USAGE_ALLOCATE_HOST_MEMORY   26 modules/core/perf/opencl/perf_usage_flags.cpp         UMat dst(allocHostMem ? USAGE_ALLOCATE_HOST_MEMORY : USAGE_DEFAULT);
USAGE_ALLOCATE_HOST_MEMORY 4177 modules/core/src/ocl.cpp         if ((usageFlags & USAGE_ALLOCATE_HOST_MEMORY) != 0)