TLB Invalidation Scalability Issues and Solutions for ARM Servers

Learn about TLB invalidation (TLBI) challenges and solutions for ARM servers in this technical presentation that explores scalability issues affecting multi-core systems. Discover how TLBI broadcasting to every CPU core in the inner shareable domain impacts performance, particularly in virtual machine workloads on ARM64 servers. Explore implemented solutions including TLBI by range and batched TLBI in the Linux mainline kernel, and understand how limiting TLBI to VM CPU context domains achieved a 50% performance improvement on a 96-core ARM server.