memory-access

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#memory-access

What happens when a GPU reads memory

Hacker News Top ↗ · 2026-08-21 Cached

This blog post details the hardware path of a GPU memory read instruction on an NVIDIA RTX 4090, explaining how a CUDA kernel accesses memory through components like L1 cache and DRAM for performance insights.

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#memory-access

Performance impact of Alignment

Lobsters Hottest ↗ · 2026-08-11 Cached

This technical blog post explains the performance impact of memory alignment in SIMD vectorization, covering architectures with strict alignment requirements, cacheline crossing, and the behavior of modern CPUs.

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#memory-access

NUMA: Cores, memory, and the distance between them

Hacker News Top ↗ · 2026-06-24 Cached

The article explains Non-Uniform Memory Access (NUMA), its historical context, and how it affects performance in multi-socket servers, while also introducing Edera's work on making Xen-based virtualization NUMA-aware end-to-end.

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