Hardware-level analysis of global load SASS instructions on RTX 4090
August 21, 2026
This technical analysis traces a vector-add CUDA kernel's global load instruction through the RTX 4090 hardware architecture. By performing timing experiments on compiled SASS, the study reveals undocumented hardware paths to optimize memory access patterns for high-performance kernels.
HOW THIS AFFECTS YOU
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researcherYou can use these microbenchmarking techniques to better understand undocumented hardware behaviors during kernel optimization.