 

46 # LINT.IfChange 

47 match = _PHYSICAL_DEVICE_DESCRIPTION_REGEX.search( 

48 device_attrs.physical_device_desc) 

49 # LINT.ThenChange(//tensorflow/core/common_runtime/gpu/gpu_device.cc) 

50 if not match: 

51 return GpuInfo(None, None) 

52 cc = (int(match.group(2)), int(match.group(3))) if match.group(2) else None 

53 return GpuInfo(match.group(1), cc)