ARM vs Thumb GCC comparison

ARMv7 codegen impact of ARM/Thumb mode in GCC 4.9, 7.1, 8.0

Compare your own system(s) to this result file with the Phoronix Test Suite by running the command: phoronix-test-suite benchmark 1705048-RI-MERGE366949
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GCC 7.1 thumb #1
May 02 2017
 
GCC 7.1 arm #1
May 03 2017
 
GCC 8.0 thumb #1
May 03 2017
 
GCC 8.0 arm #1
May 03 2017
 
GCC 4.9 thumb #1
May 03 2017
 
GCC 4.9 arm #1
May 03 2017
 
GCC 4.9 thumb #2
May 04 2017
 
GCC 4.9 arm #2
May 03 2017
 
GCC 7.1 thumb #2
May 02 2017
 
GCC 7.1 arm #2
May 02 2017
 
GCC 8.0 thumb #2
May 03 2017
 
GCC 8.0 arm #2
May 01 2017
 
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ARM vs Thumb GCC comparison - Phoronix Test Suite

ARM vs Thumb GCC comparison

ARMv7 codegen impact of ARM/Thumb mode in GCC 4.9, 7.1, 8.0

HTML result view exported from: https://openbenchmarking.org/result/1705048-RI-MERGE366949&grw&export=pdf&sor.

ARM vs Thumb GCC comparisonProcessorMotherboardMemoryDiskGraphicsOSKernelDisplay ServerCompilerFile-SystemScreen ResolutionGCC 7.1 thumb #1GCC 7.1 arm #1GCC 8.0 thumb #1GCC 8.0 arm #1GCC 4.9 thumb #1GCC 4.9 arm #1GCC 4.9 thumb #2GCC 4.9 arm #2GCC 7.1 thumb #2GCC 7.1 arm #2GCC 8.0 thumb #2GCC 8.0 arm #2ARMv7 rev 1 @ 1.73GHz (4 Cores)ODROIDC915MB64GB 00000ARM MaliUbuntu 14.043.10.80-20-odrobian (armv7l)X Server 1.15.1GCC 7.0.1 20170422 + Clang 3.6.0-2ubuntu1~trusty1 + LLVM 3.6.0ext41280x1024GCC 8.0.0 20170501 + Clang 3.6.0-2ubuntu1~trusty1 + LLVM 3.6.0GCC 4.9.4 + Clang 3.6.0-2ubuntu1~trusty1 + LLVM 3.6.0GCC 7.0.1 20170422 + Clang 3.6.0-2ubuntu1~trusty1 + LLVM 3.6.0GCC 8.0.0 20170501 + Clang 3.6.0-2ubuntu1~trusty1 + LLVM 3.6.0OpenBenchmarking.orgCompiler Details- GCC 7.1 thumb #1: --build=arm-linux-gnueabihf --disable-bootstrap --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-libstdcxx-dual-abi --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-default-libstdcxx-abi=gcc4-compatible --with-float=hard --with-fpu=vfpv3 --with-mode=arm -v - GCC 7.1 arm #1: --build=arm-linux-gnueabihf --disable-bootstrap --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-libstdcxx-dual-abi --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-default-libstdcxx-abi=gcc4-compatible --with-float=hard --with-fpu=vfpv3 --with-mode=arm -v - GCC 8.0 thumb #1: --build=arm-linux-gnueabihf --disable-bootstrap --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-libstdcxx-dual-abi --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-default-libstdcxx-abi=gcc4-compatible --with-float=hard --with-fpu=vfpv3 --with-mode=arm -v - GCC 8.0 arm #1: --build=arm-linux-gnueabihf --disable-bootstrap --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-libstdcxx-dual-abi --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-default-libstdcxx-abi=gcc4-compatible --with-float=hard --with-fpu=vfpv3 --with-mode=arm -v - GCC 4.9 thumb #1: --build=arm-linux-gnueabihf --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-gtk-cairo --enable-java-awt=gtk --enable-java-home --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v - GCC 4.9 arm #1: --build=arm-linux-gnueabihf --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-gtk-cairo --enable-java-awt=gtk --enable-java-home --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v - GCC 4.9 thumb #2: --build=arm-linux-gnueabihf --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-gtk-cairo --enable-java-awt=gtk --enable-java-home --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v - GCC 4.9 arm #2: --build=arm-linux-gnueabihf --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-gtk-cairo --enable-java-awt=gtk --enable-java-home --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v - GCC 7.1 thumb #2: --build=arm-linux-gnueabihf --disable-bootstrap --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-libstdcxx-dual-abi --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-default-libstdcxx-abi=gcc4-compatible --with-float=hard --with-fpu=vfpv3 --with-mode=arm -v - GCC 7.1 arm #2: --build=arm-linux-gnueabihf --disable-bootstrap --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-libstdcxx-dual-abi --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-default-libstdcxx-abi=gcc4-compatible --with-float=hard --with-fpu=vfpv3 --with-mode=arm -v - GCC 8.0 thumb #2: --build=arm-linux-gnueabihf --disable-bootstrap --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-libstdcxx-dual-abi --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-default-libstdcxx-abi=gcc4-compatible --with-float=hard --with-fpu=vfpv3 --with-mode=arm -v - GCC 8.0 arm #2: --build=arm-linux-gnueabihf --disable-bootstrap --disable-browser-plugin --disable-libitm --disable-libquadmath --disable-libstdcxx-dual-abi --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-multilib --enable-nls --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch-directory=arm --with-arch=armv7-a --with-default-libstdcxx-abi=gcc4-compatible --with-float=hard --with-fpu=vfpv3 --with-mode=arm -v Processor Details- Scaling Governor: meson_cpufreq performance

ARM vs Thumb GCC comparisontscp: AI Chess Performancescimark2: Compositescimark2: Monte Carloscimark2: Fast Fourier Transformscimark2: Sparse Matrix Multiplyscimark2: Dense LU Matrix Factorizationscimark2: Jacobi Successive Over-Relaxationhimeno: Poisson Pressure Solvern-queens: Elapsed Timeprimesieve: 1e12 Prime Number Generationstockfish: Total Timetachyon: Total Timec-ray: Total Timettsiod-renderer: Phong Rendering With Soft-Shadow Mappingsmallpt: Global Illumination Renderer; 100 SamplesGCC 7.1 thumb #1GCC 7.1 arm #1GCC 8.0 thumb #1GCC 8.0 arm #1GCC 4.9 thumb #1GCC 4.9 arm #1GCC 4.9 thumb #2GCC 4.9 arm #2GCC 7.1 thumb #2GCC 7.1 arm #2GCC 8.0 thumb #2GCC 8.0 arm #2186603102.6758.1122.8898.19115.42218.7288.14195.851025.3543893109.82244.3615.62285189365104.6467.7022.2998.18115.53219.4879.09201.241027.1651235108.99245.3315.86284185241104.0558.1421.0799.02116.86225.1784.18195.831028.3743547109.73243.3816.52285190842103.4667.1922.4597.00114.10216.5662.49201.301028.0252205109.52243.7615.83285179364100.3056.9521.3298.24124.60200.4091.27185.41877.1541922110.57265.6915.5628418705899.9764.5622.6497.15122.69192.8081.69227.371029.4353864108.87266.7415.79284OpenBenchmarking.org

TSCP

AI Chess Performance

OpenBenchmarking.orgNodes Per Second, More Is BetterTSCP 1.81AI Chess PerformanceGCC 8.0 arm #1GCC 7.1 arm #1GCC 4.9 arm #1GCC 7.1 thumb #1GCC 8.0 thumb #1GCC 4.9 thumb #140K80K120K160K200KSE +/- 1539.07, N = 5SE +/- 1793.38, N = 5SE +/- 1704.24, N = 5SE +/- 1317.11, N = 5SE +/- 1601.83, N = 5SE +/- 1328.11, N = 5190842189365187058186603185241179364-marm-marm-marm-mthumb-mthumb-mthumb1. (CC) gcc options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -O3 -march=native

SciMark

Computational Test: Composite

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: CompositeGCC 7.1 arm #1GCC 8.0 thumb #1GCC 8.0 arm #1GCC 7.1 thumb #1GCC 4.9 thumb #1GCC 4.9 arm #120406080100SE +/- 1.08, N = 4SE +/- 1.07, N = 4SE +/- 1.35, N = 4SE +/- 1.09, N = 4SE +/- 1.12, N = 4SE +/- 1.17, N = 4104.64104.05103.46102.67100.3099.97-marm-mthumb-marm-mthumb-mthumb-marm1. (CC) gcc options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -lm

SciMark

Computational Test: Monte Carlo

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Monte CarloGCC 7.1 arm #1GCC 8.0 arm #1GCC 4.9 arm #1GCC 8.0 thumb #1GCC 7.1 thumb #1GCC 4.9 thumb #11530456075SE +/- 0.49, N = 4SE +/- 0.60, N = 4SE +/- 0.56, N = 4SE +/- 0.44, N = 4SE +/- 0.43, N = 4SE +/- 0.47, N = 467.7067.1964.5658.1458.1156.95-marm-marm-marm-mthumb-mthumb-mthumb1. (CC) gcc options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -lm

SciMark

Computational Test: Fast Fourier Transform

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Fast Fourier TransformGCC 7.1 thumb #1GCC 4.9 arm #1GCC 8.0 arm #1GCC 7.1 arm #1GCC 4.9 thumb #1GCC 8.0 thumb #1510152025SE +/- 0.18, N = 4SE +/- 0.24, N = 4SE +/- 0.21, N = 4SE +/- 0.17, N = 4SE +/- 0.32, N = 4SE +/- 0.17, N = 422.8822.6422.4522.2921.3221.07-mthumb-marm-marm-marm-mthumb-mthumb1. (CC) gcc options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -lm

SciMark

Computational Test: Sparse Matrix Multiply

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Sparse Matrix MultiplyGCC 8.0 thumb #1GCC 4.9 thumb #1GCC 7.1 thumb #1GCC 7.1 arm #1GCC 4.9 arm #1GCC 8.0 arm #120406080100SE +/- 1.20, N = 4SE +/- 1.21, N = 4SE +/- 1.12, N = 4SE +/- 1.13, N = 4SE +/- 1.31, N = 4SE +/- 1.37, N = 499.0298.2498.1998.1897.1597.00-mthumb-mthumb-mthumb-marm-marm-marm1. (CC) gcc options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -lm

SciMark

Computational Test: Dense LU Matrix Factorization

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Dense LU Matrix FactorizationGCC 4.9 thumb #1GCC 4.9 arm #1GCC 8.0 thumb #1GCC 7.1 arm #1GCC 7.1 thumb #1GCC 8.0 arm #1306090120150SE +/- 1.39, N = 4SE +/- 1.56, N = 4SE +/- 1.44, N = 4SE +/- 1.25, N = 4SE +/- 1.27, N = 4SE +/- 1.55, N = 4124.60122.69116.86115.53115.42114.10-mthumb-marm-mthumb-marm-mthumb-marm1. (CC) gcc options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -lm

SciMark

Computational Test: Jacobi Successive Over-Relaxation

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Jacobi Successive Over-RelaxationGCC 8.0 thumb #1GCC 7.1 arm #1GCC 7.1 thumb #1GCC 8.0 arm #1GCC 4.9 thumb #1GCC 4.9 arm #150100150200250SE +/- 2.33, N = 4SE +/- 2.37, N = 4SE +/- 2.47, N = 4SE +/- 3.03, N = 4SE +/- 2.23, N = 4SE +/- 2.19, N = 4225.17219.48218.72216.56200.40192.80-mthumb-marm-mthumb-marm-mthumb-marm1. (CC) gcc options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -lm

Himeno Benchmark

Poisson Pressure Solver

OpenBenchmarking.orgMFLOPS, More Is BetterHimeno Benchmark 3.0Poisson Pressure SolverGCC 4.9 thumb #1GCC 7.1 thumb #1GCC 8.0 thumb #1GCC 4.9 arm #1GCC 7.1 arm #1GCC 8.0 arm #120406080100SE +/- 1.21, N = 3SE +/- 0.23, N = 3SE +/- 1.59, N = 3SE +/- 0.96, N = 3SE +/- 1.02, N = 3SE +/- 1.31, N = 691.2788.1484.1881.6979.0962.49-mthumb-mthumb-mthumb-marm-marm-marm1. (CC) gcc options: -O3 -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers

N-Queens

Elapsed Time

OpenBenchmarking.orgSeconds, Fewer Is BetterN-Queens 1.0Elapsed TimeGCC 4.9 thumb #1GCC 8.0 thumb #1GCC 7.1 thumb #1GCC 7.1 arm #1GCC 8.0 arm #1GCC 4.9 arm #150100150200250SE +/- 0.01, N = 3SE +/- 0.02, N = 3SE +/- 0.01, N = 3SE +/- 0.02, N = 3SE +/- 0.06, N = 3SE +/- 0.01, N = 3185.41195.83195.85201.24201.30227.37-mthumb-mthumb-mthumb-marm-marm-marm1. (CC) gcc options: -static -fopenmp -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -O3 -march=native

Primesieve

1e12 Prime Number Generation

OpenBenchmarking.orgSeconds, Fewer Is BetterPrimesieve 5.4.21e12 Prime Number GenerationGCC 4.9 thumb #1GCC 7.1 thumb #1GCC 7.1 arm #1GCC 8.0 arm #1GCC 8.0 thumb #1GCC 4.9 arm #12004006008001000SE +/- 3.08, N = 3SE +/- 5.98, N = 3SE +/- 0.31, N = 3SE +/- 5.44, N = 3SE +/- 1.95, N = 3SE +/- 10.97, N = 3877.151025.351027.161028.021028.371029.43-mthumb-mthumb-marm-marm-mthumb-marm1. (CXX) g++ options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -fopenmp

Stockfish

Total Time

OpenBenchmarking.orgms, Fewer Is BetterStockfish 2014-11-26Total TimeGCC 4.9 thumb #1GCC 8.0 thumb #1GCC 7.1 thumb #1GCC 7.1 arm #1GCC 8.0 arm #1GCC 4.9 arm #112K24K36K48K60KSE +/- 122.93, N = 3SE +/- 710.15, N = 3SE +/- 663.13, N = 6SE +/- 58.33, N = 3SE +/- 221.70, N = 3SE +/- 60.67, N = 3419224354743893512355220553864-mthumb-mthumb-mthumb-marm-marm-marm1. (CXX) g++ options: -lpthread -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -fno-exceptions -fno-rtti -ansi -pedantic -O3 -flto

Tachyon

Total Time

OpenBenchmarking.orgSeconds, Fewer Is BetterTachyon 0.98.9Total TimeGCC 4.9 arm #1GCC 7.1 arm #1GCC 8.0 arm #1GCC 8.0 thumb #1GCC 7.1 thumb #1GCC 4.9 thumb #120406080100SE +/- 0.13, N = 3SE +/- 0.39, N = 3SE +/- 0.28, N = 3SE +/- 0.36, N = 3SE +/- 0.45, N = 3SE +/- 0.36, N = 3108.87108.99109.52109.73109.82110.57

C-Ray

Total Time

OpenBenchmarking.orgSeconds, Fewer Is BetterC-Ray 1.1Total TimeGCC 8.0 thumb #1GCC 8.0 arm #1GCC 7.1 thumb #1GCC 7.1 arm #1GCC 4.9 thumb #1GCC 4.9 arm #160120180240300SE +/- 0.19, N = 3SE +/- 0.22, N = 3SE +/- 0.30, N = 3SE +/- 1.31, N = 3SE +/- 1.04, N = 3SE +/- 1.92, N = 3243.38243.76244.36245.33265.69266.74-mthumb-marm-mthumb-marm-mthumb-marm1. (CC) gcc options: -lm -lpthread -O3 -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers

TTSIOD 3D Renderer

Phong Rendering With Soft-Shadow Mapping

OpenBenchmarking.orgFPS, More Is BetterTTSIOD 3D Renderer 2.3aPhong Rendering With Soft-Shadow MappingGCC 8.0 thumb #1GCC 7.1 arm #1GCC 8.0 arm #1GCC 4.9 arm #1GCC 7.1 thumb #1GCC 4.9 thumb #148121620SE +/- 0.02, N = 3SE +/- 0.02, N = 3SE +/- 0.02, N = 2SE +/- 0.08, N = 316.5215.8615.8315.7915.6215.56-mthumb-marm-marm-marm-mthumb1. (CXX) g++ options: -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers -ffast-math -mtune=native -flto -lSDL -lstdc++

Smallpt

Global Illumination Renderer; 100 Samples

OpenBenchmarking.orgSeconds, Fewer Is BetterSmallpt 1.0Global Illumination Renderer; 100 SamplesGCC 4.9 thumb #1GCC 4.9 arm #1GCC 7.1 arm #1GCC 7.1 thumb #1GCC 8.0 thumb #1GCC 8.0 arm #160120180240300SE +/- 0.58, N = 3SE +/- 0.33, N = 3SE +/- 1.53, N = 3284284284285285285-mthumb-marm-marm-mthumb-mthumb-marm1. (CXX) g++ options: -fopenmp -mcpu=cortex-a5 -Ofast -fomit-frame-pointer -fipa-pta -mfpu=neon-vfpv4 -ftree-vectorize -frename-registers

Phoronix Test Suite v10.8.4