On Sat, Feb 22, 2020 at 09:24:14AM -0500, Alex Xu (Hello71) wrote: > Excerpts from Nathan Chancellor's message of February 22, 2020 3:01 am: > > I used hyperfine [1] to run a quick benchmark with a freshly built > > GCC 9.2.0 for x86 and aarch64 and here are the results: > > > > In both cases it seems like performance regresses (by 1% but still) but > > maybe it is my machine, even though this benchmark was done on a > > different machine than the one from my commit back in 2018. > > > > I am not sure I would write off these results, since I did the benchmark > > 25 times on each one back to back, eliminating most of the variance that > > you described. > > > > [1]: https://github.com/sharkdp/hyperfine > > > > Cheers, > > Nathan > > > > What kernel version are you running? Do you have the 5.6 pipe reworks? No, it is a stock Ubuntu 18.04 kernel, which is running 4.15.0. $ uname -a Linux c2-medium-x86 4.15.0-50-generic #54-Ubuntu SMP Mon May 6 18:46:08 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux If you are curious about the specs: $ neofetch --stdout nathan@c2-medium-x86 -------------------- OS: Ubuntu 18.04.3 LTS x86_64 Host: PowerEdge R6415 Kernel: 4.15.0-50-generic Uptime: 126 days, 12 hours, 39 mins Packages: 686 Shell: zsh 5.4.2 Terminal: /dev/pts/0 CPU: AMD EPYC 7401P 24- (48) @ 2.794GHz Memory: 2974MiB / 64018MiB Cheers, Nathan
