#Numa

2 posts

Low-Latency Systems Development #6 October 4, 2026 41 min read

Alignment, Layout, and Cache and DRAM Geometry

An access never pays for bytes; it pays for cache lines, and the address decides which lines, which cache set they compete for, and which DRAM channel and bank they live on. Part 1 is alignment: why a double aligned to 8 never …

#cpp #alignment #cache #memory-layout #false-sharing

Low-Latency Systems Development #1 September 9, 2026 17 min read

CPU Isolation and NUMA

The enemy of a low-latency system is jitter, not the mean. The goal is to make your hot thread the only thing that will ever run on its core: pinning kills migration cost, the isolation stack evicts the tick / RCU / interrupts one …

#linux #low-latency #cpu-affinity #numa #isolcpus