Intel CPU Broadwell Core i7 Ultrabook Scaling

ACPI CPUFreq vs. Intel P-State CPU frequency scaling drivers on Ubuntu 15.04. Tests by Michael Larabel for a future article on Phoronix.com.

HTML result view exported from: https://openbenchmarking.org/result/1501259-DE-INTELCPUB60&grw&sor.

Intel CPU Broadwell Core i7 Ultrabook ScalingProcessorMotherboardChipsetMemoryDiskGraphicsAudioNetworkOSKernelDesktopDisplay ServerDisplay DriverOpenGLCompilerFile-SystemScreen ResolutionP-State PowersaveP-State PerformanceCPUFreq PerformanceCPUFreq OndemandIntel Core i7-5600U @ 3.20GHz (4 Cores)LENOVO 20BSCTO1WWIntel Broadwell-U-OPI8192MB128GB SAMSUNG MZNTE128Intel Broadwell-U (950MHz)Intel Broadwell-U AudioIntel Connection + Intel Wireless 7265Ubuntu 15.043.18.0-9-generic (x86_64)Unity 7.3.1X Server 1.16.2.901 (1.16.3 RC 1)intel 2.99.9173.3 Mesa 10.3.2GCC 4.9.2ext41920x1080Intel Core i7-5600U @ 2.60GHz (4 Cores)OpenBenchmarking.orgCompiler Details- --build=x86_64-linux-gnu --disable-browser-plugin --disable-vtable-verify --disable-werror --enable-checking=release --enable-clocale=gnu --enable-gnu-unique-object --enable-gtk-cairo --enable-java-awt=gtk --enable-java-home --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-multiarch --enable-multilib --enable-nls --enable-objc-gc --enable-plugin --enable-shared --enable-threads=posix --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-abi=m64 --with-arch-32=i686 --with-arch-directory=amd64 --with-multilib-list=m32,m64,mx32 --with-tune=generic -v Processor Details- P-State Powersave: Scaling Governor: intel_pstate powersave- P-State Performance: Scaling Governor: intel_pstate powersave- CPUFreq Performance: Scaling Governor: acpi-cpufreq ondemand- CPUFreq Ondemand: Scaling Governor: acpi-cpufreq ondemandGraphics Details- SNA

Intel CPU Broadwell Core i7 Ultrabook Scalingencode-mp3: WAV To MP3openarena: 1920 x 1080xonotic: 1920 x 1080 - Lowxonotic: 1920 x 1080 - Ultrafftw: Stock - 2D FFT Size 32fftw: Stock - 2D FFT Size 2048build-linux-kernel: Time To Compilex264: H.264 Video Encodingffmpeg: H.264 HD To NTSC DVP-State PowersaveP-State PerformanceCPUFreq PerformanceCPUFreq Ondemand12.8937.27166.8655.706756.123895.68283.5673.5718.2812.8737.37165.4955.616780.003911.08281.8473.4218.2612.8737.17167.6655.966732.963911.96280.2173.1119.7712.8237.40166.6455.906739.223888.84282.7573.1919.84OpenBenchmarking.org

LAME MP3 Encoding

WAV To MP3

OpenBenchmarking.orgSeconds, Fewer Is BetterLAME MP3 Encoding 3.99.3WAV To MP3CPUFreq OndemandP-State PerformanceCPUFreq PerformanceP-State Powersave3691215SE +/- 0.02, N = 5SE +/- 0.02, N = 5SE +/- 0.05, N = 5SE +/- 0.04, N = 512.8212.8712.8712.891. (CC) gcc options: -O3 -fomit-frame-pointer -ffast-math -pipe -lm

OpenArena

Resolution: 1920 x 1080

OpenBenchmarking.orgFrames Per Second, More Is BetterOpenArena 0.8.8Resolution: 1920 x 1080CPUFreq OndemandP-State PerformanceP-State PowersaveCPUFreq Performance918273645SE +/- 0.06, N = 3SE +/- 0.12, N = 3SE +/- 0.09, N = 3SE +/- 0.09, N = 337.4037.3737.2737.17MIN: 4 / MAX: 63MIN: 4 / MAX: 59MIN: 4 / MAX: 59MIN: 4 / MAX: 74

Xonotic

Resolution: 1920 x 1080 - Effects Quality: Low

OpenBenchmarking.orgFrames Per Second, More Is BetterXonotic 0.8Resolution: 1920 x 1080 - Effects Quality: LowCPUFreq PerformanceP-State PowersaveCPUFreq OndemandP-State Performance4080120160200SE +/- 0.12, N = 3SE +/- 0.22, N = 3SE +/- 0.59, N = 3SE +/- 0.86, N = 3167.66166.86166.64165.49MIN: 94 / MAX: 269MIN: 92 / MAX: 268MIN: 93 / MAX: 269MIN: 109 / MAX: 266

Xonotic

Resolution: 1920 x 1080 - Effects Quality: Ultra

OpenBenchmarking.orgFrames Per Second, More Is BetterXonotic 0.8Resolution: 1920 x 1080 - Effects Quality: UltraCPUFreq PerformanceCPUFreq OndemandP-State PowersaveP-State Performance1326395265SE +/- 0.04, N = 3SE +/- 0.01, N = 3SE +/- 0.06, N = 3SE +/- 0.12, N = 355.9655.9055.7055.61MIN: 25 / MAX: 84MIN: 25 / MAX: 84MIN: 25 / MAX: 83MIN: 24 / MAX: 83

FFTW

Build: Stock - Size: 2D FFT Size 32

OpenBenchmarking.orgMflops, More Is BetterFFTW 3.3.4Build: Stock - Size: 2D FFT Size 32P-State PerformanceP-State PowersaveCPUFreq OndemandCPUFreq Performance15003000450060007500SE +/- 7.79, N = 5SE +/- 36.03, N = 5SE +/- 28.94, N = 5SE +/- 23.82, N = 56780.006756.126739.226732.961. (CC) gcc options: -std=gnu99 -O3 -fomit-frame-pointer -mtune=native -malign-double -fstrict-aliasing -fno-schedule-insns -ffast-math -lm

FFTW

Build: Stock - Size: 2D FFT Size 2048

OpenBenchmarking.orgMflops, More Is BetterFFTW 3.3.4Build: Stock - Size: 2D FFT Size 2048CPUFreq PerformanceP-State PerformanceP-State PowersaveCPUFreq Ondemand8001600240032004000SE +/- 9.01, N = 5SE +/- 8.09, N = 5SE +/- 17.79, N = 5SE +/- 7.38, N = 53911.963911.083895.683888.841. (CC) gcc options: -std=gnu99 -O3 -fomit-frame-pointer -mtune=native -malign-double -fstrict-aliasing -fno-schedule-insns -ffast-math -lm

Timed Linux Kernel Compilation

Time To Compile

OpenBenchmarking.orgSeconds, Fewer Is BetterTimed Linux Kernel Compilation 3.18-rc6Time To CompileCPUFreq PerformanceP-State PerformanceCPUFreq OndemandP-State Powersave60120180240300SE +/- 0.36, N = 3SE +/- 0.41, N = 3SE +/- 0.93, N = 3SE +/- 0.34, N = 3280.21281.84282.75283.56

x264

H.264 Video Encoding

OpenBenchmarking.orgFrames Per Second, More Is Betterx264 2014-08-30H.264 Video EncodingP-State PowersaveP-State PerformanceCPUFreq OndemandCPUFreq Performance1632486480SE +/- 0.07, N = 5SE +/- 0.22, N = 5SE +/- 0.18, N = 5SE +/- 0.20, N = 573.5773.4273.1973.111. (CC) gcc options: -ldl -m64 -lm -lpthread -O3 -ffast-math -std=gnu99 -fomit-frame-pointer -fno-tree-vectorize

FFmpeg

H.264 HD To NTSC DV

OpenBenchmarking.orgSeconds, Fewer Is BetterFFmpeg 2.1.1H.264 HD To NTSC DVP-State PerformanceP-State PowersaveCPUFreq PerformanceCPUFreq Ondemand510152025SE +/- 0.04, N = 3SE +/- 0.03, N = 3SE +/- 0.07, N = 3SE +/- 0.01, N = 318.2618.2819.7719.841. (CC) gcc options: -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lXv -lX11 -lXext -lasound -lSDL -lm -pthread -std=c99 -fomit-frame-pointer -O3 -fno-math-errno -fno-signed-zeros -fno-tree-vectorize -MMD -MF -MT

OpenArena

Resolution: 1920 x 1080 - Total Frame Time

OpenBenchmarking.orgMilliseconds, Fewer Is BetterOpenArena 0.8.8Resolution: 1920 x 1080 - Total Frame TimeP-State PerformanceCPUFreq OndemandCPUFreq PerformanceP-State Powersave1224364860Min: 4 / Avg: 26.55 / Max: 57Min: 4 / Avg: 26.63 / Max: 58Min: 4 / Avg: 26.72 / Max: 58Min: 4 / Avg: 26.87 / Max: 59

Phoronix Test Suite v10.8.5