aclnnLightningIndexer
产品支持情况
| 产品 | 是否支持 |
|---|---|
| Ascend 950PR/Ascend 950DT | × |
| Atlas A3 训练系列产品/Atlas A3 推理系列产品 | √ |
| Atlas A2 训练系列产品/Atlas A2 推理系列产品 | √ |
| Atlas 200I/500 A2 推理产品 | × |
| Atlas 推理系列产品 | × |
| Atlas 训练系列产品 | × |
功能说明
-
接口功能:
lightning_indexer基于一系列操作得到每一个token对应的Top-kk个位置。 -
计算公式:
Indices=Top-k{[1]1×g@[(W@[1]1×Sk)⊙ReLU(Qindex@KindexT)]}Indices=\text{Top-}k\left\{[1]_{1\times g}@\left[(W@[1]_{1\times S_{k}})\odot\text{ReLU}\left(Q_{index}@K_{index}^T\right)\right]\right\}
对于某个token对应的Index Query Qindex∈Rg×dQ_{index}\in\R^{g\times d},给定上下文Index Key Kindex∈RSk×d,W∈Rg×1K_{index}\in\R^{S_{k}\times d},W\in\R^{g\times 1},其中gg为GQA对应的group size,dd为每一个头的维度,SkS_{k}是上下文的长度。
函数原型
每个算子分为两段式接口,必须先调用“aclnnLightningIndexerGetWorkspaceSize”接口获取计算所需workspace大小以及包含了算子计算流程的执行器,再调用“aclnnLightningIndexer”接口执行计算。
aclnnStatus aclnnLightningIndexerGetWorkspaceSize(
const aclTensor *query,
const aclTensor *key,
const aclTensor *weights,
const aclTensor *actualSeqLengthsQueryOptional,
const aclTensor *actualSeqLengthsKeyOptional,
const aclTensor *blockTableOptional,
char *layoutQueryOptional,
char *layoutKeyOptional,
int64_t sparseCount,
int64_t sparseMode,
int64_t preTokens,
int64_t nextTokens,
bool returnValues,
const aclTensor *sparseIndicesOut,
const aclTensor *sparseValuesOut,
uint64_t *workspaceSize,
aclOpExecutor **executor)
aclnnStatus aclnnLightningIndexer(
void *workspace,
uint64_t workspaceSize,
aclOpExecutor *executor,
const aclrtStream stream)
aclnnLightningIndexerGetWorkspaceSize
- 参数说明:
Note
- query、key、weights参数维度含义:B(Batch Size)表示输入样本批量大小、S(Sequence Length)表示输入样本序列长度、H(Head Size)表示hidden层的大小、N(Head Num)表示多头数、D(Head Dim)表示hidden层最小的单元尺寸,且满足D=H/N、T表示所有Batch输入样本序列长度的累加和。
- S1表示query shape中的S,S2表示key shape中的S,T1表示query shape中的T,T2表示key shape中的T,N1表示query shape中的N,N2表示key shape中的N。
| 参数名 | 输入/输出 | 描述 | 使用说明 | 数据类型 | 数据格式 | 维度(shape) | 非连续Tensor |
|---|---|---|---|---|---|---|---|
| query | 输入 | 公式中的输入Q。 | 不支持空tensor。 | FLOAT16、BFLOAT16 | ND |
|
x |
| key | 输入 | 公式中的输入K。 |
|
FLOAT16、BFLOAT16 | ND |
|
x |
| weights | 输入 | 公式中的输入W。 | 不支持空tensor。 | FLOAT16、BFLOAT16、FLOAT | ND |
|
x |
| actualSeqLengthsQueryOptional | 输入 | 每个Batch中,Query的有效token数。 |
|
INT32 | ND | (B,) | x |
| actualSeqLengthsKeyOptional | 输入 | 每个Batch中,Key的有效token数。 |
|
INT32 | ND | (B,) | x |
| blockTableOptional | 输入 | 表示PageAttention中KV存储使用的block映射表。 |
|
INT32 | ND | shape支持(B,S2/block_size) | x |
| layoutQueryOptional | 输入 | 用于标识输入Query的数据排布格式。 |
|
STRING | - | - | - |
| layoutKeyOptional | 输入 | 用于标识输入Key的数据排布格式。 |
|
STRING | - | - | - |
| sparseCount | 输入 | topK阶段需要保留的block数量。 | 支持[1, 2048],以及3072、4096、5120、6144、7168、8192 | INT32 | - | - | - |
| sparseMode | 输入 | 表示sparse的模式。 |
|
INT32 | - | - | - |
| preTokens | 输入 | 用于稀疏计算,表示attention需要和前几个Token计算关联。 | 仅支持默认值2^63-1。 | INT64 | - | - | - |
| nextTokens | 输入 | 用于稀疏计算,表示attention需要和后几个Token计算关联。 | 仅支持默认值2^63-1。 | INT64 | - | - | - |
| returnValues | 输入 | 表示是否输出sparseValuesOut。 |
|
BOOL | - | - | - |
| sparseIndicesOut | 输出 | 公式中的Indices输出。 | 不支持空tensor。 | INT32 | - |
|
x |
| sparseValuesOut | 输出 | 公式中的Indices输出对应的value值。 | 不支持空tensor。 | FLOAT16、BFLOAT16 | ND | shape与sparseIndicesOut保持一致 | x |
| workspaceSize | 输出 | 返回需要在Device侧申请的workspace大小。 | - | - | - | - | - |
| executor | 输出 | 返回op执行器,包含了算子计算流程。 | - | - | - | - | - |
-
返回值:
aclnnStatus:返回状态码,具体参见aclnn返回码。
第一段接口会完成入参校验,出现以下场景时报错:
返回值 错误码 描述 ACLNN_ERR_PARAM_NULLPTR 161001 如果传入参数是必选输入,输出或者必选属性,且是空指针,则返回161001。 ACLNN_ERR_PARAM_INVALID 161002 query、key、weights、actualSeqLengthsQueryOptional、actualSeqLengthsKeyOptional、layoutQueryOptional、layoutKeyOptional、sparseCount、sparseMode、returnValues、sparseIndicesOut、sparseValuesOut的数据类型和数据格式不在支持的范围内。
aclnnLightningIndexer
-
参数说明:
参数名 输入/输出 描述 workspace 输入 在Device侧申请的workspace内存地址。 workspaceSize 输入 在Device侧申请的workspace大小,由第一段接口aclnnLightningIndexerGetWorkspaceSize获取。 executor 输入 op执行器,包含了算子计算流程。 stream 输入 指定执行任务的Stream。 -
返回值:
aclnnStatus:返回状态码,具体参见aclnn返回码。
约束说明
- 参数query中的N支持小于等于64,key的N支持1。
- headdim支持128。
- block_size取值为16的倍数,最大支持1024。
- 参数query、key的数据类型应保持一致。
- 参数weights不为
float32时,参数query、key、weights的数据类型应保持一致。
调用示例
示例代码如下,仅供参考,具体编译和执行过程请参考编译与运行样例。
/**
* Copyright (c) 2026 Huawei Technologies Co., Ltd.
* This program is free software, you can redistribute it and/or modify it under the terms and conditions of
* CANN Open Software License Agreement Version 2.0 (the "License").
* Please refer to the License for details. You may not use this file except in compliance with the License.
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
* See LICENSE in the root of the software repository for the full text of the License.
*/
/*!
* \file test_incre_flash_attention_v4.cpp
* \brief
*/
//testci
#include <iostream>
#include <vector>
#include <cmath>
#include <cstring>
#include "securec.h"
#include "acl/acl.h"
#include "aclnnop/aclnn_lightning_indexer.h"
using namespace std;
namespace {
#define CHECK_RET(cond) ((cond) ? true :(false))
#define LOG_PRINT(message, ...) \
do { \
(void)printf(message, ##__VA_ARGS__); \
} while (0)
int64_t GetShapeSize(const std::vector<int64_t>& shape) {
int64_t shapeSize = 1;
for (auto i : shape) {
shapeSize *= i;
}
return shapeSize;
}
int Init(int32_t deviceId, aclrtStream* stream) {
auto ret = aclInit(nullptr);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("aclInit failed. ERROR: %d\n", ret);
return ret;
}
ret = aclrtSetDevice(deviceId);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("aclrtSetDevice failed. ERROR: %d\n", ret);
return ret;
}
ret = aclrtCreateStream(stream);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("aclrtCreateStream failed. ERROR: %d\n", ret);
return ret;
}
return 0;
}
template <typename T>
int CreateAclTensor(const std::vector<T>& hostData, const std::vector<int64_t>& shape, void** deviceAddr,
aclDataType dataType, aclTensor** tensor) {
auto size = GetShapeSize(shape) * sizeof(T);
auto ret = aclrtMalloc(deviceAddr, size, ACL_MEM_MALLOC_HUGE_FIRST);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("aclrtMalloc failed. ERROR: %d\n", ret);
return ret;
}
ret = aclrtMemcpy(*deviceAddr, size, hostData.data(), size, ACL_MEMCPY_HOST_TO_DEVICE);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("aclrtMemcpy failed. ERROR: %d\n", ret);
return ret;
}
std::vector<int64_t> strides(shape.size(), 1);
for (int64_t i = shape.size() - 2; i >= 0; i--) {
strides[i] = shape[i + 1] * strides[i + 1];
}
*tensor = aclCreateTensor(shape.data(), shape.size(), dataType, strides.data(), 0, aclFormat::ACL_FORMAT_ND,
shape.data(), shape.size(), *deviceAddr);
return 0;
}
struct TensorResources {
void* queryDeviceAddr = nullptr;
void* keyDeviceAddr = nullptr;
void* weightsDeviceAddr = nullptr;
void* sparseIndicesDeviceAddr = nullptr;
void* sparseValuesDeviceAddr = nullptr;
aclTensor* queryTensor = nullptr;
aclTensor* keyTensor = nullptr;
aclTensor* weightsTensor = nullptr;
aclTensor* sparseIndicesTensor = nullptr;
aclTensor* sparseValuesTensor = nullptr;
};
int InitializeTensors(TensorResources& resources) {
std::vector<int64_t> queryShape = {1, 2, 1, 128};
std::vector<int64_t> keyShape = {1, 2, 1, 128};
std::vector<int64_t> weightsShape = {1, 2, 1};
std::vector<int64_t> sparseIndicesShape = {1, 2, 1, 2048};
std::vector<int64_t> sparseValuesShape = {1, 2, 1, 2048};
int64_t queryShapeSize = GetShapeSize(queryShape);
int64_t keyShapeSize = GetShapeSize(keyShape);
int64_t weightsShapeSize = GetShapeSize(weightsShape);
int64_t sparseIndicesShapeSize = GetShapeSize(sparseIndicesShape);
int64_t sparseValuesShapeSize = GetShapeSize(sparseValuesShape);
std::vector<float> queryHostData(queryShapeSize, 1);
std::vector<float> keyHostData(keyShapeSize, 1);
std::vector<float> weightsHostData(weightsShapeSize, 1);
std::vector<int32_t> sparseIndicesHostData(sparseIndicesShapeSize, 1);
std::vector<float> sparseValuesHostData(sparseValuesShapeSize, 1);
int ret = CreateAclTensor(queryHostData, queryShape, &resources.queryDeviceAddr,
aclDataType::ACL_FLOAT16, &resources.queryTensor);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
return ret;
}
ret = CreateAclTensor(keyHostData, keyShape, &resources.keyDeviceAddr,
aclDataType::ACL_FLOAT16, &resources.keyTensor);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
return ret;
}
ret = CreateAclTensor(weightsHostData, weightsShape, &resources.weightsDeviceAddr,
aclDataType::ACL_FLOAT16, &resources.weightsTensor);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
return ret;
}
ret = CreateAclTensor(sparseIndicesHostData, sparseIndicesShape, &resources.sparseIndicesDeviceAddr,
aclDataType::ACL_INT32, &resources.sparseIndicesTensor);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
return ret;
}
ret = CreateAclTensor(sparseValuesHostData, sparseValuesShape, &resources.sparseValuesDeviceAddr,
aclDataType::ACL_FLOAT16, &resources.sparseValuesTensor);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
return ret;
}
return ACL_SUCCESS;
}
int ExecuteLightningIndexer(TensorResources& resources, aclrtStream stream,
void** workspaceAddr, uint64_t* workspaceSize) {
int64_t sparseCount = 2048;
int64_t sparseMode = 3;
int64_t preTokens = 9223372036854775807;
int64_t nextTokens = 9223372036854775807;
bool returnValue = true;
constexpr const char layerOutStr[] = "BSND";
constexpr size_t layerOutLen = sizeof(layerOutStr);
char layoutQuery[layerOutLen];
char layoutKey[layerOutLen];
errno_t memcpyRet = memcpy_s(layoutQuery, sizeof(layoutQuery), layerOutStr, layerOutLen);
if (!CHECK_RET(memcpyRet == 0)) {
LOG_PRINT("memcpy_s layoutQuery failed. ERROR: %d\n", memcpyRet);
return -1;
}
memcpyRet = memcpy_s(layoutKey, sizeof(layoutKey), layerOutStr, layerOutLen);
if (!CHECK_RET(memcpyRet == 0)) {
LOG_PRINT("memcpy_s layoutKey failed. ERROR: %d\n", memcpyRet);
return -1;
}
aclOpExecutor* executor;
int ret = aclnnLightningIndexerGetWorkspaceSize(resources.queryTensor, resources.keyTensor, resources.weightsTensor, nullptr, nullptr, nullptr,
layoutQuery, layoutKey, sparseCount, sparseMode, preTokens, nextTokens,returnValue,
resources.sparseIndicesTensor, resources.sparseValuesTensor, workspaceSize, &executor);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("aclnnLightningIndexerGetWorkspaceSize failed. ERROR: %d\n", ret);
return ret;
}
if (*workspaceSize > 0ULL) {
ret = aclrtMalloc(workspaceAddr, *workspaceSize, ACL_MEM_MALLOC_HUGE_FIRST);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("allocate workspace failed. ERROR: %d\n", ret);
return ret;
}
}
ret = aclnnLightningIndexer(*workspaceAddr, *workspaceSize, executor, stream);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("aclnnLightningIndexer failed. ERROR: %d\n", ret);
return ret;
}
return ACL_SUCCESS;
}
int PrintValueOutResult(std::vector<int64_t> &shape, void** deviceAddr) {
auto size = GetShapeSize(shape);
std::vector<aclFloat16> resultData(size, 0);
auto ret = aclrtMemcpy(resultData.data(), resultData.size() * sizeof(resultData[0]),
*deviceAddr, size * sizeof(resultData[0]), ACL_MEMCPY_DEVICE_TO_HOST);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("copy result from device to host failed. ERROR: %d\n", ret);
return ret;
}
for (int64_t i = 0; i < size; i++) {
LOG_PRINT("mean result[%ld] is: %f\n", i, aclFloat16ToFloat(resultData[i]));
}
return ACL_SUCCESS;
}
int PrintIndicesOutResult(std::vector<int64_t> &shape, void** deviceAddr) {
auto size = GetShapeSize(shape);
std::vector<int32_t> resultData(size, 0);
auto ret = aclrtMemcpy(resultData.data(), resultData.size() * sizeof(resultData[0]),
*deviceAddr, size * sizeof(resultData[0]), ACL_MEMCPY_DEVICE_TO_HOST);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("copy result from device to host failed. ERROR: %d\n", ret);
return ret;
}
for (int64_t i = 0; i < size; i++) {
LOG_PRINT("mean result[%ld] is: %d\n", i, resultData[i]);
}
return ACL_SUCCESS;
}
void CleanupResources(TensorResources& resources, void* workspaceAddr,
aclrtStream stream, int32_t deviceId) {
if (resources.queryTensor) {
aclDestroyTensor(resources.queryTensor);
}
if (resources.keyTensor) {
aclDestroyTensor(resources.keyTensor);
}
if (resources.weightsTensor) {
aclDestroyTensor(resources.weightsTensor);
}
if (resources.sparseIndicesTensor) {
aclDestroyTensor(resources.sparseIndicesTensor);
}
if (resources.sparseValuesTensor) {
aclDestroyTensor(resources.sparseValuesTensor);
}
if (resources.queryDeviceAddr) {
aclrtFree(resources.queryDeviceAddr);
}
if (resources.keyDeviceAddr) {
aclrtFree(resources.keyDeviceAddr);
}
if (resources.weightsDeviceAddr) {
aclrtFree(resources.weightsDeviceAddr);
}
if (resources.sparseIndicesDeviceAddr) {
aclrtFree(resources.sparseIndicesDeviceAddr);
}
if (resources.sparseValuesDeviceAddr) {
aclrtFree(resources.sparseValuesDeviceAddr);
}
if (workspaceAddr) {
aclrtFree(workspaceAddr);
}
if (stream) {
aclrtDestroyStream(stream);
}
aclrtResetDevice(deviceId);
aclFinalize();
}
} // namespace
int main() {
int32_t deviceId = 0;
aclrtStream stream = nullptr;
TensorResources resources = {};
void* workspaceAddr = nullptr;
uint64_t workspaceSize = 0;
std::vector<int64_t> sparseIndicesShape = {1, 2, 1, 2048};
std::vector<int64_t> sparseValuesShape = {1, 2, 1, 2048};
int ret = ACL_SUCCESS;
// 1. Initialize device and stream
ret = Init(deviceId, &stream);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("Init acl failed. ERROR: %d\n", ret);
return ret;
}
// 2. Initialize tensors
ret = InitializeTensors(resources);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
CleanupResources(resources, workspaceAddr, stream, deviceId);
return ret;
}
// 3. Execute the operation
ret = ExecuteLightningIndexer(resources, stream, &workspaceAddr, &workspaceSize);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
CleanupResources(resources, workspaceAddr, stream, deviceId);
return ret;
}
// 4. Synchronize stream
ret = aclrtSynchronizeStream(stream);
if (!CHECK_RET(ret == ACL_SUCCESS)) {
LOG_PRINT("aclrtSynchronizeStream failed. ERROR: %d\n", ret);
CleanupResources(resources, workspaceAddr, stream, deviceId);
return ret;
}
// 5. Process results
PrintIndicesOutResult(sparseIndicesShape, &resources.sparseIndicesDeviceAddr);
PrintValueOutResult(sparseValuesShape, &resources.sparseValuesDeviceAddr);
// 6. Cleanup resources
CleanupResources(resources, workspaceAddr, stream, deviceId);
return 0;
}