https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94375
--- Comment #5 from Hongtao.liu <crazylht at gmail dot com> --- (In reply to Hongtao.liu from comment #4) > (In reply to Martin Jambor from comment #3) > > (In reply to Hongtao.liu from comment #1) > > > Try -mprefer-vector-width=128,256-bit vectorization is not helpful for 548 > > > according to our experience. > > > > I have seen this helping on one system running SLES 15.1 and with > > trunk abe13e1847f (Feb 17 2020) but not on another running openSUSE > > Tumbleweed and with trunk revision 26b3e568a60 (Mar 23 2020). So, > > from my perspective, perhaps it helps, perhaps it doesn't. > > What's your GCC option for OPENSUSE? > > Default value of -mprefer-vector-width for -mtune=zenver1 is 128, if that, > it won't help. > Different processor have different tune which may has different default > vector width. for -march=native, it depends on processor of your server/client.
