Intel Linux Kernel Power Regression

Investigating a potential power issue between Linux 3.15 and 3.16 kernels... Benchmarks by Michael Larabel 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 1408284-KH-IVBLAPTOP21
Jump To Table - Results

View

Do Not Show Noisy Results
Do Not Show Results With Incomplete Data
Do Not Show Results With Little Change/Spread
List Notable Results

Statistics

Show Overall Harmonic Mean(s)
Show Overall Geometric Mean
Show Wins / Losses Counts (Pie Chart)
Normalize Results
Remove Outliers Before Calculating Averages

Graph Settings

Force Line Graphs Where Applicable
Convert To Scalar Where Applicable
Prefer Vertical Bar Graphs
No Box Plots
On Line Graphs With Missing Data, Connect The Line Gaps

Multi-Way Comparison

Condense Multi-Option Tests Into Single Result Graphs
Condense Test Profiles With Multiple Version Results Into Single Result Graphs

Table

Show Detailed System Result Table

Run Management

Highlight
Result
Hide
Result
Result
Identifier
View Logs
Performance Per
Dollar
Date
Run
  Test
  Duration
Linux 3.13
August 28 2014
 
Linux 3.14
August 28 2014
 
Linux 3.15
August 28 2014
 
Linux 3.16
August 28 2014
 
Linux 3.17 Git
August 28 2014
 
Invert Hiding All Results Option
 

Only show results where is faster than
Only show results matching title/arguments (delimit multiple options with a comma):
Do not show results matching title/arguments (delimit multiple options with a comma):

Linux 3.13

Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Realtek ALC269VB, Network: Intel Centrino Advanced-N 6235

OS: Ubuntu 14.04, Kernel: 3.13.0-031300-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Compiler Notes: --build=x86_64-linux-gnu --disable-browser-plugin --disable-libmudflap --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-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 Notes: Scaling Governor: intel_pstate performance
Graphics Notes: SNA
System Notes: This was running on battery power.

Linux 3.14

OS: Ubuntu 14.04, Kernel: 3.14.0-031400-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Linux 3.15

OS: Ubuntu 14.04, Kernel: 3.15.0-031500-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Linux 3.16

OS: Ubuntu 14.04, Kernel: 3.16.0-031600-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Linux 3.17 Git

OS: Ubuntu 14.04, Kernel: 3.17.0-999-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Intel Linux Kernel Power RegressionOpenBenchmarking.orgPhoronix Test SuiteIntel Core i7-3517U @ 3.00GHz (4 Cores)ASUS UX32VDA v1.0Intel 3rd Gen Core DRAM4096MB2 x 128GB SanDisk SD5SF212Intel HD 4000 512MB (1150MHz)Realtek ALC269VBIntel Centrino Advanced-N 6235Ubuntu 14.043.13.0-031300-generic (x86_64)3.14.0-031400-generic (x86_64)3.15.0-031500-generic (x86_64)3.16.0-031600-generic (x86_64)3.17.0-999-generic (x86_64)GNOME Shell 3.10.4X Server 1.15.1intel 2.99.9103.3 Mesa 10.1.3GCC 4.8.2ext41920x1080ProcessorMotherboardChipsetMemoryDiskGraphicsAudioNetworkOSKernelsDesktopDisplay ServerDisplay DriverOpenGLCompilerFile-SystemScreen ResolutionIntel Linux Kernel Power Regression BenchmarksSystem Logs- --build=x86_64-linux-gnu --disable-browser-plugin --disable-libmudflap --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-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 - Scaling Governor: intel_pstate performance- SNA- This was running on battery power.

Intel Linux Kernel Power Regressionxonotic: 1920 x 1080 - Highencode-mp3: WAV To MP3Linux 3.13Linux 3.14Linux 3.15Linux 3.16Linux 3.17 Git58.3828.3258.4523.8458.7028.2959.0117.1059.1417.06OpenBenchmarking.org

Xonotic

OpenBenchmarking.orgFrames Per Second, More Is BetterXonotic 0.7Resolution: 1920 x 1080 - Effects Quality: HighLinux 3.13Linux 3.14Linux 3.15Linux 3.16Linux 3.17 Git1326395265SE +/- 0.73, N = 3SE +/- 0.15, N = 3SE +/- 0.11, N = 3SE +/- 0.29, N = 3SE +/- 0.24, N = 358.3858.4558.7059.0159.14MIN: 31 / MAX: 78MIN: 32 / MAX: 77MIN: 32 / MAX: 77MIN: 33 / MAX: 78MIN: 33 / MAX: 78
OpenBenchmarking.orgFrames Per Second, More Is BetterXonotic 0.7Resolution: 1920 x 1080 - Effects Quality: HighLinux 3.13Linux 3.14Linux 3.15Linux 3.16Linux 3.17 Git1224364860Min: 56.96 / Avg: 58.38 / Max: 59.42Min: 58.19 / Avg: 58.45 / Max: 58.71Min: 58.52 / Avg: 58.7 / Max: 58.91Min: 58.46 / Avg: 59.01 / Max: 59.45Min: 58.69 / Avg: 59.14 / Max: 59.48

MinAvgMaxLinux 3.13156363507038546Linux 3.14154063417937399Linux 3.15151033303236667Linux 3.16152733416436674Linux 3.17 Git155543496537939OpenBenchmarking.orgMilliwatts, Fewer Is BetterXonotic 0.7System Power Consumption Monitor10K20K30K40K50K

LAME MP3 Encoding

LAME is an MP3 encoder licensed under the LGPL. This test measures the time required to encode a WAV file to MP3 format. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgSeconds, Fewer Is BetterLAME MP3 Encoding 3.99.3WAV To MP3Linux 3.13Linux 3.14Linux 3.15Linux 3.16Linux 3.17 Git714212835SE +/- 0.03, N = 5SE +/- 2.76, N = 5SE +/- 0.02, N = 5SE +/- 0.04, N = 5SE +/- 0.01, N = 528.3223.8428.2917.1017.061. (CC) gcc options: -O3 -fomit-frame-pointer -ffast-math -pipe -lm
OpenBenchmarking.orgSeconds, Fewer Is BetterLAME MP3 Encoding 3.99.3WAV To MP3Linux 3.13Linux 3.14Linux 3.15Linux 3.16Linux 3.17 Git612182430Min: 28.2 / Avg: 28.32 / Max: 28.41Min: 17.06 / Avg: 23.84 / Max: 28.39Min: 28.23 / Avg: 28.29 / Max: 28.34Min: 17.03 / Avg: 17.1 / Max: 17.24Min: 17.03 / Avg: 17.06 / Max: 17.081. (CC) gcc options: -O3 -fomit-frame-pointer -ffast-math -pipe -lm

MinAvgMaxLinux 3.13152291978321578Linux 3.14150442035025263Linux 3.15147181906520779Linux 3.16149852301127972Linux 3.17 Git153692327326122OpenBenchmarking.orgMilliwatts, Fewer Is BetterLAME MP3 Encoding 3.99.3System Power Consumption Monitor7K14K21K28K35K

Timed Idle

MinAvgMaxLinux 3.13146811512816768Linux 3.14144671487816339Linux 3.1560701448916605Linux 3.16144521480816257Linux 3.17 Git146001493015591OpenBenchmarking.orgMilliwatts, Fewer Is BetterTimed IdleSystem Power Consumption Monitor5K10K15K20K25K

System Power Consumption Monitor

MinAvgMaxLinux 3.13146812747638546Linux 3.14144672710637399Linux 3.1560702602236667Linux 3.16142592755036674Linux 3.17 Git146002811237939OpenBenchmarking.orgMilliwattsSystem Power Consumption MonitorPhoronix Test Suite System Monitoring10K20K30K40K50K

Linux 3.13

Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Realtek ALC269VB, Network: Intel Centrino Advanced-N 6235

OS: Ubuntu 14.04, Kernel: 3.13.0-031300-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Compiler Notes: --build=x86_64-linux-gnu --disable-browser-plugin --disable-libmudflap --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-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 Notes: Scaling Governor: intel_pstate performance
Graphics Notes: SNA
System Notes: This was running on battery power.

Testing initiated at 28 August 2014 15:14 by user phoronix.

Linux 3.14

Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Realtek ALC269VB, Network: Intel Centrino Advanced-N 6235

OS: Ubuntu 14.04, Kernel: 3.14.0-031400-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Compiler Notes: --build=x86_64-linux-gnu --disable-browser-plugin --disable-libmudflap --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-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 Notes: Scaling Governor: intel_pstate performance
Graphics Notes: SNA
System Notes: This was running on battery power.

Testing initiated at 28 August 2014 14:55 by user phoronix.

Linux 3.15

Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Realtek ALC269VB, Network: Intel Centrino Advanced-N 6235

OS: Ubuntu 14.04, Kernel: 3.15.0-031500-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Compiler Notes: --build=x86_64-linux-gnu --disable-browser-plugin --disable-libmudflap --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-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 Notes: Scaling Governor: intel_pstate performance
Graphics Notes: SNA
System Notes: This was running on battery power.

Testing initiated at 28 August 2014 14:35 by user phoronix.

Linux 3.16

Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Realtek ALC269VB, Network: Intel Centrino Advanced-N 6235

OS: Ubuntu 14.04, Kernel: 3.16.0-031600-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Compiler Notes: --build=x86_64-linux-gnu --disable-browser-plugin --disable-libmudflap --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-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 Notes: Scaling Governor: intel_pstate performance
Graphics Notes: SNA
System Notes: This was running on battery power.

Testing initiated at 28 August 2014 13:07 by user phoronix.

Linux 3.17 Git

Processor: Intel Core i7-3517U @ 3.00GHz (4 Cores), Motherboard: ASUS UX32VDA v1.0, Chipset: Intel 3rd Gen Core DRAM, Memory: 4096MB, Disk: 2 x 128GB SanDisk SD5SF212, Graphics: Intel HD 4000 512MB (1150MHz), Audio: Realtek ALC269VB, Network: Intel Centrino Advanced-N 6235

OS: Ubuntu 14.04, Kernel: 3.17.0-999-generic (x86_64), Desktop: GNOME Shell 3.10.4, Display Server: X Server 1.15.1, Display Driver: intel 2.99.910, OpenGL: 3.3 Mesa 10.1.3, Compiler: GCC 4.8.2, File-System: ext4, Screen Resolution: 1920x1080

Compiler Notes: --build=x86_64-linux-gnu --disable-browser-plugin --disable-libmudflap --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-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 Notes: Scaling Governor: intel_pstate performance
Graphics Notes: SNA
System Notes: This was running on battery power.

Testing initiated at 28 August 2014 13:25 by user phoronix.