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[TESTS] Refactor tests to run on either the GPU or CPU. (apache#6331)
Much of the time spent in testing is duplicated work between CPU and GPU test nodes. The main reason is that there is no way to control which TVM devices are enabled at runtime, so tests that use LLVM will run on both GPU and CPU nodes. This patch adds an environment variable, TVM_TEST_DEVICES, which controls which TVM devices should be used by tests. Devices not in TVM_TEST_DEVICES can still be used, so tests must be careful to check that the desired device is enabled with `tvm.testing.device_enabled` or by enumerating all devices with `tvm.testing.enabled_devices`. All tests have been retrofitted with these checks. This patch also provides the decorator `@tvm.testing.gpu` to mark a test as possibly using the gpu. Tests that require the gpu can use `@tvm.testing.requires_gpu`. Tests without these flags will not be run on GPU nodes.
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# Licensed to the Apache Software Foundation (ASF) under one | ||
# or more contributor license agreements. See the NOTICE file | ||
# distributed with this work for additional information | ||
# regarding copyright ownership. The ASF licenses this file | ||
# to you under the Apache License, Version 2.0 (the | ||
# "License"); you may not use this file except in compliance | ||
# with the License. You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, | ||
# software distributed under the License is distributed on an | ||
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
# KIND, either express or implied. See the License for the | ||
# specific language governing permissions and limitations | ||
# under the License. | ||
import tvm.testing | ||
from pytest import ExitCode | ||
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def pytest_configure(config): | ||
print("enabled targets:", "; ".join(map(lambda x: x[0], tvm.testing.enabled_targets()))) | ||
print("pytest marker:", config.option.markexpr) | ||
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def pytest_sessionfinish(session, exitstatus): | ||
# Don't exit with an error if we select a subset of tests that doesn't | ||
# include anything | ||
if session.config.option.markexpr != '': | ||
if exitstatus == ExitCode.NO_TESTS_COLLECTED: | ||
session.exitstatus = ExitCode.OK |
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