reimplementation of gpu_count

Author: mauriliogenovese

Diff for: nipype/pipeline/plugins/multiproc.py

@@ -21,7 +21,7 @@
 from ...utils.profiler import get_system_total_memory_gb
 from ..engine import MapNode
 from .base import DistributedPluginBase
-from .tools import gpu_count
+from ...utils.gpu_count import gpu_count
 
 try:
     from textwrap import indent

Diff for: nipype/pipeline/plugins/tools.py

@@ -175,13 +175,3 @@ def create_pyscript(node, updatehash=False, store_exception=True):
     with open(pyscript, "w") as fp:
         fp.writelines(cmdstr)
     return pyscript
-
-
-def gpu_count():
-    n_gpus = 1
-    try:
-        import GPUtil
-    except ImportError:
-        return 1
-    else:
-        return len(GPUtil.getGPUs())

Diff for: nipype/utils/gpu_count.py

@@ -0,0 +1,55 @@
+# -*- DISCLAIMER: this file contains code derived from gputil (https://github.com/anderskm/gputil)
+# and therefore is distributed under to the following license:
+#
+# MIT License
+#
+# Copyright (c) 2017 anderskm
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import platform
+import shutil
+from subprocess import Popen, PIPE
+import os
+
+
+def gpu_count():
+    try:
+        if platform.system() == "Windows":
+            nvidia_smi = shutil.which('nvidia-smi')
+            if nvidia_smi is None:
+                nvidia_smi = (
+                    "%s\\Program Files\\NVIDIA Corporation\\NVSMI\\nvidia-smi.exe"
+                    % os.environ['systemdrive']
+                )
+        else:
+            nvidia_smi = "nvidia-smi"
+
+        p = Popen(
+            [nvidia_smi, "--query-gpu=name", "--format=csv,noheader,nounits"],
+            stdout=PIPE,
+        )
+        stdout, stderror = p.communicate()
+
+        output = stdout.decode('UTF-8')
+        lines = output.split(os.linesep)
+        num_devices = len(lines) - 1
+        return num_devices
+    except:
+        return 0