[docs]: Add deepseek-v3.2 run tutorial (#1659)

Author: ovowei

doc/en/kt-kernel/deepseek-v3.2-sglang-tutorial.md

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+# Running DeepSeek V3.2 with SGLang and KT-Kernel
+
+This tutorial demonstrates how to run DeepSeek V3.2 model inference using SGLang integrated with KT-Kernel for CPU-GPU heterogeneous inference. This setup enables efficient deployment of large MoE models by offloading experts to CPU.
+
+## Table of Contents
+
+- [Hardware Requirements](#hardware-requirements)
+- [Prerequisites](#prerequisites)
+- [Step 1: Download Model Weights](#step-1-download-model-weights)
+- [Step 2: Quantize CPU Weights](#step-2-quantize-cpu-weights)
+- [Step 3: Launch SGLang Server](#step-3-launch-sglang-server)
+- [Step 4: Send Inference Requests](#step-4-send-inference-requests)
+
+## Hardware Requirements
+
+**Minimum Configuration:**
+- **GPU**: NVIDIA L20 48GB (or equivalent with at least 27GB VRAM available)
+- **CPU**: Intel Xeon with AMX support (e.g., Sapphire Rapids)
+- **RAM**: At least 350GB system memory for INT4 quantization
+- **Storage**: ~1TB for model weights (FP8 + INT4 quantized)
+
+**Tested Configuration:**
+- **GPU**: NVIDIA L20 48GB
+- **CPU**: Intel(R) Xeon(R) Platinum 8488C
+- **RAM**: 2TB DDR5
+- **OS**: Linux (Ubuntu 20.04+ recommended)
+
+## Prerequisites
+
+Before starting, ensure you have:
+
+1. **KT-Kernel installed** - Follow the [installation guide](./kt-kernel_intro.md#installation)
+2. **SGLang installed** - Follow [SGLang integration steps](./kt-kernel_intro.md#integration-with-sglang)
+3. **CUDA toolkit** - Compatible with your GPU (CUDA 11.8+ recommended)
+4. **Hugging Face CLI** - For downloading models:
+   ```bash
+   pip install huggingface-hub
+   ```
+
+## Step 1: Download Model Weights
+
+DeepSeek V3.2 requires downloading model repositories:
+
+1. **DeepSeek-V3.2**
+2. **DeepSeek-V3.2-Speciale**
+
+```bash
+# Create a directory for models
+mkdir -p /path/to/models
+cd /path/to/models
+
+# Download DeepSeek-V3.2 (FP8 weights for GPU)
+huggingface-cli download deepseek-ai/DeepSeek-V3.2 \
+  --local-dir /path/to/deepseek-v3.2
+
+# Download DeepSeek-V3.2-Speciale (if needed)
+huggingface-cli download deepseek-ai/DeepSeek-V3.2-Speciale \
+  --local-dir /path/to/deepseek-v3.2-speciale
+```
+
+**Note:** Replace `/path/to/models` with your actual storage path throughout this tutorial.
+
+## Step 2: Quantize CPU Weights
+
+Convert the FP8 GPU weights to INT4 quantized CPU weights using the provided conversion script.
+
+### Conversion Command
+
+For a 2-NUMA system with 60 physical cores:
+
+```bash
+cd /path/to/ktransformers/kt-kernel
+
+python scripts/convert_cpu_weights.py \
+  --input-path /path/to/deepseek-v3.2 \
+  --input-type fp8 \
+  --output /path/to/deepseek-v3.2-INT4 \
+  --quant-method int4 \
+  --cpuinfer-threads 60 \
+  --threadpool-count 2 \
+  --no-merge-safetensor
+```
+
+## Step 3: Launch SGLang Server
+
+Start the SGLang server with KT-Kernel integration for CPU-GPU heterogeneous inference.
+
+### Launch Command
+
+For single NVIDIA L20 48GB + 2-NUMA CPU system:
+
+```bash
+python -m sglang.launch_server \
+  --host 0.0.0.0 \
+  --port 30000 \
+  --model /path/to/deepseek-v3.2 \
+  --kt-weight-path /path/to/deepseek-v3.2-INT4 \
+  --kt-cpuinfer 60 \
+  --kt-threadpool-count 2 \
+  --kt-num-gpu-experts 1 \
+  --attention-backend triton \
+  --trust-remote-code \
+  --mem-fraction-static 0.98 \
+  --chunked-prefill-size 4096 \
+  --max-running-requests 32 \
+  --max-total-tokens 40000 \
+  --served-model-name DeepSeek-V3.2 \
+  --enable-mixed-chunk \
+  --tensor-parallel-size 1 \
+  --enable-p2p-check \
+  --disable-shared-experts-fusion \
+  --kt-method AMXINT4
+```
+
+### Resource Usage
+
+- **GPU VRAM:** ~27GB (for 1 GPU expert per layer + attention)
+- **System RAM:** ~350GB (for INT4 quantized CPU experts)
+
+## Step 4: Send Inference Requests
+
+Once the server is running, you can send inference requests using the OpenAI-compatible API.
+
+### Basic Chat Completion Request
+
+```bash
+curl -s http://localhost:30000/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "DeepSeek-V3.2",
+    "stream": false,
+    "messages": [
+      {"role": "user", "content": "hi"}
+    ]
+  }'
+```
+
+### Example Response
+
+```json
+{
+  "id": "adbb44f6aafb4b58b167e42fbbb1eed3",
+  "object": "chat.completion",
+  "created": 1764675126,
+  "model": "DeepSeek-V3.2",
+  "choices": [
+    {
+      "index": 0,
+      "message": {
+        "role": "assistant",
+        "content": "Hi there! 👋 \n\nThanks for stopping by! How can I help you today? Feel free to ask me anything - I'm here to assist with questions, explanations, conversations, or whatever you need! 😊\n\nIs there something specific on your mind, or would you like to know more about what I can do?",
+        "reasoning_content": null,
+        "tool_calls": null
+      },
+      "logprobs": null,
+      "finish_reason": "stop",
+      "matched_stop": 1
+    }
+  ],
+  "usage": {
+    "prompt_tokens": 5,
+    "total_tokens": 72,
+    "completion_tokens": 67,
+    "prompt_tokens_details": null,
+    "reasoning_tokens": 0
+  },
+  "metadata": {
+    "weight_version": "default"
+  }
+}
+```
+
+## Additional Resources
+
+- [KT-Kernel Documentation](../../../kt-kernel/README.md)
+- [DeepSeek V3.2 Model Card](https://huggingface.co/deepseek-ai/DeepSeek-V3.2)
+- [SGLang GitHub](https://github.com/sgl-project/sglang)