Speed test matrix

Qwen3.6-35B-A3B-FP8 on RTX PRO 6000 Blackwell Server Edition 96GB

vllm · 0.30.1rc1.dev452+g73a583112 · FP86 contexts (8K–251K) × 8 concurrency levels (1–128) · prefill at 8K, 16K, 32K, 64K, 128K, 251K, 256K

by @keennaylmx dev importMeasured Oct 11, 2026, 13:35 UTC

Hardware

Type: Discrete GPU
GPU: RTX PRO 6000 Blackwell Server Edition
VRAM: 96 GB
OS: linux

Engine

Engine: vllm
Version: 0.30.1rc1.dev452+g73a583112
Quantization: FP8
Backend: cuda
Repository: github.com/vllm-project/vllm
Build: cuda-13.2
Commit: 73a5831127a9

Run

Served model: qwen
Revision: main
Benchmark tool: llm-inference-bench v0.7.6
Decode test: Fixed duration
Prefill mode: Measured during decode warm-up
Time per measurement: 30 s
Max output: 4,096 tokens

Launch command

env MAX_JOBS=2 FLASHINFER_NVCC_THREADS=1 TORCHINDUCTOR_COMPILE_THREADS=1 "$HOME/env_rtxpro6k-redhatai-vllm-73a5831127a9d2b8/bin/vllm" serve RedHatAI/Qwen3.6-35B-A3B-FP8 --served-model-name qwen --trust-remote-code --tensor-parallel-size 1 --reasoning-parser qwen3 --enable-auto-tool-choice --tool-call-parser qwen3_coder --max-model-len 262144 --gpu-memory-utilization 0.83 --host 0.0.0.0 --port 8000 --api-key <redacted>

Prefill

prompt tok/s by context length

8K context35.5K231 ms TTFT

16K context34.6K468 ms TTFT

32K context33.1K976 ms TTFT

64K context26.7K2,416 ms TTFT

128K context18.6K6,921 ms TTFT

251K context11.7K21,623 ms TTFT

256K context11.5K22,372 ms TTFT

Sustained decode

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

Context	1	2	4	8	16	32	64	128
8K	189.979 ms TTFT	278.1138 ms TTFT	455.1160 ms TTFT	712.6245 ms TTFT	1,084.9346 ms TTFT	1,523.8552 ms TTFT	2,221.7962 ms TTFT	3,177.61,671 ms TTFT
16K	185.877 ms TTFT	272.9110 ms TTFT	445.9185 ms TTFT	676.1247 ms TTFT	1,054.1336 ms TTFT	1,453.1505 ms TTFT	2,070.1825 ms TTFT	Over capacity
32K	176.0111 ms TTFT	259.5189 ms TTFT	431.7257 ms TTFT	670.1347 ms TTFT	980.1513 ms TTFT	1,313.5842 ms TTFT	Over capacity	Over capacity
64K	160.1138 ms TTFT	240.9177 ms TTFT	395.4273 ms TTFT	608.6446 ms TTFT	861.1773 ms TTFT	Over capacity	Over capacity	Over capacity
128K	137.7357 ms TTFT	191.5476 ms TTFT	330.3646 ms TTFT	508.5997 ms TTFT	Over capacity	Over capacity	Over capacity	Over capacity
251K	111.4705 ms TTFT	148.3922 ms TTFT	258.51,304 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	35.5K	—	231 ms	—	—	1	—	—
Prefill	16K	1	Valid	34.6K	—	468 ms	—	—	1	—	—
Prefill	32K	1	Valid	33.1K	—	976 ms	—	—	1	—	—
Prefill	64K	1	Valid	26.7K	—	2,416 ms	—	—	1	—	—
Prefill	128K	1	Valid	18.6K	—	6,921 ms	—	—	1	—	—
Prefill	251K	1	Valid	11.7K	—	21,623 ms	—	—	1	—	—
Prefill	256K	1	Valid	11.5K	—	22,372 ms	—	—	1	—	—
Sustained decode	8K	1	Valid	189.9	190.5	79 ms	5.2 ms	1.0	1	5,696	30.0 s
Sustained decode	8K	2	Valid	278.1	140.7	138 ms	7.1 ms	2.0	2	8,343	30.0 s
Sustained decode	8K	4	Valid	455.1	114.3	160 ms	8.7 ms	4.0	0	13,648	30.0 s
Sustained decode	8K	8	Valid	712.6	89.9	245 ms	11.1 ms	8.0	0	21,376	30.0 s
Sustained decode	8K	16	Valid	1,084.9	68.4	346 ms	14.6 ms	16.0	0	32,544	30.0 s
Sustained decode	8K	32	Valid	1,523.8	48.3	552 ms	20.7 ms	32.0	0	45,696	30.0 s
Sustained decode	8K	64	Valid	2,221.7	35.1	962 ms	28.5 ms	64.0	0	66,624	30.0 s
Sustained decode	8K	128	Valid	3,177.6	24.8	1,671 ms	40.4 ms	128.0	0	95,232	30.0 s
Sustained decode	16K	1	Valid	185.8	186.6	77 ms	5.4 ms	1.0	1	5,574	30.0 s
Sustained decode	16K	2	Valid	272.9	137.3	110 ms	7.3 ms	2.0	2	8,186	30.0 s
Sustained decode	16K	4	Valid	445.9	111.9	185 ms	8.9 ms	4.0	0	13,377	30.0 s
Sustained decode	16K	8	Valid	676.1	85.3	247 ms	11.7 ms	8.0	0	20,280	30.0 s
Sustained decode	16K	16	Valid	1,054.1	66.3	336 ms	15.1 ms	16.0	0	31,616	30.0 s
Sustained decode	16K	32	Valid	1,453.1	45.8	505 ms	21.8 ms	32.0	0	43,584	30.0 s
Sustained decode	16K	64	Valid	2,070.1	32.6	825 ms	30.7 ms	64.0	0	62,080	30.0 s
Sustained decode	16K	128	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	32K	1	Valid	176.0	176.7	111 ms	5.7 ms	1.0	1	5,280	30.0 s
Sustained decode	32K	2	Valid	259.5	131.5	189 ms	7.6 ms	2.0	2	7,784	30.0 s
Sustained decode	32K	4	Valid	431.7	108.2	257 ms	9.2 ms	4.0	0	12,952	30.0 s
Sustained decode	32K	8	Valid	670.1	83.8	347 ms	11.9 ms	8.0	0	20,096	30.0 s
Sustained decode	32K	16	Valid	980.1	61.3	513 ms	16.3 ms	16.0	0	29,392	30.0 s
Sustained decode	32K	32	Valid	1,313.5	41.0	842 ms	24.4 ms	32.0	0	39,392	30.0 s
Sustained decode	32K	64	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	32K	128	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	64K	1	Valid	160.1	160.9	138 ms	6.2 ms	1.0	1	4,803	30.0 s
Sustained decode	64K	2	Valid	240.9	121.2	177 ms	8.3 ms	2.0	2	7,226	30.0 s
Sustained decode	64K	4	Valid	395.4	98.9	273 ms	10.1 ms	4.0	0	11,860	30.0 s
Sustained decode	64K	8	Valid	608.6	76.0	446 ms	13.2 ms	8.0	0	18,256	30.0 s
Sustained decode	64K	16	Valid	861.1	53.4	773 ms	18.7 ms	16.0	0	25,824	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	137.7	139.7	357 ms	7.2 ms	1.0	1	4,131	30.0 s
Sustained decode	128K	2	Valid	191.5	95.6	476 ms	10.5 ms	2.0	0	5,742	30.0 s
Sustained decode	128K	4	Valid	330.3	82.2	646 ms	12.2 ms	4.0	0	9,908	30.0 s
Sustained decode	128K	8	Valid	508.5	62.9	997 ms	15.9 ms	8.0	0	15,248	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	251K	1	Valid	111.4	111.6	705 ms	9.0 ms	1.0	0	3,342	30.0 s
Sustained decode	251K	2	Valid	148.3	74.0	922 ms	13.5 ms	2.0	0	4,450	30.0 s
Sustained decode	251K	4	Valid	258.5	64.1	1,304 ms	15.6 ms	4.0	0	7,752	30.0 s
Sustained decode	251K	8	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	251K	16	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	251K	32	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	251K	64	Over capacity	—	—	—	—	—	—	—	—
Sustained decode	251K	128	Over capacity	—	—	—	—	—	—	—	—

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