Speed test matrix
granite-4.2-8b-nvfp4 on CMP 170HX 64GB
vllm · 0.32.0rc1.dev249+g18305948a · NVFP45 contexts (0–120K) × 8 concurrency levels (1–128) · prefill at 8K, 16K, 32K, 64K, 120K
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 ibm-granite/granite-4.2-8b-nvfp4 --max-model-len 131072 --gpu-memory-utilization 0.94 --max-num-seqs 128 --enable-prefix-caching --trust-remote-code
Prefill
prompt tok/s by context length8K context5,1231,600 ms TTFT
16K context4,4953,607 ms TTFT
32K context3,7098,699 ms TTFT
64K context2,71623,701 ms TTFT
120K context1,84865,222 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 | 127.159 ms TTFT | 237.649 ms TTFT | 440.064 ms TTFT | 775.883 ms TTFT | 1,221.8141 ms TTFT | 1,825.1219 ms TTFT | Over capacity | Over capacity |
| 16K | 98.8195 ms TTFT | 162.4242 ms TTFT | 248.1300 ms TTFT | 338.4383 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity |
| 32K | 80.4241 ms TTFT | 119.9364 ms TTFT | 164.2538 ms TTFT | 204.5841 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity |
| 64K | 58.9479 ms TTFT | 77.3634 ms TTFT | 97.5920 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity | Over capacity |
| 120K | 39.8862 ms TTFT | 46.91,041 ms TTFT | 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 | 5,123.0 | — | 1,600 ms | — | — | 1 | — | — |
| Prefill | 16K | 1 | Valid | 4,495.0 | — | 3,607 ms | — | — | 1 | — | — |
| Prefill | 32K | 1 | Valid | 3,709.0 | — | 8,699 ms | — | — | 1 | — | — |
| Prefill | 64K | 1 | Valid | 2,716.0 | — | 23,701 ms | — | — | 1 | — | — |
| Prefill | 120K | 1 | Valid | 1,848.0 | — | 65,222 ms | — | — | 1 | — | — |
| Sustained decode | 0 | 1 | Valid | 127.1 | 128.3 | 59 ms | 7.8 ms | 1.0 | 0 | 3,811 | 30.0 s |
| Sustained decode | 0 | 2 | Valid | 237.6 | 120.6 | 49 ms | 8.3 ms | 2.0 | 0 | 7,126 | 30.0 s |
| Sustained decode | 0 | 4 | Valid | 440.0 | 112.8 | 64 ms | 8.9 ms | 4.0 | 0 | 13,197 | 30.0 s |
| Sustained decode | 0 | 8 | Valid | 775.8 | 100.9 | 83 ms | 9.9 ms | 8.0 | 0 | 23,270 | 30.0 s |
| Sustained decode | 0 | 16 | Valid | 1,221.8 | 80.8 | 141 ms | 12.4 ms | 16.0 | 0 | 36,656 | 30.0 s |
| Sustained decode | 0 | 32 | Valid | 1,825.1 | 60.9 | 219 ms | 16.4 ms | 32.0 | 0 | 54,756 | 30.0 s |
| Sustained decode | 0 | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 0 | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 1 | Valid | 98.8 | 99.2 | 195 ms | 10.1 ms | 1.0 | 0 | 2,964 | 30.0 s |
| Sustained decode | 16K | 2 | Valid | 162.4 | 81.7 | 242 ms | 12.2 ms | 2.0 | 0 | 4,870 | 30.0 s |
| Sustained decode | 16K | 4 | Valid | 248.1 | 62.4 | 300 ms | 16.0 ms | 4.0 | 0 | 7,444 | 30.0 s |
| Sustained decode | 16K | 8 | Valid | 338.4 | 42.4 | 383 ms | 23.6 ms | 8.0 | 0 | 10,152 | 30.0 s |
| Sustained decode | 16K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 16K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 1 | Valid | 80.4 | 80.8 | 241 ms | 12.4 ms | 1.0 | 0 | 2,413 | 30.0 s |
| Sustained decode | 32K | 2 | Valid | 119.9 | 60.2 | 364 ms | 16.6 ms | 2.0 | 0 | 3,596 | 30.0 s |
| Sustained decode | 32K | 4 | Valid | 164.2 | 41.2 | 538 ms | 24.3 ms | 4.0 | 0 | 4,924 | 30.0 s |
| Sustained decode | 32K | 8 | Valid | 204.5 | 25.5 | 841 ms | 39.2 ms | 8.0 | 0 | 6,128 | 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 | 58.9 | 59.1 | 479 ms | 16.9 ms | 1.0 | 0 | 1,766 | 30.0 s |
| Sustained decode | 64K | 2 | Valid | 77.3 | 38.8 | 634 ms | 25.8 ms | 2.0 | 0 | 2,319 | 30.0 s |
| Sustained decode | 64K | 4 | Valid | 97.5 | 24.4 | 920 ms | 40.9 ms | 4.0 | 0 | 2,924 | 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 | 120K | 1 | Valid | 39.8 | 40.0 | 862 ms | 25.0 ms | 1.0 | 0 | 1,193 | 30.0 s |
| Sustained decode | 120K | 2 | Valid | 46.9 | 23.6 | 1,041 ms | 42.4 ms | 2.0 | 0 | 1,406 | 30.0 s |
| Sustained decode | 120K | 4 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 120K | 8 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 120K | 16 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 120K | 32 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 120K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 120K | 128 | Over capacity | — | — | — | — | — | — | — | — |
Over capacity: not run because this many requests at this context would exceed the server's KV cache.