Test BatchedEinsumPytatoPyOpenCLArrayContext

test/test_batched_einsum_actx.py

@@ -0,0 +1,217 @@
+import pytest
+
+
+try:
+    import feinsum  # noqa: F401
+except ModuleNotFoundError:
+    pytest.skip(reason="BatchedEinsumActx imposes feinsum as a hard dep.",
+                allow_module_level=True)
+
+try:
+    from loopy import get_kennedy_unweighted_fusion_candidates  # noqa: F401
+    from loopy import rename_inames_in_batch  # noqa: F401
+except ImportError:
+    pytest.skip(reason="BatchedEinsumActx imposes loop-fusion support in "
+                "loopy as a hard dep.", allow_module_level=True)
+
+import numpy as np
+
+from pytools.tag import UniqueTag
+
+from arraycontext import (
+    BatchedEinsumPytatoPyOpenCLArrayContext, PyOpenCLArrayContext,
+    PytatoPyOpenCLArrayContext, tag_axes)
+from arraycontext.pytest import (
+    _PytestEagerJaxArrayContextFactory, _PytestPyOpenCLArrayContextFactoryWithClass,
+    _PytestPytatoJaxArrayContextFactory, _PytestPytatoPyOpenCLArrayContextFactory,
+    _PytestSplitPytatoPyOpenCLArrayContextFactory,
+    pytest_generate_tests_for_array_contexts)
+
+
+# {{{ axes tag types for image processing
+
+class ImageDimensionTag(UniqueTag):
+    """
+    An abstract tag type that is tagged to an array's axis indexing along an image's
+    axis.
+    """
+
+
+class XDimension(ImageDimensionTag):
+    """
+    A tag that is attached to a :class:`pytato.array.Axis` that indexes along the
+    x-dimension of an image.
+    """
+
+
+class YDimension(ImageDimensionTag):
+    """
+    A tag that is attached to a :class:`pytato.array.Axis` that indexes along the
+    y-dimension of an image.
+    """
+
+
+class ChannelDimension(ImageDimensionTag):
+    """
+    A tag that is attached to a :class:`pytato.array.Axis` that indexes along the
+    channels of an image.
+    """
+
+# }}}
+
+
+# {{{ array context fixture
+
+class ImageProcessingFusionPytatoPyOpenCLArrayContextForImageProc(
+        BatchedEinsumPytatoPyOpenCLArrayContext):
+    def __init__(self, queue, allocator=None):
+        super().__init__(queue, allocator,
+                         fallback_to_no_fusion=False,
+                         loop_fusion_axis_tag_t=ImageDimensionTag)
+
+
+class _PyOpenCLArrayContextForTests(PyOpenCLArrayContext):
+    """Like :class:`PyOpenCLArrayContext`, but applies no program transformations
+    whatsoever. Only to be used for testing internal to :mod:`arraycontext`.
+    """
+
+    def transform_loopy_program(self, t_unit):
+        return t_unit
+
+
+class _PytatoPyOpenCLArrayContextForTests(PytatoPyOpenCLArrayContext):
+    """Like :class:`PytatoPyOpenCLArrayContext`, but applies no program
+    transformations whatsoever. Only to be used for testing internal to
+    :mod:`arraycontext`.
+    """
+
+    def transform_loopy_program(self, t_unit):
+        return t_unit
+
+
+class _PytatoPyOpenCLArrayContextForTestsFactory(
+        _PytestPytatoPyOpenCLArrayContextFactory):
+    actx_class = _PytatoPyOpenCLArrayContextForTests
+
+
+class _PyOpenCLArrayContextForTestsFactoryWithHostScalars(
+        _PytestPyOpenCLArrayContextFactoryWithClass):
+    force_device_scalars = True
+    actx_class = _PyOpenCLArrayContextForTests
+
+
+class _PytestBatchedEinsumPytatoPyOpenCLArrayContextFactory(
+        _PytestPytatoPyOpenCLArrayContextFactory):
+    @property
+    def actx_class(self):
+        return ImageProcessingFusionPytatoPyOpenCLArrayContextForImageProc
+
+
+pytest_generate_tests = pytest_generate_tests_for_array_contexts([
+    _PyOpenCLArrayContextForTestsFactoryWithHostScalars,
+    _PytatoPyOpenCLArrayContextForTestsFactory,
+    _PytestEagerJaxArrayContextFactory,
+    _PytestPytatoJaxArrayContextFactory,
+    _PytestSplitPytatoPyOpenCLArrayContextFactory,
+    _PytestBatchedEinsumPytatoPyOpenCLArrayContextFactory,
+    ])
+
+# }}}
+
+
+def test_simple_add(actx_factory):
+    # Lesson 01 of Halide Tutorial
+    actx = actx_factory()
+
+    rng = np.random.default_rng(0)
+    a_np = rng.random((800, 600))
+    b_np = rng.random((800, 600))
+    a = actx.from_numpy(a_np)
+    b = actx.from_numpy(b_np)
+
+    a = tag_axes(actx, {0: XDimension(), 1: YDimension()}, a)
+    b = tag_axes(actx, {0: XDimension(), 1: YDimension()}, b)
+
+    out = actx.to_numpy(a + b)
+    ref_out = a_np + b_np
+
+    np.testing.assert_allclose(out, ref_out)
+
+
+def test_brighten_image(actx_factory):
+    # Lesson 02 of Halide Tutorial
+    actx = actx_factory()
+
+    rng = np.random.default_rng(0)
+
+    img_np = 255*rng.random((800, 600, 3), dtype=np.float32)
+
+    img = actx.from_numpy(img_np)
+    img = tag_axes(actx,
+                   {0: XDimension(), 1: YDimension(), 2: ChannelDimension()},
+                   img)
+
+    brightened_img = 1.5*img
+    clamped_brightened_img = actx.np.minimum(brightened_img, np.float32(255))
+
+    out = actx.to_numpy(clamped_brightened_img)
+    ref_out = np.minimum(1.5*img_np, np.float32(255))
+
+    np.testing.assert_allclose(out, ref_out)
+
+
+def test_simple_einsum(actx_factory):
+    actx = actx_factory()
+
+    rng = np.random.default_rng()
+
+    a_np = rng.random((10, 4))
+    a = actx.from_numpy(a_np)
+    a = tag_axes(actx,
+                 {0: XDimension(), 1: YDimension()}, a)
+
+    out1 = actx.einsum("ij,ij->i", a, a+1)
+    out2 = actx.einsum("ij,ij->i", 2*a, 3*a+7)
+
+    ref_out = (np.einsum("ij,ij->i", a_np, a_np + 1)
+               + np.einsum("ij,ij->i", 2*a_np, 3*a_np+7))
+    out = actx.to_numpy(out1 + out2)
+
+    np.testing.assert_allclose(ref_out, out)
+
+
+def test_nested_einsum(actx_factory):
+    actx = actx_factory()
+
+    rng = np.random.default_rng()
+
+    a_np = rng.random((10, 4))
+
+    # {{{ compute out
+
+    a = actx.from_numpy(a_np)
+    a = tag_axes(actx,
+                 {0: XDimension(), 1: YDimension()}, a)
+    b = a + 1
+
+    out1 = actx.einsum("ij,ij->i", a, b)
+    out2 = actx.einsum("ij,ij->i", 2*a, 3*a+7)
+    out3 = actx.einsum("ij,i->i", 3*b, 2*out1)
+
+    out = actx.to_numpy(out1 + out2 + out3)
+
+    # }}}
+
+    # {{{ compute ref_out
+
+    b_np = a_np + 1
+    out1_np = np.einsum("ij,ij->i", a_np, a_np+1)
+    out2_np = np.einsum("ij,ij->i", 2*a_np, 3*a_np+7)
+    out3_np = np.einsum("ij,i->i", 3*b_np, 2*out1_np)
+    ref_out = out1_np + out2_np + out3_np
+
+    # }}}
+
+    np.testing.assert_allclose(ref_out, out)
+
+# vim: fdm=marker