是直接让device使用host上已有的一块的mem(p1)做buf,但是这个产生的CL_mem(p2)经过计算后值会改变,p2改变后通常p1不会被改变,因为虽然用的一块物理空间,但是cl_mem是高层封装,和host上的mem还是不一样的,要想使p1同步到p2的最新值,就要调用这句map
5. When I run the code in 1 GPU mode, I am able to allocate memory (over 10000 allocations). But when I run the code in 2 GPU mode, I run out of memory (out of host memory after 1000 allocations -- around 1 GB memory). OpenCL error code -6. The GPUs have 16 GB RAM...
OpenCL spec also states that the technique is faster than having to write data explicitly to device memory. I am trying to measure the data transfer time from host-device, and from device-host. My understanding is that OpenCL framework supports two ways of transferring dat...
Testing needed for error CL_INVALID_BUFFER_SIZE in clCreateBuffer with CL_MEM_COPY_HOST_PTR #2047 Open karolherbst opened this issue Aug 13, 2024· 0 comments Comments Contributor karolherbst commented Aug 13, 2024 OpenCL-Docs PR clarifying the error: KhronosGroup/OpenCL-Docs#1189 Sign up...
clCreateBuffer + CL_MEM_COPY_HOST_PTR does following things: - it allocates memory - it reserves GPU address range - it copies the data from input host_ptr to the allocated storage All of those operations are time consuming. There is another mode of buffers creation from input host_ptr ...
When my OpenCL platform and device are both CPU, would the behaviour (creating buffer using CL_MEM_USE_HOST_PTR )copy another uniform data or just link to the host_ptr address without copy? Dose any one knows? Thank you! Translate Tags: OpenCL* Professors Students...