---
title: 定义
description: "```"
url: https://www.hiascend.com/document/detail/zh/canncommercial/latest/API/ascendtb/ascendtb_01_0195.html
sourcePath: /source/zh/canncommercial/900/API/ascendtb/ascendtb_01_0195.html
indexId: c0b37625c0a1fc74c1ddd43a541e37074a6e66c75e8392b4ce1dda1844bf966f64
---
# 定义

```
struct PagedAttentionParam {
    int32_t headNum = 0;
    float qkScale = 1.0;
    int32_t kvHeadNum = 0;
    enum MaskType : int {
        UNDEFINED = 0,          
        MASK_TYPE_NORM,         
        MASK_TYPE_ALIBI,      
        MASK_TYPE_SPEC,
        MASK_TYPE_MASK_FREE
    };
    MaskType maskType = UNDEFINED;
    bool batchRunStatusEnable = false;
    enum QuantType : int {
        TYPE_QUANT_UNDEFINED = 0,
        TYPE_QUANT_UNQUANT = 0, 
        TYPE_DEQUANT_FUSION,       
        TYPE_QUANT_QKV_OFFLINE,  
        TYPE_QUANT_QKV_ONLINE   
    };
    QuantType quantType = TYPE_QUANT_UNQUANT;
    aclDataType outDataType = ACL_DT_UNDEFINED;
    bool hasQuantOffset = false;
    enum CompressType : int {
        COMPRESS_TYPE_UNDEFINED = 0,  
        COMPRESS_TYPE_KVHEAD,          
        COMPRESS_TYPE_KVHEAD_ROPE,     
        COMPRESS_TYPE_MAX              
    };
    CompressType compressType = COMPRESS_TYPE_UNDEFINED;
    enum CalcType : int {
        CALC_TYPE_UNDEFINED = 0,  
        CALC_TYPE_SPEC           
    };
    CalcType calcType = CALC_TYPE_UNDEFINED;
    enum ScaleType : int {
        SCALE_TYPE_TOR = 0,      
        SCALE_TYPE_LOGN,        
        SCALE_TYPE_MAX           
    };
    ScaleType scaleType = SCALE_TYPE_TOR;
    InputLayout inputLayout = TYPE_BSND;
    uint32_t mlaVHeadSize = 0;
    float qScale = 1;    
    uint8_t rsv[64] = {0};
};
```