Memory 如何计算OpenCL内存最大限制

有人知道如何测量常量、本地、私有、全局内存的最大限制或允许范围大小吗

我使用gpu caps查看器工具获取cl信息并得到结果

这意味着最大内存大小吗

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open cl device info

使用

clGetDeviceInfo（）

您需要的值是：

Global - CL_DEVICE_GLOBAL_MEM_SIZE - Total maximum mem size the device can hold
Local - CL_DEVICE_LOCAL_MEM_SIZE - Local group temporal shared max mem size
Constant - CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE - Constant arguments max mem size

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私有是不可能查询的，它依赖于很多东西，如代码和工作大小，只需尽可能少使用。

< P>这对于使用OpenCL的C++包装库来说是相当容易的：

// get the default device                                                                                                                                                                                                                
boost::compute::device device = boost::compute::system::default_device();

// print out memory sizes
std::cout << "device: " << device.name() << std::endl;
std::cout << "  global memory size: "
          << device.get_info<cl_ulong>(CL_DEVICE_GLOBAL_MEM_SIZE) / 1024 / 1024
          << " MB"
          << std::endl;
std::cout << "  local memory size: "
          << device.get_info<cl_ulong>(CL_DEVICE_LOCAL_MEM_SIZE) / 1024
          << " KB"
          << std::endl;
std::cout << "  constant memory size: "
          << device.get_info<cl_ulong>(CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE) / 1024
          << " KB"
          << std::endl;

有关完整的源代码，请参见示例。

local:，private:

// get the default device                                                                                                                                                                                                                
boost::compute::device device = boost::compute::system::default_device();

// print out memory sizes
std::cout << "device: " << device.name() << std::endl;
std::cout << "  global memory size: "
          << device.get_info<cl_ulong>(CL_DEVICE_GLOBAL_MEM_SIZE) / 1024 / 1024
          << " MB"
          << std::endl;
std::cout << "  local memory size: "
          << device.get_info<cl_ulong>(CL_DEVICE_LOCAL_MEM_SIZE) / 1024
          << " KB"
          << std::endl;
std::cout << "  constant memory size: "
          << device.get_info<cl_ulong>(CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE) / 1024
          << " KB"
          << std::endl;

device: Tahiti
  global memory size: 2511 MB
  local memory size: 32 KB
  constant memory size: 64 KB