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gh-110722: Make -m test -T -j use sys.monitoring (GH-111710)

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Now all results from worker processes are aggregated and
displayed together as a summary at the end of a regrtest run.

The traditional trace is left in place for use with sequential
in-process test runs but now raises a warning that those
numbers are not precise.

`-T -j` requires `--with-pydebug` as it relies on `-Xpresite=`.
This commit is contained in:
Łukasz Langa 2023-11-10 18:17:45 +01:00 • committed by GitHub
parent 0b06d2482d
commit 3932b0f7b1
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13 changed files with 166 additions and 34 deletions
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14
Lib/test/libregrtest/cmdline.py
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@ -2,7 +2,7 @@ import argparse
import os.path
import shlex
import sys
from test.support import os_helper
from test.support import os_helper, Py_DEBUG
from .utils import ALL_RESOURCES, RESOURCE_NAMES
@ -448,8 +448,16 @@ def _parse_args(args, **kwargs):
if ns.single and ns.fromfile:
parser.error("-s and -f don't go together!")
if ns.use_mp is not None and ns.trace:
parser.error("-T and -j don't go together!")
if ns.trace:
if ns.use_mp is not None:
if not Py_DEBUG:
parser.error("need --with-pydebug to use -T and -j together")
else:
print(
"Warning: collecting coverage without -j is imprecise. Configure"
" --with-pydebug and run -m test -T -j for best results.",
file=sys.stderr
)
if ns.python is not None:
if ns.use_mp is None:
parser.error("-p requires -j!")