Speed test matrix
Qwen3.5-4B-AWQ-4bit on CMP 170HX 64GB
vllm · 0.32.0rc1.dev249+g18305948a · AWQ 4-bit6 contexts (0–248K) × 8 concurrency levels (1–128) · prefill at 8K, 16K, 32K, 64K, 128K
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
- AWQ 4-bit
- 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 cyankiwi/Qwen3.5-4B-AWQ-4bit --max-model-len 262144 --gpu-memory-utilization 0.94 --max-num-seqs 128 --enable-prefix-caching --trust-remote-code --language-model-only
Prefill
prompt tok/s by context length8K context9,988816 ms TTFT
16K context9,3371,726 ms TTFT
32K context8,6353,716 ms TTFT
64K context7,1618,941 ms TTFT
128K context5,31324,074 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 | 204.9111 ms TTFT | 385.7188 ms TTFT | 712.5190 ms TTFT | 1,252.1268 ms TTFT | 2,005.7289 ms TTFT | 2,997.4459 ms TTFT | 3,895.3680 ms TTFT | 4,810.51,044 ms TTFT |
| 16K | 185.4240 ms TTFT | 329.9267 ms TTFT | 555.1382 ms TTFT | 851.0602 ms TTFT | 1,161.1985 ms TTFT | 1,449.61,839 ms TTFT | 1,598.83,344 ms TTFT | Over capacity |
| 32K | 171.0299 ms TTFT | 287.3358 ms TTFT | 451.6506 ms TTFT | 637.6772 ms TTFT | 803.01,231 ms TTFT | 937.62,273 ms TTFT | Over capacity | Over capacity |
| 64K | 147.9414 ms TTFT | 227.5615 ms TTFT | 327.3844 ms TTFT | 422.51,378 ms TTFT | 493.82,323 ms TTFT | Over capacity | Over capacity | Over capacity |
| 128K | 115.4770 ms TTFT | 159.51,115 ms TTFT | 209.91,512 ms TTFT | 251.22,380 ms TTFT | Over capacity | Over capacity | Over capacity | Over capacity |
| 248K | 81.41,557 ms TTFT | 101.91,875 ms TTFT | 125.22,870 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 | 9,988.0 | — | 816 ms | — | — | 1 | — | — |
| Prefill | 16K | 1 | Valid | 9,337.0 | — | 1,726 ms | — | — | 1 | — | — |
| Prefill | 32K | 1 | Valid | 8,635.0 | — | 3,716 ms | — | — | 1 | — | — |
| Prefill | 64K | 1 | Valid | 7,161.0 | — | 8,941 ms | — | — | 1 | — | — |
| Prefill | 128K | 1 | Valid | 5,313.0 | — | 24,074 ms | — | — | 1 | — | — |
| Sustained decode | 0 | 1 | Valid | 204.9 | 206.0 | 111 ms | 4.9 ms | 1.0 | 0 | 6,146 | 30.0 s |
| Sustained decode | 0 | 2 | Valid | 385.7 | 194.3 | 188 ms | 5.1 ms | 2.0 | 0 | 11,570 | 30.0 s |
| Sustained decode | 0 | 4 | Valid | 712.5 | 180.4 | 190 ms | 5.5 ms | 4.0 | 0 | 21,376 | 30.0 s |
| Sustained decode | 0 | 8 | Valid | 1,252.1 | 159.4 | 268 ms | 6.3 ms | 8.0 | 0 | 37,560 | 30.0 s |
| Sustained decode | 0 | 16 | Valid | 2,005.7 | 128.6 | 289 ms | 7.8 ms | 16.0 | 0 | 60,176 | 30.0 s |
| Sustained decode | 0 | 32 | Valid | 2,997.4 | 96.3 | 459 ms | 10.4 ms | 32.0 | 0 | 89,920 | 30.0 s |
| Sustained decode | 0 | 64 | Valid | 3,895.3 | 62.1 | 680 ms | 16.1 ms | 64.0 | 0 | 116,864 | 30.0 s |
| Sustained decode | 0 | 128 | Valid | 4,810.5 | 37.8 | 1,044 ms | 26.5 ms | 128.0 | 0 | 144,384 | 30.0 s |
| Sustained decode | 16K | 1 | Valid | 185.4 | 186.1 | 240 ms | 5.4 ms | 1.0 | 0 | 5,563 | 30.0 s |
| Sustained decode | 16K | 2 | Valid | 329.9 | 165.6 | 267 ms | 6.0 ms | 2.0 | 0 | 9,896 | 30.0 s |
| Sustained decode | 16K | 4 | Valid | 555.1 | 139.3 | 382 ms | 7.2 ms | 4.0 | 0 | 16,652 | 30.0 s |
| Sustained decode | 16K | 8 | Valid | 851.0 | 106.4 | 602 ms | 9.4 ms | 8.0 | 0 | 25,528 | 30.0 s |
| Sustained decode | 16K | 16 | Valid | 1,161.1 | 72.2 | 985 ms | 13.9 ms | 16.0 | 0 | 34,832 | 30.0 s |
| Sustained decode | 16K | 32 | Valid | 1,449.6 | 44.5 | 1,839 ms | 22.5 ms | 32.0 | 0 | 43,488 | 30.0 s |
| Sustained decode | 16K | 64 | Valid | 1,598.8 | 23.6 | 3,344 ms | 42.3 ms | 64.0 | 0 | 48,000 | 30.0 s |
| Sustained decode | 16K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 1 | Valid | 171.0 | 171.6 | 299 ms | 5.8 ms | 1.0 | 0 | 5,129 | 30.0 s |
| Sustained decode | 32K | 2 | Valid | 287.3 | 144.2 | 358 ms | 6.9 ms | 2.0 | 0 | 8,618 | 30.0 s |
| Sustained decode | 32K | 4 | Valid | 451.6 | 113.1 | 506 ms | 8.8 ms | 4.0 | 0 | 13,548 | 30.0 s |
| Sustained decode | 32K | 8 | Valid | 637.6 | 79.4 | 772 ms | 12.6 ms | 8.0 | 0 | 19,128 | 30.0 s |
| Sustained decode | 32K | 16 | Valid | 803.0 | 49.5 | 1,231 ms | 20.2 ms | 16.0 | 0 | 24,096 | 30.0 s |
| Sustained decode | 32K | 32 | Valid | 937.6 | 28.1 | 2,273 ms | 35.5 ms | 32.0 | 0 | 28,128 | 30.0 s |
| Sustained decode | 32K | 64 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 32K | 128 | Over capacity | — | — | — | — | — | — | — | — |
| Sustained decode | 64K | 1 | Valid | 147.9 | 148.5 | 414 ms | 6.7 ms | 1.0 | 0 | 4,437 | 30.0 s |
| Sustained decode | 64K | 2 | Valid | 227.5 | 114.2 | 615 ms | 8.8 ms | 2.0 | 0 | 6,824 | 30.0 s |
| Sustained decode | 64K | 4 | Valid | 327.3 | 81.9 | 844 ms | 12.2 ms | 4.0 | 0 | 9,816 | 30.0 s |
| Sustained decode | 64K | 8 | Valid | 422.5 | 52.7 | 1,378 ms | 19.0 ms | 8.0 | 0 | 12,672 | 30.0 s |
| Sustained decode | 64K | 16 | Valid | 493.8 | 30.6 | 2,323 ms | 32.7 ms | 16.0 | 0 | 14,816 | 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 | 115.4 | 116.0 | 770 ms | 8.6 ms | 1.0 | 0 | 3,463 | 30.0 s |
| Sustained decode | 128K | 2 | Valid | 159.5 | 80.1 | 1,115 ms | 12.5 ms | 2.0 | 0 | 4,784 | 30.0 s |
| Sustained decode | 128K | 4 | Valid | 209.9 | 52.6 | 1,512 ms | 19.0 ms | 4.0 | 0 | 6,296 | 30.0 s |
| Sustained decode | 128K | 8 | Valid | 251.2 | 31.4 | 2,380 ms | 31.9 ms | 8.0 | 0 | 7,536 | 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 | 81.4 | 81.9 | 1,557 ms | 12.2 ms | 1.0 | 0 | 2,441 | 30.0 s |
| Sustained decode | 248K | 2 | Valid | 101.9 | 51.4 | 1,875 ms | 19.5 ms | 2.0 | 0 | 3,054 | 30.0 s |
| Sustained decode | 248K | 4 | Valid | 125.2 | 31.6 | 2,870 ms | 31.7 ms | 4.0 | 0 | 3,756 | 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.