[Xiaomi Mi Mix 2S ROMs, Kernels, Recoveries, & Othe] dRm42:
My CPU core frequencies do fluctuate. They might be a bit higher than I'd expect but they're definitely not stuck at peak. However, the logs are flooded with IllegalStateException entries, at the rate of about 30 exceptions per second. I'm wondering if it's the exception handling that drives the frequency higher than it should be. That is, if this is common and isn't unique to my device only. Might be a red herring though.

06-17 10:11:39.548 3572 7429 I SystemUpdate: [Execution,ExecutionManager] Action pending executed for 0.03 seconds.
06-17 10:11:39.554 3572 7429 I SystemUpdate: [Execution,ExecutionManager] Action pre-download-validate executed for 0.00 seconds.
06-17 10:11:39.559 3572 7429 W SystemUpdate: [Execution,ExecutionManager] Unable to create the action. Restart the execution from the scratch.
06-17 10:11:39.559 3572 7429 W SystemUpdate: java.lang.IllegalStateException
06-17 10:11:39.559 3572 7429 W SystemUpdate: at wjj.j(:com.google.android.gms@221859044@22.18.59 (190400-453522955):0)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at bkgz.f(:com.google.android.gms@221859044@22.18.59 (190400-453522955):0)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at bkfs.a(:com.google.android.gms@221859044@22.18.59 (190400-453522955):10)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at com.google.android.gms.update.execution.InstallationIntentOperation.onHandleIntent(:com.google.android.gms@221859044@22.18.59 (190400-453522955):12)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at com.google.android.chimera.IntentOperation.onHandleIntent(:com.google.android.gms@221859044@22.18.59 (190400-453522955):2)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at uim.onHandleIntent(:com.google.android.gms@221859044@22.18.59 (190400-453522955):4)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at ewd.run(:com.google.android.gms@221859044@22.18.59 (190400-453522955):3)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at ewc.run(:com.google.android.gms@221859044@22.18.59 (190400-453522955):11)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at cdgo.run(:com.google.android.gms@221859044@22.18.59 (190400-453522955):2)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
06-17 10:11:39.559 3572 7429 W SystemUpdate: at java.lang.Thread.run(Thread.java:920)
06-17 10:11:39.585 3572 7429 I SystemUpdate: [Execution,ExecutionManager] Action pending executed for 0.03 seconds.
06-17 10:11:39.590 3572 7429 I SystemUpdate: [Execution,ExecutionManager] Action pre-download-validate executed for 0.00 seconds.
06-17 10:11:39.595 3572 7429 W SystemUpdate: [Execution,ExecutionManager] Unable to create the action. Restart the execution from the scratch.
06-17 10:11:39.595 3572 7429 W SystemUpdate: java.lang.IllegalStateException
06-17 10:11:39.595 3572 7429 W SystemUpdate: at wjj.j(:com.google.android.gms@221859044@22.18.59 (190400-453522955):0)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at bkgz.f(:com.google.android.gms@221859044@22.18.59 (190400-453522955):0)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at bkfs.a(:com.google.android.gms@221859044@22.18.59 (190400-453522955):10)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at com.google.android.gms.update.execution.InstallationIntentOperation.onHandleIntent(:com.google.android.gms@221859044@22.18.59 (190400-453522955):12)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at com.google.android.chimera.IntentOperation.onHandleIntent(:com.google.android.gms@221859044@22.18.59 (190400-453522955):2)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at uim.onHandleIntent(:com.google.android.gms@221859044@22.18.59 (190400-453522955):4)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at ewd.run(:com.google.android.gms@221859044@22.18.59 (190400-453522955):3)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at ewc.run(:com.google.android.gms@221859044@22.18.59 (190400-453522955):11)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at cdgo.run(:com.google.android.gms@221859044@22.18.59 (190400-453522955):2)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
06-17 10:11:39.595 3572 7429 W SystemUpdate: at java.lang.Thread.run(Thread.java:920)