NUMA Emulation Yields "Significant Performance Uplift" to Raspberry Pi 5
Engineers at Igalia developed NUMA emulation for ARM64, enhancing Raspberry Pi 5 performance. Linux kernel patches showed 18% multi-core and 6% single-core improvement in Geekbench tests. The concise code may be merged into the mainline kernel for broader benefits.
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Engineers at Igalia have developed NUMA emulation for ARM64, aiming to boost performance on the Raspberry Pi 5. The emulation, implemented through Linux kernel patches, showed an 18% improvement in multi-core performance and a 6% enhancement in single-core performance based on Geekbench tests. By dividing physical RAM into chunks and using an allocation policy like interleaving, the BCM2721 memory controller can better utilize memory chip parallelism. The code for NUMA emulation on ARM64 is concise, with around 100 lines added. The performance benefits observed on the Raspberry Pi 5 and other ARM64 systems have sparked interest in merging this feature into the mainline kernel. The development is seen as promising for enhancing the performance of these systems through simple yet effective changes in memory management.
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