• Is there hardware acceleration to encode video on the RK3399?
    Hi, I've been struggling with the OrangePi RK3399 for some time now. My goal is to use it as a conference recorder (sound-in, hdmi-in and camera). The problem I have is that ffmpeg is not up to the...
  • OpenCL: why there is so big difference between the time counter of cl_profiling_info ?
    I run an OpenCL task on Mali G-57 GPU, and profile the performance of kernel by code below: cl_int err = clEnqueueNDRangeKernel ( pocl -> getCommandQueue (), kernel, 2 , NULL , globalsize, localsize...
  • Optimised OpenCL SGEMM implementation for ARM Mali Midgard GPUs.
    I wish to implement an optimised sgemm for Mali MidGard Gpu whichas of now only support OpenCL 1.2. As far as I know, OpenCL 1.2 doesn't support subgroup extensions and Mali GPUs don't have any benefits...
  • Irregular behaviour of vectors in OpenCL(1.2) kernels
    So, I am trying to perform some operation inside an OpenCL kernel. I have this buffer named filter which is a 3x3 matrix initialized with value 1. I pass this as an argument to the OpenCL kernel from...
  • Zero Copy Buffers using cl_arm_import_memory extension in OpenCL 1.2 - arm mali midgard GPUs.
    Hi, I wish to allocate a vector and use it's data pointer to allocate a zero copy buffer on the GPU. There is this cl_arm_import_memory extension which can be used to do this. But I am not sure wether...