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bpo-36044: Reduce number of unit tests run for PGO build (GH-14702)
Reduce the number of unit tests run for the PGO generation task. This speeds up the task by a factor of about 15x. Running the full unit test suite is slow. This change may result in a slightly less optimized build since not as many code branches will be executed. If you are willing to wait for the much slower build, the old behavior can be restored using './configure [..] PROFILE_TASK="-m test --pgo-extended"'. We make no guarantees as to which PGO task set produces a faster build. Users who care should run their own relevant benchmarks as results can depend on the environment, workload, and compiler tool chain.
This commit is contained in:
Neil Schemenauer
GitHub
parent
d309352c6f
commit
4e16a4a311
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@ -264,7 +264,9 @@ def _create_parser():
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help='only write the name of test cases that will be run'
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' , don\'t execute them')
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group.add_argument('-P', '--pgo', dest='pgo', action='store_true',
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help='enable Profile Guided Optimization training')
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help='enable Profile Guided Optimization (PGO) training')
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group.add_argument('--pgo-extended', action='store_true',
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help='enable extended PGO training (slower training)')
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group.add_argument('--fail-env-changed', action='store_true',
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help='if a test file alters the environment, mark '
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'the test as failed')
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@ -344,6 +346,8 @@ def _parse_args(args, **kwargs):
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parser.error("-G/--failfast needs either -v or -W")
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if ns.pgo and (ns.verbose or ns.verbose2 or ns.verbose3):
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parser.error("--pgo/-v don't go together!")
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if ns.pgo_extended:
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ns.pgo = True # pgo_extended implies pgo
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if ns.nowindows:
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print("Warning: the --nowindows (-n) option is deprecated. "
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@ -17,6 +17,7 @@
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INTERRUPTED, CHILD_ERROR, TEST_DID_NOT_RUN,
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PROGRESS_MIN_TIME, format_test_result, is_failed)
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from test.libregrtest.setup import setup_tests
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from test.libregrtest.pgo import setup_pgo_tests
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from test.libregrtest.utils import removepy, count, format_duration, printlist
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from test import support
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@ -214,6 +215,9 @@ def find_tests(self, tests):
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removepy(self.tests)
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# add default PGO tests if no tests are specified
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setup_pgo_tests(self.ns)
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stdtests = STDTESTS[:]
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nottests = NOTTESTS.copy()
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if self.ns.exclude:
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52
Lib/test/libregrtest/pgo.py
Normal file
52
Lib/test/libregrtest/pgo.py
Normal file
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@ -0,0 +1,52 @@
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# Set of tests run by default if --pgo is specified. The tests below were
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# chosen based on the following criteria: either they exercise a commonly used
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# C extension module or type, or they run some relatively typical Python code.
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# Long running tests should be avoided because the PGO instrumented executable
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# runs slowly.
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PGO_TESTS = [
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'test_array',
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'test_base64',
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'test_binascii',
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'test_binop',
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'test_bisect',
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'test_bytes',
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'test_cmath',
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'test_codecs',
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'test_collections',
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'test_complex',
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'test_dataclasses',
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'test_datetime',
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'test_decimal',
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'test_difflib',
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'test_embed',
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'test_float',
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'test_fstring',
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'test_functools',
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'test_generators',
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'test_hashlib',
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'test_heapq',
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'test_int',
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'test_itertools',
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'test_json',
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'test_long',
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'test_math',
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'test_memoryview',
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'test_operator',
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'test_ordered_dict',
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'test_pickle',
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'test_pprint',
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'test_re',
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'test_set',
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'test_statistics',
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'test_struct',
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'test_tabnanny',
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'test_time',
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'test_unicode',
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'test_xml_etree',
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'test_xml_etree_c',
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]
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def setup_pgo_tests(ns):
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if not ns.args and not ns.pgo_extended:
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# run default set of tests for PGO training
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ns.args = PGO_TESTS[:]
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@ -255,9 +255,10 @@ TCLTK_INCLUDES= @TCLTK_INCLUDES@
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TCLTK_LIBS= @TCLTK_LIBS@
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# The task to run while instrumented when building the profile-opt target.
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# We exclude unittests with -x that take a rediculious amount of time to
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# run in the instrumented training build or do not provide much value.
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PROFILE_TASK=-m test.regrtest --pgo
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# To speed up profile generation, we don't run the full unit test suite
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# by default. The default is "-m test --pgo". To run more tests, use
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# PROFILE_TASK="-m test --pgo-extended"
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PROFILE_TASK= @PROFILE_TASK@
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# report files for gcov / lcov coverage report
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COVERAGE_INFO= $(abs_builddir)/coverage.info
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@ -0,0 +1,9 @@
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Reduce the number of unit tests run for the PGO generation task. This
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speeds up the task by a factor of about 15x. Running the full unit test
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suite is slow. This change may result in a slightly less optimized build
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since not as many code branches will be executed. If you are willing to
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wait for the much slower build, the old behavior can be restored using
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'./configure [..] PROFILE_TASK="-m test --pgo-extended"'. We make no
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guarantees as to which PGO task set produces a faster build. Users who
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care should run their own relevant benchmarks as results can depend on
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the environment, workload, and compiler tool chain.
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14
configure
vendored
14
configure
vendored
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@ -686,6 +686,7 @@ target_vendor
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target_cpu
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target
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LLVM_AR
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PROFILE_TASK
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DEF_MAKE_RULE
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DEF_MAKE_ALL_RULE
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ABIFLAGS
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@ -856,6 +857,7 @@ LDFLAGS
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LIBS
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CPPFLAGS
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CPP
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PROFILE_TASK
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PKG_CONFIG
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PKG_CONFIG_PATH
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PKG_CONFIG_LIBDIR'
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@ -1559,6 +1561,8 @@ Some influential environment variables:
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CPPFLAGS (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
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you have headers in a nonstandard directory <include dir>
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CPP C preprocessor
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PROFILE_TASK
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Python args for PGO generation task
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PKG_CONFIG path to pkg-config utility
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PKG_CONFIG_PATH
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directories to add to pkg-config's search path
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@ -6426,6 +6430,16 @@ else
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DEF_MAKE_RULE="all"
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking PROFILE_TASK" >&5
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$as_echo_n "checking PROFILE_TASK... " >&6; }
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if test -z "$PROFILE_TASK"
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then
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PROFILE_TASK='-m test --pgo'
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $PROFILE_TASK" >&5
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$as_echo "$PROFILE_TASK" >&6; }
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# Make llvm-relatec checks work on systems where llvm tools are not installed with their
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# normal names in the default $PATH (ie: Ubuntu). They exist under the
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# non-suffixed name in their versioned llvm directory.
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@ -1293,6 +1293,14 @@ else
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DEF_MAKE_RULE="all"
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fi
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AC_ARG_VAR(PROFILE_TASK, Python args for PGO generation task)
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AC_MSG_CHECKING(PROFILE_TASK)
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if test -z "$PROFILE_TASK"
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then
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PROFILE_TASK='-m test --pgo'
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fi
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AC_MSG_RESULT($PROFILE_TASK)
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# Make llvm-relatec checks work on systems where llvm tools are not installed with their
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# normal names in the default $PATH (ie: Ubuntu). They exist under the
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# non-suffixed name in their versioned llvm directory.
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