ci: better parallel

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

azure-pipelines.yml

@@ -7,7 +7,7 @@ pr:
 jobs:
 - job: linux_311
   timeoutInMinutes: 120
-  pool: {vmImage: 'Ubuntu-20.04'}
+  pool: {vmImage: 'Ubuntu-22.04'}
   steps:
     - task: UsePythonVersion@0
       inputs:
@@ -27,7 +27,7 @@ jobs:
     - bash: |
         python -m pip install dependency-groups
         python -m dependency_groups test | xargs python -m pip install -e.
-        python ./bin/run_tests.py --num-processes 2
+        python ./bin/run_tests.py
 
 - job: windows_311
   pool: {vmImage: 'windows-2019'}

bin/run_tests.py

@@ -8,7 +8,11 @@
 from pathlib import Path
 
 if __name__ == "__main__":
-    default_cpu_count = os.cpu_count() or 2
+    if sys.version_info < (3, 13):
+        default_cpu_count = os.cpu_count() or 2
+    else:
+        default_cpu_count = os.process_cpu_count() or 2
+
     parser = argparse.ArgumentParser()
     parser.add_argument(
         "--run-podman", action="store_true", default=False, help="run podman tests (linux only)"