# InternVL3.5(InternVL3_5-38B/241B-A28B)

## 1 Introduction

[InternVL3.5](https://huggingface.co/papers/2508.18265), a new family of open-source multimodal models that significantly advances versatility, reasoning capability, and inference efficiency along the InternVL series.

The `InternVL3.5` model is first supported in `vllm-ascend:v0.20.2`

This document will show the main verification steps of both `InternVL3_5-38B` and `InternVL3_5-241B-A28B` model, including supported features, feature configuration, environment preparation, single-node and multi-node deployment, accuracy and performance evaluation.

## 2 Supported Features

Refer to [supported features](../../user_guide/support_matrix/supported_models.md) to get the model's supported feature matrix.

Refer to [feature guide](../../user_guide/feature_guide/index.md) to get the feature's configuration.

## 3 Prerequisites

### 3.1 Model Weight

require 1 Atlas 800 A3 (64G × 16) node:

- `InternVL3_5-38B-w8a8`: requires 1 Atlas 800 A3 (64GB × 16) node [Download model weight](https://modelscope.cn/models/Eco-Tech/InternVL3_5-38B)
- `InternVL3_5-241B-A28B-w8a8`: requires 1 Atlas 800 A3 (64GB × 16) node [Download model weight](https://huggingface.co/OpenGVLab/InternVL3_5-241B-A28B)

## 4 Installation

### 4.1 Docker Image Installation

You can use our official docker image to run InternVL3_5 directly.

``` bash
export IMAGE=quay.io/ascend/vllm-ascend:{{ vllm_ascend_version }}-a3
export NAME=vllm-ascend

# Run the container using the defined variables
# Note: If you are running bridge network with docker, please expose available ports for multiple nodes communication in advance
docker run --rm \
--name $NAME \
--net=host \
--shm-size=1g \
--device /dev/davinci0 \
--device /dev/davinci1 \
--device /dev/davinci2 \
--device /dev/davinci3 \
--device /dev/davinci4 \
--device /dev/davinci5 \
--device /dev/davinci6 \
--device /dev/davinci7 \
--device /dev/davinci8 \
--device /dev/davinci9 \
--device /dev/davinci10 \
--device /dev/davinci11 \
--device /dev/davinci12 \
--device /dev/davinci13 \
--device /dev/davinci14 \
--device /dev/davinci15 \
--device /dev/davinci_manager \
--device /dev/devmm_svm \
--device /dev/hisi_hdc \
-v /usr/local/dcmi:/usr/local/dcmi \
-v /usr/local/Ascend/driver/tools/hccn_tool:/usr/local/Ascend/driver/tools/hccn_tool \
-v /usr/local/bin/npu-smi:/usr/local/bin/npu-smi \
-v /usr/local/Ascend/driver/lib64/:/usr/local/Ascend/driver/lib64/ \
-v /usr/local/Ascend/driver/version.info:/usr/local/Ascend/driver/version.info \
-v /etc/ascend_install.info:/etc/ascend_install.info \
-v /root/.cache:/root/.cache \
-it $IMAGE bash
```

To verify the successful installation of the environment, please refer to [installation](../../installation.md).

### 4.2 Source Code Installation

In addition, if you don't want to use the docker image as above, you can also build all from source:

- Install `vllm-ascend` from source, refer to [installation](../../installation.md).

If you want to deploy multi-node environment, you need to set up environment on each node.

## 5 Online Service Deployment

### 5.1 Single-Node Online Deployment

=== "InternVL3_5-38B"

    - Quantized model `InternVL3_5-38B-w8a8` can be deployed on 1 Atlas 800 A3 (64G × 16) .

    Run the following script to execute online inference.

    Common Issues Tip: If you encounter issues, Refer to [FAQs](../../faqs.md).

    ```bash
    echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
    sysctl -w vm.swappiness=0
    sysctl -w kernel.numa_balancing=0
    sysctl -w kernel.sched_migration_cost_ns=50000

    export VLLM_ASCEND_ENABLE_FLASHCOMM1=1
    export VLLM_ASCEND_ENABLE_FUSED_MC2=1
    export PYTORCH_NPU_ALLOC_CONF=expandable_segments:True
    export TASK_QUEUE_ENABLE=1
    export HCCL_OP_EXPANSION_MODE="AIV"
    export OMP_PROC_BIND=false
    export OMP_NUM_THREADS=1
    export VLLM_USE_V1=1
    export VLLM_TORCH_PROFILER_WITH_STACK=0
    export HCCL_BUFFSIZE=1536

    vllm serve /root/.cache/modelscope/hub/models/vllm-ascend/InternVL3_5-38B-w8a8/ \
        --port 2002 \
        --served-model-name internvl3_5 \
        --trust-remote-code \
        --async-scheduling \
        --max-model-len 40960 \
        --max-num-batched-tokens 16384 \
        --tensor-parallel-size 4 \
        --max-num-seqs 32 \
        --gpu-memory-utilization 0.9 \
        --async-scheduling \
        --compilation-config '{"cudagraph_mode":"FULL_DECODE_ONLY", "cudagraph_capture_sizes":[4,32,64,128,192,256,512]}' \
        --additional-config '{"enable_weight_nz_layout": true, "enable_cpu_binding": true}' \
        --mm-processor-cache-gb 0 \
        --enable-chunked-prefill \
        --safetensors-load-strategy 'prefetch' \
        --allowed-local-media-path "/"

    ```

=== "InternVL3_5-241B-A28B"

    - Quantized model `InternVL3_5-241B-A28B-w8a8` can be deployed on 1 Atlas 800 A3 (64G × 16) .

    Run the following script to execute online inference.

    Common Issues Tip: If you encounter issues, Refer to [FAQs](../../faqs.md).

    ```bash
    echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
    sysctl -w vm.swappiness=0
    sysctl -w kernel.numa_balancing=0
    sysctl -w kernel.sched_migration_cost_ns=50000

    export VLLM_ASCEND_ENABLE_FLASHCOMM1=1
    export VLLM_ASCEND_ENABLE_FUSED_MC2=1
    export PYTORCH_NPU_ALLOC_CONF=expandable_segments:True
    export TASK_QUEUE_ENABLE=1
    export HCCL_OP_EXPANSION_MODE="AIV"
    export OMP_PROC_BIND=false
    export OMP_NUM_THREADS=1
    export VLLM_USE_V1=1
    export VLLM_TORCH_PROFILER_WITH_STACK=0
    export HCCL_BUFFSIZE=1536

    vllm serve /root/.cache/modelscope/hub/models/vllm-ascend/InternVL3_5-241B-A28B-w8a8/ \
        --port 2001 \
        --served-model-name internvl3_5 \
        --trust-remote-code \
        --async-scheduling \
        --max-model-len 40960 \
        --max-num-batched-tokens 4096 \
        --tensor-parallel-size 4 \
        --data-parallel-size 2 \
        --max-num-seqs 70 \
        --gpu-memory-utilization 0.9 \
        --async-scheduling \
        --compilation-config '{"cudagraph_mode":"FULL_DECODE_ONLY"}' \
        --additional-config '{"enable_weight_nz_layout": true, "enable_cpu_binding": true}' \
        --mm-processor-cache-gb 0 \
        --enable-chunked-prefill \
        --enable-expert-parallel \
        --safetensors-load-strategy 'prefetch' \
        --allowed-local-media-path "/"
    ```

**Notice:**

Some configurations for optimization are shown below:

- `VLLM_ASCEND_ENABLE_FLASHCOMM1`: Enable FlashComm optimization to reduce communication and computation overhead on prefill node. With FlashComm enabled, layer_sharding list cannot include o_proj as an element.
- `VLLM_ASCEND_ENABLE_FUSED_MC2`: Enable the dispatch_ffn_combine/mega_moe fused operator.
- The above parameters are validated in a specific test environment for reference only. Please adjust `--max-model-len`, `--max-num-seqs`, `--max-num-batched-tokens`, and `--gpu-memory-utilization` based on your actual input/output length, concurrency, and hardware configuration.
- For Ascend-specific options passed through `--additional-config`, refer to [Additional Configuration](../../user_guide/configuration/additional_config.md). For Ascend-specific environment variables, refer to [Environment Variables](../../user_guide/configuration/env_vars.md).

### 5.2 Multi-Node PD Separation Deployment

Not support yet.

## 6 Functional Verification

Once your server is started, you can query the model with input prompts:

```bash
curl http://localhost:8000/v1/chat/completions \
    -H "Content-Type: application/json" \
    -d '{
    "model": "internvl3_5",
    "messages": [
    {"role": "system", "content": "You are a helpful assistant."},
    {"role": "user", "content": [
        {"type": "image_url", "image_url": {"url": "https://modelscope.oss-cn-beijing.aliyuncs.com/resource/tiger.jpeg"}},
        {"type": "text", "text": "What is the text in the illustration?"}
    ]}
    ]
    }'
```

Expected Result:

```bash
{"id":"chatcmpl-d3270d4a16cb4b98936f71ee3016451f","object":"chat.completion","created":1764924127,"model":"internvl3_5","choices":[{"index":0,"message":{"role":"assistant","content":"The text in the illustration is: **a tiger**","refusal":null,"annotations":null,"audio":null,"function_call":null,"tool_calls":[],"reasoning_content":null},"logprobs":null,"finish_reason":"stop","stop_reason":null,"token_ids":null}],"service_tier":null,"system_fingerprint":null,"usage":{"prompt_tokens":107,"total_tokens":123,"completion_tokens":16,"prompt_tokens_details":null},"prompt_logprobs":null,"prompt_token_ids":null,"kv_transfer_params":null}
```

## 7 Accuracy Evaluation

### 7.1 Using AISBench

1. Refer to [Using AISBench](../../developer_guide/evaluation/using_ais_bench.md) for details.

2. After execution, you can get the result.

## 8 Performance Evaluation

### 8.1 Using AISBench

Refer to [Using AISBench for performance evaluation](../../developer_guide/evaluation/using_ais_bench.md#execute-performance-evaluation) for details.

### 8.2 Using vLLM Benchmark

Refer to [vllm benchmark](https://docs.vllm.ai/en/latest/benchmarking/) for more details.

## 9 Performance Tuning

### 9.1 Recommended Configurations

#### Table 1: Scenario Overview

| Scenario | Deployment Mode | *Total NPUs | Weight Version | Key Considerations |
| ---------- | ---------------- | ------------- | ---------------- | ------------------------ |
| InternVL3_5-241B-A28B-w8a8 High Throughput | Single node deployment | 8 (A3) | InternVL3_5-241B-A28B-w8a8 | For short-sequence high throughput, try tp4dp2 |
| InternVL3_5-38B-w8a8 High Throughput | Single node deployment | 4 (A3) | InternVL3_5-38B-w8a8 | For short-sequence high throughput, try tp4 |

#### Table 2: Detailed Node Configuration

|Scenario|Configuration|NPUs|TP|DP|Max Num Seqs|Max Num Batched Tokens|Max Model Len|
|--------|-------------|-----|--|--|------------|----------------------|--------------|
|Single-Node (A3)|InternVL3_5-38B-w8a8 High Throughput|2|4|1|32|16384|135000|
|Single-Node (A3)|InternVL3_5-241B-A28B-w8a8 High Throughput|4|4|2|32|4096|40960|

### 9.2 Tuning Guidelines

Please refer to the [Public Performance Tuning Documentation](../../developer_guide/performance_and_debug/optimization_and_tuning.md) for tuning methods.
Please refer to the [Feature Guide](../../user_guide/support_matrix/feature_matrix.md) for detailed feature descriptions.

## 9 FAQ

- Common Issues Tip: If you encounter issues, Refer to [FAQs](../../faqs.md).