➀ This paper discusses the post-silicon validation of the IBM POWER9 processor, highlighting its significance in the context of increasing multi-core processor adoption by hyperscalers.
➁ IBM's Threadmill, a tool for processor verification, has been enhanced since the POWER7, including optimized template allocation and debugging strategies for multi-core write drops.
➂ The validation methodology for POWER9 has significantly improved bug detection rates compared to POWER8, with new techniques like AI prioritization and hardware irritators to induce bugs.