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vLLM

Home
User Guide
User Guide
- Getting Started
  Getting Started
  - Quickstart
  - Installation
    
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- Examples
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- General
  General
- Inference and Serving
  Inference and Serving
  - Offline Inference
  - OpenAI-Compatible Server
  - Data Parallel Deployment
  - Troubleshooting distributed deployments
  - Expert Parallel Deployment
  - Parallelism and Scaling
  - Integrations
    Integrations
    
    LangChain
    
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- Deployment
  Deployment
  - Using Docker
  - Using Kubernetes
  - Using Nginx
  - Frameworks
    Frameworks
    
    Anyscale
    
    AnythingLLM
    
    AutoGen
    
    BentoML
    
    Cerebrium
    
    Chatbox
    
    Dify
    
    dstack
    
    Haystack
    
    Helm
    
    Hugging Face Inference Endpoints
    
    LiteLLM
    
    Lobe Chat
    
    LWS
    
    Modal
    
    Open WebUI
    
    Retrieval-Augmented Generation
    
    SkyPilot
    
    Streamlit
    
    NVIDIA Triton
  - Integrations
    Integrations
    
    KServe
    
    KubeAI
    
    KubeRay
    
    Llama Stack
    
    llmaz
    
    Production stack
- Training
  Training
  - Reinforcement Learning from Human Feedback
  - Transformers Reinforcement Learning
- Configuration
  Configuration
- Models
  Models
  - Supported Models
  - Generative Models
  - Pooling Models
  - Extensions
    Extensions
    
    Loading Model weights with fastsafetensors
    
    Loading models with Run:ai Model Streamer
    
    Loading models with CoreWeave's Tensorizer
  - Hardware Supported Models
    Hardware Supported Models
    
    TPU
- Features
  Features
Developer Guide
Developer Guide
- General
  General
- Model Implementation
  Model Implementation
- CI
  CI
  - CI Failures
  - Update PyTorch version on vLLM OSS CI/CD
- Design Documents
  Design Documents
API Reference
API Reference
- vllm
  vllm
  - beam_search
  - collect_env
  - connections
  - env_override
  - envs
  - forward_context
  - logger
  - logits_process
  - logprobs
  - outputs
  - pooling_params
  - sampling_params
  - scalar_type
  - scripts
  - sequence
  - tasks
  - test_utils
  - tracing
  - version
  - assets
    
    assets
    
    audio
    
    base
    
    image
    
    video
  - attention
    
    attention
    
    layer
    
    selector
    
    backends
    
    backends
    
    abstract
    
    utils
    
    layers
    
    layers
    
    chunked_local_attention
    
    cross_attention
    
    encoder_only_attention
    
    ops
    
    ops
    
    chunked_prefill_paged_decode
    
    common
    
    flashmla
    
    merge_attn_states
    
    paged_attn
    
    pallas_kv_cache_update
    
    prefix_prefill
    
    rocm_aiter_mla
    
    rocm_aiter_paged_attn
    
    triton_decode_attention
    
    triton_flash_attention
    
    triton_merge_attn_states
    
    triton_reshape_and_cache_flash
    
    triton_unified_attention
    
    utils
    
    utils
    
    fa_utils
    
    kv_sharing_utils
  - benchmarks
    
    benchmarks
    
    datasets
    
    latency
    
    serve
    
    throughput
    
    lib
    
    lib
    
    endpoint_request_func
    
    ready_checker
    
    utils
  - compilation
    
    compilation
    
    activation_quant_fusion
    
    backends
    
    base_static_graph
    
    collective_fusion
    
    compiler_interface
    
    counter
    
    cuda_graph
    
    decorators
    
    fix_functionalization
    
    fusion
    
    fusion_attn
    
    fx_utils
    
    inductor_pass
    
    monitor
    
    noop_elimination
    
    pass_manager
    
    piecewise_backend
    
    post_cleanup
    
    sequence_parallelism
    
    torch25_custom_graph_pass
    
    vllm_inductor_pass
    
    wrapper
  - config
    
    config
    
    cache
    
    compilation
    
    device
    
    kv_events
    
    kv_transfer
    
    load
    
    lora
    
    model
    
    multimodal
    
    observability
    
    parallel
    
    pooler
    
    scheduler
    
    speculative
    
    speech_to_text
    
    structured_outputs
    
    utils
    
    vllm
  - device_allocator
    
    device_allocator
    
    cumem
  - distributed
    
    distributed
    
    communication_op
    
    kv_events
    
    parallel_state
    
    tpu_distributed_utils
    
    utils
    
    device_communicators
    
    device_communicators
    
    all2all
    
    all_reduce_utils
    
    base_device_communicator
    
    cpu_communicator
    
    cuda_communicator
    
    cuda_wrapper
    
    custom_all_reduce
    
    mnnvl_compat
    
    pynccl
    
    pynccl_allocator
    
    pynccl_wrapper
    
    quick_all_reduce
    
    ray_communicator
    
    shm_broadcast
    
    shm_object_storage
    
    symm_mem
    
    tpu_communicator
    
    xpu_communicator
    
    eplb
    
    eplb
    
    eplb_state
    
    rebalance_algo
    
    rebalance_execute
    
    kv_transfer
    
    kv_transfer
    
    kv_transfer_state
    
    kv_connector
    
    kv_connector
    
    base
    
    factory
    
    utils
    
    v1
    
    v1
    
    base
    
    lmcache_connector
    
    metrics
    
    multi_connector
    
    nixl_connector
    
    offloading_connector
    
    shared_storage_connector
    
    p2p
    
    p2p
    
    p2p_nccl_connector
    
    p2p_nccl_engine
    
    tensor_memory_pool
    
    kv_lookup_buffer
    
    kv_lookup_buffer
    
    base
    
    mooncake_store
    
    simple_buffer
    
    kv_pipe
    
    kv_pipe
    
    base
    
    mooncake_pipe
    
    pynccl_pipe
  - engine
    
    engine
    
    arg_utils
    
    async_llm_engine
    
    llm_engine
    
    metrics
    
    metrics_types
    
    protocol
  - entrypoints
    
    entrypoints
    
    api_server
    
    chat_utils
    
    constants
    
    context
    
    harmony_utils
    
    launcher
    
    llm
    
    logger
    
    renderer
    
    score_utils
    
    ssl
    
    tool
    
    tool_server
    
    utils
    
    cli
    
    cli
    
    collect_env
    
    main
    
    openai
    
    run_batch
    
    serve
    
    types
    
    benchmark
    
    benchmark
    
    base
    
    latency
    
    main
    
    serve
    
    throughput
    
    openai
    
    openai
    
    api_server
    
    cli_args
    
    logits_processors
    
    protocol
    
    run_batch
    
    serving_chat
    
    serving_classification
    
    serving_completion
    
    serving_embedding
    
    serving_engine
    
    serving_models
    
    serving_pooling
    
    serving_responses
    
    serving_score
    
    serving_tokenization
    
    serving_transcription
    
    speech_to_text
    
    tool_parsers
    
    tool_parsers
    
    abstract_tool_parser
    
    deepseekv3_tool_parser
    
    deepseekv31_tool_parser
    
    glm4_moe_tool_parser
    
    granite_20b_fc_tool_parser
    
    granite_tool_parser
    
    hermes_tool_parser
    
    hunyuan_a13b_tool_parser
    
    internlm2_tool_parser
    
    jamba_tool_parser
    
    kimi_k2_tool_parser
    
    llama4_pythonic_tool_parser
    
    llama_tool_parser
    
    longcat_tool_parser
    
    minimax_tool_parser
    
    mistral_tool_parser
    
    openai_tool_parser
    
    phi4mini_tool_parser
    
    pythonic_tool_parser
    
    qwen3coder_tool_parser
    
    qwen3xml_tool_parser
    
    seed_oss_tool_parser
    
    step3_tool_parser
    
    utils
    
    xlam_tool_parser
  - executor
    
    executor
    
    executor_base
    
    msgspec_utils
    
    ray_distributed_executor
    
    ray_utils
    
    uniproc_executor
  - inputs
    
    inputs
    
    data
    
    parse
    
    preprocess
  - logging_utils
    
    logging_utils
    
    dump_input
    
    formatter
    
    log_time
  - lora
    
    lora
    
    lora_weights
    
    models
    
    peft_helper
    
    request
    
    resolver
    
    utils
    
    worker_manager
    
    layers
    
    layers
    
    base
    
    base_linear
    
    column_parallel_linear
    
    logits_processor
    
    qkv_x_parallel_linear
    
    replicated_linear
    
    row_parallel_linear
    
    utils
    
    vocal_parallel_embedding
    
    ops
    
    ops
    
    ipex_ops
    
    ipex_ops
    
    lora_ops
    
    torch_ops
    
    torch_ops
    
    lora_ops
    
    triton_ops
    
    triton_ops
    
    kernel_utils
    
    lora_expand_op
    
    lora_kernel_metadata
    
    lora_shrink_op
    
    utils
    
    xla_ops
    
    xla_ops
    
    lora_ops
    
    punica_wrapper
    
    punica_wrapper
    
    punica_base
    
    punica_cpu
    
    punica_gpu
    
    punica_selector
    
    punica_tpu
    
    punica_xpu
    
    utils
  - model_executor
    
    model_executor
    
    custom_op
    
    parameter
    
    utils
    
    layers
    
    layers
    
    activation
    
    attention_layer_base
    
    batch_invariant
    
    layernorm
    
    lightning_attn
    
    linear
    
    logits_processor
    
    mla
    
    pooler
    
    resampler
    
    utils
    
    vocab_parallel_embedding
    
    fla
    
    fla
    
    ops
    
    ops
    
    chunk
    
    chunk_delta_h
    
    chunk_o
    
    chunk_scaled_dot_kkt
    
    cumsum
    
    fused_recurrent
    
    index
    
    l2norm
    
    layernorm_guard
    
    op
    
    solve_tril
    
    utils
    
    wy_fast
    
    fused_moe
    
    fused_moe
    
    batched_deep_gemm_moe
    
    batched_triton_or_deep_gemm_moe
    
    config
    
    cpu_fused_moe
    
    cutlass_moe
    
    deep_gemm_moe
    
    deep_gemm_utils
    
    deepep_ht_prepare_finalize
    
    deepep_ll_prepare_finalize
    
    flashinfer_cutlass_moe
    
    flashinfer_cutlass_prepare_finalize
    
    flashinfer_trtllm_moe
    
    fused_batched_moe
    
    fused_marlin_moe
    
    fused_moe
    
    gpt_oss_triton_kernels_moe
    
    layer
    
    modular_kernel
    
    moe_align_block_size
    
    moe_pallas
    
    moe_permute_unpermute
    
    moe_torch_iterative
    
    pplx_prepare_finalize
    
    prepare_finalize
    
    rocm_aiter_fused_moe
    
    routing_simulator
    
    topk_weight_and_reduce
    
    triton_deep_gemm_moe
    
    trtllm_moe
    
    utils
    
    mamba
    
    mamba
    
    abstract
    
    linear_attn
    
    mamba_mixer
    
    mamba_mixer2
    
    mamba_utils
    
    short_conv
    
    ops
    
    ops
    
    causal_conv1d
    
    layernorm_gated
    
    mamba_ssm
    
    ssd_bmm
    
    ssd_chunk_scan
    
    ssd_chunk_state
    
    ssd_combined
    
    ssd_state_passing
    
    quantization
    
    quantization
    
    auto_round
    
    awq
    
    awq_marlin
    
    awq_triton
    
    base_config
    
    bitblas
    
    bitsandbytes
    
    deepspeedfp
    
    experts_int8
    
    fbgemm_fp8
    
    fp8
    
    gguf
    
    gptq
    
    gptq_bitblas
    
    gptq_marlin
    
    gptq_marlin_24
    
    hqq_marlin
    
    inc
    
    input_quant_fp8
    
    ipex_quant
    
    kv_cache
    
    modelopt
    
    moe_wna16
    
    mxfp4
    
    petit
    
    ptpc_fp8
    
    rtn
    
    schema
    
    torchao
    
    tpu_int8
    
    compressed_tensors
    
    compressed_tensors
    
    compressed_tensors
    
    compressed_tensors_moe
    
    triton_scaled_mm
    
    utils
    
    schemes
    
    schemes
    
    compressed_tensors_24
    
    compressed_tensors_scheme
    
    compressed_tensors_w4a4_nvfp4
    
    compressed_tensors_w4a8_fp8
    
    compressed_tensors_w4a8_int
    
    compressed_tensors_w4a16_24
    
    compressed_tensors_w4a16_nvfp4
    
    compressed_tensors_w8a8_fp8
    
    compressed_tensors_w8a8_int8
    
    compressed_tensors_w8a16_fp8
    
    compressed_tensors_wNa16
    
    transform
    
    transform
    
    linear
    
    module
    
    utils
    
    schemes
    
    schemes
    
    linear_qutlass_nvfp4
    
    kernels
    
    kernels
    
    mixed_precision
    
    mixed_precision
    
    allspark
    
    bitblas
    
    conch
    
    cutlass
    
    dynamic_4bit
    
    exllama
    
    MPLinearKernel
    
    machete
    
    marlin
    
    scaled_mm
    
    scaled_mm
    
    aiter
    
    cpu
    
    cutlass
    
    ScaledMMLinearKernel
    
    triton
    
    xla
    
    quark
    
    quark
    
    quark
    
    quark_moe
    
    utils
    
    schemes
    
    schemes
    
    quark_scheme
    
    quark_w4a4_mxfp4
    
    quark_w8a8_fp8
    
    quark_w8a8_int8
    
    utils
    
    utils
    
    allspark_utils
    
    bitblas_utils
    
    flashinfer_fp4_moe
    
    flashinfer_utils
    
    fp8_utils
    
    gptq_utils
    
    int8_utils
    
    layer_utils
    
    machete_utils
    
    marlin_utils
    
    marlin_utils_fp4
    
    marlin_utils_fp8
    
    marlin_utils_test
    
    marlin_utils_test_24
    
    mxfp4_utils
    
    mxfp8_utils
    
    nvfp4_emulation_utils
    
    nvfp4_moe_support
    
    petit_utils
    
    quant_utils
    
    w8a8_utils
    
    rotary_embedding
    
    rotary_embedding
    
    base
    
    common
    
    deepseek_scaling_rope
    
    dual_chunk_rope
    
    dynamic_ntk_alpha_rope
    
    dynamic_ntk_scaling_rope
    
    ernie45_vl_rope
    
    linear_scaling_rope
    
    llama3_rope
    
    llama4_vision_rope
    
    mrope
    
    ntk_scaling_rope
    
    phi3_long_rope_scaled_rope
    
    rocm_aiter_rope_ops
    
    yarn_scaling_rope
    
    shared_fused_moe
    
    shared_fused_moe
    
    shared_fused_moe
    
    model_loader
    
    model_loader
    
    base_loader
    
    bitsandbytes_loader
    
    default_loader
    
    dummy_loader
    
    gguf_loader
    
    runai_streamer_loader
    
    sharded_state_loader
    
    tensorizer
    
    tensorizer_loader
    
    tpu
    
    utils
    
    weight_utils
    
    models
    
    models
    
    adapters
    
    aimv2
    
    apertus
    
    arcee
    
    arctic
    
    aria
    
    aya_vision
    
    baichuan
    
    bailing_moe
    
    bamba
    
    bert
    
    bert_with_rope
    
    blip
    
    blip2
    
    bloom
    
    chameleon
    
    chatglm
    
    clip
    
    cohere2_vision
    
    commandr
    
    config
    
    dbrx
    
    deepseek
    
    deepseek_eagle
    
    deepseek_mtp
    
    deepseek_v2
    
    deepseek_vl2
    
    dots1
    
    dots_ocr
    
    ernie45
    
    ernie45_moe
    
    ernie45_vl
    
    ernie45_vl_moe
    
    ernie_mtp
    
    exaone
    
    exaone4
    
    fairseq2_llama
    
    falcon
    
    falcon_h1
    
    fuyu
    
    gemma
    
    gemma2
    
    gemma3
    
    gemma3_mm
    
    gemma3n
    
    gemma3n_mm
    
    glm
    
    glm4
    
    glm4_1v
    
    glm4_moe
    
    glm4_moe_mtp
    
    glm4v
    
    gpt2
    
    gpt_bigcode
    
    gpt_j
    
    gpt_neox
    
    gpt_oss
    
    granite
    
    granite_speech
    
    granitemoe
    
    granitemoehybrid
    
    granitemoeshared
    
    gritlm
    
    grok1
    
    h2ovl
    
    hunyuan_v1
    
    hyperclovax_vision
    
    idefics2_vision_model
    
    idefics3
    
    interfaces
    
    interfaces_base
    
    intern_vit
    
    internlm2
    
    internlm2_ve
    
    interns1
    
    interns1_vit
    
    internvl
    
    jais
    
    jamba
    
    jina_vl
    
    keye
    
    keye_vl1_5
    
    kimi_vl
    
    lfm2
    
    llama
    
    llama4
    
    llama4_eagle
    
    llama_eagle
    
    llama_eagle3
    
    llava
    
    llava_next
    
    llava_next_video
    
    llava_onevision
    
    longcat_flash
    
    longcat_flash_mtp
    
    mamba
    
    mamba2
    
    medusa
    
    midashenglm
    
    mimo
    
    mimo_mtp
    
    minicpm
    
    minicpm3
    
    minicpm_eagle
    
    minicpmo
    
    minicpmv
    
    minimax_text_01
    
    minimax_vl_01
    
    mistral3
    
    mixtral
    
    mllama4
    
    mlp_speculator
    
    modernbert
    
    module_mapping
    
    molmo
    
    moonvit
    
    mpt
    
    nano_nemotron_vl
    
    nemotron
    
    nemotron_h
    
    nemotron_nas
    
    nemotron_vl
    
    nvlm_d
    
    olmo
    
    olmo2
    
    olmoe
    
    opt
    
    orion
    
    ovis
    
    ovis2_5
    
    paligemma
    
    persimmon
    
    phi
    
    phi3
    
    phi3v
    
    phi4_multimodal
    
    phi4mm
    
    phi4mm_audio
    
    phi4mm_utils
    
    phimoe
    
    pixtral
    
    plamo2
    
    qwen
    
    qwen2
    
    qwen2_5_omni_thinker
    
    qwen2_5_vl
    
    qwen2_audio
    
    qwen2_moe
    
    qwen2_rm
    
    qwen2_vl
    
    qwen3
    
    qwen3_moe
    
    qwen3_next
    
    qwen3_next_mtp
    
    qwen3_vl
    
    qwen3_vl_moe
    
    qwen_vl
    
    radio
    
    registry
    
    roberta
    
    rvl
    
    seed_oss
    
    siglip
    
    siglip2navit
    
    skyworkr1v
    
    smolvlm
    
    solar
    
    stablelm
    
    starcoder2
    
    step3_text
    
    step3_vl
    
    swin
    
    tarsier
    
    telechat2
    
    teleflm
    
    terratorch
    
    transformers
    
    ultravox
    
    utils
    
    vision
    
    voxtral
    
    whisper
    
    zamba2
    
    warmup
    
    warmup
    
    deep_gemm_warmup
    
    kernel_warmup
  - multimodal
    
    multimodal
    
    audio
    
    base
    
    cache
    
    evs
    
    hasher
    
    image
    
    inputs
    
    parse
    
    processing
    
    profiling
    
    registry
    
    utils
    
    video
  - platforms
    
    platforms
    
    cpu
    
    cuda
    
    interface
    
    rocm
    
    tpu
    
    xpu
  - plugins
    
    plugins
    
    io_processors
    
    io_processors
    
    interface
    
    lora_resolvers
    
    lora_resolvers
    
    filesystem_resolver
  - profiler
    
    profiler
    
    layerwise_profile
    
    utils
  - ray
    
    ray
    
    lazy_utils
    
    ray_env
  - reasoning
    
    reasoning
    
    abs_reasoning_parsers
    
    basic_parsers
    
    deepseek_r1_reasoning_parser
    
    glm4_moe_reasoning_parser
    
    gptoss_reasoning_parser
    
    granite_reasoning_parser
    
    hunyuan_a13b_reasoning_parser
    
    mistral_reasoning_parser
    
    qwen3_reasoning_parser
    
    seedoss_reasoning_parser
    
    step3_reasoning_parser
  - transformers_utils
    
    transformers_utils
    
    config
    
    config_parser_base
    
    detokenizer_utils
    
    dynamic_module
    
    processor
    
    runai_utils
    
    s3_utils
    
    tokenizer
    
    tokenizer_base
    
    utils
    
    chat_templates
    
    chat_templates
    
    registry
    
    configs
    
    configs
    
    arctic
    
    chatglm
    
    deepseek_v3
    
    deepseek_vl2
    
    dotsocr
    
    eagle
    
    falcon
    
    jais
    
    kimi_vl
    
    medusa
    
    midashenglm
    
    mistral
    
    mlp_speculator
    
    moonvit
    
    nemotron
    
    nemotron_h
    
    nemotron_vl
    
    olmo3
    
    ovis
    
    qwen3_next
    
    radio
    
    step3_vl
    
    ultravox
    
    speculators
    
    speculators
    
    algos
    
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vllm.attention.layers ¶

Modules:

Name	Description
`chunked_local_attention`
`cross_attention`
`encoder_only_attention`

September 30, 2025

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