Speed test matrix
Step-3.7-Flash-148B on CMP 170HX 64GB ×2
vllm · 0.32.0rc1.dev249+g18305948a · NVFP46 contexts (0–248K) × 8 concurrency levels (1–128) · prefill at 8K, 16K, 32K, 64K, 128K
Hardware
- Type
- Discrete GPU
- GPU
- CMP 170HX
- GPU count
- 2
- VRAM
- 64 GB (2 × 32 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: MTP, 1 tokens lookahead. Layout: PP2 (stock vLLM flag)
# 2x 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 0xSero/Step-3.7-Flash-148B --max-model-len 262144 --gpu-memory-utilization 0.94 --max-num-seqs 128 --enable-prefix-caching --trust-remote-code --pipeline-parallel-size 2 --language-model-only --hf-overrides {"text_config":{"tie_word_embeddings":false}} --speculative-config {"method":"mtp","num_speculative_tokens":1}Prefill
prompt tok/s by context length8K context4,5351,786 ms TTFT
16K context5,0923,148 ms TTFT
32K context4,9596,435 ms TTFT
64K context4,44414,329 ms TTFT
128K context3,58335,504 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 | 58.7108 ms TTFT | 121.3108 ms TTFT | 204.1156 ms TTFT | 340.7239 ms TTFT | 504.9330 ms TTFT | 781.0447 ms TTFT | Over capacity | Over capacity |
| 16K | 59.0186 ms TTFT | 103.5210 ms TTFT | 196.0333 ms TTFT | 328.2520 ms TTFT | 505.7717 ms TTFT | Over capacity | Over capacity | Over capacity |
| 32K | 61.6296 ms TTFT | 102.9351 ms TTFT | 192.7551 ms TTFT | 316.4910 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity |
| 64K | 58.7445 ms TTFT | 103.9606 ms TTFT | 191.1880 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity |
| 128K | 59.0870 ms TTFT | 105.41,008 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity |
| 248K | 58.11,630 ms TTFT | Over capacity | Over capacity | 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 | 4,535.0 | — | 1,786 ms | — | — | 1 | — | — |
| Prefill | 16K | 1 | Valid | 5,092.0 | — | 3,148 ms | — | — | 1 | — | — |
| Prefill | 32K | 1 | Valid | 4,959.0 | — | 6,435 ms | — | — | 1 | — | — |
| Prefill | 64K | 1 | Valid | 4,444.0 | — | 14,329 ms | — | — | 1 | — | — |
| Prefill | 128K | 1 | Valid | 3,583.0 | — | 35,504 ms | — | — | 1 | — | — |
| Sustained decode | 0 | 1 | Valid | 58.7 | 58.6 | 108 ms | 17.1 ms | 1.0 | 0 | 1,759 | 30.0 s |
| Sustained decode | 0 | 2 | Valid | 121.3 | 60.4 | 108 ms | 16.6 ms | 2.0 | 0 | 3,638 | 30.0 s |
| Sustained decode | 0 | 4 | Valid | 204.1 | 50.7 | 156 ms | 19.7 ms | 4.0 | 0 | 6,120 | 30.0 s |
| Sustained decode | 0 | 8 | Valid | 340.7 | 42.5 | 239 ms | 23.5 ms | 8.0 | 0 | 10,219 | 30.0 s |
| Sustained decode | 0 | 16 | Valid | 504.9 | 32.2 | 330 ms | 31.1 ms | 16.0 | 0 | 15,130 | 30.0 s |
| Sustained decode | 0 | 32 | Valid | 781.0 | 25.0 | 447 ms | 40.0 ms | 32.0 | 0 | 23,425 | 30.0 s |
| Sustained decode | 0 | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 0 | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 1 | Valid | 59.0 | 59.1 | 186 ms | 16.9 ms | 1.0 | 0 | 1,771 | 30.0 s |
| Sustained decode | 16K | 2 | Valid | 103.5 | 52.0 | 210 ms | 19.2 ms | 2.0 | 0 | 3,104 | 30.0 s |
| Sustained decode | 16K | 4 | Valid | 196.0 | 49.7 | 333 ms | 20.1 ms | 4.0 | 0 | 5,879 | 30.0 s |
| Sustained decode | 16K | 8 | Valid | 328.2 | 41.3 | 520 ms | 24.2 ms | 8.0 | 0 | 9,844 | 30.0 s |
| Sustained decode | 16K | 16 | Valid | 505.7 | 31.9 | 717 ms | 31.3 ms | 16.0 | 0 | 15,166 | 30.0 s |
| Sustained decode | 16K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 1 | Valid | 61.6 | 61.8 | 296 ms | 16.2 ms | 1.0 | 0 | 1,848 | 30.0 s |
| Sustained decode | 32K | 2 | Valid | 102.9 | 51.6 | 351 ms | 19.4 ms | 2.0 | 0 | 3,086 | 30.0 s |
| Sustained decode | 32K | 4 | Valid | 192.7 | 48.3 | 551 ms | 20.7 ms | 4.0 | 0 | 5,779 | 30.0 s |
| Sustained decode | 32K | 8 | Valid | 316.4 | 39.9 | 910 ms | 25.1 ms | 8.0 | 0 | 9,490 | 30.0 s |
| Sustained decode | 32K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 1 | Valid | 58.7 | 59.2 | 445 ms | 16.9 ms | 1.0 | 0 | 1,762 | 30.0 s |
| Sustained decode | 64K | 2 | Valid | 103.9 | 51.9 | 606 ms | 19.3 ms | 2.0 | 0 | 3,115 | 30.0 s |
| Sustained decode | 64K | 4 | Valid | 191.1 | 48.1 | 880 ms | 20.8 ms | 4.0 | 0 | 5,732 | 30.0 s |
| Sustained decode | 64K | 8 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 128K | 1 | Valid | 59.0 | 59.3 | 870 ms | 16.9 ms | 1.0 | 0 | 1,769 | 30.0 s |
| Sustained decode | 128K | 2 | Valid | 105.4 | 53.3 | 1,008 ms | 18.8 ms | 2.0 | 0 | 3,159 | 30.0 s |
| Sustained decode | 128K | 4 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 128K | 8 | Over capacity | — | — | — | — | — | — | — | — |
| 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 | 58.1 | 58.8 | 1,630 ms | 17.0 ms | 1.0 | 0 | 1,743 | 30.0 s |
| Sustained decode | 248K | 2 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 248K | 4 | Over capacity | — | — | — | — | — | — | — | — |
| 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.