GCC optimization comparison
HTML result view exported from: https://openbenchmarking.org/result/1410228-KH-HIMENOGCC29.
Testing GCC optimization flags (Himeno)ProcessorMotherboardChipsetMemoryDiskGraphicsAudioNetworkOSKernelDesktopDisplay DriverCompilerFile-SystemScreen Resolutiongcc_o0gcc_O1gcc_O2gcc_O3gcc_OsAMD E-450 APU @ 1.65GHz (2 Cores)ASUS K73BR v1.0AMD Family 14h Root Complex4096MB320GB Western Digital WD3200BPVT-8ASUS AMD Radeon HD 6400M/7400M 1024MBAMD SBx00 AzaliaRealtek RTL8111/8168/8411 + Qualcomm Atheros AR9285 WirelessArch rolling3.16.6-2-ck (x86_64)KDE Frameworks 5radeon 7.5.0GCC 4.9.1 20140903 + Clang 3.5.0 + LLVM 3.5.0btrfs1600x900OpenBenchmarking.orgKernel Details- radeon.modeset=1Compiler Details- --disable-cloog-version-check --disable-isl-version-check --disable-libssp --disable-libstdcxx-pch --disable-libunwind-exceptions --disable-werror --enable-__cxa_atexit --enable-checking=release --enable-clocale=gnu --enable-cloog-backend=isl --enable-gnu-unique-object --enable-install-libiberty --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-lto --enable-multilib --enable-plugin --enable-shared --enable-threads=posix --mandir=/usr/share/man --with-linker-hash-style=gnu Processor Details- Scaling Governor: acpi-cpufreq ondemand
Testing GCC optimization flags (Himeno)himeno: Poisson Pressure SolverDifferenceStandard ErrorStandard Deviationgcc_o0gcc_O1gcc_O2gcc_O3gcc_Os54.301.00x0.953.48%154.752.85x2.593.34%244.524.50x3.413.42%249.804.60x3.783.38%149.612.76x1.932.24%OpenBenchmarking.org
OpenBenchmarking.orgMFLOPS, More Is BetterHimeno Benchmark 3.0Poisson Pressure Solvergcc_o0gcc_O1gcc_O2gcc_O3gcc_Os50100150200250SE +/- 0.95, N = 4SE +/- 2.59, N = 4SE +/- 3.41, N = 6SE +/- 3.78, N = 5SE +/- 1.93, N = 354.30154.75244.52249.80149.61-O0-O1-O2-Os1. (CC) gcc options: -O3
Phoronix Test Suite v10.8.4