https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87832
--- Comment #8 from Alexander Monakov <amonakov at gcc dot gnu.org> --- (In reply to Jan Hubicka from comment #7) > > 53730 r btver2_fp_min_issue_delay > > 53760 r znver1_fp_transitions > > 93960 r bdver3_fp_transitions > > 106102 r lujiazui_core_check > > 106102 r lujiazui_core_transitions > > 196123 r lujiazui_core_min_issue_delay > > > > What shall we do with similar blowups in lujiazui and b[dt]ver[123] models? > Yes, I think that makes sense... Do you mean we should fix modeling of divisions there as well? I don't have latency/throughput measurements for those CPUs, nor access so I can run experiments myself, unfortunately. I guess you mean just making a patch to model division units separately, leaving latency/throughput as in current incorrect models, and leave it to manufacturers to correct it? Alternatively, for AMD Bobcat and Bulldozer we might be able to crowd-source it eventually.
