LWJGL在IDE外部运行时找到不同的OpenCL安装

如何解决LWJGL在IDE外部运行时找到不同的OpenCL安装

我已经将IntelliJ中的Java用作业余爱好已经有一段时间了，因此决定开始使用OpenCL进行并行计算。我敢肯定，我一直没有错误地下载LWJGL库并将其添加到我的项目中，因为它始终可以编译。问题是，当我运行该程序时，它将产生以下输出：

Platforms found: 1
Treating platform 140038554960288
    Platform name: Clover 
    Platform vendor: Mesa 
    Platform version: OpenCL 1.1 Mesa 20.1.5 
Error: -1
Exception in thread "main" java.lang.AssertionError: -1
    at ch.test.Test1.devices_gpu(Test1.java:71)
    at ch.test.Test1.treatPlatform(Test1.java:22)
    at ch.test.Test1.main(Test1.java:94)

该程序使用assert检查OpenCL函数的每次返回，并且在不返回CL_SUCCESS时崩溃。这里的错误是CL_DEVICE_NOT_FOUND。

当我将项目导出为jar并在IDE中运行它时，它会产生相同的输出。但是，如果我将发出的命令（/home/user/Downloads/jdk-14.0.2/bin/java -ea -Dfile.encoding=UTF-8 -jar /home/user/IdeaProjects/LWJGLTest/out/artifacts/LWJGLTest_jar/LWJGLTest.jar）复制到控制台并在其中运行jar，它将为我提供以下（预期）输出：

user@user-desktop:~$ /home/user/Downloads/jdk-14.0.2/bin/java -ea -Dfile.encoding=UTF-8 -jar /home/user/IdeaProjects/LWJGLTest/out/artifacts/LWJGLTest_jar/LWJGLTest.jar
Platforms found: 1
Treating platform 140169617041680
    Platform name: NVIDIA CUDA
    Platform vendor: NVIDIA Corporation
    Platform version: OpenCL 1.2 CUDA 10.2.178
Error: 0
1
    Devices found: 1
        Name: GeForce GTX 1080

我使用clinfo来查看计算机找到的OpenCL平台：

user@user-desktop:~$ clinfo
Number of platforms                               1
  Platform Name                                   NVIDIA CUDA
  Platform Vendor                                 NVIDIA Corporation
  Platform Version                                OpenCL 1.2 CUDA 11.0.228
  Platform Profile                                FULL_PROFILE
  Platform Extensions                             cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_fp64 cl_khr_byte_addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll cl_nv_copy_opts cl_nv_create_buffer cl_khr_int64_base_atomics cl_khr_int64_extended_atomics
  Platform Extensions function suffix             NV

  Platform Name                                   NVIDIA CUDA
Number of devices                                 1
  Device Name                                     GeForce GTX 1080
...

有趣的是，当我更改驱动程序（从开源到专有的，反之亦然）时，clinfo暂时找不到任何平台（当然，直到我重新启动），但是在IntelliJ中，代码产生的输出相同（并在未安装平台时找到平台！），而在jar中运行时找不到平台。

我尝试了几种不同的JRE，但是在IntelliJ中都没有。我也尝试过更改类路径，但似乎无济于事。

这一切都在Linux Mint 19下进行。当我在装有Windows的笔记本电脑上进行相同操作时，没有问题，并且一切正常。用于测试的代码：

package ch.test;

import org.lwjgl.PointerBuffer;
import org.lwjgl.opencl.CL22;

import java.nio.ByteBuffer;

public class Test1 {

    static int getNumOfPlatforms() {
        int[] buffer = new int[1];
        int error = CL22.clGetPlatformIDs(null,buffer);
        assert error == CL22.CL_SUCCESS;
        return buffer[0];
    }

    static void treatPlatform(long plat) {
        System.out.println("\tPlatform name: " + getPlatformParam(plat,CL22.CL_PLATFORM_NAME));
        System.out.println("\tPlatform vendor: " + getPlatformParam(plat,CL22.CL_PLATFORM_VENDOR));
        System.out.println("\tPlatform version: " + getPlatformParam(plat,CL22.CL_PLATFORM_VERSION));

        PointerBuffer devices = devices_gpu(plat);
        System.out.println("\tDevices found: " + devices.capacity());
        while(devices.hasRemaining()) {
            treatDevice(devices.get());
        }
    }


    static void treatDevice(long device) {
        System.out.println("\t\tName: " + deviceProperty(device,CL22.CL_DEVICE_NAME));
    }

    static String deviceProperty(long device,int prop) {
        PointerBuffer length = PointerBuffer.allocateDirect(1);
        CL22.clGetDeviceInfo(device,prop,(long[])null,length);

        ByteBuffer value = ByteBuffer.allocateDirect((int)length.get());
        CL22.clGetDeviceInfo(device,value,null);
        StringBuilder builder = new StringBuilder(value.capacity());

        for(int i = 0; i < builder.capacity(); i++){
            builder.append((char)value.get());
        }

        return builder.toString();
    }

    static String getPlatformParam(long plat,int attr) {
        PointerBuffer length = PointerBuffer.allocateDirect(1);
        CL22.clGetPlatformInfo(plat,attr,length);

        ByteBuffer value = ByteBuffer.allocateDirect((int)length.get());
        CL22.clGetPlatformInfo(plat,null);
        StringBuilder builder = new StringBuilder(value.capacity());

        for(int i = 0; i < builder.capacity(); i++){
            builder.append((char)value.get());
        }

        return builder.toString();
    }

    static PointerBuffer devices_gpu(long plat) {
        int error;
        int[] amount = new int[]{-1};
        error = CL22.clGetDeviceIDs(plat,CL22.CL_DEVICE_TYPE_ALL,null,amount);
        System.out.println("Error: " + error);
        assert error == CL22.CL_SUCCESS: error;
        
        System.out.println(amount[0]);

        PointerBuffer devices = PointerBuffer.allocateDirect(amount[0]);
        error = CL22.clGetDeviceIDs(plat,devices,(int[])null);
        assert error == CL22.CL_SUCCESS: error;

        return devices;
    }

    public static void main(String[] args) {
        int error;

        int amountOfPlatforms = getNumOfPlatforms();
        System.out.println("Platforms found: " + amountOfPlatforms);
        PointerBuffer platforms = PointerBuffer.allocateDirect(amountOfPlatforms);
        error = CL22.clGetPlatformIDs(platforms,(int[])null);
        assert error == CL22.CL_SUCCESS;

        while(platforms.hasRemaining()) {
            long plat = platforms.get();
            System.out.println("Treating platform " + plat);
            treatPlatform(plat);
        }
    }
}

解决方法

虽然我没有找到确切的问题，但是我通过从他们的网站重新安装IntelliJ来解决了。我以前由Linux Mint Software Manager完成的安装似乎有问题。现在一切都很好感谢您的阅读和帮助

LWJGL在IDE外部运行时找到不同的OpenCL安装

如何解决LWJGL在IDE外部运行时找到不同的OpenCL安装

解决方法

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