GetAscendAntiQuantMaxMinTmpSize

Function Usage

To perform AscendAntiQuant computation in the kernel, developers need to reserve or allocate the temporary space. This API is used to obtain the maximum and minimum sizes of the temporary space to be reserved or allocated on the host. Developers can select a proper size within this range as the tiling parameter and pass it to the kernel.

To ensure correct functions, the temporary space to be reserved or allocated cannot be less than the minimum temporary space.
Within the range from the minimum to the maximum, as the temporary space increases, the API compute performance in the kernel can be optimized to some extent. To achieve better performance, reserve or allocate the space based on the actual buffer usage.

Prototype

      
           void GetAscendAntiQuantMaxMinTmpSize(const ge::Shape& srcShape, const ge::Shape& scaleShape, bool isTranspose, ge::DataType inputDataType, ge::DataType outputDataType, uint32_t& maxValue, uint32_t& minValue)

      
           uint32_t GetAscendAntiQuantMaxTmpSize(const ge::Shape& srcShape, const ge::Shape& scaleShape, bool isTranspose, ge::DataType inputDataType, ge::DataType outputDataType)

      
           uint32_t GetAscendAntiQuantMinTmpSize(const ge::Shape& srcShape, const ge::Shape& scaleShape, bool isTranspose, ge::DataType inputDataType, ge::DataType outputDataType)

Parameters

**Table 1** API parameters
Parameter	Input/Output	Description
srcShape	Input	Shape of the input src.
scaleShape	Input	Shape of the input scale.
isTranspose	Input	Whether to apply transposing.
inputDataType	Input	Input data type. The value is ge::DataType. For details about the definition of this type, see DataType.
outputDataType	Input	Output data type. The value is ge::DataType. For details about the definition of this type, see DataType.
maxValue	Output	Maximum size of the temporary space required by AscendAntiQuant computation. Any space exceeding this value will not be utilized by the API. Within the range from the minimum to the maximum, as the temporary space increases, the API compute performance in the kernel can be optimized to some extent. To achieve better performance, reserve or allocate the space based on the actual buffer usage. If the maximum space size is 0, no temporary space is required. NOTE: maxValue is for reference only and may be larger than the remaining space of the Unified Buffer. In this case, select a proper temporary space size based on the remaining space of the Unified Buffer.
minValue	Output	Minimum size of the temporary space required by AscendAntiQuant computation. To ensure correct functions, the size of the temporary space to be reserved or allocated during API computation cannot be less than the value of this parameter. If the minimum space size is 0, no temporary space is required.

Returns

GetAscendAntiQuantMaxMinTmpSize: none

GetAscendAntiQuantMaxTmpSize: maximum temporary space required by AscendAntiQuant computation

GetAscendAntiQuantMinTmpSize: minimum temporary space required by AscendAntiQuant computation

Constraints

None

Examples

      
           uint32_t maxValue = 0;
uint32_t minValue = 0;
std::vector<int64_t> srcDims = { 64, 512 };
auto srcShape = ge::Shape(srcDims);
std::vector<int64_t> scaleDims = { 1, 512 };
auto scaleShape = ge::Shape(scaleDims);
bool isTranspose = false;
AscendC::GetAscendAntiQuantMaxMinTmpSize(srcShape, scaleShape, isTranspose, ge::DT_INT8, ge::DT_BF16, maxValue, minValue);

Parent topic: Quantization