[nova][cyborg][gpu] GPU performance testing

Hi, I got a question about tools and practices to check GPU performance in an OpenStack environment that I need some help to answer. The question is about recommended GPU performance testing/benchmarking tools if there are a few that people in the community are using and would recommend? The scope of the testing work is to check GPU performance in OpenStack VMs (both virtualized and passthrough). All the help and pointers are very much appreciated! Thanks, Ildikó