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昇腾小AI

aclnnForeachCopy

支持的产品型号

  • Atlas A2训练系列产品/Atlas 800I A2推理产品。

接口原型

每个算子分为两段式接口,必须先调用“aclnnForeachCopyGetWorkspaceSize”接口获取入参并根据计算流程计算所需workspace大小,再调用“aclnnForeachCopy”接口执行计算。

  • aclnnStatus aclnnForeachCopyGetWorkspaceSize(const aclTensorList *x, aclTensorList *out, uint64_t *workspaceSize, aclOpExecutor **executor)
  • aclnnStatus aclnnForeachCopy(void *workspace, uint64_t workspaceSize, aclOpExecutor *executor, aclrtStream stream)

功能描述

  • 算子功能:用于实现两个张量列表内容的复制,要求输入和输出两个张量列表形状相同。

  • 计算公式:

    srcTensorList>dstTensorListsrc (TensorList ) -> dst(TensorList)

aclnnForeachCopyGetWorkspaceSize

  • 参数说明

    • src(aclTensorList*,计算输入):公式中的src,Device侧的aclTensorList,数据类型支持FLOAT、FLOAT16、BFLOAT16、INT32。数据格式支持ND,shape维度不高于8维。
    • dst(aclTensorList*,计算输出):公式中的dst,Device侧的aclTensorList,数据类型支持FLOAT、FLOAT16、BFLOAT16、INT32。数据格式支持ND,shape维度不高于8维。数据格式和shape跟入参x一致。
    • workspaceSize(uint64_t*,出参):返回需要在Device侧申请的workspace大小。
    • executor(aclOpExecutor**,出参):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

    第一段接口完成入参校验,出现以下场景时报错:
    返回161001(ACLNN_ERR_PARAM_NULLPTR): 1. 传入的src或dst是空指针。
    返回161002(ACLNN_ERR_PARAM_INVALID): 1. src或dst的数据类型不在支持的范围之内。
                                         2. src、dst的shape不一致。
                                         3. self维度大于8。

aclnnForeachCopy

  • 参数说明

    • workspace(void*,入参):在Device侧申请的workspace内存地址。
    • workspaceSize(uint64_t,入参):在Device侧申请的workspace大小,由第一段接口aclnnForeachCopyGetWorkspaceSize获取。
    • executor(aclOpExecutor*,入参):op执行器,包含了算子计算流程。
    • stream(aclrtStream,入参):指定执行任务的AscendCL Stream流。
  • 返回值

    aclnnStatus:返回状态码,具体参见aclnn返回码

约束与限制

  • dtype仅支持FLOAT32、FLOAT16、BFLOAT16和INT32。

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

#include <iostream>
#include <vector>
#include "acl/acl.h"
#include "aclnnop/aclnn_foreach_copy.h"
#define CHECK_RET(cond, return_expr) \
    do {                             \
        if (!(cond)) {               \
            return_expr;             \
        }                            \
    } while (0)
#define LOG_PRINT(message, ...)         \
    do {                                \
        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)
{
    // 固定写法,acl初始化
    auto ret = aclInit(nullptr);
    CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("aclInit failed. ERROR: %d\n", ret); return ret);
    ret = aclrtSetDevice(deviceId);
    CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("aclrtSetDevice failed. ERROR: %d\n", ret); return ret);
    ret = aclrtCreateStream(stream);
    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);
    // 调用aclrtMalloc申请device侧内存
    auto ret = aclrtMalloc(deviceAddr, size, ACL_MEM_MALLOC_HUGE_FIRST);
    CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("aclrtMalloc failed. ERROR: %d\n", ret); return ret);
    // 调用aclrtMemcpy将host侧数据复制到device侧内存上
    ret = aclrtMemcpy(*deviceAddr, size, hostData.data(), size, ACL_MEMCPY_HOST_TO_DEVICE);
    CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("aclrtMemcpy failed. ERROR: %d\n", ret); return ret);
    // 计算连续tensor的strides
    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];
    }
    // 调用aclCreateTensor接口创建aclTensor
    *tensor = aclCreateTensor(shape.data(),
        shape.size(),
        dataType,
        strides.data(),
        0,
        aclFormat::ACL_FORMAT_ND,
        shape.data(),
        shape.size(),
        *deviceAddr);
    return 0;
}
int main()
{
    // 1.(固定写法)device/stream初始化, 参考acl对外接口列表
    // 根据自己的实际device填写deviceId
    int32_t deviceId = 0;
    aclrtStream stream;
    auto ret = Init(deviceId, &stream);
    CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("Init acl failed. ERROR: %d\n", ret); return ret);
    // 2. 构造输入与输出,需要根据API的接口自定义构造
    std::vector<int64_t> selfShape1 = {2, 3};
    std::vector<int64_t> selfShape2 = {1, 3};
    std::vector<int64_t> outShape1 = {2, 3};
    std::vector<int64_t> outShape2 = {1, 3};
    void *input1DeviceAddr = nullptr;
    void *input2DeviceAddr = nullptr;
    void *out1DeviceAddr = nullptr;
    void *out2DeviceAddr = nullptr;
    aclTensor *input1 = nullptr;
    aclTensor *input2 = nullptr;
    aclTensor *out1 = nullptr;
    aclTensor *out2 = nullptr;
    std::vector<float> input1HostData = {1, 2, 3, 4, 5, 6};
    std::vector<float> input2HostData = {7, 8, 9};
    std::vector<float> out1HostData(6, 0);
    std::vector<float> out2HostData(3, 0);
    // 创建input1 aclTensor
    ret = CreateAclTensor(input1HostData, selfShape1, &input1DeviceAddr, aclDataType::ACL_FLOAT, &input1);
    CHECK_RET(ret == ACL_SUCCESS, return ret);
    // 创建input2 aclTensor
    ret = CreateAclTensor(input2HostData, selfShape2, &input2DeviceAddr, aclDataType::ACL_FLOAT, &input2);
    CHECK_RET(ret == ACL_SUCCESS, return ret);
    // 创建out1 aclTensor
    ret = CreateAclTensor(out1HostData, outShape1, &out1DeviceAddr, aclDataType::ACL_FLOAT, &out1);
    CHECK_RET(ret == ACL_SUCCESS, return ret);
    // 创建out2 aclTensor
    ret = CreateAclTensor(out2HostData, outShape2, &out2DeviceAddr, aclDataType::ACL_FLOAT, &out2);
    CHECK_RET(ret == ACL_SUCCESS, return ret);
    std::vector<aclTensor *> tempInput{input1, input2};
    aclTensorList *tensorListInput = aclCreateTensorList(tempInput.data(), tempInput.size());
    std::vector<aclTensor *> tempOutput{out1, out2};
    aclTensorList *tensorListOutput = aclCreateTensorList(tempOutput.data(), tempOutput.size());
    // 3. 调用CANN算子库API,需要修改为具体的Api名称
    uint64_t workspaceSize = 0;
    aclOpExecutor *executor;
    // 调用aclnnForeachCopy第一段接口
    ret = aclnnForeachCopyGetWorkspaceSize(tensorListInput, tensorListOutput, &workspaceSize, &executor);
    CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("aclnnForeachCopyGetWorkspaceSize failed. ERROR: %d\n", ret); return ret);
    // 根据第一段接口计算出的workspaceSize申请device内存
    void *workspaceAddr = nullptr;
    if (workspaceSize > 0) {
        ret = aclrtMalloc(&workspaceAddr, workspaceSize, ACL_MEM_MALLOC_HUGE_FIRST);
        CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("allocate workspace failed. ERROR: %d\n", ret); return ret);
    }
    // 调用aclnnForeachCopy第二段接口
    ret = aclnnForeachCopy(workspaceAddr, workspaceSize, executor, stream);
    CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("aclnnForeachCopy failed. ERROR: %d\n", ret); return ret);
    // 4. (固定写法)同步等待任务执行结束
    ret = aclrtSynchronizeStream(stream);
    CHECK_RET(ret == ACL_SUCCESS, LOG_PRINT("aclrtSynchronizeStream failed. ERROR: %d\n", ret); return ret);
    // 5. 获取输出的值,将device侧内存上的结果复制至host侧,需要根据具体API的接口定义修改
    auto size = GetShapeSize(outShape1);
    std::vector<float> out1Data(size, 0);
    ret = aclrtMemcpy(out1Data.data(),
        out1Data.size() * sizeof(out1Data[0]),
        out1DeviceAddr,
        size * sizeof(out1Data[0]),
        ACL_MEMCPY_DEVICE_TO_HOST);
    for (int64_t i = 0; i < size; i++) {
        LOG_PRINT("out1 result[%ld] is: %f\n", i, out1Data[i]);
    }
    size = GetShapeSize(outShape2);
    std::vector<float> out2Data(size, 0);
    ret = aclrtMemcpy(out2Data.data(),
        out2Data.size() * sizeof(out2Data[0]),
        out2DeviceAddr,
        size * sizeof(out2Data[0]),
        ACL_MEMCPY_DEVICE_TO_HOST);
    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("out2 result[%ld] is: %f\n", i, out2Data[i]);
    }
    // 6. 释放aclTensor和aclScalar,需要根据具体API的接口定义修改
    aclDestroyTensorList(tensorListInput);
    aclDestroyTensorList(tensorListOutput);
    // 7.释放device资源,需要根据具体API的接口定义修改
    aclrtFree(input1DeviceAddr);
    aclrtFree(input2DeviceAddr);
    aclrtFree(out1DeviceAddr);
    aclrtFree(out2DeviceAddr);
    if (workspaceSize > 0) {
        aclrtFree(workspaceAddr);
    }
    aclrtDestroyStream(stream);
    aclrtResetDevice(deviceId);
    aclFinalize();
    return 0;
}
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