Add a Doc about guide on nvidia jetson #3182 (#3205)

Co-authored-by: Shi Shuai <126407087+shuaills@users.noreply.github.com>
Co-authored-by: zhaochenyang20 <zhaochen20@outlook.com>

docs/index.rst

@@ -64,5 +64,6 @@ The core features include:
    references/modelscope.md
    references/contribution_guide.md
    references/troubleshooting.md
+   references/nvidia_jetson.md
    references/faq.md
    references/learn_more.md

docs/references/nvidia_jetson.md

+# Apply SGLang on NVIDIA Jetson Orin
+
+## Prerequisites
+
+Before starting, ensure the following:
+
+- [**NVIDIA Jetson AGX Orin Devkit**](https://www.nvidia.com/en-us/autonomous-machines/embedded-systems/jetson-orin/) is set up with **JetPack 6.1** or later.
+- **CUDA Toolkit** and **cuDNN** are installed.
+- Verify that the Jetson AGX Orin is in **high-performance mode**:
+  ```bash
+  sudo nvpmodel -m 0
+  ```
+- A custom PyPI index hosted at https://pypi.jetson-ai-lab.dev/jp6/cu126, tailored for NVIDIA Jetson Orin platforms and CUDA 12.6.
+
+To install torch from this index:
+  ```bash
+pip install torch --index-url https://pypi.jetson-ai-lab.dev/jp6/cu126
+ ```
+* * * * *
+## Installation
+Please refer to [Installation Guide](https://docs.sglang.ai/start/install.html) to install FlashInfer and SGLang.
+* * * * *
+
+Running Inference
+-----------------------------------------
+
+Launch the server:
+```bash
+python -m sglang.launch_server \
+  --model-path deepseek-ai/DeepSeek-R1-Distill-Llama-8B \
+  --device cuda \
+  --dtype half \
+  --attention-backend flashinfer \
+  --mem-fraction-static 0.8 \
+  --context-length 8192
+```
+The quantization and limited context length (`--dtype half --context-length 8192`) are due to the limited computational resources in [Nvidia jetson kit](https://www.nvidia.com/en-us/autonomous-machines/embedded-systems/jetson-orin/). A detailed explanation can be found in [Server Arguments](https://docs.sglang.ai/backend/server_arguments.html).
+
+After launching the engine, refer to [Chat completions](https://docs.sglang.ai/backend/openai_api_completions.html#Usage) to test the usability.
+* * * * *
+Running quantization with TorchAO
+-------------------------------------
+TorchAO is suggested to NVIDIA Jetson Orin.
+```bash
+python -m sglang.launch_server \
+    --model-path meta-llama/Meta-Llama-3.1-8B-Instruct \
+    --device cuda \
+    --dtype bfloat16 \
+    --attention-backend flashinfer \
+    --mem-fraction-static 0.8 \
+    --context-length 8192 \
+    --torchao-config int4wo-128
+```
+This enables TorchAO's int4 weight-only quantization with a 128-group size. The usage of `--torchao-config int4wo-128` is also for memory efficiency.
+
+
+* * * * *
+Structured output with XGrammar
+-------------------------------
+Please refer to [SGLang doc structured output](https://docs.sglang.ai/backend/structured_outputs.html).
+* * * * *
+
+Thanks to the support from [shahizat](https://github.com/shahizat).
+
+References
+----------
+-   [NVIDIA Jetson AGX Orin Documentation](https://developer.nvidia.com/embedded/jetson-agx-orin)