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
 
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June 06 2012
 
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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

TSCP

OpenBenchmarking.orgNodes Per Second, More Is BetterTSCP 1.81AI Chess PerformanceGCC 4.7LLVM-Clang 3.016K32K48K64K80KSE +/- 31.40, N = 5SE +/- 27.65, N = 57424466660
OpenBenchmarking.orgNodes Per Second, More Is BetterTSCP 1.81AI Chess PerformanceGCC 4.7LLVM-Clang 3.013K26K39K52K65KMin: 74168 / Avg: 74244 / Max: 74318Min: 66615 / Avg: 66660.2 / Max: 66760

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
OpenBenchmarking.orgMIPS, More Is Better7-Zip Compression 9.20.1Compress Speed TestGCC 4.7LLVM-Clang 3.0170340510680850Min: 849 / Avg: 862.33 / Max: 874Min: 938 / Avg: 950 / Max: 9731. (CXX) g++ options: -pipe -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 TimeGCC 4.7LLVM-Clang 3.02004006008001000SE +/- 0.27, N = 3SE +/- 4.36, N = 3721.541126.291. (CC) gcc options: -lm -lpthread -O3 -march=armv7-a
OpenBenchmarking.orgSeconds, Fewer Is BetterC-Ray 1.1Total TimeGCC 4.7LLVM-Clang 3.02004006008001000Min: 721.07 / Avg: 721.54 / Max: 721.99Min: 1118.27 / Avg: 1126.29 / Max: 1133.291. (CC) gcc options: -lm -lpthread -O3 -march=armv7-a