GCC 7.2 vs. GCC 8 vs. LLVM Clang 5 vs. LLVM Clang 6 Znver1 EPYC

AMD EPYC 7601 32-Core testing with a TYAN B8026T70AE24HR, testing various compilers. Tests for a future article on Phoronix.

Compare your own system(s) to this result file with the Phoronix Test Suite by running the command: phoronix-test-suite benchmark 1711053-AL-GCC72VSGC51
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GCC 7.2.0
October 30 2017
 
GCC 8.0.0 20171030
October 30 2017
 
LLVM Clang 5.0
October 31 2017
 
LLVM Clang 6.0 svn316959
October 31 2017
 
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GCC 7.2.0

Processor: AMD EPYC 7601 32-Core @ 2.20GHz (32 Cores / 64 Threads), Motherboard: TYAN B8026T70AE24HR, Chipset: AMD Device 1450, Memory: 129024MB, Disk: 120GB Force MP500, Graphics: ASPEED ASPEED Family, Monitor: Acer P243W, Network: Broadcom Limited NetXtreme BCM5720 Gigabit PCIe

OS: Ubuntu 17.10, Kernel: 4.13.0-16-generic (x86_64), Desktop: GNOME Shell 3.26.1, Compiler: GCC 7.2.0, File-System: ext4, Screen Resolution: 1920x1200

Compiler Notes: --disable-multilib --enable-checking=release --enable-languages=c,c++
Processor Notes: Scaling Governor: acpi-cpufreq ondemand

GCC 8.0.0 20171030

OS: Ubuntu 17.10, Kernel: 4.13.0-16-generic (x86_64), Desktop: GNOME Shell 3.26.1, Compiler: GCC 8.0.0 20171030, File-System: ext4, Screen Resolution: 1920x1200

LLVM Clang 5.0

OS: Ubuntu 17.10, Kernel: 4.13.0-16-generic (x86_64), Desktop: GNOME Shell 3.26.1, Compiler: Clang 5.0.0-3, File-System: ext4, Screen Resolution: 1920x1200

Processor Notes: Scaling Governor: acpi-cpufreq ondemand

LLVM Clang 6.0 svn316959

OS: Ubuntu 17.10, Kernel: 4.13.0-16-generic (x86_64), Desktop: GNOME Shell 3.26.1, Compiler: Clang 6.0.0-svn316959-1~exp1, File-System: ext4, Screen Resolution: 1920x1200

GCC 7.2 vs. GCC 8 vs. LLVM Clang 5 vs. LLVM Clang 6 Znver1 EPYCOpenBenchmarking.orgPhoronix Test SuiteAMD EPYC 7601 32-Core @ 2.20GHz (32 Cores / 64 Threads)TYAN B8026T70AE24HRAMD Device 1450129024MB120GB Force MP500ASPEED ASPEED FamilyAcer P243WBroadcom Limited NetXtreme BCM5720 Gigabit PCIeUbuntu 17.104.13.0-16-generic (x86_64)GNOME Shell 3.26.1GCC 7.2.0GCC 8.0.0 20171030Clang 5.0.0-3Clang 6.0.0-svn316959-1~exp1ext41920x1200ProcessorMotherboardChipsetMemoryDiskGraphicsMonitorNetworkOSKernelDesktopCompilersFile-SystemScreen ResolutionGCC 7.2 Vs. GCC 8 Vs. LLVM Clang 5 Vs. LLVM Clang 6 Znver1 EPYC BenchmarksSystem Logs- GCC 7.2.0, GCC 8.0.0 20171030: --disable-multilib --enable-checking=release --enable-languages=c,c++- Scaling Governor: acpi-cpufreq ondemand

GCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959Logarithmic Result OverviewPhoronix Test SuiteTTSIOD 3D RendererRedisC-RayLAME MP3 EncodingGraphicsMagickSciMarkTSCPFFTWStockfishHimeno BenchmarkHigh Performance Conjugate GradientFFmpeglibjpeg-turbo tjbenchPrimesieveSmallpt

GCC 7.2 vs. GCC 8 vs. LLVM Clang 5 vs. LLVM Clang 6 Znver1 EPYCttsiod-renderer: Phong Rendering With Soft-Shadow Mappinghpcg: gmpbench: Total Timegraphics-magick: Blurgraphics-magick: Sharpengraphics-magick: Resizinggraphics-magick: HWB Color Spacegraphics-magick: Local Adaptive Thresholdingtjbench: Decompression Throughputfftw: Stock - 1D FFT Size 1024fftw: Stock - 2D FFT Size 1024fftw: Float + SSE - 1D FFT Size 1024fftw: Float + SSE - 2D FFT Size 1024scimark2: Compositescimark2: Monte Carloscimark2: Fast Fourier Transformscimark2: Sparse Matrix Multiplyscimark2: Dense LU Matrix Factorizationscimark2: Jacobi Successive Over-Relaxationhimeno: Poisson Pressure Solvertscp: AI Chess Performanceredis: LPOPredis: SADDredis: LPUSHredis: GETredis: SETpgbench: Buffer Test - Normal Load - Read Onlypgbench: Buffer Test - Single Thread - Read Onlystockfish: Total Timec-ray: Total Timeprimesieve: 1e12 Prime Number Generationsmallpt: Global Illumination Renderer; 100 Samplesencode-mp3: WAV To MP3ffmpeg: H.264 HD To NTSC DVGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959407.270.733918.80148177174198109141.558539.106420.2326763198341925.72194.45223.692376.615150.441683.40936.77861129202065.84189478.65193867.82198580.74192063.14308134.5710784.9244853.0811.91411.2010.69407.580.723926.20148179176199110143.798416.236622.9026876211311933.09554.99223.062444.394757.531685.48942.44853655195542.12193163.62192219.37198883.33193210.49303543.1710709.1345002.7411.94410.7110.6641.260.74115145161110142.267613.476090.3726224187621910.11560.13221.422402.424938.621427.97965.54895284191613.95194776.06203774.66197952.09199028.19167561.1910669.8143564.2611.82412.8110.4141.020.72116146162110144.467580.835852.2026395190361923.63551.21221.332534.374883.391427.86978.769332061823824.961489239.301247939.291584704.001260800.3744294.5511.80412.8910.45OpenBenchmarking.org

TTSIOD 3D Renderer

A portable GPL 3D software renderer that supports OpenMP and Intel Threading Building Blocks with many different rendering modes. This version does not use OpenGL but is entirely CPU/software based. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgFPS, More Is BetterTTSIOD 3D Renderer 2.3aPhong Rendering With Soft-Shadow MappingGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn31695990180270360450SE +/- 6.30, N = 6SE +/- 6.79, N = 4SE +/- 0.05, N = 3SE +/- 0.06, N = 3407.27407.5841.2641.021. (CXX) g++ options: -O3 -march=znver1 -fomit-frame-pointer -ffast-math -mtune=native -flto -msse -mrecip -mfpmath=sse -msse2 -mssse3 -lSDL -lstdc++

High Performance Conjugate Gradient

HPCG is the High Performance Conjugate Gradient and is a new scientific benchmark from Sandia National Lans focused for super-computer testing with modern real-world workloads compared to HPCC. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgGFLOP/s, More Is BetterHigh Performance Conjugate Gradient 3.0GCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169590.16650.3330.49950.6660.8325SE +/- 0.01, N = 3SE +/- 0.00, N = 3SE +/- 0.01, N = 3SE +/- 0.01, N = 30.730.720.740.72

GNU GMP GMPbench

GMPbench is a test of the GMP 6.1.2 math library. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgGMPbench Score, More Is BetterGNU GMP GMPbench 6.1.2Total TimeGCC 7.2.0GCC 8.0.0 2017103080016002400320040003918.803926.201. (CC) gcc options: -O3 -march=znver1 -lm

GraphicsMagick

This is a test of GraphicsMagick with its OpenMP implementation that performs various imaging tests to stress the system's CPU. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: BlurGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959306090120150SE +/- 0.67, N = 3SE +/- 1.00, N = 3148148115116-ldl-ldl-lgomp-lgomp1. (CC) gcc options: -fopenmp -O3 -march=znver1 -pthread -ljbig -lwebp -ltiff -ljpeg -lXext -lX11 -llzma -lz -lm -lpthread

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: SharpenGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169594080120160200SE +/- 0.33, N = 3SE +/- 0.67, N = 3177179145146-ldl-ldl-lgomp-lgomp1. (CC) gcc options: -fopenmp -O3 -march=znver1 -pthread -ljbig -lwebp -ltiff -ljpeg -lXext -lX11 -llzma -lz -lm -lpthread

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: ResizingGCC 7.2.0GCC 8.0.0 201710304080120160200SE +/- 0.67, N = 3SE +/- 0.88, N = 31741761. (CC) gcc options: -fopenmp -O3 -march=znver1 -pthread -ljbig -lwebp -ltiff -ljpeg -lXext -lX11 -llzma -lz -lm -ldl -lpthread

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: HWB Color SpaceGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169594080120160200198199161162-ldl-ldl-lgomp-lgomp1. (CC) gcc options: -fopenmp -O3 -march=znver1 -pthread -ljbig -lwebp -ltiff -ljpeg -lXext -lX11 -llzma -lz -lm -lpthread

OpenBenchmarking.orgIterations Per Minute, More Is BetterGraphicsMagick 1.3.19Operation: Local Adaptive ThresholdingGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn31695920406080100SE +/- 1.20, N = 3109110110110-ldl-ldl-lgomp-lgomp1. (CC) gcc options: -fopenmp -O3 -march=znver1 -pthread -ljbig -lwebp -ltiff -ljpeg -lXext -lX11 -llzma -lz -lm -lpthread

libjpeg-turbo tjbench

OpenBenchmarking.orgMegapixels/sec, More Is Betterlibjpeg-turbo tjbench 1.5.1Test: Decompression ThroughputGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959306090120150SE +/- 0.03, N = 3SE +/- 0.02, N = 3SE +/- 0.09, N = 3SE +/- 0.02, N = 3141.55143.79142.26144.461. (CC) gcc options: -O3 -march=znver1 -lm

FFTW

FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgMflops, More Is BetterFFTW 3.3.6Build: Stock - Size: 1D FFT Size 1024GCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169592K4K6K8K10KSE +/- 4.79, N = 3SE +/- 5.10, N = 3SE +/- 8.50, N = 3SE +/- 14.03, N = 38539.108416.237613.477580.831. (CC) gcc options: -pthread -O3 -march=znver1 -lm

OpenBenchmarking.orgMflops, More Is BetterFFTW 3.3.6Build: Stock - Size: 2D FFT Size 1024GCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn31695914002800420056007000SE +/- 104.31, N = 4SE +/- 33.11, N = 3SE +/- 10.25, N = 3SE +/- 96.36, N = 46420.236622.906090.375852.201. (CC) gcc options: -pthread -O3 -march=znver1 -lm

OpenBenchmarking.orgMflops, More Is BetterFFTW 3.3.6Build: Float + SSE - Size: 1D FFT Size 1024GCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169596K12K18K24K30KSE +/- 26.61, N = 3SE +/- 120.67, N = 3SE +/- 35.53, N = 3SE +/- 28.81, N = 3267632687626224263951. (CC) gcc options: -pthread -O3 -march=znver1 -lm

OpenBenchmarking.orgMflops, More Is BetterFFTW 3.3.6Build: Float + SSE - Size: 2D FFT Size 1024GCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169595K10K15K20K25KSE +/- 270.69, N = 3SE +/- 57.10, N = 3SE +/- 65.36, N = 3SE +/- 25.56, N = 3198342113118762190361. (CC) gcc options: -pthread -O3 -march=znver1 -lm

SciMark

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: CompositeGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959400800120016002000SE +/- 8.62, N = 4SE +/- 7.80, N = 4SE +/- 9.03, N = 4SE +/- 5.14, N = 41925.721933.091910.111923.631. (CC) gcc options: -O3 -march=znver1 -lm

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Monte CarloGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959120240360480600SE +/- 0.01, N = 4SE +/- 0.07, N = 4SE +/- 0.06, N = 4SE +/- 0.19, N = 4194.45554.99560.13551.211. (CC) gcc options: -O3 -march=znver1 -lm

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Fast Fourier TransformGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn31695950100150200250SE +/- 0.12, N = 4SE +/- 0.07, N = 4SE +/- 0.15, N = 4SE +/- 0.02, N = 4223.69223.06221.42221.331. (CC) gcc options: -O3 -march=znver1 -lm

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Sparse Matrix MultiplyGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169595001000150020002500SE +/- 13.62, N = 4SE +/- 9.19, N = 4SE +/- 11.52, N = 4SE +/- 13.69, N = 42376.612444.392402.422534.371. (CC) gcc options: -O3 -march=znver1 -lm

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Dense LU Matrix FactorizationGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn31695911002200330044005500SE +/- 37.84, N = 4SE +/- 31.33, N = 4SE +/- 38.03, N = 4SE +/- 14.77, N = 45150.444757.534938.624883.391. (CC) gcc options: -O3 -march=znver1 -lm

OpenBenchmarking.orgMflops, More Is BetterSciMark 2.0Computational Test: Jacobi Successive Over-RelaxationGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959400800120016002000SE +/- 0.70, N = 4SE +/- 0.66, N = 4SE +/- 0.12, N = 4SE +/- 0.24, N = 41683.401685.481427.971427.861. (CC) gcc options: -O3 -march=znver1 -lm

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.

OpenBenchmarking.orgMFLOPS, More Is BetterHimeno Benchmark 3.0Poisson Pressure SolverGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169592004006008001000SE +/- 21.77, N = 6SE +/- 1.81, N = 3SE +/- 2.40, N = 3SE +/- 3.60, N = 3936.77942.44965.54978.761. (CC) gcc options: -O3 -march=znver1 -mavx2

TSCP

This is a performance test of TSCP, Tom Kerrigan's Simple Chess Program, which has a built-in performance benchmark. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgNodes Per Second, More Is BetterTSCP 1.81AI Chess PerformanceGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959200K400K600K800K1000KSE +/- 329.95, N = 5SE +/- 264.40, N = 5SE +/- 544.63, N = 5SE +/- 316.00, N = 58611298536558952849332061. (CC) gcc options: -O3 -march=znver1 -march=native

Redis

OpenBenchmarking.orgRequests Per Second, More Is BetterRedis 3.0.1Test: LPOPGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959400K800K1200K1600K2000KSE +/- 3741.75, N = 3SE +/- 3274.37, N = 6SE +/- 1726.15, N = 3SE +/- 97746.43, N = 6202065.84195542.12191613.951823824.961. (CC) gcc options: -ggdb -rdynamic -lm -pthread

OpenBenchmarking.orgRequests Per Second, More Is BetterRedis 3.0.1Test: SADDGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959300K600K900K1200K1500KSE +/- 303.66, N = 3SE +/- 2485.81, N = 3SE +/- 2862.24, N = 3SE +/- 43532.25, N = 6189478.65193163.62194776.061489239.301. (CC) gcc options: -ggdb -rdynamic -lm -pthread

OpenBenchmarking.orgRequests Per Second, More Is BetterRedis 3.0.1Test: LPUSHGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959300K600K900K1200K1500KSE +/- 2952.51, N = 6SE +/- 3068.09, N = 4SE +/- 2321.76, N = 3SE +/- 20238.90, N = 6193867.82192219.37203774.661247939.291. (CC) gcc options: -ggdb -rdynamic -lm -pthread

OpenBenchmarking.orgRequests Per Second, More Is BetterRedis 3.0.1Test: GETGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959300K600K900K1200K1500KSE +/- 3940.07, N = 6SE +/- 2615.42, N = 6SE +/- 3998.05, N = 6SE +/- 24641.50, N = 3198580.74198883.33197952.091584704.001. (CC) gcc options: -ggdb -rdynamic -lm -pthread

OpenBenchmarking.orgRequests Per Second, More Is BetterRedis 3.0.1Test: SETGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn316959300K600K900K1200K1500KSE +/- 1582.98, N = 3SE +/- 3816.59, N = 3SE +/- 3063.36, N = 6SE +/- 13710.54, N = 3192063.14193210.49199028.191260800.371. (CC) gcc options: -ggdb -rdynamic -lm -pthread

PostgreSQL pgbench

This is a simple benchmark of PostgreSQL using pgbench. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgTPS, More Is BetterPostgreSQL pgbench 10.0Scaling: Buffer Test - Test: Normal Load - Mode: Read OnlyGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.070K140K210K280K350KSE +/- 1439.36, N = 3SE +/- 3027.80, N = 3SE +/- 15544.05, N = 6308134.57303543.17167561.19-shared-shared-lpgcommon -lpgport -lpthread -lrt -lcrypt -ldl -lm1. (CC) gcc options: -fno-strict-aliasing -fwrapv -O3 -march=znver1 -fPIC

OpenBenchmarking.orgTPS, More Is BetterPostgreSQL pgbench 10.0Scaling: Buffer Test - Test: Single Thread - Mode: Read OnlyGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.02K4K6K8K10KSE +/- 140.64, N = 3SE +/- 47.06, N = 3SE +/- 58.33, N = 310784.9210709.1310669.81-shared-shared-lpgcommon -lpgport -lpthread -lrt -lcrypt -ldl -lm1. (CC) gcc options: -fno-strict-aliasing -fwrapv -O3 -march=znver1 -fPIC

Stockfish

OpenBenchmarking.orgms, Fewer Is BetterStockfish 2014-11-26Total TimeGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn31695910002000300040005000SE +/- 56.11, N = 3SE +/- 55.17, N = 3SE +/- 4.04, N = 3SE +/- 44.52, N = 34485450043564429-flto-flto1. (CXX) g++ options: -lpthread -O3 -march=znver1 -fno-exceptions -fno-rtti -ansi -pedantic -msse -msse3 -mpopcnt

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 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169591.02382.04763.07144.09525.119SE +/- 0.06, N = 3SE +/- 0.07, N = 6SE +/- 0.04, N = 3SE +/- 0.02, N = 33.082.744.264.551. (CC) gcc options: -lm -lpthread -O3 -march=znver1

Primesieve

Primesieve generates prime numbers using a highly optimized sieve of Eratosthenes implementation. Primesieve benchmarks the CPU's L1/L2 cache performance. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgSeconds, Fewer Is BetterPrimesieve 6.21e12 Prime Number GenerationGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169593691215SE +/- 0.03, N = 3SE +/- 0.04, N = 3SE +/- 0.02, N = 3SE +/- 0.04, N = 311.9111.9411.8211.801. (CXX) g++ options: -O3 -march=znver1 -rdynamic -lpthread

Smallpt

OpenBenchmarking.orgSeconds, Fewer Is BetterSmallpt 1.0Global Illumination Renderer; 100 SamplesGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169590.91.82.73.64.5SE +/- 0.17, N = 6SE +/- 0.17, N = 644441. (CXX) g++ options: -fopenmp -O3 -march=znver1

LAME MP3 Encoding

OpenBenchmarking.orgSeconds, Fewer Is BetterLAME MP3 Encoding 3.99.5WAV To MP3GCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169593691215SE +/- 0.01, N = 5SE +/- 0.00, N = 5SE +/- 0.00, N = 5SE +/- 0.01, N = 511.2010.7112.8112.891. (CC) gcc options: -O3 -ffast-math -funroll-loops -fschedule-insns2 -fbranch-count-reg -fforce-addr -pipe -march=znver1 -lm

FFmpeg

OpenBenchmarking.orgSeconds, Fewer Is BetterFFmpeg 3.3.3H.264 HD To NTSC DVGCC 7.2.0GCC 8.0.0 20171030LLVM Clang 5.0LLVM Clang 6.0 svn3169593691215SE +/- 0.04, N = 3SE +/- 0.07, N = 3SE +/- 0.11, N = 3SE +/- 0.04, N = 310.6910.6610.4110.45-fno-tree-vectorize-fno-tree-vectorize-Qunused-arguments -mstack-alignment=16-Qunused-arguments -mstack-alignment=161. (CC) gcc options: -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lxcb -lxcb-xfixes -lxcb-shape -lasound -lm -llzma -pthread -O3 -march=znver1 -std=c11 -fomit-frame-pointer -fno-math-errno -fno-signed-zeros -MMD -MF -MT

GCC 7.2.0

Processor: AMD EPYC 7601 32-Core @ 2.20GHz (32 Cores / 64 Threads), Motherboard: TYAN B8026T70AE24HR, Chipset: AMD Device 1450, Memory: 129024MB, Disk: 120GB Force MP500, Graphics: ASPEED ASPEED Family, Monitor: Acer P243W, Network: Broadcom Limited NetXtreme BCM5720 Gigabit PCIe

OS: Ubuntu 17.10, Kernel: 4.13.0-16-generic (x86_64), Desktop: GNOME Shell 3.26.1, Compiler: GCC 7.2.0, File-System: ext4, Screen Resolution: 1920x1200

Compiler Notes: --disable-multilib --enable-checking=release --enable-languages=c,c++
Processor Notes: Scaling Governor: acpi-cpufreq ondemand

Testing initiated at 30 October 2017 17:18 by user phoronix.

GCC 8.0.0 20171030

Processor: AMD EPYC 7601 32-Core @ 2.20GHz (32 Cores / 64 Threads), Motherboard: TYAN B8026T70AE24HR, Chipset: AMD Device 1450, Memory: 129024MB, Disk: 120GB Force MP500, Graphics: ASPEED ASPEED Family, Monitor: Acer P243W, Network: Broadcom Limited NetXtreme BCM5720 Gigabit PCIe

OS: Ubuntu 17.10, Kernel: 4.13.0-16-generic (x86_64), Desktop: GNOME Shell 3.26.1, Compiler: GCC 8.0.0 20171030, File-System: ext4, Screen Resolution: 1920x1200

Compiler Notes: --disable-multilib --enable-checking=release --enable-languages=c,c++
Processor Notes: Scaling Governor: acpi-cpufreq ondemand

Testing initiated at 30 October 2017 20:12 by user phoronix.

LLVM Clang 5.0

Processor: AMD EPYC 7601 32-Core @ 2.20GHz (32 Cores / 64 Threads), Motherboard: TYAN B8026T70AE24HR, Chipset: AMD Device 1450, Memory: 129024MB, Disk: 120GB Force MP500, Graphics: ASPEED ASPEED Family, Monitor: Acer P243W, Network: Broadcom Limited NetXtreme BCM5720 Gigabit PCIe

OS: Ubuntu 17.10, Kernel: 4.13.0-16-generic (x86_64), Desktop: GNOME Shell 3.26.1, Compiler: Clang 5.0.0-3, File-System: ext4, Screen Resolution: 1920x1200

Processor Notes: Scaling Governor: acpi-cpufreq ondemand

Testing initiated at 31 October 2017 10:28 by user phoronix.

LLVM Clang 6.0 svn316959

Processor: AMD EPYC 7601 32-Core @ 2.20GHz (32 Cores / 64 Threads), Motherboard: TYAN B8026T70AE24HR, Chipset: AMD Device 1450, Memory: 129024MB, Disk: 120GB Force MP500, Graphics: ASPEED ASPEED Family, Monitor: Acer P243W, Network: Broadcom Limited NetXtreme BCM5720 Gigabit PCIe

OS: Ubuntu 17.10, Kernel: 4.13.0-16-generic (x86_64), Desktop: GNOME Shell 3.26.1, Compiler: Clang 6.0.0-svn316959-1~exp1, File-System: ext4, Screen Resolution: 1920x1200

Processor Notes: Scaling Governor: acpi-cpufreq ondemand

Testing initiated at 31 October 2017 15:41 by user phoronix.