BPF, The existing bpf_test_run_opts structure exposes additional fields including "flags" and "cpu". I propose extending the bpftool prog run to accept options so set these additional fields. Use case: Some BPF programs access state that is potentially shared between programs running on different CPUs. This can impact the performance of a BPF program. To permit users to more accurately assess how their BPF program will perform when being invoked on multiple CPUs in parallel I am proposing adding the ability for bpftool to set the cpu field in bpf_test_run_opts struct when calling the syscall. If no one else is working on this or there are no objections, I will submit a patch using bpf-next https://github.com/xdp-project/bpf-next/. Regards, Alan Jowett
