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Mali G57 image object created from buffer through svm failed

Mr jiao

cl_image_format imageFormat;

imageFormat.image_channel_data_type = CL_UNSIGNED_INT16;

imageFormat.image_channel_order = CL_RGBA; // considering image with only single channel

// Allocate SVM memory

size_t imageSize = width * height * sizeof(cl_uchar);

cl_uchar *imgSvmPtr = (cl_uchar *) clSVMAlloc(context, CL_MEM_READ_WRITE, imageSize, 0);

// Create a buffer object using the SVM memory

cl_mem svmImgBuffer = clCreateBuffer(context, CL_MEM_USE_HOST_PTR, imageSize, imgSvmPtr, NULL);

// Set the SVM buffer to image description parameter and set the other parameters accordingly

cl_image_desc imageDesc;

memset(&imageDesc, '\0', sizeof(cl_image_desc));

imageDesc.image_type = CL_MEM_OBJECT_IMAGE2D;

imageDesc.image_width = width / 4;

imageDesc.image_height = height;

imageDesc.mem_object= svmImgBuffer;

 

// Create 2D image, which will be used as input as well as output image

cl_mem image2D = clCreateImage(context, CL_MEM_READ_WRITE, &imageFormat, &imageDesc, NULL, &status);

status = -65,  I want to know why ? thanks

  • +1 Arm Employee Badge
    Mr jiao said:
    size_t imageSize = width * height * sizeof(cl_uchar);

    Shouldn't this be sizeof(cl_ushort) given the channel data type is CL_UNSIGNED_INT16?

    If this doesn't work, try setting image_depth = 1 and image_array_size = 1.

    If that doesn't work, then I'm afraid it looks like a potential driver issue. What driver version are you using? Any reason you're starting from an SVM allocation rather than a buffer?

    Regards,

    Kevin

  • 0 in reply to Kévin Petit

    anyway, thanks. first, this should be size_t imageSize = width * height * sizeof(cl_ushort), I write wrong. I try setting image_depth and image_array_size,but it don't work. my driver is follows:

    name : ARM Platform
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] vendor : ARM
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] version : OpenCL 2.1 v1.r21p0-01rel0.15967fb8d94527311cf969f52c0720a2
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] opencl device info :
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] name : Mali-G57 r0p0
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] vendor : ARM
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] type : GPU
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] profile : FULL_PROFILE
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] version : OpenCL 2.1 v1.r21p0-01rel0.15967fb8d94527311cf969f52c0720a2
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] driver version : 2.1
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] max workgroup size : 512
    11-06 09:33:32.813 7993 7993 D mialgo_basic: [mialgo_basic] local mem size : 32768

    I wonder this driver don't suppose u16 rgba svm to create image object