LLVM-Clang On Ubuntu Linux ARM

Comparing GCC 4.7.0 and LLVM-Clang 3.0 from Ubuntu repository on Ubuntu 12.10 daily snapshot from 5 June 2012. Testing for a future article on Phoronix.com. The CFLAGS/CXXFLAGS passed to each compiler were -O3 and -march=armv7-a.

Compare your own system(s) to this result file with the Phoronix Test Suite by running the command: phoronix-test-suite benchmark 1206060-SU-LLVMCLANG78
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LLVM-Clang 3.0
June 06 2012
 
GCC 4.7
June 06 2012
 
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LLVM-Clang 3.0

Processor: ARMv7 rev 10 @ 1.20GHz (2 Cores), Motherboard: OMAP4 Panda board, Memory: 1024MB, Disk: 16GB SD16G, Graphics: Texas Instruments OMAP

OS: Ubuntu 12.10, Kernel: 3.4.0-201-omap4 (armv7l), Desktop: Unity 2D 5.12.0, Display Server: X Server 1.11.3, Display Driver: fbdev 0.4.2, Compiler: Clang 3.0-6ubuntu3, File-System: ext4, Screen Resolution: 1920x1080

Processor Notes: Scaling Governor: ondemand

GCC 4.7

OS: Ubuntu 12.10, Kernel: 3.4.0-201-omap4 (armv7l), Desktop: Unity 2D 5.12.0, Display Server: X Server 1.11.3, Display Driver: fbdev 0.4.2, Compiler: GCC 4.7, File-System: ext4, Screen Resolution: 1920x1080

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

LLVM-Clang On Ubuntu Linux ARMOpenBenchmarking.orgPhoronix Test SuiteARMv7 rev 10 @ 1.20GHz (2 Cores)OMAP4 Panda board1024MB16GB SD16GTexas Instruments OMAPUbuntu 12.103.4.0-201-omap4 (armv7l)Unity 2D 5.12.0X Server 1.11.3fbdev 0.4.2Clang 3.0-6ubuntu3GCC 4.7ext41920x1080ProcessorMotherboardMemoryDiskGraphicsOSKernelDesktopDisplay ServerDisplay DriverCompilersFile-SystemScreen ResolutionLLVM-Clang On Ubuntu Linux ARM BenchmarksSystem Logs- Scaling Governor: ondemand- GCC 4.7: --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

LLVM-Clang 3.0 vs. GCC 4.7 ComparisonPhoronix Test SuiteBaseline+14%+14%+28%+28%+42%+42%+56%+56%56.1%11.4%Total TimeA.C.PC.S.T10.2%C-RayTSCP7-Zip CompressionLLVM-Clang 3.0GCC 4.7

7-Zip Compression

OpenBenchmarking.orgMIPS, More Is Better7-Zip Compression 9.20.1Compress Speed TestGCC 4.7LLVM-Clang 3.02004006008001000SE +/- 7.26, N = 3SE +/- 11.50, N = 38629501. (CXX) g++ options: -pipe -lpthread

TSCP

OpenBenchmarking.orgNodes Per Second, More Is BetterTSCP 1.81AI Chess PerformanceLLVM-Clang 3.0GCC 4.716K32K48K64K80KSE +/- 27.65, N = 5SE +/- 31.40, N = 56666074244

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 4.72004006008001000SE +/- 4.36, N = 3SE +/- 0.27, N = 31126.29721.541. (CC) gcc options: -lm -lpthread -O3 -march=armv7-a

LLVM-Clang 3.0

Processor: ARMv7 rev 10 @ 1.20GHz (2 Cores), Motherboard: OMAP4 Panda board, Memory: 1024MB, Disk: 16GB SD16G, Graphics: Texas Instruments OMAP

OS: Ubuntu 12.10, Kernel: 3.4.0-201-omap4 (armv7l), Desktop: Unity 2D 5.12.0, Display Server: X Server 1.11.3, Display Driver: fbdev 0.4.2, Compiler: Clang 3.0-6ubuntu3, File-System: ext4, Screen Resolution: 1920x1080

Processor Notes: Scaling Governor: ondemand

Testing initiated at 6 June 2012 11:35 by user phoronix.

GCC 4.7

Processor: ARMv7 rev 10 @ 1.20GHz (2 Cores), Motherboard: OMAP4 Panda board, Memory: 1024MB, Disk: 16GB SD16G, Graphics: Texas Instruments OMAP

OS: Ubuntu 12.10, Kernel: 3.4.0-201-omap4 (armv7l), Desktop: Unity 2D 5.12.0, Display Server: X Server 1.11.3, Display Driver: fbdev 0.4.2, Compiler: GCC 4.7, File-System: ext4, Screen Resolution: 1920x1080

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 6 June 2012 14:54 by user phoronix.