(Impact of) Recent CPU topology changes
summary
Recent CPU topology parsing changes fix DT cluster/socket misinterpretation and improve last‑level cache detection via device tree/ACPI/sysfs, so configurations that relied on artificial CPU map cluster parsing (a.k.a. Phantom domains) stop appearing: platforms become a flattened MC topology with all CPUs sharing L3. Energy‑aware scheduling and the simplified energy model remain unaffected, but load balancing touches all CPUs more often and any scheduler hooks that assume phantom groups will break unless replaced.
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chapters (7)
- 0:00Introduction
- 1:03CPU topology basics
- 4:40Recent topology changes
- 6:03Phantom domains explained
- 7:28Impact on Phantom domains
- 9:56Scheduler impact
- 11:48Conclusion and Q&A
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