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aclnnSignBitsPack

支持的产品型号

  • Atlas 推理系列产品
  • 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“aclnnSignBitsPackGetWorkspaceSize”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“aclnnSignBitsPack”接口执行计算。

  • aclnnStatus aclnnSignBitsPackGetWorkspaceSize(const aclTensor* self, int64_t size, aclTensor* out, uint64_t* workspaceSize, aclOpExecutor** executor)

  • aclnnStatus aclnnSignBitsPack(void* workspace, uint64_t workspaceSize, aclOpExecutor* executor, aclrtStream stream)

功能描述

将float16类型或者float32类型的1位Adam打包为uint8。

aclnnSignBitsPackGetWorkspaceSize

  • 参数说明

    • self(aclTensor*,计算输入):表示用于计算的1D张量,Device侧的tensor,支持空tensor场景,数据类型支持FLOAT16和FLOAT。支持非连续的Tensor。支持数据格式为ND。

    • size(int64_t,计算输入): 表示处理维度,reshape时输出张量的第一个维度。

    • out(aclTensor*,计算输出): 输出的tensor,数据类型支持UINT8。支持数据格式为ND。

    • 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检,出现以下场景时报错:
161001 (ACLNN_ERR_PARAM_NULLPTR):1. 传入的self或out是空指针。
161002 (ACLNN_ERR_PARAM_INVALID):1. 传入的self或out的数据类型/数据格式不在支持的范围之内。
                                  2. self的维度不是一维。
                                  3. size小于0。
                                  4. self的元素个数/8不能被size整除。
                                 

aclnnSignBitsPack

  • 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aclnnSignBitsPackGetWorkspaceSize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

无。

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 <memory>
#include <vector>
#include "acl/acl.h"
#include "aclnnop/aclnn_sign_bits_pack.h"

#define CHECK_RET(cond, return_expr) \
  do {                               \
    if (!(cond)) {                   \
      return_expr;                   \
    }                                \
  } while (0)

#define CHECK_FREE_RET(cond, return_expr) \
  do {                                     \
      if (!(cond)) {                       \
          Finalize(deviceId, stream);      \
          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,AscendCL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侧数据拷贝到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;
}

void Finalize(int32_t deviceId, aclrtStream& stream)
{
  aclrtDestroyStream(stream);
  aclrtResetDevice(deviceId);
  aclFinalize();
}

int aclnnSignBitsPackTest(int32_t deviceId, aclrtStream& stream) {
  auto ret = Init(deviceId, &stream);
  CHECK_FREE_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
  int64_t outsize = 2;
  
  std::vector<int64_t> selfShape = {14};
  std::vector<int64_t> outShape = {2,1};

  void* selfDeviceAddr = nullptr;
  void* outDeviceAddr = nullptr;

  aclTensor* self = nullptr;
  aclTensor* out = nullptr;

  std::vector<float> selfHostData{5, 4, 3, 2, 0, -1, -2, 4, 3, 2, 1, 0, -1, -2};
  std::vector<uint8_t> outHostData{0, 0};

  // 创建self aclTensor
  ret = CreateAclTensor(selfHostData, selfShape, &selfDeviceAddr, aclDataType::ACL_FLOAT, &self);
  std::unique_ptr<aclTensor, aclnnStatus (*)(const aclTensor *)> selfTensorPtr(self, aclDestroyTensor);
  std::unique_ptr<void, aclError (*)(void *)> selfDeviceAddrPtr(selfDeviceAddr, aclrtFree);
  CHECK_FREE_RET(ret == ACL_SUCCESS, return ret);

  // 创建out aclTensor
  ret = CreateAclTensor(outHostData, outShape, &outDeviceAddr, aclDataType::ACL_UINT8, &out);
  std::unique_ptr<aclTensor, aclnnStatus (*)(const aclTensor *)> outTensorPtr(out, aclDestroyTensor);
  std::unique_ptr<void, aclError (*)(void *)> outDeviceAddrPtr(outDeviceAddr, aclrtFree);
  CHECK_FREE_RET(ret == ACL_SUCCESS, return ret);

  // 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aclnnSignBitsPack第一段接口
  ret = aclnnSignBitsPackGetWorkspaceSize(self,
                                       outsize,
                                       out,
                                       &workspaceSize,
                                       &executor);
  CHECK_FREE_RET(ret == ACL_SUCCESS, LOG_PRINT("aclnnSignBitsPackGetWorkspaceSize 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;
  std::unique_ptr<void, aclError (*)(void *)> workspaceAddrPtr(nullptr, aclrtFree);
  if (workspaceSize > 0) {
    ret = aclrtMalloc(&workspaceAddr, workspaceSize, ACL_MEM_MALLOC_HUGE_FIRST);
    CHECK_FREE_RET(ret == ACL_SUCCESS, LOG_PRINT("allocate workspace failed. ERROR: %d\n", ret); return ret);
    workspaceAddrPtr.reset(workspaceAddr);
  }
  // 调用aclnnSignBitsPack第二段接口
  ret = aclnnSignBitsPack(workspaceAddr, workspaceSize, executor, stream);
  CHECK_FREE_RET(ret == ACL_SUCCESS, LOG_PRINT("aclnnSignBitsPack 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_FREE_RET(ret == ACL_SUCCESS, LOG_PRINT("aclrtSynchronizeStream failed. ERROR: %d\n", ret); return ret);

  // 5. 获取输出的值,将device侧内存上的结果拷贝至host侧,需要根据具体API的接口定义修改
  auto size = GetShapeSize(outShape);
  std::vector<uint8_t> outData(size, 0);
  ret = aclrtMemcpy(outData.data(), outData.size() * sizeof(outData[0]), outDeviceAddr,
                    size * sizeof(outData[0]), ACL_MEMCPY_DEVICE_TO_HOST);
  CHECK_FREE_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("out result[%ld] is: %u\n", i, outData[i]);
  }
  return ACL_SUCCESS;
}

int main() {
  // 1. (固定写法)device/stream初始化,参考AscendCL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 = aclnnSignBitsPackTest(deviceId, stream);
  CHECK_FREE_RET(ret == ACL_SUCCESS, LOG_PRINT("aclnnSignBitsPackTest failed. ERROR: %d\n", ret); return ret);

  Finalize(deviceId, stream);
  return 0;
}