Is there any prefetch mechanism on Mali Bifrost GPU?

Hi Guys,

I am actively optimizing my OpenCL program running on Mali Bifrost GPU.

I wonder whether cache prefetch would have some performance improvements for my program.

I didn't find any materials about mali GPU prefetching, however, I found there is one built-in function (i.e., prefetch()) in OpenCL standard.

After my trying, this prefetch() function has no effect on my program's performance. Thus, I think maybe the prefetch function

is just an empty implementation on mali GPU

Does some one know:

1. Is there any prefetch mechanism on Mali Bifrost GPU even though there is an OpenCL related function prefetch()?

2. If the prefetch does have benefits for performance, how can I use it preperly?

Thank you so much for answering my questions in advance!