Speed test matrix

Thomson-1.0-Small-NVFP4 on CMP 170HX 64GB

vllm · 0.32.0rc1.dev249+g18305948a · NVFP46 contexts (0–248K) × 8 concurrency levels (1–128) · prefill at 8K, 16K, 32K, 64K, 128K

by @Sandbergllm-inference-bench v0.8.0Measured Nov 1, 2026, 13:09 UTC

Hardware

Type: Discrete GPU
GPU: CMP 170HX
VRAM: 64 GB
CPU: 2x Intel Xeon E5-2630 v3
RAM: 64 GB
OS: Ubuntu 26.04.1

Engine

Engine: vllm
Version: 0.32.0rc1.dev249+g18305948a
Quantization: NVFP4
Backend: cuda
Repository: github.com/vllm-project/vllm
Build: ghcr.io/morrowmake/vllm-cmp170hx@sha256:5b45c4d6feafefe2eba962375b0a9a0b64fd22b9e05abb4d1966f14a32a2db79

Run

Served model: bench
Revision: main
Benchmark tool: llm-inference-bench v0.8.0
Decode test: Fixed duration
Prefill mode: Measured during decode warm-up
Time per measurement: 30 s
Max output: 8,192 tokens

Launch command

# Untuned out-of-the-box baseline. Spec decode: none
# 1x NVIDIA CMP 170HX 64GB (cmpunlocker), 180 W limit, PCIe Gen2 x4 | 2x Intel Xeon E5-2630 v3 | 64 GB DDR4 | Ubuntu 26.04.1, NVIDIA driver 610.57.04 | vLLM: Morrowmake vllm-cmp170hx image
vllm serve ProprietaryLegal/Thomson-1.0-Small-NVFP4 --max-model-len 262144 --gpu-memory-utilization 0.94 --max-num-seqs 128 --enable-prefix-caching --trust-remote-code

Prefill

prompt tok/s by context length

8K context6,7311,210 ms TTFT

16K context6,7422,390 ms TTFT

32K context7,1784,469 ms TTFT

64K context6,04010,600 ms TTFT

128K context4,46828,623 ms TTFT

Sustained decode

total tok/s · rows are context length, columns are simultaneous requests

Context	1	2	4	8	16	32	64	128
0	145.9132 ms TTFT	255.8227 ms TTFT	448.8226 ms TTFT	735.7344 ms TTFT	1,161.4410 ms TTFT	1,727.1641 ms TTFT	2,505.2831 ms TTFT	3,224.71,288 ms TTFT
16K	139.2271 ms TTFT	237.2400 ms TTFT	395.6560 ms TTFT	607.8891 ms TTFT	892.91,736 ms TTFT	1,228.52,872 ms TTFT	1,587.65,294 ms TTFT	Over capacity
32K	132.3332 ms TTFT	223.6452 ms TTFT	362.7706 ms TTFT	532.81,022 ms TTFT	740.31,722 ms TTFT	953.53,304 ms TTFT	Over capacity	Over capacity
64K	123.1596 ms TTFT	198.8723 ms TTFT	302.1949 ms TTFT	421.51,495 ms TTFT	547.12,435 ms TTFT	Over capacity	Over capacity	Over capacity
128K	108.2899 ms TTFT	162.91,024 ms TTFT	231.11,589 ms TTFT	297.72,566 ms TTFT	Over capacity	Over capacity	Over capacity	Over capacity
248K	87.41,801 ms TTFT	120.82,437 ms TTFT	157.93,436 ms TTFT	Over capacity	Over capacity	Over capacity	Over capacity	Over capacity

Over capacity: not run because this many requests at this context would exceed the server's KV cache.

TTFT is measured after the benchmark warms the server's prompt cache, so it mostly excludes prefill.

All measurements

Latencies are medians. Total tok/s is output across all simultaneous requests.

Phase	Context	Requests at once	Status	Total tok/s	Per request tok/s	TTFT	Time between tokens	Average active requests	Completed requests	Output tokens	Measured for
Prefill	8K	1	Valid	6,731.0	—	1,210 ms	—	—	1	—	—
Prefill	16K	1	Valid	6,742.0	—	2,390 ms	—	—	1	—	—
Prefill	32K	1	Valid	7,178.0	—	4,469 ms	—	—	1	—	—
Prefill	64K	1	Valid	6,040.0	—	10,600 ms	—	—	1	—	—
Prefill	128K	1	Valid	4,468.0	—	28,623 ms	—	—	1	—	—
Sustained decode	0	1	Valid	145.9	146.2	132 ms	6.8 ms	1.0	0	4,377	30.0 s
Sustained decode	0	2	Valid	255.8	128.2	227 ms	7.8 ms	2.0	0	7,674	30.0 s
Sustained decode	0	4	Valid	448.8	112.6	226 ms	8.9 ms	4.0	0	13,463	30.0 s
Sustained decode	0	8	Valid	735.7	92.8	344 ms	10.8 ms	8.0	0	22,076	30.0 s
Sustained decode	0	16	Valid	1,161.4	73.5	410 ms	13.6 ms	16.0	0	34,837	30.0 s
Sustained decode	0	32	Valid	1,727.1	55.0	641 ms	18.2 ms	32.0	0	51,808	30.0 s
Sustained decode	0	64	Valid	2,505.2	40.0	831 ms	25.0 ms	64.0	0	75,136	30.0 s
Sustained decode	0	128	Valid	3,224.7	25.6	1,288 ms	39.1 ms	128.0	0	96,768	30.0 s
Sustained decode	16K	1	Valid	139.2	139.5	271 ms	7.2 ms	1.0	0	4,177	30.0 s
Sustained decode	16K	2	Valid	237.2	118.6	400 ms	8.4 ms	2.0	0	7,116	30.0 s
Sustained decode	16K	4	Valid	395.6	98.9	560 ms	10.1 ms	4.0	0	11,869	30.0 s
Sustained decode	16K	8	Valid	607.8	75.7	891 ms	13.2 ms	8.0	0	18,232	30.0 s
Sustained decode	16K	16	Valid	892.9	54.7	1,736 ms	18.3 ms	16.0	0	26,816	30.0 s
Sustained decode	16K	32	Valid	1,228.5	37.0	2,872 ms	27.0 ms	32.0	0	36,864	30.0 s
Sustained decode	16K	64	Valid	1,587.6	22.8	5,294 ms	43.9 ms	64.0	0	47,616	30.0 s
Sustained decode	16K	128	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	32K	1	Valid	132.3	132.6	332 ms	7.5 ms	1.0	0	3,968	30.0 s
Sustained decode	32K	2	Valid	223.6	111.9	452 ms	8.9 ms	2.0	0	6,706	30.0 s
Sustained decode	32K	4	Valid	362.7	90.6	706 ms	11.0 ms	4.0	0	10,881	30.0 s
Sustained decode	32K	8	Valid	532.8	66.1	1,022 ms	15.1 ms	8.0	0	15,984	30.0 s
Sustained decode	32K	16	Valid	740.3	45.5	1,722 ms	22.0 ms	16.0	0	22,209	30.0 s
Sustained decode	32K	32	Valid	953.5	28.2	3,304 ms	35.5 ms	32.0	0	28,608	30.0 s
Sustained decode	32K	64	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	32K	128	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	64K	1	Valid	123.1	123.5	596 ms	8.1 ms	1.0	0	3,692	30.0 s
Sustained decode	64K	2	Valid	198.8	99.6	723 ms	10.0 ms	2.0	0	5,964	30.0 s
Sustained decode	64K	4	Valid	302.1	75.3	949 ms	13.3 ms	4.0	0	9,064	30.0 s
Sustained decode	64K	8	Valid	421.5	51.9	1,495 ms	19.3 ms	8.0	0	12,640	30.0 s
Sustained decode	64K	16	Valid	547.1	32.7	2,435 ms	30.6 ms	16.0	0	16,416	30.0 s
Sustained decode	64K	32	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	64K	64	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	64K	128	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	128K	1	Valid	108.2	108.7	899 ms	9.2 ms	1.0	0	3,244	30.0 s
Sustained decode	128K	2	Valid	162.9	81.8	1,024 ms	12.2 ms	2.0	0	4,886	30.0 s
Sustained decode	128K	4	Valid	231.1	57.8	1,589 ms	17.3 ms	4.0	0	6,933	30.0 s
Sustained decode	128K	8	Valid	297.7	37.1	2,566 ms	27.0 ms	8.0	0	8,928	30.0 s
Sustained decode	128K	16	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	128K	32	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	128K	64	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	128K	128	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	248K	1	Valid	87.4	88.0	1,801 ms	11.4 ms	1.0	0	2,622	30.0 s
Sustained decode	248K	2	Valid	120.8	60.6	2,437 ms	16.5 ms	2.0	0	3,622	30.0 s
Sustained decode	248K	4	Valid	157.9	39.0	3,436 ms	25.6 ms	4.0	0	4,736	30.0 s
Sustained decode	248K	8	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	248K	16	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	248K	32	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	248K	64	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	248K	128	Over capacity	—	—	—	—	—	—	—	—

Over capacity: not run because this many requests at this context would exceed the server's KV cache.