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[Pytest] Sort unit tests before running. #9188

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Oct 14, 2021
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By default, pytest will sort tests to maximize the re-use of fixtures. However, this assumes that all fixtures have an equal cost to
generate, and no caches outside of those managed by pytest. A fixture for a tvm.testing.parameter is effectively free, while a fixture maintaining a cache of reference data tvm.testing.utils._fixture_cache be quite large.

Since most of the TVM fixtures are specific to a python function, sort the test ordering by python function, so that tvm.testing.utils._fixture_cache can be cleared sooner rather than later.

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thanks @Lunderberg ! this makes sense to me.

@Lunderberg Lunderberg force-pushed the pytest_sort branch 3 times, most recently from 41f8a48 to 85c3abe Compare October 7, 2021 13:23
By default, pytest will sort tests to maximize the re-use of fixtures.
However, this assumes that all fixtures have an equal cost to
generate, and no caches outside of those managed by pytest.  A fixture
for a `tvm.testing.parameter` is effectively free, while a fixture
maintaining a cache of reference data
`tvm.testing.utils._fixture_cache` be quite large.

Since most of the TVM fixtures are specific to a python function, sort
the test ordering by python function, so that
tvm.testing.utils._fixture_cache can be cleared sooner rather than
later.
When sorting the tests, the order of parametrizations may change.
Therefore, the tests checking for automatic target parametrization
shouldn't depend on order.
@Lunderberg
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Rebased on main, because it looks like the CI is stalling out a bit on vulkan+topi tests that were unintentionally enabled in #9093, then intentionally disabled in #9219.

@areusch areusch merged commit 523eb12 into apache:main Oct 14, 2021
masahi pushed a commit to Laurawly/tvm-1 that referenced this pull request Oct 14, 2021
* [Pytest] Sort unit tests before running.

By default, pytest will sort tests to maximize the re-use of fixtures.
However, this assumes that all fixtures have an equal cost to
generate, and no caches outside of those managed by pytest.  A fixture
for a `tvm.testing.parameter` is effectively free, while a fixture
maintaining a cache of reference data
`tvm.testing.utils._fixture_cache` be quite large.

Since most of the TVM fixtures are specific to a python function, sort
the test ordering by python function, so that
tvm.testing.utils._fixture_cache can be cleared sooner rather than
later.

* Updated TestTargetAutoParametrization

When sorting the tests, the order of parametrizations may change.
Therefore, the tests checking for automatic target parametrization
shouldn't depend on order.
@Lunderberg Lunderberg deleted the pytest_sort branch October 14, 2021 13:07
Lunderberg added a commit to Lunderberg/tvm that referenced this pull request Oct 22, 2021
A follow-up from apache#9188.  The
`item.location` tuple contains `(filename, line_number, test_name)`,
where the `test_name` includes a string representation of all
parameters.  This change preserves pytest's sorting of parametrized
values within a parametrized test, rather than sorting by strings.
Lunderberg added a commit to Lunderberg/tvm that referenced this pull request Oct 22, 2021
A follow-up from apache#9188.  The
`item.location` tuple contains `(filename, line_number, test_name)`,
where the `test_name` includes a string representation of all
parameters.  This change preserves pytest's sorting of parametrized
values within a parametrized test, rather than sorting by strings.
masahi pushed a commit that referenced this pull request Oct 26, 2021
A follow-up from #9188.  The
`item.location` tuple contains `(filename, line_number, test_name)`,
where the `test_name` includes a string representation of all
parameters.  This change preserves pytest's sorting of parametrized
values within a parametrized test, rather than sorting by strings.
ylc pushed a commit to ylc/tvm that referenced this pull request Jan 7, 2022
* [Pytest] Sort unit tests before running.

By default, pytest will sort tests to maximize the re-use of fixtures.
However, this assumes that all fixtures have an equal cost to
generate, and no caches outside of those managed by pytest.  A fixture
for a `tvm.testing.parameter` is effectively free, while a fixture
maintaining a cache of reference data
`tvm.testing.utils._fixture_cache` be quite large.

Since most of the TVM fixtures are specific to a python function, sort
the test ordering by python function, so that
tvm.testing.utils._fixture_cache can be cleared sooner rather than
later.

* Updated TestTargetAutoParametrization

When sorting the tests, the order of parametrizations may change.
Therefore, the tests checking for automatic target parametrization
shouldn't depend on order.
ylc pushed a commit to ylc/tvm that referenced this pull request Jan 7, 2022
A follow-up from apache#9188.  The
`item.location` tuple contains `(filename, line_number, test_name)`,
where the `test_name` includes a string representation of all
parameters.  This change preserves pytest's sorting of parametrized
values within a parametrized test, rather than sorting by strings.
ylc pushed a commit to ylc/tvm that referenced this pull request Jan 13, 2022
* [Pytest] Sort unit tests before running.

By default, pytest will sort tests to maximize the re-use of fixtures.
However, this assumes that all fixtures have an equal cost to
generate, and no caches outside of those managed by pytest.  A fixture
for a `tvm.testing.parameter` is effectively free, while a fixture
maintaining a cache of reference data
`tvm.testing.utils._fixture_cache` be quite large.

Since most of the TVM fixtures are specific to a python function, sort
the test ordering by python function, so that
tvm.testing.utils._fixture_cache can be cleared sooner rather than
later.

* Updated TestTargetAutoParametrization

When sorting the tests, the order of parametrizations may change.
Therefore, the tests checking for automatic target parametrization
shouldn't depend on order.
ylc pushed a commit to ylc/tvm that referenced this pull request Jan 13, 2022
A follow-up from apache#9188.  The
`item.location` tuple contains `(filename, line_number, test_name)`,
where the `test_name` includes a string representation of all
parameters.  This change preserves pytest's sorting of parametrized
values within a parametrized test, rather than sorting by strings.
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2 participants