hp-timing is only used on benchtest today, but it can be used on other measurements in the future. It's broken on graviton 3 because the freq we have is 1050000000. 1000000000ULL/1050000000ULL = 0 and thus the difference becomes 0.  Attached patch fix the bug.  Link to the bug report - https://sourceware.org/bugzilla/show_bug.cgi?id=29329.

Regards,

Jun