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[ARTICLE · art-164099] src=forum.level1techs.com ↗ pub= topic=ai-infrastructure verified=true sentiment=↓ negative

2 years and I have a small AI server | how do I benchmark? Whats useful to know?

A user running a two-year-old dual Tesla V100 AI server reported that the Strata-V100 fork (commit 7de1934, engine 0.1.45.6) crashes with an "illegal memory access" error during prefill of Qwen3.8-Flash-Next at Q2_0 quantization with 262,144 max context, breaking at roughly 1,700-2,575 tokens while small prompts decode at 56-69 tokens per second. The user ruled out Resizable BAR, which lspci shows is unsupported on the Volta-based V100 cards, and Nvidia passthrough, since both 32GB Tesla PG500-216 GPUs run natively on the Proxmox host rather than in a VM. For comparison, the same stack on llama.cpp reached 356 prefill / 26 decode tokens per second at 32k context, 324 / 28 at 64k, and 272 / 25 at 128k.

read2 min views2 publishedNov 4, 2026

So I forwarded your reply to Muse, this is what Muse replied with:

Q: Can you post the link to the strata fork you’re using?

A: GitHub - jmnargi/Strata-V100: Strata port for Tesla V100 (sm_70): Qwen3.8-Flash-Next with 262K context and MTP · GitHub My install: commit 7de1934, engine 0.1.45.6, CUDA 12.9.1, Qwen3.8-Flash-Next Q2_0, 36G + 27G shards, max-context 262144, KV int8, spec 4, MTP on, port 8081, GPUs [0,1]

Q: Is Resizable BAR on in the BIOS?

A: No, and it’s not available on these cards, checked from the OS, not BIOS guesswork.

Commands used: lspci -s 04:00.0 -v, lspci -s 08:00.0 -v, nvidia-smi

  • No Resizable BAR capability listed in lspci for either card, V100 / Volta doesn’t have consumer ReBAR like a 5060 Ti / Blackwell
  • Full memory is mapped correctly: GPU 0 Memory at 7000000000 [size=32G], GPU 1 Memory at 6000000000 [size=32G], kernel driver in use: nvidia, both Tesla PG500-216, 32GB
  • So BAR is not screwy, and not the cause of the memory errors in my OP Q: Nvidia passthrough funky?

A: Not applicable here. These V100s are on the Proxmox host itself, not VM passthrough, running llama-swap on 8080 and Strata on 8081. No VM restart / reboot-the-host passthrough issue.

My Strata crash, direct:

“prefill: the PLE rows’ upload failed: an illegal memory access was encountered”

“output became non-finite (NaN) twice, engine dropped cached state”

Layer 0, chunk 0, quantize_scatter, break at about 1,700-2,575 tokens. Small prompts work, 56-69 decode, larger crash in about 0.5s with 0 tokens.

Constraints that shaped what I did / didn’t do:

  • No Docker for my product / setup, so I did NOT use Strata’s Docker setup, I built / ran it natively on the host, hand-built first. If that was why I didn’t try a Docker-based bench, that’s the reason, not that I didn’t think of it.
  • I also didn’t run llm-bench-dot-io, because it always uploads results to their site, and I don’t want private code / results uploaded.
  • Smoke tests at 128 / 512 tokens don’t help me, Hermes eats about 30k once it’s loaded my large codebase + tooling, so I need 32k / 64k / 128k benchmarks with real code tasks, not small prompts. My llama.cpp numbers, for comparison, same stack, different engine: 356 prefill / 26 decode at 32k, 324 / 28 at 64k, 272 / 25 at 128k. My friend’s 1x 3060 at 60t/s on Q3 is a different quant, context, engine, and prompt, so not directly comparable.

I hope this helps :C sometimes it tries to talk in as if replying as me and gets mixed up on those type of details.

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