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from contextlib import suppress
import pytest
try:
import psutil
except ImportError:
psutil = None
try:
from os import process_cpu_count
except ImportError:
process_cpu_count = None
try:
from os import sched_getaffinity
except ImportError:
sched_getaffinity = None
@pytest.mark.skipif(psutil is None, reason="psutil needs to be installed")
def test_auto_detect_cpus_psutil_affinity(
pytester: pytest.Pytester, monkeypatch: pytest.MonkeyPatch
) -> None:
import psutil
monkeypatch.setattr(
psutil.Process, "cpu_affinity", lambda self: list(range(10)), raising=False
)
pytester.makepyfile("""
def test_auto_detect_cpus(num_parallel_threads):
assert num_parallel_threads == 10
""")
# run pytest with the following cmd args
result = pytester.runpytest("--parallel-threads=auto", "-v")
# fnmatch_lines does an assertion internally
result.stdout.fnmatch_lines(
[
"*::test_auto_detect_cpus PARALLEL PASSED*",
]
)
@pytest.mark.skipif(psutil is None, reason="psutil needs to be installed")
def test_auto_detect_cpus_psutil_cpu_count(
pytester: pytest.Pytester, monkeypatch: pytest.MonkeyPatch
) -> None:
import psutil
monkeypatch.delattr(psutil.Process, "cpu_affinity", raising=False)
monkeypatch.setattr(psutil, "cpu_count", lambda: 10)
pytester.makepyfile("""
def test_auto_detect_cpus(num_parallel_threads):
assert num_parallel_threads == 10
""")
# run pytest with the following cmd args
result = pytester.runpytest("--parallel-threads=auto", "-v")
# fnmatch_lines does an assertion internally
result.stdout.fnmatch_lines(
[
"*::test_auto_detect_cpus PARALLEL PASSED*",
]
)
@pytest.mark.skipif(
process_cpu_count is None, reason="process_cpu_count is available in >=3.13"
)
def test_auto_detect_process_cpu_count(
pytester: pytest.Pytester, monkeypatch: pytest.MonkeyPatch
) -> None:
with suppress(ImportError):
import psutil
monkeypatch.delattr(psutil.Process, "cpu_affinity", raising=False)
monkeypatch.setattr(psutil, "cpu_count", lambda: None)
monkeypatch.setattr("os.process_cpu_count", lambda: 10)
pytester.makepyfile("""
def test_auto_detect_cpus(num_parallel_threads):
assert num_parallel_threads == 10
""")
# run pytest with the following cmd args
result = pytester.runpytest("--parallel-threads=auto", "-v")
# fnmatch_lines does an assertion internally
result.stdout.fnmatch_lines(
[
"*::test_auto_detect_cpus PARALLEL PASSED*",
]
)
@pytest.mark.skipif(
sched_getaffinity is None,
reason="sched_getaffinity is available certain platforms only",
)
def test_auto_detect_sched_getaffinity(
pytester: pytest.Pytester, monkeypatch: pytest.MonkeyPatch
) -> None:
with suppress(ImportError):
import psutil
monkeypatch.delattr(psutil.Process, "cpu_affinity", raising=False)
monkeypatch.setattr(psutil, "cpu_count", lambda: None)
monkeypatch.setattr("os.process_cpu_count", lambda: None, raising=False)
monkeypatch.setattr("os.sched_getaffinity", lambda pid: list(range(10)))
pytester.makepyfile("""
def test_auto_detect_cpus(num_parallel_threads):
assert num_parallel_threads == 10
""")
# run pytest with the following cmd args
result = pytester.runpytest("--parallel-threads=auto", "-v")
# fnmatch_lines does an assertion internally
result.stdout.fnmatch_lines(
[
"*::test_auto_detect_cpus PARALLEL PASSED*",
]
)
def test_auto_detect_cpu_count(
pytester: pytest.Pytester, monkeypatch: pytest.MonkeyPatch
) -> None:
with suppress(ImportError):
import psutil
monkeypatch.delattr(psutil.Process, "cpu_affinity", raising=False)
monkeypatch.setattr(psutil, "cpu_count", lambda: None)
monkeypatch.setattr("os.process_cpu_count", lambda: None, raising=False)
monkeypatch.setattr("os.sched_getaffinity", lambda pid: None, raising=False)
monkeypatch.setattr("os.cpu_count", lambda: 10)
pytester.makepyfile("""
def test_auto_detect_cpus(num_parallel_threads):
assert num_parallel_threads == 10
""")
# run pytest with the following cmd args
result = pytester.runpytest("--parallel-threads=auto", "-v")
# fnmatch_lines does an assertion internally
result.stdout.fnmatch_lines(
[
"*::test_auto_detect_cpus PARALLEL PASSED*",
]
)
|
