功能：完善通用云管工作台、审计与诊断能力

docs/evidence/linux-gpu-20261111/box-sched-pair.py

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+"""Sequential single-connection A/B experiment. Always restore normal nice."""
+import json
+import pathlib
+import subprocess
+import time
+pid = int(subprocess.check_output(['pgrep', '-x', 'moonlight']))
+tasks = pathlib.Path('/proc') / str(pid) / 'task'
+tids = [int(p.name) for p in tasks.iterdir() if (p / 'comm').read_text().strip() == 'PacerRender']
+assert len(tids) == 1
+tid = tids[0]
+results = []
+try:
+    for label, priority in [('A', 0), ('B', -10)]:
+        assert int(subprocess.check_output(['pgrep', '-x', 'moonlight'])) == pid
+        subprocess.run(['sudo', '-n', 'renice', '-n', str(priority), '-p', str(tid)], check=True, stdout=subprocess.DEVNULL)
+        begin = time.time()
+        data = json.loads(subprocess.check_output(['python3', '/tmp/vdi-response-50.py'], timeout=150))
+        results.append(dict(label=label, nice=priority, started=begin, ended=time.time(), data=data))
+        print(json.dumps(results[-1]), flush=True)
+finally:
+    subprocess.run(['sudo', '-n', 'renice', '-n', '0', '-p', str(tid)], stdout=subprocess.DEVNULL)