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Message-Id: <20241102-kunit-qemu-accel-macos-v2-1-9d4579fddd20@gmail.com>
Date: Sat, 02 Nov 2024 08:09:48 -0400
From: Tamir Duberstein <tamird@...il.com>
To: Brendan Higgins <brendan.higgins@...ux.dev>,
David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>,
Alyssa Ross <hi@...ssa.is>,
Thomas Weißschuh <thomas@...ch.de>
Cc: linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
linux-kernel@...r.kernel.org, Tamir Duberstein <tamird@...il.com>
Subject: [PATCH v2 1/2] kunit: add fallback for os.sched_getaffinity
Python 3.13 added os.process_cpu_count as a cross-platform alternative
for the Linux-only os.sched_getaffinity. Use it when it's available and
provide a fallback when it's not.
This allows kunit to run on macOS.
Signed-off-by: Tamir Duberstein <tamird@...il.com>
---
tools/testing/kunit/kunit.py | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index bc74088c458aee20b1a21fdeb9f3cb01ab20fec4..3a8cbb868ac559f68d047e38be92f7c64a3314ea 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -303,7 +303,16 @@ def massage_argv(argv: Sequence[str]) -> Sequence[str]:
return list(map(massage_arg, argv))
def get_default_jobs() -> int:
- return len(os.sched_getaffinity(0))
+ if sys.version_info >= (3, 13):
+ if (ncpu := os.process_cpu_count()) is not None:
+ return ncpu
+ raise RuntimeError("os.process_cpu_count() returned None")
+ # See https://github.com/python/cpython/blob/b61fece/Lib/os.py#L1175-L1186.
+ if sys.platform != "darwin":
+ return len(os.sched_getaffinity(0))
+ if (ncpu := os.cpu_count()) is not None:
+ return ncpu
+ raise RuntimeError("os.cpu_count() returned None")
def add_common_opts(parser: argparse.ArgumentParser) -> None:
parser.add_argument('--build_dir',
--
2.47.0
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