Warning on AMD GPUs

[amontoison]

┌ Info: Global hostcalls detected!
│ - Source: MethodInstance for GPUArrays.gpu_getindex_kernel(::KernelAbstractions.CompilerMetadata{KernelAbstractions.NDIteration.DynamicSize, KernelAbstractions.NDIteration.DynamicCheck, Nothing, CartesianIndices{2, Tuple{Base.OneTo{Int64}, Base.OneTo{Int64}}}, KernelAbstractions.NDIteration.NDRange{2, KernelAbstractions.NDIteration.DynamicSize, KernelAbstractions.NDIteration.DynamicSize, CartesianIndices{2, Tuple{Base.OneTo{Int64}, Base.OneTo{Int64}}}, CartesianIndices{2, Tuple{Base.OneTo{Int64}, Base.OneTo{Int64}}}}}, ::AMDGPU.Device.ROCDeviceMatrix{Float64, 1}, ::ROCDeviceArray{Float64, 3, 1}, ::Tuple{Int64, Int64, Int64}, ::Base.Slice{Base.OneTo{Int64}}, ::Base.Slice{Base.OneTo{Int64}}, ::Int64)
│ - Hostcalls: [:malloc_hostcall]
│ 
│ Use `AMDGPU.synchronize(; stop_hostcalls=true)` to synchronize and stop them.
└ Otherwise, performance might degrade if they keep running in the background.