GitLab

Previously several parts of the stack ensured max tokens (for this single request) was set.

Now only text input sets it (to 8k). Everything else leaves as is, potentially blank. The engines themselves have very small defaults, 16 for vllm and 128 for sglang.

Also fix dynamo-run CUDA startup message to only print if we're using an engine that would benefit from it (mistralrs, llamacpp).

Co-authored-by: Piotr Tarasiewicz <ptarasiewicz@nvidia.com>

Co-authored-by: hongkuanz <hongkuanz@nvidia.com>
Co-authored-by: Meenakshi Sharma <163925564+nvda-mesharma@users.noreply.github.com>
Co-authored-by: Dmitry Tokarev <dtokarev@nvidia.com>

Co-authored-by: hongkuanz <hongkuanz@nvidia.com>

Co-authored-by: Maksim Khadkevich <mkhadkevich@nvidia.com>

Co-authored-by: Julien Mancuso <jmancuso@nvidia.com>
Co-authored-by: Hannah Zhang <hannahz@nvidia.com>
Co-authored-by: Biswa Panda <biswa.panda@gmail.com>
Co-authored-by: Maksim Khadkevich <mkhadkevich@nvidia.com>

Co-authored-by: Ryan McCormick <rmccormick@nvidia.com>
Co-authored-by: Neelay Shah <neelays@nvidia.com>

```
dynamo-run in=batch:prompts.jsonl out=mistralrs ~/llm_models/Llama-3.2-3B-Instruct/
```

The file has genai format, one entry per line:
```
{"text": "the prompt"}
{"text": ..etc
```

The prompt is evaluated and the output written to `output.jsonl` in the
same folder as the input.

At the end of the run various statistics are printed:
> Ran 5 files in 8s 679ms. Tokens in: 40 (5/s). Tokens out: 346 (43/s)

This is also helpful for pushing load into the system and stressing the
various components. Not intended for performance measurement, it's a
batch inference tool.

Engines mistralrs, sglang and vllm included by default. Can be disabled like this: `cargo build --no-default-features --features <add-back-what-you-want>`.

Added `--feature vulkan` option, for llamacpp.

Build time message if CUDA or Metal would help and are missing. That's the best we can do:
> warning: dynamo-run@0.1.0: CUDA not enabled, re-run with `--features cuda`

Runtime message if CUDA, Metal or Vulkan are enabled:
> 2025-03-14T21:59:26.501937Z  INFO dynamo_run: CUDA on

Runtime message if they are missing:
> 2025-03-14T22:02:37.439404Z  INFO dynamo_run: CPU mode. Rebuild with `--features cuda|metal|vulkan` for better performance

Defaut engine message includes available engines:
> 2025-03-14T21:59:26.503612Z  INFO dynamo_run: Using default engine: mistralrs. Use out=<engine> to specify one of echo_core, echo_full, mistralrs, llamacpp, sglang, vllm, pystr, pytok

The really important outcome is that this should now "just work":
```
cargo install dynamo-run
dynamo-run Qwen/Qwen2.5-3B-Instruct
```

Sadly you still need `--features cuda|metal` for performance, I couldn't automate that.