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Thunderbolt 5 connectivity issues plague Llama.cpp RPC benchmarks

By PulseAugur Editorial · [1 sources] ·

A user detailed their experience benchmarking a two-machine setup for running Llama models via RPC, focusing on the performance differences across various network links. The user encountered significant issues with Thunderbolt 5 connectivity, finding it unreliable for DMA-based transfers and ultimately opting for a USB 10Gbps connection. Benchmarks revealed that Thunderbolt 5 performed worse than a standard 5GbE connection in terms of latency and throughput, while USB 10Gbps offered slightly better performance, though with some model-specific exceptions. The testing involved six different models and explored both single-stream and concurrent request handling, noting that memory overflow became an issue for denser models at higher concurrency levels. AI

IMPACT Highlights potential hardware bottlenecks for efficient local LLM deployment.

RANK_REASON User benchmark of hardware connectivity for AI model serving.

Read on dev.to — LLM tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Thunderbolt 5 connectivity issues plague Llama.cpp RPC benchmarks

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26 / 100
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Tool
User benchmark of hardware connectivity for AI model serving.
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Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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infra, product
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High
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Breaking (< 6h)
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COVERAGE [1]

  1. dev.to — LLM tag TIER_1 English(EN) · faliye ·

    I bought Thunderbolt 5 and got USB4 40G: re-benchmarking a two-machine llama.cpp RPC setup across three links and six models

    <p>This post is a follow-up to my previous benchmark. It tests six models across three links — 5GbE, "fake TB5," and USB 10GbE — comparing how link speed affects performance.</p> <p>I'd originally planned to test only TB5, then move on to other things. Buy a cable, plug it in, me…

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