How RCU Works: Grace Periods, Quiescent States, and Why Readers Skip Locks
A shared linked list in the kernel can be walked by thousands of cores at once. A writer still has to insert or delete a node. If every walk...
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How CPU Caches Work: Lines, Associativity, and False Sharing
A load that misses DRAM can cost hundreds of cycles. A load that hits L1 often costs a handful. That gap is why two programs with the same b...
Sarthak Bystander
18 Sept, 2026