---
title: model.cpp
description: "```"
url: https://www.hiascend.com/document/detail/zh/canncommercial/latest/API/ascendtb/ascendtb_0069.html
sourcePath: /source/zh/canncommercial/900/API/ascendtb/ascendtb_0069.html
indexId: ffb4aa1ff4258a54dad8a446413780705a5b0e73d68c22b0de3a69830e1d0feb61
---
# model.cpp

```
#define USE_MEMPOOL

#include "model/model.h"
#include "aclnn/aclnn_gelu_operation.h"
#include "utils/utils.h"
#include "atb/atb_graph_op.h"
#include "memory/memory_utils.h"

void Model::InitResource(uint32_t deviceId)
{
    // 配置deviceId
    deviceId_ = deviceId;
    auto ret = aclrtSetDevice(deviceId_);
    CHECK_RET(ret, "aclrtSetDevice failed. ret: " + std::to_string(ret));

    // 创建context
    ret = atb::CreateContext(&modeContext_);
    CHECK_RET(ret, "ATB CreateContext failed. ret: " + std::to_string(ret));

    // 创建stream
    ret = aclrtCreateStream(&modelStream_);
    CHECK_RET(ret, "aclrtCreateStream failed. ret: " + std::to_string(ret));

    // 配置stream
    modeContext_->SetExecuteStream(modelStream_);
}

void Model::CreateModelGraph()
{
    LOG_INFO("CreateModelGraph start");
    // 这里以模型中有2个节点参与演示
    nodes_.resize(2);
    for (size_t i = 0; i < nodes_.size(); i++) {
        auto node = Node();
        nodes_[i] = node;
    }

    modelInTensors_.resize(Mode_INPUT_SIZE);
    modelOutTensors_.resize(Mode_OUTPUT_SIZE);

    internalTensors_.resize(1);
    size_t nodeId = 0;
    CreateGraphOpLayer(nodeId++);

    // step2：创建aclnn算子的Node
    CreateAclnnOpLayer(nodeId);
    LOG_INFO("CreateModelGraph end");
}

void Model::CreateGraphOpLayer(size_t nodeId)
{
    // 创建图算子的operation
    Node &graph_node = nodes_[nodeId];
    auto ret = CreateGraphOperation(&graph_node.operation_);
    CHECK_RET(ret, "CreateGraphOperation failed");
    graph_node.inTensors_.resize(graph_node.operation_->GetInputNum());

    // 设置图算子node节点的输入
    // 因为图算子的输入就是整个model的输入，因此这里直接从model的inTensors_赋值
    size_t layerInTensorId = 0;
    graph_node.inTensors_.at(layerInTensorId++) = &modelInTensors_.at(IN_TENSOR_A);
    graph_node.inTensors_.at(layerInTensorId++) = &modelInTensors_.at(IN_TENSOR_B);
    graph_node.inTensors_.at(layerInTensorId++) = &modelInTensors_.at(IN_TENSOR_C);
    graph_node.inTensors_.at(layerInTensorId++) = &modelInTensors_.at(IN_TENSOR_D);

    // 设置图算子node节点的输出，因为只有一个中间节点
    graph_node.outTensors_ = {&internalTensors_.at(0)};
    graph_node.outTensorTypes_ = {TensorType::INTERNAL_TENSOR};
};

void Model::CreateAclnnOpLayer(size_t nodeId)
{
    // 创建aclnn算子的operation
    Node &aclnn_node = nodes_[nodeId];
    AclnnGeluParam AclnnGeluParam;
    AclnnGeluParam.geluApproximate = -1;
    aclnn_node.operation_ = new GeluOperation("Gelu", AclnnGeluParam);
    aclnn_node.inTensors_.resize(aclnn_node.operation_->GetInputNum());

    // 设置aclnn算子node节点的输入
    // 因为图算子的输出就是aclnn算子的输入，
    size_t layerInTensorId = 0;
    aclnn_node.inTensors_.at(layerInTensorId++) = &internalTensors_.at(0);

    // 设置aclnn算子node节点的输出，model的输出
    aclnn_node.outTensors_ = {&modelOutTensors_.at(GLUE_OUT)};
    aclnn_node.outTensorTypes_ = {TensorType::NOT_INTERNAL_TENSOR};
}

void Model::CreateModelInput()
{
    LOG_INFO("CreateModelInput start");
    atb::SVector<atb::TensorDesc> intensorDescs;
    intensorDescs.resize(Mode_INPUT_SIZE);
    CreateInTensorDescs(intensorDescs);
    CreateInTensors(modelInTensors_, intensorDescs);
    LOG_INFO("CreateModelInput end");
}

void Model::CreateModelOutput()
{
    LOG_INFO("CreateModelOutput start");
    atb::SVector<atb::TensorDesc> outtensorDescs;
    outtensorDescs.resize(Mode_OUTPUT_SIZE);

    // 设置输入的input desc
    atb::SVector<atb::TensorDesc> inTensorDescs;
    inTensorDescs.resize(Mode_INPUT_SIZE);
    for (size_t i = 0; i < modelInTensors_.size(); ++i) {
        inTensorDescs.at(i) = modelInTensors_.at(i).desc;
    }

    // 调用infer shape，推导出模型的输出
    InferShape(inTensorDescs, outtensorDescs);
    CreateOutTensors(modelOutTensors_, outtensorDescs);
    LOG_INFO("CreateModelOutput end");
}

atb::Status Model::InferShape(
    const atb::SVector<atb::TensorDesc> &inTensorDescs, atb::SVector<atb::TensorDesc> &outTensorDescs)
{
    // 输出的shape和输入是相同的。取第一个的输入即可
    outTensorDescs.at(0) = modelInTensors_.at(0).desc;
    return atb::NO_ERROR;
}

void Model::Execute()
{
    LOG_INFO(modelName_ + " Execute start");
    for (size_t nodeId = 0; nodeId < nodes_.size(); ++nodeId) {
        BuildNodeVariantPack(nodeId);
        atb::Status status = ExecuteNode(nodeId);
        CHECK_RET(status, "ExecuteNode " + std::to_string(nodeId) + " failed. status: " + std::to_string(status));
    }

    WaitFinish();
    LOG_INFO(modelName_ + " Execute end");
}

void Model::BuildNodeVariantPack(int nodeId)
{
    LOG_INFO("buildNodeVariantPack nodes[" + std::to_string(nodeId) + "] start");

    auto &node = nodes_.at(nodeId);
    atb::SVector<atb::TensorDesc> inTensorDescs;
    node.variantPack_.inTensors.resize(node.operation_->GetInputNum());
    inTensorDescs.resize(node.operation_->GetInputNum());

    // 获取node中operation_的输入tensor desc
    for (size_t i = 0; i < node.inTensors_.size(); ++i) {
        node.variantPack_.inTensors.at(i) = *node.inTensors_.at(i);
        inTensorDescs.at(i) = node.inTensors_.at(i)->desc;
    }

    atb::SVector<atb::TensorDesc> outTensorDescs;
    outTensorDescs.resize(node.operation_->GetOutputNum());

    // 调用operation_的InferShape，推导出out tensor的desc
    atb::Status st = node.operation_->InferShape(inTensorDescs, outTensorDescs);

    node.variantPack_.outTensors.resize(node.operation_->GetOutputNum());
    for (size_t i = 0; i < node.outTensors_.size(); ++i) {
        node.variantPack_.outTensors.at(i) = *node.outTensors_.at(i);
        if (node.outTensorTypes_.at(i) == TensorType::INTERNAL_TENSOR) {
            // 创建输出tensor的空间
            CreateTensorFromDesc(node.variantPack_.outTensors.at(i), outTensorDescs.at(i));
            *node.outTensors_.at(i) = node.variantPack_.outTensors.at(i);
        }
    }
    LOG_INFO("buildNodeVariantPack nodes[" + std::to_string(nodeId) + "] end");
}

atb::Status Model::ExecuteNode(int nodeId)
{
    auto &node = nodes_.at(nodeId);

    // 调用Setup接口
    uint64_t workspaceSize = 0;
    atb::Status status = node.operation_->Setup(node.variantPack_, workspaceSize, modeContext_);
    CHECK_RET(status, "Setup node " + std::to_string(nodeId) + " failed. status: " + std::to_string(status));

    LOG_INFO("Get node[" + std::to_string(nodeId) + "] workspace size:" + std::to_string(workspaceSize));

    // 分配workspace
#ifdef USE_MEMPOOL
    CreateWorkspaceBuffer(nodeId, workspaceSize);
#else
    if (workspaceSize != 0) {
        status = aclrtMalloc(&node.workspace_, workspaceSize, ACL_MEM_MALLOC_HUGE_FIRST);
        CHECK_RET(status, "alloc error!");
    }
#endif

    // 调用Execute接口
    LOG_INFO("Execute node[" + std::to_string(nodeId) + "] start");
    status = node.operation_->Execute(node.variantPack_, (uint8_t *)(node.workspace_), workspaceSize, modeContext_);
    CHECK_RET(status, "Execute node " + std::to_string(nodeId) + " failed. status: " + std::to_string(status));
    LOG_INFO("Execute node[" + std::to_string(nodeId) + "] end");
    return atb::NO_ERROR;
}

void Model::CreateWorkspaceBuffer(int nodeId, int workspaceSizeNeeded)
{
    auto &node = nodes_.at(nodeId);
    if (workspaceSizeNeeded == 0) {
        LOG_INFO("skip the workspacebuffer for size 0");
        return;
    }
    if (node.workspaceBlockId_ == -1 || node.workspaceSize_ == 0) {
        node.workspaceSize_ = workspaceSizeNeeded;
        GetMemoryManager().AllocateBlock(node.workspaceSize_, node.workspaceBlockId_);
    }
    if (node.workspaceSize_ < workspaceSizeNeeded) {
        GetMemoryManager().FreeBlock(node.workspaceBlockId_);
        GetMemoryManager().AllocateBlock(workspaceSizeNeeded, node.workspaceBlockId_);
        node.workspaceSize_ = workspaceSizeNeeded;
    }

    GetMemoryManager().GetBlockPtr(node.workspaceBlockId_, node.workspace_);
}

void Model::FreeResource()
{
    LOG_INFO("FreeResource start");
    auto status = aclrtDestroyStream(modelStream_);  // 销毁stream
    CHECK_RET(status, "aclrtDestroyStream failed");

    // 释放operation
    for (auto &node : nodes_) {
        atb::DestroyOperation(node.operation_);
#ifdef USE_MEMPOOL
        GetMemoryManager().FreeBlock(node.workspaceBlockId_);
#endif
    }

    status = atb::DestroyContext(modeContext_);  // 销毁context
    CHECK_RET(status, "aclrtDestroyStream failed");

    // 销毁输入tensor
    for (size_t i = 0; i < modelInTensors_.size(); i++) {
        aclrtFree(modelInTensors_.at(i).deviceData);
    }

    // 销毁输出tensor
    for (size_t i = 0; i < modelOutTensors_.size(); i++) {
        aclrtFree(modelOutTensors_.at(i).deviceData);
    }

    // 释放中间tensor
    for (size_t i = 0; i < internalTensors_.size(); i++) {
        aclrtFree(internalTensors_.at(i).deviceData);
    }

    aclrtResetDevice(deviceId_);  // 重置deviceId
    LOG_INFO("FreeResource end");
}

void Model::WaitFinish()
{
    // step9：销毁创建的对象，释放内存
    // 流同步，作用是等待device侧任务计算完成
    auto ret = aclrtSynchronizeStream(modelStream_);
    CHECK_RET(ret, "sync error!");
}
```