Linux Kernel Scheduler

Over the past several years, ARM processors have come to dominate the smartphone industry. They offer very competitive performance-per-watt ratio and allow vendors to buy the necessary building blocks and design their own processors based on ARMv8 architecture.

ARM server processors typically have a lot more physical cores than x86 server processors. L1, L2 and LLC cache as well as NUMA topology is also significantly different from x86. This creates a set of unique challenges for Linux Kernel to maintain optimal performance on ARM servers with hundreds of cores and complex NUMA topologies.

In category Linux Kernel Scheduler we will cover following topics (Tags)

• NUMA balancer placement decisions (NUMA)
• Scheduler load balancer (CFS) placement decisions
• Excessive task migrations due to large core count
• Handling of latency sensitive tasks
• Detection of system overload with lot of task migrations