如何在cygwin中为英特尔GPU设置opencl
我有一台带有Intel（R）HD图形520 GPU的笔记本电脑。我添加了opencl开发人员软件包中cygwin。在c上github。它是针对Apple，因此我修改了Makefile，以使用适当的标题和设置GCC。现在，代码编译并执行良好（创建的BMP文件）：
$ ./mandelbrot.exe
Device 0: GenuineIntel pthread-Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz
我有两个问题：
＃1。如何将Intel GPU添加到/etc/opencl/vendors列表中？我尝试从Intel网站安装Windows OS 和Intel Graphics Technology驱动程序包 opencl应用程序的Intel CPU运行时，但是我不知道在哪里可以找到适当的<代码> opencl dll i可以指向intel.idc文件。
＃2。在/etc/opencl/vendors中，我找到了pocl.icd文件指向cygpocl-2.dll。我认为这是Pthread库。但是在我看来，尽管我有4个核心，但它仅运行一个线程。我应该进行任何修改以在多个线程中运行它吗？我调试了代码，似乎只有一个设备，因此仅在一个线程上运行。在初始化函数中，它设置了用于处理最终BMP设备搅动器的device_work_size属性。但是，由于只有一个设备，因此整个BMP通过一次运行（一个clenqueuendrangekernel>> clenqueuereadbuffer 被调用）。
更新
我已经安装了 Intel（R）图形 - Windows* DCH驱动程序。它安装了图形驱动程序。我找到了intelocl64.dll（AS /cygdrive/c/program文件（x86）/common Files/intel/intel/intel/intel libries/intel64/intelocl64.dll）。我将整个路径放入/etc/opencl/vendors/intel.icd文件中。到目前为止，一切都很好。现在它甚至找不到pthread设备... bah ...
I have a Laptop with Intel(R) HD Graphics 520 GPU in it. I added OpenCL developer package to Cygwin. I have found a small Mandelbrot-set calculator program for OpenCL in C on GitHub. It is for Apple, so I modified the Makefile to use the proper headers and settings for gcc. Now the code compiles and executes nicely (bmp file created):
$ ./mandelbrot.exe
Device 0: GenuineIntel pthread-Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz
I have two questions:
#1. How can I add (if it is possible) the Intel GPU to the /etc/OpenCL/vendors list? I tried to install from Intel site the Intel CPU runtime for OpenCL Applications for Windows OS and Intel Graphics Technology driver package, but I do not know where can I find the proper OpenCL dll I can point in the intel.idc file.
#2. In /etc/OpenCL/vendors I have found a pocl.icd file pointing to cygpocl-2.dll. I assume this is the pthread library. But it seems to me it is running only a single thread, although I have 4 cores. Should I do any modification to run it in multiple threads? I debugged the code and it seems that as there are only one device found, so it runs only on one thread. In the initialization function it sets the device_work_size property for processing a stirp per device of the final bmp. But as there is only one device, the whole bmp is processed by one run (one clEnqueueNDRangeKernel and one clEnqueueReadBuffer is called).
UPDATE
I have installed Intel(R) Graphics – Windows* DCH Drivers. It installed graphics drivers. I have found the intelocl64.dll (as /cygdrive/c/Program Files (x86)/Common Files/Intel/Shared Libraries/intel64/intelocl64.dll). I put this whole path into /etc/OpenCL/vendors/intel.icd file. So far, so good. Now it cannot even find pthread device... Bah...
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我认为不可能使用Cygwin的GPU。我建议您构建本机Windows二进制（例如，使用Visual Studio或Intel DPC ++）或使用WSL。请参阅 https://github.com/intel.com/intel/compute-compute-runtime/blob-blob /master/wsl.md 是否有要求。
I don't think it is possible to use the GPU from cygwin. I would recommend to either build a native Windows binary (e.g. with Visual Studio or Intel DPC++) or use WSL. See https://github.com/intel/compute-runtime/blob/master/WSL.md for requirements.