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SBC inference experiments: early impressions
#1
Thought I'd post a small recipe because a lot of threads ask similar things.

Just sharing a setup that ended up working reasonably well: Llama, vLLM, 7900 XTX, with a lot of attention on small local stacks.

Feel free to tear it apart if you see something dumb.
rack in the garage • local models everywhere
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#2
Ran a quick check on my box. On mini PC with llama.cpp, I saw basically the same behavior. The surprise was that memory pressure showed up before throughput collapsed.
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#3
What exact setup are you running? What model, what runtime, and roughly what context size?
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#4
Quote:What exact setup are you running? What model, what runtime, and roughly what context size?

Ran a quick check on my box. My result was mixed: first run looked bad, second run looked normal. The surprise was that memory pressure showed up before throughput collapsed.
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#5
Good point. That matches what I saw on M3 Max. I got better results once I stopped chasing one metric and just looked at whether the workflow felt usable.
rack in the garage • local models everywhere
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#6
Appreciate the detail. The pattern around continuous batching has been pretty similar for me.
small models can still be good
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#7
Quote:Appreciate the detail. The pattern around continuous batching has been pretty similar for me.

A couple things I'd check first. Start by verifying the driver/runtime combo, then test with a smaller prompt, then look at batch size. Not glamorous advice, but repeatable baselines save a lot of time.
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#8
That matches what I was seeing. I don't think your conclusion is far off.
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#9
Appreciate the detail. I don't think your conclusion is far off. The biggest change for me was simplifying the stack instead of adding one more optimization layer.
curious and caffeinated
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#10
What worked for me was pretty simple. Before rebuilding anything, I'd test one clean baseline with Qwen and compare from there. A lot of these threads end up being one bad config plus a pile of conclusions drawn from it.
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