How Linux Kernel Lockless Data Structures Boost Performance

In this episode, Lucas and Luna explore lockless data structures in the Linux kernel — specifically read-copy-update (RCU) and lock-free queues — and how they eliminate contention in multi-core systems. They walk through a concrete example: how a major CDN provider replaced a spinlock-protected hash table with an RCU-based design, cutting p99 latency from 12 milliseconds to under 200 microseconds. The episode also covers when NOT to use lockless techniques, the memory-ordering pitfalls that trip up developers, and why kernel maintainers are increasingly adopting these patterns for io_uring and networking stacks. A practical deep dive for systems programmers and performance engineers.

#Linux #Kernel #LocklessDataStructures #RCU #LockFreeQueues #Performance #MultiCore #Concurrency #CDN #MemoryOrdering #io_uring #NetworkingStack #SystemsProgramming #OpenSource #Technology #FexingoBusiness #BusinessPodcast #LinuxPodcast

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