MatmulGetTmpBufSize

Function

Obtains the used L1 Buffer, Unified Buffer, or L0C Buffer size based on the tiling structure information after the GetTiling API is called to obtain the tiling parameters of the multi-core Matmul.

Prototype

int32_t MatmulGetTmpBufSize(optiling::TCubeTiling &tiling, matmul_tiling::SysTilingTempBufSize &bufSize)

Parameters

Table 1 Parameters

Parameter

Input/Output

Description

tiling

Input

Single-core Matmul tiling structure, which is the TCubeTiling structure obtained by the MatmulTiling object.

bufSize

Output

Size of the L1 Buffer, Unified Buffer, or L0C Buffer used in the tiling.

The SysTilingTempBufSize structure is defined as follows:

struct SysTilingTempBufSize {
    int32_t ubSize = 0; // Size of the unified buffer
    int32_t l1Size = 0; // Size of the L1 buffer
    int32_t l0cSize = 0; // Size of the L0C buffer
};

Returns

-1: setting failed; 0: setting succeeded.

Restrictions

None

Example

auto ascendcPlatform = platform_ascendc::PlatformAscendC(context->GetPlatformInfo());
matmul_tiling::MatmulApiTiling tiling(ascendcPlatform); 
optiling::TCubeTiling tilingData;
...  // Initialize tilingData. For details, see the usage description of MatmulTiling APIs.
int ret = tiling.GetTiling(tilingData);    // Obtain tiling parameters.
SysTilingTempBufSize bufSize;
MatmulGetTmpBufSize(tilingData, bufSize);

Parent topic: Obtaining Space Required for Matmul Computation