LLVM 3.2 Clang Intel Linux Compiler

Intel Core i7-3960X Sandy Bridge Extreme Edition computer running Ubuntu 12.10 and comparing builds of LLVM/Clang 3.1 and LLVM/Clang 3.2 SVN. LLVM and Clang both times were built in release mode of --disable-assertions and --enable-optimized. Compiler flags passed to tests included -O3 and then each -march=nocona and -march=corei7-avx to see if there's any x86_64 compiler tuning optimizations when using corei7-avx for Intel Sandy Bridge CPUs. Benchmarking 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 1210095-RA-LLVM32CLA70
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nocona: LLVM-Clang 3.1
October 09 2012
 
corei7-avx: LLVM-Clang 3.1
October 09 2012
 
nocona: LLVM-Clang 3.2 SVN
October 08 2012
 
corei7-avx: LLVM-Clang 3.2 SVN
October 08 2012
 
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corei7-avx: LLVM-Clang 3.2 SVN

Processor Notes: Scaling Governor: ondemand
System Notes: Compiz was running on this system.

nocona: LLVM-Clang 3.2 SVN

Processor: Intel Core i7-3960X @ 3.30GHz (12 Cores), Motherboard: Intel DX79SI, Chipset: Intel Xeon E5/Core, Memory: 8192MB, Disk: 64GB OCZ VERTEX, Graphics: AMD Radeon HD 4650 512MB, Audio: Realtek ALC892, Monitor: DELL S2409W, Network: Intel 82579LM Gigabit Connection

OS: Ubuntu 12.10, Kernel: 3.6.0-030600-generic (x86_64), Desktop: Unity 6.8.0, Display Server: X Server 1.13.0, Display Driver: radeon 6.99.99, OpenGL: 3.0 Mesa 9.0-devel Gallium 0.4, Compiler: Clang 3.2 (SVN 165433) + LLVM 3.2svn, File-System: ext4, Screen Resolution: 1920x1080

nocona: LLVM-Clang 3.1

Compiler Notes: Optimized build; Built Oct 9 2012 (06:32:52); Default target: x86_64-unknown-linux-gnu; Host CPU: corei7-avx
Processor Notes: Scaling Governor: ondemand
System Notes: Compiz was running on this system.

corei7-avx: LLVM-Clang 3.1

OS: Ubuntu 12.10, Kernel: 3.6.0-030600-generic (x86_64), Desktop: Unity 6.8.0, Display Server: X Server 1.13.0, Display Driver: radeon 6.99.99, OpenGL: 3.0 Mesa 9.0-devel Gallium 0.4, Compiler: Clang 3.1 + LLVM 3.1, File-System: ext4, Screen Resolution: 1920x1080

LLVM 3.2 Clang Intel Linux CompilerOpenBenchmarking.orgPhoronix Test SuiteIntel Core i7-3960X @ 3.30GHz (12 Cores)Intel DX79SIIntel Xeon E5/Core8192MB64GB OCZ VERTEXAMD Radeon HD 4650 512MBRealtek ALC892DELL S2409WIntel 82579LM Gigabit ConnectionUbuntu 12.103.6.0-030600-generic (x86_64)Unity 6.8.0X Server 1.13.0radeon 6.99.993.0 Mesa 9.0-devel Gallium 0.4Clang 3.2 (SVN 165433) + LLVM 3.2svnClang 3.1 + LLVM 3.1ext41920x1080ProcessorMotherboardChipsetMemoryDiskGraphicsAudioMonitorNetworkOSKernelDesktopDisplay ServerDisplay DriverOpenGLCompilersFile-SystemScreen ResolutionLLVM 3.2 Clang Intel Linux Compiler BenchmarksSystem Logs- Scaling Governor: ondemand- Compiz was running on this system.- nocona: LLVM-Clang 3.1, corei7-avx: LLVM-Clang 3.1: Optimized build; Built Oct 9 2012 (06:32:52); Default target: x86_64-unknown-linux-gnu; Host CPU: corei7-avx

apache: Static Web Page Servingc-ray: Total Timeencode-flac: WAV To FLACgraphics-magick: Blurgraphics-magick: Sharpengraphics-magick: Resizinggraphics-magick: HWB Color Spacegraphics-magick: Local Adaptive Thresholdinghimeno: Poisson Pressure Solverpgbench: TPC-B Transactions Per Secondsmallpt: Global Illumination Renderer; 100 Sampleshmmer: Pfam Database Searchbuild-php: Time To Compilecorei7-avxnoconacorei7-avx LLVM-Clang 3.2 SVN LLVM-Clang 3.2 SVN LLVM-Clang 3.1 LLVM-Clang 3.116277.2520.996.36823189124451545.92377.9815215.3715.6916835.2421.626.407853107123481561.02370.4215715.4515.4716863.3226.346.418753104121451575.76366.3614715.4120.5716850.8726.306.418752104121491582.01360.5114615.4220.57OpenBenchmarking.org

Apache Benchmark

corei7-avxnoconaOpenBenchmarking.orgRequests Per Second, More Is BetterApache Benchmark 2.4.3Static Web Page ServingLLVM-Clang 3.1LLVM-Clang 3.2 SVN4K8K12K16K20KSE +/- 43.37, N = 3SE +/- 299.58, N = 3SE +/- 71.80, N = 3SE +/- 26.63, N = 316850.8716277.2516863.3216835.241. (CC) gcc options: -shared -fPIC -pthread -O3

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.

corei7-avxnoconaOpenBenchmarking.orgSeconds, Fewer Is BetterC-Ray 1.1Total TimeLLVM-Clang 3.1LLVM-Clang 3.2 SVN612182430SE +/- 0.02, N = 3SE +/- 0.01, N = 3SE +/- 0.01, N = 3SE +/- 0.04, N = 326.3020.9926.3421.621. (CC) gcc options: -lm -lpthread -O3

FLAC Audio Encoding

corei7-avxnoconaOpenBenchmarking.orgSeconds, Fewer Is BetterFLAC Audio Encoding 1.2.1WAV To FLACLLVM-Clang 3.1LLVM-Clang 3.2 SVN246810SE +/- 0.00, N = 5SE +/- 0.00, N = 5SE +/- 0.00, N = 5SE +/- 0.01, N = 56.416.366.416.401. (CXX) g++ options: -O3 -logg -lm

GraphicsMagick

corei7-avxnoconaOpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: BlurLLVM-Clang 3.1LLVM-Clang 3.2 SVN20406080100SE +/- 0.33, N = 3SE +/- 0.00, N = 3SE +/- 0.33, N = 3SE +/- 0.00, N = 3878287781. (CC) gcc options: -O3 -pthread -lXext -lSM -lICE -lX11 -lz -lm -lpthread

corei7-avxnoconaOpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: SharpenLLVM-Clang 3.1LLVM-Clang 3.2 SVN1224364860SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3523153531. (CC) gcc options: -O3 -pthread -lXext -lSM -lICE -lX11 -lz -lm -lpthread

corei7-avxnoconaOpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: ResizingLLVM-Clang 3.1LLVM-Clang 3.2 SVN20406080100SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3104891041071. (CC) gcc options: -O3 -pthread -lXext -lSM -lICE -lX11 -lz -lm -lpthread

corei7-avxnoconaOpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: HWB Color SpaceLLVM-Clang 3.1LLVM-Clang 3.2 SVN306090120150SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 31211241211231. (CC) gcc options: -O3 -pthread -lXext -lSM -lICE -lX11 -lz -lm -lpthread

corei7-avxnoconaOpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.16Operation: Local Adaptive ThresholdingLLVM-Clang 3.1LLVM-Clang 3.2 SVN1122334455SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3SE +/- 0.00, N = 3494545481. (CC) gcc options: -O3 -pthread -lXext -lSM -lICE -lX11 -lz -lm -lpthread

Himeno Benchmark

The Himeno benchmark is a linear solver of pressure Poisson using a point-Jacobi method. Learn more via the OpenBenchmarking.org test page.

corei7-avxnoconaOpenBenchmarking.orgMFLOPS, More Is BetterHimeno Benchmark 3.0Poisson Pressure SolverLLVM-Clang 3.1LLVM-Clang 3.2 SVN30060090012001500SE +/- 2.49, N = 3SE +/- 3.54, N = 3SE +/- 1.69, N = 3SE +/- 2.19, N = 31582.011545.921575.761561.021. (CC) gcc options: -O3

PostgreSQL pgbench

corei7-avxnoconaOpenBenchmarking.orgTPS, More Is BetterPostgreSQL pgbench 8.4.11TPC-B Transactions Per SecondLLVM-Clang 3.1LLVM-Clang 3.2 SVN80160240320400SE +/- 4.65, N = 3SE +/- 0.65, N = 3SE +/- 6.05, N = 3SE +/- 6.91, N = 3360.51377.98366.36370.421. (CC) gcc options: -O3 -fno-strict-aliasing -fwrapv -lpgport -lpq -lcrypt -ldl -lm

Smallpt

Smallpt is a C++ global illumination renderer written in less than 100 lines of code. Global illumination is done via unbiased Monte Carlo path tracing and there is multi-threading support via the OpenMP library. Learn more via the OpenBenchmarking.org test page.

corei7-avxnoconaOpenBenchmarking.orgSeconds, Fewer Is BetterSmallpt 1.0Global Illumination Renderer; 100 SamplesLLVM-Clang 3.1LLVM-Clang 3.2 SVN306090120150SE +/- 0.33, N = 3SE +/- 0.58, N = 3SE +/- 0.33, N = 3SE +/- 0.88, N = 31461521471571. (CXX) g++ options: -fopenmp -O3

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.

corei7-avxnoconaOpenBenchmarking.orgSeconds, Fewer Is BetterTimed HMMer Search 2.3.2Pfam Database SearchLLVM-Clang 3.1LLVM-Clang 3.2 SVN48121620SE +/- 0.03, N = 3SE +/- 0.04, N = 3SE +/- 0.02, N = 3SE +/- 0.02, N = 315.4215.3715.4115.451. (CC) gcc options: -O3 -pthread -lhmmer -lsquid -lm

Timed PHP Compilation

corei7-avxnoconaOpenBenchmarking.orgSeconds, Fewer Is BetterTimed PHP Compilation 5.2.9Time To CompileLLVM-Clang 3.1LLVM-Clang 3.2 SVN510152025SE +/- 0.06, N = 3SE +/- 0.22, N = 6SE +/- 0.06, N = 3SE +/- 0.04, N = 320.5715.6920.5715.471. (CC) gcc options: -O3 -pedantic -ldl -lpthread -lz -lm

corei7-avx: LLVM-Clang 3.2 SVN

Processor Notes: Scaling Governor: ondemand
System Notes: Compiz was running on this system.

Testing initiated at 8 October 2012 17:31 by user phoronix.

nocona: LLVM-Clang 3.2 SVN

Processor: Intel Core i7-3960X @ 3.30GHz (12 Cores), Motherboard: Intel DX79SI, Chipset: Intel Xeon E5/Core, Memory: 8192MB, Disk: 64GB OCZ VERTEX, Graphics: AMD Radeon HD 4650 512MB, Audio: Realtek ALC892, Monitor: DELL S2409W, Network: Intel 82579LM Gigabit Connection

OS: Ubuntu 12.10, Kernel: 3.6.0-030600-generic (x86_64), Desktop: Unity 6.8.0, Display Server: X Server 1.13.0, Display Driver: radeon 6.99.99, OpenGL: 3.0 Mesa 9.0-devel Gallium 0.4, Compiler: Clang 3.2 (SVN 165433) + LLVM 3.2svn, File-System: ext4, Screen Resolution: 1920x1080

Processor Notes: Scaling Governor: ondemand
System Notes: Compiz was running on this system.

Testing initiated at 8 October 2012 19:10 by user phoronix.

nocona: LLVM-Clang 3.1

Compiler Notes: Optimized build; Built Oct 9 2012 (06:32:52); Default target: x86_64-unknown-linux-gnu; Host CPU: corei7-avx
Processor Notes: Scaling Governor: ondemand
System Notes: Compiz was running on this system.

Testing initiated at 9 October 2012 06:49 by user phoronix.

corei7-avx: LLVM-Clang 3.1

Processor: Intel Core i7-3960X @ 3.30GHz (12 Cores), Motherboard: Intel DX79SI, Chipset: Intel Xeon E5/Core, Memory: 8192MB, Disk: 64GB OCZ VERTEX, Graphics: AMD Radeon HD 4650 512MB, Audio: Realtek ALC892, Monitor: DELL S2409W, Network: Intel 82579LM Gigabit Connection

OS: Ubuntu 12.10, Kernel: 3.6.0-030600-generic (x86_64), Desktop: Unity 6.8.0, Display Server: X Server 1.13.0, Display Driver: radeon 6.99.99, OpenGL: 3.0 Mesa 9.0-devel Gallium 0.4, Compiler: Clang 3.1 + LLVM 3.1, File-System: ext4, Screen Resolution: 1920x1080

Compiler Notes: Optimized build; Built Oct 9 2012 (06:32:52); Default target: x86_64-unknown-linux-gnu; Host CPU: corei7-avx
Processor Notes: Scaling Governor: ondemand
System Notes: Compiz was running on this system.

Testing initiated at 9 October 2012 08:26 by user phoronix.