https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114978
--- Comment #30 from Tianyang Chou <tianyang.chou at gmail dot com> --- (In reply to Chen Chen from comment #27) > I am a bit confused with your statement. For AOSC gcc 13.2 I got 8.52 with > parameters "-g -Ofast -march=la464 -flto", and 8.76 with parameters "-g > -Ofast -march=la464". These results are similar to yours. > > For gcc 14 snapshot 20240317, currently I configure with the following > parameters: > > -enable-shared --enable-threads=posix --with-system-zlib > --enable-gnu-indirect-function --enable-__cxa_atexit > --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch > --disable-libssp --enable-gnu-unique-object --enable-linker-build-id > -enable-lto --enable-plugin --enable-install-libiberty --disable-multilib > --disable-werror --enable-pie --enable-checking=release > --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=new > --enable-default-pie --enable-default-ssp --enable-bootstrap > --enable-languages=c,c++,fortran,lto --with-abi=lp64d > --with-arch=loongarch64 --with-tune=la464 --build=loongarch64-aosc-linux-gnu > --program-suffix=-14.0.1 > > And still get a score of 12.8. > > > (In reply to Tianyang Chou from comment #24) > > (In reply to Chen Chen from comment #0) > > > We tested Loongarch64 CPU Loongson 3A6000 with "LA664" architecture in > > > Linux > > > operating system AOSC OS 11.4.0 (default gcc version is 13.2.0). And we > > > found the 548.exchange2_r benchmark from SPEC 2017 INTrate suite suffered > > > significant regressions from 14% to 28% with various compiling options. > > > > > > The rate-1 results are following: > > > > > > after snapshot 20240317 score 14.3-19.3% lower with parameters "-g -Ofast > > > -march=native": > > > 13.2.0: 11.7 (223s) [gcc 13.2.0, system default] > > > 20240317: 11.0 (237s) [gcc 14 snapshot 20240317] > > > 20240324: 8.88 (295s) [gcc 14 snapshot 20240324] > > > 20240430: 9.03 (290s) [gcc 14 snapshot 20240430, 14.1.0-RC] > > > 14.1.0: 9.43 (278s) [gcc 14.1.0 release] > > > > > > after snapshot 20240317 score 16.5-20.8% lower with parameters "-g -Ofast > > > -march=native -flto": > > > 13.2.0: 12.0 (218s) > > > 20240317: 10.6 (248s) > > > 20240324: 8.40 (312s) > > > 20240430: 8.48 (309s) > > > 14.1.0: 8.85 (296s) > > > > > > > > > after snapshot 20240317 score 18-23.1% lower with parameters "-g -Ofast > > > -march=la664": > > > 13.2.0: "-march=la664" flag is not supported > > > 20240317: 11.5 (227s) > > > 20240324: 8.84 (296s) > > > 20240430: 9.43 (278s) > > > 14.1.0: 9.42 (278s) > > > > > > > > > after snapshot 20240317 score 20.3-21.2% lower with parameters "-g -Ofast > > > -march=la664 -flto": > > > 13.2.0: "-march=la664" flag is not supported > > > 20240317: 11.1 (236s) > > > 20240324: 8.75 (299s) > > > 20240430: 8.85 (296s) > > > 14.1.0: 8.85 (296s) > > > > > > > > > after snapshot 20240317 score 26.3-26.6% lower with parameters "-g -Ofast > > > -march=la464": > > > 13.2.0: 8.76 (299s) > > > 20240317: 12.8 (205s) > > > 20240324: 9.39 (279s) > > > 20240430: 9.43 (278s) > > > 14.1.0: 9.43 (278s) > > > > > > > > > after snapshot 20240317 score 26.6-28% lower with parameters "-g -Ofast > > > -march=la464 -flto": > > > 13.2.0: 8.52 (307s) > > > 20240317: 12.8 (204s) > > > 20240324: 9.22 (284s) > > > 20240430: 9.37 (280s) > > > 14.1.0: 9.40 (279s) > > > > > > > > > The gcc 14 snapshots and gcc 14.1.0 are compiled with the following > > > parameters: > > > > > > --enable-shared --enable-threads=posix --with-system-zlib > > > --enable-gnu-indirect-function --enable-__cxa_atexit > > > --disable-libunwind-exceptions --enable-clocale=gnu > > > --disable-libstdcxx-pch > > > --disable-libssp --enable-gnu-unique-object --enable-linker-build-id > > > --enable-lto --enable-plugin --enable-install-libiberty --disable-multilib > > > --disable-werror --enable-pie --enable-checking=release > > > --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=new > > > --enable-default-pie --enable-default-ssp --enable-bootstrap > > > --enable-languages=c,c++,fortran,lto --with-abi=lp64d > > > --with-arch=loongarch64 --with-tune=la664 > > > --build=loongarch64-aosc-linux-gnu > > > > > > > > > The regression may be found on other types of CPUs as well. We did a quick > > > test on AMD Zen4 CPU R9 7940HS and found similar but smaller regression: > > > > > > The rate-1 results on x86_64 (AMD R9 7940HS) with operating system Debian > > > 12: > > > > > > after snapshot 20240317 score 8.6-9.6% lower with parameters "-m64 -g > > > -Ofast > > > -march=znver3": > > > 12.2.0: 30.1 (87.0s) [gcc 12.2.0, system default] > > > 13.2.0: 30.6 (85.7s) [gcc 13.2 release] > > > 20240317: 31.4 (83.3s) [gcc 14 snapshot] > > > 20240324: 28.7 (91.2s) [gcc 14 snapshot] > > > 20240430: 28.4 (92.2s) [gcc 14 snapshot, 14.1.0-RC] > > > > > > after snapshot 20240317 score 10% lower with parameters "-m64 -g -Ofast > > > -march=znver3 -flto": > > > 12.2.0: 29.0 (90.3s) > > > 13.2.0: 30.9 (84.9s) > > > 20240317: 32.0 (81.8s) > > > 20240324: 28.8 (90.9s) > > > 20240430: 28.8 (91.1s) > > > > > > gcc13 and gcc14 are compiled with the following parameters: > > > > > > --enable-shared --enable-threads=posix --with-system-zlib > > > --enable-gnu-indirect-function --enable-__cxa_atexit > > > --disable-libunwind-exceptions --enable-clocale=gnu > > > --disable-libstdcxx-pch > > > --disable-libssp --enable-gnu-unique-object --enable-linker-build-id > > > --enable-lto --enable-plugin --enable-install-libiberty --disable-multilib > > > --disable-werror --enable-pie --enable-checking=release > > > --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=new > > > --enable-default-pie --enable-default-ssp --enable-bootstrap > > > --enable-languages=c,c++,fortran,lto --build=x86_64-linux-gnu > > > --host=x86_64-linux-gnu --target=x86_64-linux-gnu > > > > Sorry to talk about something unrelated to this bug. I tried running 548 on > > CPU loongson 3A6000 with the same compiler version and compiler options as > > you but the score is only 8.5, so could you please tell me what am I > > missing? I just can't reproduce your performance result. > > > > The gcc compiler source code is downloaded from the github repo > > AOSC-Tracking/gcc(13.2.0), configure it with parameters: > > > > "--enable-shared --enable-threads=posix --with-system-zlib > > --enable-gnu-indirect-function --enable-__cxa_atexit > > --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch > > --disable-libssp --enable-gnu-unique-object --enable-linker-build-id > > --enable-lto --enable-plugin --enable-install-libiberty --disable-multilib > > --disable-werror --enable-pie --enable-checking=release > > --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=new > > --enable-default-pie --enable-default-ssp --enable-bootstrap > > --enable-languages=c,c++,fortran,lto --with-abi=lp64d > > --with-arch=loongarch64 --with-tune=la664 > > --build=loongarch64-aosc-linux-gnu" > > (In reply to Tianyang Chou from comment #24) > > (In reply to Chen Chen from comment #0) > > > We tested Loongarch64 CPU Loongson 3A6000 with "LA664" architecture in > > > Linux > > > operating system AOSC OS 11.4.0 (default gcc version is 13.2.0). And we > > > found the 548.exchange2_r benchmark from SPEC 2017 INTrate suite suffered > > > significant regressions from 14% to 28% with various compiling options. > > > > > > The rate-1 results are following: > > > > > > after snapshot 20240317 score 14.3-19.3% lower with parameters "-g -Ofast > > > -march=native": > > > 13.2.0: 11.7 (223s) [gcc 13.2.0, system default] > > > 20240317: 11.0 (237s) [gcc 14 snapshot 20240317] > > > 20240324: 8.88 (295s) [gcc 14 snapshot 20240324] > > > 20240430: 9.03 (290s) [gcc 14 snapshot 20240430, 14.1.0-RC] > > > 14.1.0: 9.43 (278s) [gcc 14.1.0 release] > > > > > > after snapshot 20240317 score 16.5-20.8% lower with parameters "-g -Ofast > > > -march=native -flto": > > > 13.2.0: 12.0 (218s) > > > 20240317: 10.6 (248s) > > > 20240324: 8.40 (312s) > > > 20240430: 8.48 (309s) > > > 14.1.0: 8.85 (296s) > > > > > > > > > after snapshot 20240317 score 18-23.1% lower with parameters "-g -Ofast > > > -march=la664": > > > 13.2.0: "-march=la664" flag is not supported > > > 20240317: 11.5 (227s) > > > 20240324: 8.84 (296s) > > > 20240430: 9.43 (278s) > > > 14.1.0: 9.42 (278s) > > > > > > > > > after snapshot 20240317 score 20.3-21.2% lower with parameters "-g -Ofast > > > -march=la664 -flto": > > > 13.2.0: "-march=la664" flag is not supported > > > 20240317: 11.1 (236s) > > > 20240324: 8.75 (299s) > > > 20240430: 8.85 (296s) > > > 14.1.0: 8.85 (296s) > > > > > > > > > after snapshot 20240317 score 26.3-26.6% lower with parameters "-g -Ofast > > > -march=la464": > > > 13.2.0: 8.76 (299s) > > > 20240317: 12.8 (205s) > > > 20240324: 9.39 (279s) > > > 20240430: 9.43 (278s) > > > 14.1.0: 9.43 (278s) > > > > > > > > > after snapshot 20240317 score 26.6-28% lower with parameters "-g -Ofast > > > -march=la464 -flto": > > > 13.2.0: 8.52 (307s) > > > 20240317: 12.8 (204s) > > > 20240324: 9.22 (284s) > > > 20240430: 9.37 (280s) > > > 14.1.0: 9.40 (279s) > > > > > > > > > The gcc 14 snapshots and gcc 14.1.0 are compiled with the following > > > parameters: > > > > > > --enable-shared --enable-threads=posix --with-system-zlib > > > --enable-gnu-indirect-function --enable-__cxa_atexit > > > --disable-libunwind-exceptions --enable-clocale=gnu > > > --disable-libstdcxx-pch > > > --disable-libssp --enable-gnu-unique-object --enable-linker-build-id > > > --enable-lto --enable-plugin --enable-install-libiberty --disable-multilib > > > --disable-werror --enable-pie --enable-checking=release > > > --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=new > > > --enable-default-pie --enable-default-ssp --enable-bootstrap > > > --enable-languages=c,c++,fortran,lto --with-abi=lp64d > > > --with-arch=loongarch64 --with-tune=la664 > > > --build=loongarch64-aosc-linux-gnu > > > > > > > > > The regression may be found on other types of CPUs as well. We did a quick > > > test on AMD Zen4 CPU R9 7940HS and found similar but smaller regression: > > > > > > The rate-1 results on x86_64 (AMD R9 7940HS) with operating system Debian > > > 12: > > > > > > after snapshot 20240317 score 8.6-9.6% lower with parameters "-m64 -g > > > -Ofast > > > -march=znver3": > > > 12.2.0: 30.1 (87.0s) [gcc 12.2.0, system default] > > > 13.2.0: 30.6 (85.7s) [gcc 13.2 release] > > > 20240317: 31.4 (83.3s) [gcc 14 snapshot] > > > 20240324: 28.7 (91.2s) [gcc 14 snapshot] > > > 20240430: 28.4 (92.2s) [gcc 14 snapshot, 14.1.0-RC] > > > > > > after snapshot 20240317 score 10% lower with parameters "-m64 -g -Ofast > > > -march=znver3 -flto": > > > 12.2.0: 29.0 (90.3s) > > > 13.2.0: 30.9 (84.9s) > > > 20240317: 32.0 (81.8s) > > > 20240324: 28.8 (90.9s) > > > 20240430: 28.8 (91.1s) > > > > > > gcc13 and gcc14 are compiled with the following parameters: > > > > > > --enable-shared --enable-threads=posix --with-system-zlib > > > --enable-gnu-indirect-function --enable-__cxa_atexit > > > --disable-libunwind-exceptions --enable-clocale=gnu > > > --disable-libstdcxx-pch > > > --disable-libssp --enable-gnu-unique-object --enable-linker-build-id > > > --enable-lto --enable-plugin --enable-install-libiberty --disable-multilib > > > --disable-werror --enable-pie --enable-checking=release > > > --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=new > > > --enable-default-pie --enable-default-ssp --enable-bootstrap > > > --enable-languages=c,c++,fortran,lto --build=x86_64-linux-gnu > > > --host=x86_64-linux-gnu --target=x86_64-linux-gnu > > > > Sorry to talk about something unrelated to this bug. I tried running 548 on > > CPU loongson 3A6000 with the same compiler version and compiler options as > > you but the score is only 8.5, so could you please tell me what am I > > missing? I just can't reproduce your performance result. > > > > The gcc compiler source code is downloaded from the github repo > > AOSC-Tracking/gcc(13.2.0), configure it with parameters: > > > > "--enable-shared --enable-threads=posix --with-system-zlib > > --enable-gnu-indirect-function --enable-__cxa_atexit > > --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch > > --disable-libssp --enable-gnu-unique-object --enable-linker-build-id > > --enable-lto --enable-plugin --enable-install-libiberty --disable-multilib > > --disable-werror --enable-pie --enable-checking=release > > --enable-libstdcxx-dual-abi --with-default-libstdcxx-abi=new > > --enable-default-pie --enable-default-ssp --enable-bootstrap > > --enable-languages=c,c++,fortran,lto --with-abi=lp64d > > --with-arch=loongarch64 --with-tune=la664 > > --build=loongarch64-aosc-linux-gnu" I mean score 8.5 for GCC-13.2.0 is not as expected, instead it should be 11.7 which mentioned in Comment 1: 13.2.0: 11.7 (223s) [gcc 13.2.0, system default] but the problem solved for me now as I apply the patch(Comment 19) to GCC-13.2.0 and the performance increase to 11.7.
