bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 14:53:58 -04:00
Code Issues Packages Projects Releases Wiki Activity

kunit: tool: Default --jobs to number of CPUs

Browse Source 
The --jobs parameter for kunit_tool currently defaults to 8 CPUs,
regardless of the number available. For systems with significantly more
(or less), this is not as efficient. Instead, default --jobs to the
number of CPUs available to the process: while there are as many
superstitions as to exactly what the ideal jobs:CPU ratio is, this seems
sufficiently sensible to me.

A new helper function to get the default number of jobs is added:
get_default_jobs() -- this is used in kunit_tool_test instead of a
hardcoded value, or an explicit call to len(os.sched_getaffinity()), so
should be more flexible if this needs to change in the future.

Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
David Gow
2021-12-15 12:50:14 -08:00
committed by Shuah Khan
parent 85310a62ca
commit ad659ccb54
2 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
tools/testing/kunit/kunit_tool_test.py
View File

@@ -527,7 +527,7 @@ class KUnitMainTest(unittest.TestCase):
def test_build_passes_args_pass(self):
kunit.main(['build'], self.linux_source_mock)
self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
self.linux_source_mock.build_kernel.assert_called_once_with(False, 8, '.kunit', None)
self.linux_source_mock.build_kernel.assert_called_once_with(False, kunit.get_default_jobs(), '.kunit', None)
self.assertEqual(self.linux_source_mock.run_kernel.call_count, 0)
def test_exec_passes_args_pass(self):
@@ -633,8 +633,9 @@ class KUnitMainTest(unittest.TestCase):
def test_build_builddir(self):
build_dir = '.kunit'
jobs = kunit.get_default_jobs()
kunit.main(['build', '--build_dir', build_dir], self.linux_source_mock)
self.linux_source_mock.build_kernel.assert_called_once_with(False, 8, build_dir, None)
self.linux_source_mock.build_kernel.assert_called_once_with(False, jobs, build_dir, None)
def test_exec_builddir(self):
build_dir = '.kunit'