Hi Richard, Heads up, our benchmarking CI flagged your commit to cause 23% regression in 549.fotonik3d_r on Cortex-A57 at -O3.
Do you have internal benchmarks for this change? Thanks! -- Maxim Kuvyrkov https://www.linaro.org > On Mar 24, 2024, at 03:43, ci_not...@linaro.org wrote: > > Dear contributor, our automatic CI has detected problems related to your > patch(es). Please find some details below. If you have any questions, > please follow up on linaro-toolchain@lists.linaro.org mailing list, Libera's > #linaro-tcwg channel, or ping your favourite Linaro toolchain developer on > the usual project channel. > > We appreciate that it might be difficult to find the necessary logs or > reproduce the issue locally. If you can't get what you need from our CI > within minutes, let us know and we will be happy to help. > > We track this report status in https://linaro.atlassian.net/browse/GNU-1181 , > please let us know if you are looking at the problem and/or when you have a > fix. > > In CI config tcwg_bmk-code_speed-cpu2017rate/gnu-aarch64-master-O3 after: > > | commit gcc-14-9157-gff442719cdb > | Author: Richard Sandiford <richard.sandif...@arm.com> > | Date: Fri Feb 23 14:12:55 2024 +0000 > | > | aarch64: Spread out FPR usage between RA regions [PR113613] > | > | early-ra already had code to do regrename-style "broadening" > | of the allocation, to promote scheduling freedom. However, > | the pass divides the function into allocation regions > | and this broadening only worked within a single region. > | This meant that if a basic block contained one subblock > | ... 30 lines of the commit log omitted. > > the following benchmarks slowed down by more than 3%: > - slowed down by 23% - 549.fotonik3d_r - from 16467 to 20213 perf samples > the following hot functions slowed down by more than 15% (but their > benchmarks slowed down by less than 3%): > - slowed down by 88% - 549.fotonik3d_r:[.] __material_mod_MOD_mat_updatee - > from 4373 to 8204 perf samples > > The configuration of this build is: > Below reproducer instructions can be used to re-build both "first_bad" and > "last_good" cross-toolchains used in this bisection. Naturally, the scripts > will fail when triggerring benchmarking jobs if you don\'t have access to > Linaro TCWG CI. > > Configuration: > - Benchmark: SPEC CPU2017 > - Toolchain: GCC + Glibc + GNU Linker > - Version: all components were built from their tip of trunk > - Target: aarch64-linux-gnu > - Compiler flags: O3 > - Hardware: NVidia TX1 4x Cortex-A57 > > This benchmarking CI is work-in-progress, and we welcome feedback and > suggestions at linaro-toolchain@lists.linaro.org . In our improvement plans > is to add support for SPEC CPU2017 benchmarks and provide "perf > report/annotate" data behind these reports. > > -----------------8<--------------------------8<--------------------------8<-------------------------- > The information below can be used to reproduce a debug environment: > > Current build : > https://ci.linaro.org/job/tcwg_bmk-code_speed-cpu2017rate--gnu-aarch64-master-O3-build/199/artifact/artifacts > Reference build : > https://ci.linaro.org/job/tcwg_bmk-code_speed-cpu2017rate--gnu-aarch64-master-O3-build/198/artifact/artifacts > > Reproduce last good and first bad builds: > https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/ff442719cdb64c9df9d069af88e90d51bee6fb56/tcwg_bmk-code_speed-cpu2017rate/gnu-aarch64-master-O3/reproduction_instructions.txt > > Full commit : > https://github.com/gcc-mirror/gcc/commit/ff442719cdb64c9df9d069af88e90d51bee6fb56 > > List of configurations that regressed due to this commit : > * tcwg_bmk-code_speed-cpu2017rate > ** gnu-aarch64-master-O3 > *** slowed down by 23% - 549.fotonik3d_r > *** > https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/ff442719cdb64c9df9d069af88e90d51bee6fb56/tcwg_bmk-code_speed-cpu2017rate/gnu-aarch64-master-O3/details.txt > *** > https://ci.linaro.org/job/tcwg_bmk-code_speed-cpu2017rate--gnu-aarch64-master-O3-build/199/artifact/artifacts _______________________________________________ linaro-toolchain mailing list -- linaro-toolchain@lists.linaro.org To unsubscribe send an email to linaro-toolchain-le...@lists.linaro.org
