LLVM Clang vs. GCC On ARM Cortex-A15

ARM Cortex-A15 compiler benchmarks of GCC 4.6, 4.7, and 4.8 compared to LLVM/Clang 3.0 on the Samsung Chromebook with Samsung Exynos 5 Dual. Benchmarks for a future article on Phoronix.com.

Compare your own system(s) to this result file with the Phoronix Test Suite by running the command: phoronix-test-suite benchmark 1212019-RA-LLVMCLANG39
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GCC 4.6.3
December 01 2012
 
GCC 4.7.2
December 01 2012
 
GCC 4.8.0 SVN
December 01 2012
 
LLVM Clang 3.0
November 30 2012
 
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LLVM Clang 3.0

Processor: Exynos ARMv7 rev 4 @ 1.70GHz (2 Cores), Motherboard: SAMSUNG EXYNOS5 (Flattened Device Tree), Memory: 2048MB, Disk: 16GB SEM16G

OS: Ubuntu 12.04, Kernel: 3.4.0 (armv7l), Desktop: Unity 2D 5.16.0, Display Server: X Server 1.11.3, Compiler: Clang 3.0-6ubuntu3, File-System: ext4, Screen Resolution: 1366x768

Processor Notes: Scaling Governor: ondemand

GCC 4.7.2

OS: Ubuntu 12.04, Kernel: 3.4.0 (armv7l), Desktop: Unity 2D 5.16.0, Display Server: X Server 1.11.3, Compiler: GCC 4.7, File-System: ext4, Screen Resolution: 1366x768

Compiler Notes: --build=arm-linux-gnueabihf --disable-libitm --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,go,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v
Processor Notes: Scaling Governor: ondemand

GCC 4.8.0 SVN

OS: Ubuntu 12.04, Kernel: 3.4.0 (armv7l), Desktop: Unity 2D 5.16.0, Display Server: X Server 1.11.3, Compiler: GCC 4.8.0 20121008, File-System: ext4, Screen Resolution: 1366x768

Compiler Notes: --build=arm-linux-gnueabihf --disable-libitm --disable-nls --disable-sjlj-exceptions --disable-werror --enable-checking=yes --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,ada,c++,go,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-plugin --enable-shared --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v
Processor Notes: Scaling Governor: ondemand

GCC 4.6.3

OS: Ubuntu 12.04, Kernel: 3.4.0 (armv7l), Desktop: Unity 2D 5.16.0, Display Server: X Server 1.11.3, Compiler: GCC 4.6, File-System: ext4, Screen Resolution: 1366x768

Compiler Notes: --build=arm-linux-gnueabihf --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v
Processor Notes: Scaling Governor: ondemand

LLVM Clang vs. GCC On ARM Cortex-A15OpenBenchmarking.orgPhoronix Test SuiteExynos ARMv7 rev 4 @ 1.70GHz (2 Cores)SAMSUNG EXYNOS5 (Flattened Device Tree)2048MB16GB SEM16GUbuntu 12.043.4.0 (armv7l)Unity 2D 5.16.0X Server 1.11.3Clang 3.0-6ubuntu3GCC 4.7GCC 4.8.0 20121008GCC 4.6ext41366x768ProcessorMotherboardMemoryDiskOSKernelDesktopDisplay ServerCompilersFile-SystemScreen ResolutionLLVM Clang Vs. GCC On ARM Cortex-A15 BenchmarksSystem Logs- Scaling Governor: ondemand- GCC 4.7.2: --build=arm-linux-gnueabihf --disable-libitm --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,go,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v - GCC 4.8.0 SVN: --build=arm-linux-gnueabihf --disable-libitm --disable-nls --disable-sjlj-exceptions --disable-werror --enable-checking=yes --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,ada,c++,go,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-plugin --enable-shared --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v - GCC 4.6.3: --build=arm-linux-gnueabihf --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v

LLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.3Result OverviewPhoronix Test Suite100%127%155%182%209%GraphicsMagickGraphicsMagickGraphicsMagickPrimesieveGraphicsMagickC-RayGraphicsMagickTimed HMMer SearchTimed MrBayes AnalysisSharpenResizingL.A.T1.P.N.GBlurTotal TimeHWB Color SpaceP.D.SP.P.A

LLVM Clang vs. GCC On ARM Cortex-A15hmmer: Pfam Database Searchmrbayes: Primate Phylogeny Analysisgraphics-magick: Blurgraphics-magick: Sharpengraphics-magick: Resizinggraphics-magick: HWB Color Spacegraphics-magick: Local Adaptive Thresholdingc-ray: Total Timeprimesieve: 1e12 Prime Number GenerationLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.3131.65226.501911223913508.531507.90114.98200.223223404723313.32866.18124.65197.953223404723313.27886.19124.30201.623223405022435.43883.94OpenBenchmarking.org

Timed HMMer Search

This test searches through the Pfam database of profile hidden markov models. The search finds the domain structure of Drosophila Sevenless protein. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgSeconds, Fewer Is BetterTimed HMMer Search 2.3.2Pfam Database SearchLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.3306090120150SE +/- 2.57, N = 3SE +/- 0.11, N = 3SE +/- 0.06, N = 3SE +/- 0.14, N = 3131.65114.98124.65124.301. (CC) gcc options: -O2 -pthread -lhmmer -lsquid -lm

Timed MrBayes Analysis

OpenBenchmarking.orgSeconds, Fewer Is BetterTimed MrBayes Analysis 3.1.2Primate Phylogeny AnalysisLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.350100150200250SE +/- 1.50, N = 3SE +/- 0.32, N = 3SE +/- 1.07, N = 3SE +/- 1.49, N = 3226.50200.22197.95201.62

GraphicsMagick

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: BlurLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.3714212835SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.33, N = 319323232-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp1. (CC) gcc options: -O2 -pthread -lbz2 -lz -lm -lpthread

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: SharpenLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.3612182430SE +/- 0.00, N = 3SE +/- 0.33, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 311232323-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp1. (CC) gcc options: -O2 -pthread -lbz2 -lz -lm -lpthread

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: ResizingLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.3918273645SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 322404040-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp1. (CC) gcc options: -O2 -pthread -lbz2 -lz -lm -lpthread

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: HWB Color SpaceLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.31122334455SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.33, N = 3SE +/- 0.33, N = 339474750-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp1. (CC) gcc options: -O2 -pthread -lbz2 -lz -lm -lpthread

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: Local Adaptive ThresholdingLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.3612182430SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 313232322-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp-std=gnu99 -fopenmp -lgomp1. (CC) gcc options: -O2 -pthread -lbz2 -lz -lm -lpthread

C-Ray

This is a test of C-Ray, a simple raytracer designed to test the floating-point CPU performance. This test is multi-threaded (16 threads per core), will shoot 8 rays per pixel for anti-aliasing, and will generate a 1600 x 1200 image. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgSeconds, Fewer Is BetterC-Ray 1.1Total TimeLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.3110220330440550SE +/- 0.92, N = 3SE +/- 0.82, N = 3SE +/- 3.69, N = 3SE +/- 2.09, N = 3508.53313.32313.27435.431. (CC) gcc options: -lm -lpthread -O3

Primesieve

OpenBenchmarking.orgSeconds, Fewer Is BetterPrimesieve 4.01e12 Prime Number GenerationLLVM Clang 3.0GCC 4.7.2GCC 4.8.0 SVNGCC 4.6.330060090012001500SE +/- 2.23, N = 3SE +/- 16.56, N = 3SE +/- 22.70, N = 6SE +/- 18.65, N = 61507.90866.18886.19883.94-fopenmp-fopenmp-fopenmp1. (CXX) g++ options: -O2

LLVM Clang 3.0

Processor: Exynos ARMv7 rev 4 @ 1.70GHz (2 Cores), Motherboard: SAMSUNG EXYNOS5 (Flattened Device Tree), Memory: 2048MB, Disk: 16GB SEM16G

OS: Ubuntu 12.04, Kernel: 3.4.0 (armv7l), Desktop: Unity 2D 5.16.0, Display Server: X Server 1.11.3, Compiler: Clang 3.0-6ubuntu3, File-System: ext4, Screen Resolution: 1366x768

Processor Notes: Scaling Governor: ondemand

Testing initiated at 30 November 2012 19:15 by user user.

GCC 4.7.2

Processor: Exynos ARMv7 rev 4 @ 1.70GHz (2 Cores), Motherboard: SAMSUNG EXYNOS5 (Flattened Device Tree), Memory: 2048MB, Disk: 16GB SEM16G

OS: Ubuntu 12.04, Kernel: 3.4.0 (armv7l), Desktop: Unity 2D 5.16.0, Display Server: X Server 1.11.3, Compiler: GCC 4.7, File-System: ext4, Screen Resolution: 1366x768

Compiler Notes: --build=arm-linux-gnueabihf --disable-libitm --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,go,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v
Processor Notes: Scaling Governor: ondemand

Testing initiated at 1 December 2012 01:20 by user user.

GCC 4.8.0 SVN

Processor: Exynos ARMv7 rev 4 @ 1.70GHz (2 Cores), Motherboard: SAMSUNG EXYNOS5 (Flattened Device Tree), Memory: 2048MB, Disk: 16GB SEM16G

OS: Ubuntu 12.04, Kernel: 3.4.0 (armv7l), Desktop: Unity 2D 5.16.0, Display Server: X Server 1.11.3, Compiler: GCC 4.8.0 20121008, File-System: ext4, Screen Resolution: 1366x768

Compiler Notes: --build=arm-linux-gnueabihf --disable-libitm --disable-nls --disable-sjlj-exceptions --disable-werror --enable-checking=yes --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,ada,c++,go,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-plugin --enable-shared --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v
Processor Notes: Scaling Governor: ondemand

Testing initiated at 1 December 2012 13:57 by user user.

GCC 4.6.3

Processor: Exynos ARMv7 rev 4 @ 1.70GHz (2 Cores), Motherboard: SAMSUNG EXYNOS5 (Flattened Device Tree), Memory: 2048MB, Disk: 16GB SEM16G

OS: Ubuntu 12.04, Kernel: 3.4.0 (armv7l), Desktop: Unity 2D 5.16.0, Display Server: X Server 1.11.3, Compiler: GCC 4.6, File-System: ext4, Screen Resolution: 1366x768

Compiler Notes: --build=arm-linux-gnueabihf --disable-sjlj-exceptions --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-languages=c,c++,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb -v
Processor Notes: Scaling Governor: ondemand

Testing initiated at 1 December 2012 16:52 by user user.