Merge pull request #8471 from niboshi/ignore-cupy-performance-warning

Ignore `cupy.util.PerformanceWarning` in pytest

chainer/backends/cuda.py

@@ -65,6 +65,9 @@
     from cupy.cuda import Event  # type: ignore # NOQA
     from cupy.cuda import Stream  # type: ignore # NOQA
 
+    # Alias for ignoring the warning in setup.cfg
+    from cupy.util import PerformanceWarning as _PerformanceWarning  # NOQA
+
     available = True
 except Exception as e:
     _resolution_error = e
@@ -107,6 +110,10 @@ class Stream(object):  # type: ignore # for type testing
     # for `xp is chainer.backends.cuda.cupy` to always work
     cupy = object()
 
+    # Dummy class for ignoring cupy.util.PerformanceWarning in setup.cfg.
+    class _PerformanceWarning(Warning):
+        pass
+
 
 if available:
     _cudnn_disabled_by_user = int(os.environ.get('CHAINER_CUDNN', '1')) == 0

setup.cfg

@@ -22,6 +22,7 @@ filterwarnings =
     ignore:ChainerX core binary is built in debug mode:UserWarning
     ignore:Accelerate has been detected as a NumPy backend library:UserWarning:chainer[.*]
     ignore::chainer.warnings.PerformanceWarning
+    ignore::chainer.backends.cuda._PerformanceWarning
     ignore::FutureWarning:chainer\.utils\.experimental
     # NumPy<1.11
     ignore:in the future np\.array_split will retain the shape of arrays with a zero size:FutureWarning:numpy\.lib\.shape_base