Yeah, on eoan I get: $ cat /proc/spl/kstat/zfs/fletcher_4_bench 0 0 0x01 -1 0 4250112835 2191051355493 implementation native byteswap scalar 7121128976 5682673600 superscalar 9132158207 6984205638 superscalar4 8279361738 6770847284 fastest superscalar superscalar
The same machine on bionic gets: 0 0 0x01 -1 0 67628130770 127422129063 implementation native byteswap scalar 7105261516 5016484387 superscalar 9725496554 7224297957 superscalar4 8153749237 6904111964 sse2 16325929140 9147142980 ssse3 16010951957 14542922899 avx2 24379617040 23016231817 fastest avx2 avx2 Bionic's algorithm using avx2 is 2.6x faster. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1845018 Title: SIMD broken in 0.8.1 please backport fix, like Debian Status in zfs-linux package in Ubuntu: Confirmed Bug description: Eoan Ermine is using 0.8.1. On the current LiveCD, ZFS uses scalar instead of hardware accelerated SIMD instructions. As of zfs-linux 0.8.1-3 (unstable) and 0.8.1-4~bpo10+1 (buster- backports), Debian has "Cherry-pick e5db313 to fix the linux-SIMD compatibility" (https://tracker.debian.org/news/1065134/accepted-zfs- linux-081-4bpo101-source-amd64-all-into-buster-backports-buster- backports/). This fix will be included in 0.8.2, don't expect expect Eoan Ermine to move to that release. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1845018/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
