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make -J behavior default in test.py #40945

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make -J behavior default in test.py #40945

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d2244c1
tools,test: make -J behavior default for test.py
Trott Nov 24, 2021
c85a45b
doc: remove legacy -J test.py option from BUILDING.md
Trott Nov 24, 2021
1fe77c7
build: remove legacy -J test.py option from Makefile/vcbuild
Trott Nov 24, 2021
01db947
fixup! tools,test: make -J behavior default for test.py
Trott Nov 25, 2021
54996df
fixup! doc: remove legacy -J test.py option from BUILDING.md
Trott Nov 26, 2021
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2 changes: 1 addition & 1 deletion BUILDING.md
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Expand Up @@ -403,7 +403,7 @@ by providing the name of a subsystem:

```text
$ make coverage-clean
$ NODE_V8_COVERAGE=coverage/tmp tools/test.py -J --mode=release child-process
$ NODE_V8_COVERAGE=coverage/tmp tools/test.py --mode=release child-process
$ make coverage-report-js
```

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2 changes: 1 addition & 1 deletion Makefile
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Expand Up @@ -23,7 +23,7 @@ FIND ?= find
ifdef JOBS
PARALLEL_ARGS = -j $(JOBS)
else
PARALLEL_ARGS = -J
PARALLEL_ARGS =
endif

ifdef ENABLE_V8_TAP
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13 changes: 9 additions & 4 deletions tools/test.py
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Expand Up @@ -1362,9 +1362,9 @@ def BuildOptions():
default="")
result.add_option("--warn-unused", help="Report unused rules",
default=False, action="store_true")
result.add_option("-j", help="The number of parallel tasks to run",
default=1, type="int")
result.add_option("-J", help="Run tasks in parallel on all cores",
result.add_option("-j", help="The number of parallel tasks to run, 0=use number of cores",
default=0, type="int")
result.add_option("-J", help="For legacy compatibility, has no effect",
default=False, action="store_true")
result.add_option("--time", help="Print timing information after running",
default=False, action="store_true")
Expand Down Expand Up @@ -1423,11 +1423,16 @@ def ProcessOptions(options):
if options.run[0] >= options.run[1]:
print("The test group to run (n) must be smaller than number of groups (m).")
return False
if options.J:
if options.j == 0:
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This changes precedence of the -j and -J flags, e.g. if test.py -j 3 -J was run and JOBS=2 then the old code would have overwritten the j value from JOBS but the new code would leave j unchanged.

It's probably a rare edge case that both flags would be specified.

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If we keep it so -J effectively negates -j, we'll have to update the help text to indicate that -J doesn't quite have no effect at all.

If we want to preserve that behavior, then perhaps the thing to do is print a warning when someone is using both -J and -j? Or maybe print a warning every time -J is used?

I suspect, like you, that this is a rare edge case. I also suspect that it basically does not matter. Like, if we run with 2 processes instead of 4 (or the other way around) in a rare edge case....oh well?

@richardlau Would you be comfortable if we kept the behavior as it is in this PR but add a warning that gets printed if both -j and -J are specified?

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I'd be okay with that.

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@richardlau Would you be comfortable if we kept the behavior as it is in this PR but add a warning that gets printed if both -j and -J are specified?

This is the behavior I've implemented in a fixup commit. PTAL.

# inherit JOBS from environment if provided. some virtualised systems
# tends to exaggerate the number of available cpus/cores.
cores = os.environ.get('JOBS')
options.j = int(cores) if cores is not None else multiprocessing.cpu_count()
elif options.J:
# If someone uses -j and legacy -J, let them know that we will be respecting
# -j and ignoring -J, which is the opposite of what we used to do before -J
# became a legacy no-op.
print('Warning: Legacy -J option is ignored. Using the -j option.')
if options.flaky_tests not in [RUN, SKIP, DONTCARE]:
print("Unknown flaky-tests mode %s" % options.flaky_tests)
return False
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10 changes: 5 additions & 5 deletions vcbuild.bat
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Expand Up @@ -92,9 +92,9 @@ if /i "%1"=="nosnapshot" set nosnapshot=1&goto arg-ok
if /i "%1"=="noetw" set noetw=1&goto arg-ok
if /i "%1"=="ltcg" set ltcg=1&goto arg-ok
if /i "%1"=="licensertf" set licensertf=1&goto arg-ok
if /i "%1"=="test" set test_args=%test_args% -J %common_test_suites%&set lint_cpp=1&set lint_js=1&set lint_md=1&goto arg-ok
if /i "%1"=="test-ci-native" set test_args=%test_args% %test_ci_args% -J -p tap --logfile test.tap %CI_NATIVE_SUITES% %CI_DOC%&set build_addons=1&set build_js_native_api_tests=1&set build_node_api_tests=1&set cctest_args=%cctest_args% --gtest_output=xml:cctest.junit.xml&goto arg-ok
if /i "%1"=="test-ci-js" set test_args=%test_args% %test_ci_args% -J -p tap --logfile test.tap %CI_JS_SUITES%&set no_cctest=1&goto arg-ok
if /i "%1"=="test" set test_args=%test_args% %common_test_suites%&set lint_cpp=1&set lint_js=1&set lint_md=1&goto arg-ok
if /i "%1"=="test-ci-native" set test_args=%test_args% %test_ci_args% -p tap --logfile test.tap %CI_NATIVE_SUITES% %CI_DOC%&set build_addons=1&set build_js_native_api_tests=1&set build_node_api_tests=1&set cctest_args=%cctest_args% --gtest_output=xml:cctest.junit.xml&goto arg-ok
if /i "%1"=="test-ci-js" set test_args=%test_args% %test_ci_args% -p tap --logfile test.tap %CI_JS_SUITES%&set no_cctest=1&goto arg-ok
if /i "%1"=="build-addons" set build_addons=1&goto arg-ok
if /i "%1"=="build-js-native-api-tests" set build_js_native_api_tests=1&goto arg-ok
if /i "%1"=="build-node-api-tests" set build_node_api_tests=1&goto arg-ok
Expand All @@ -103,7 +103,7 @@ if /i "%1"=="test-doc" set test_args=%test_args% %CI_DOC%&set doc=1&&set li
if /i "%1"=="test-js-native-api" set test_args=%test_args% js-native-api&set build_js_native_api_tests=1&goto arg-ok
if /i "%1"=="test-node-api" set test_args=%test_args% node-api&set build_node_api_tests=1&goto arg-ok
if /i "%1"=="test-benchmark" set test_args=%test_args% benchmark&goto arg-ok
if /i "%1"=="test-simple" set test_args=%test_args% sequential parallel -J&goto arg-ok
if /i "%1"=="test-simple" set test_args=%test_args% sequential parallel&goto arg-ok
if /i "%1"=="test-message" set test_args=%test_args% message&goto arg-ok
if /i "%1"=="test-tick-processor" set test_args=%test_args% tick-processor&goto arg-ok
if /i "%1"=="test-internet" set test_args=%test_args% internet&goto arg-ok
Expand Down Expand Up @@ -644,7 +644,7 @@ if defined test_node_inspect goto node-test-inspect
goto node-tests

:node-check-deopts
python tools\test.py --mode=release --check-deopts parallel sequential -J
python tools\test.py --mode=release --check-deopts parallel sequential
if defined test_node_inspect goto node-test-inspect
goto node-tests

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