cudaDeviceSetSharedMemConfig not working for GTX1650Ti

Accelerated Computing CUDA CUDA Programming and Performance
1 
#include <cuda_runtime.h>
#include <iostream>

int main() {
    cudaError_t err;
    int device_id = 0;  // 使用设备 0

    // 设置当前设备
    err = cudaSetDevice(device_id);
    if (err != cudaSuccess) {
        std::cerr << "Failed to set device: " << cudaGetErrorString(err) << std::endl;
        return -1;
    }

    // 获取设备属性
    cudaDeviceProp deviceProp;
    err = cudaGetDeviceProperties(&deviceProp, device_id);
    if (err != cudaSuccess) {
        std::cerr << "Failed to get device properties: " << cudaGetErrorString(err) << std::endl;
        return -1;
    }

    std::cout << "Device Name: " << deviceProp.name << std::endl;
    std::cout << "Compute Capability: " << deviceProp.major << "." << deviceProp.minor << std::endl;

    // 检查设备是否支持更改共享内存 bank 大小
    if (deviceProp.major >= 2) {
        // 设置共享内存 bank 大小为 8 字节
        err = cudaDeviceSetSharedMemConfig(cudaSharedMemBankSizeEightByte);
        if (err != cudaSuccess) {
            std::cerr << "Failed to set shared memory configuration: " << cudaGetErrorString(err) << std::endl;
            return -1;
        }

        // 查询共享内存 bank 大小
        cudaSharedMemConfig config;
        err = cudaDeviceGetSharedMemConfig(&config);
        if (err != cudaSuccess) {
            std::cerr << "Failed to get shared memory configuration: " << cudaGetErrorString(err) << std::endl;
            return -1;
        }

        // 打印共享内存 bank 大小
        switch (config) {
        case cudaSharedMemBankSizeDefault:
            std::cout << "Shared memory bank size: Default" << std::endl;
            break;
        case cudaSharedMemBankSizeFourByte:
            std::cout << "Shared memory bank size: 4 bytes" << std::endl;
            break;
        case cudaSharedMemBankSizeEightByte:
            std::cout << "Shared memory bank size: 8 bytes" << std::endl;
            break;
        default:
            std::cout << "Unknown shared memory bank size" << std::endl;
        }
    }
    else {
        std::cerr << "Device does not support changing shared memory bank size" << std::endl;
    }

    // 重置设备
    cudaDeviceReset();

    return 0;
}

When I tried to change the width of the bank to 8 bytes, it didn’t work？

Device Name: NVIDIA GeForce GTX 1650 Ti with Max-Q Design
Compute Capability: 7.5
Shared memory bank size: 4 bytes

2

Only the old Kepler architecture supports a bank size of 8 bytes.
Functions to get and set the shared memory configs are deprecated in the current CUDA version.
https://docs.nvidia.com/cuda/cuda-runtime-api/group__CUDART__DEVICE__DEPRECATED.html

3

The option to set the shared memory banks to a width of 8 bytes was only available up till Kepler (compute capability 3.x).
See

4

Thank you！