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f090074d86
In some environments this appears to import the config module rather than the config object.
126 lines
4.1 KiB
Python
126 lines
4.1 KiB
Python
# Copyright 2023 The JAX Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import contextlib
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import io
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import logging
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import platform
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import subprocess
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import sys
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import textwrap
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import unittest
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import jax
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import jax._src.test_util as jtu
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from jax._src import xla_bridge
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# Note: importing absltest causes an extra absl root log handler to be
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# registered, which causes extra debug log messages. We don't expect users to
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# import absl logging, so it should only affect this test. We need to use
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# absltest.main and config.parse_flags_with_absl() in order for jax_test flag
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# parsing to work correctly with bazel (otherwise we could avoid importing
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# absltest/absl logging altogether).
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from absl.testing import absltest
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jax.config.parse_flags_with_absl()
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@contextlib.contextmanager
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def capture_jax_logs():
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log_output = io.StringIO()
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handler = logging.StreamHandler(log_output)
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logger = logging.getLogger("jax")
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logger.addHandler(handler)
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try:
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yield log_output
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finally:
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logger.removeHandler(handler)
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class LoggingTest(jtu.JaxTestCase):
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@unittest.skipIf(platform.system() == "Windows",
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"Subprocess test doesn't work on Windows")
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def test_no_log_spam(self):
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if jtu.is_cloud_tpu() and xla_bridge._backends:
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raise self.skipTest(
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"test requires fresh process on Cloud TPU because only one process "
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"can use the TPU at a time")
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if sys.executable is None:
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raise self.skipTest("test requires access to python binary")
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program = textwrap.dedent("""
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import jax
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jax.device_count()
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f = jax.jit(lambda x: x + 1)
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f(1)
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f(2)
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jax.numpy.add(1, 1)
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""")
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python = sys.executable
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assert "python" in python
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# Make sure C++ logging is at default level for the test process.
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proc = subprocess.run([python, "-c", program], capture_output=True,
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env={"TF_CPP_MIN_LOG_LEVEL": "1"})
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lines = proc.stdout.split(b"\n")
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lines.extend(proc.stderr.split(b"\n"))
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allowlist = [
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b"",
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b"An NVIDIA GPU may be present on this machine, but a CUDA-enabled "
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b"jaxlib is not installed. Falling back to cpu.",
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]
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lines = [l for l in lines if l not in allowlist]
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self.assertEmpty(lines)
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def test_debug_logging(self):
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# Warmup so we don't get "No GPU/TPU" warning later.
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jax.jit(lambda x: x + 1)(1)
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# Nothing logged by default (except warning messages, which we don't expect
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# here).
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with capture_jax_logs() as log_output:
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jax.jit(lambda x: x + 1)(1)
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self.assertEmpty(log_output.getvalue())
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# Turn on all debug logging.
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jax.config.update("jax_debug_log_modules", "jax")
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with capture_jax_logs() as log_output:
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jax.jit(lambda x: x + 1)(1)
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self.assertIn("Finished tracing + transforming", log_output.getvalue())
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self.assertIn("Compiling <lambda>", log_output.getvalue())
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# Turn off all debug logging.
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jax.config.update("jax_debug_log_modules", None)
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with capture_jax_logs() as log_output:
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jax.jit(lambda x: x + 1)(1)
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self.assertEmpty(log_output.getvalue())
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# Turn on one module.
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jax.config.update("jax_debug_log_modules", "jax._src.dispatch")
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with capture_jax_logs() as log_output:
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jax.jit(lambda x: x + 1)(1)
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self.assertIn("Finished tracing + transforming", log_output.getvalue())
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self.assertNotIn("Compiling <lambda>", log_output.getvalue())
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# Turn everything off again.
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jax.config.update("jax_debug_log_modules", None)
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with capture_jax_logs() as log_output:
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jax.jit(lambda x: x + 1)(1)
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self.assertEmpty(log_output.getvalue())
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if __name__ == "__main__":
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absltest.main(testLoader=jtu.JaxTestLoader())
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