Filesystem SATA NCQ

Benchmarking disk write cache on a SATA2 NCQ capable configuration. I added a few generic CPU tests as a reference for the system performance. The tests are going to try different file systems with or without write barrier and w/ or w/out disk write cache. The default CFQ scheduler is being used.

Compare your own system(s) to this result file with the Phoronix Test Suite by running the command: phoronix-test-suite benchmark 1105175-GR-FILESYSTE14
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C/C++ Compiler Tests 5 Tests
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CPU Massive 7 Tests
Cryptography 4 Tests
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Common Kernel Benchmarks 4 Tests
Multi-Core 4 Tests
Server 4 Tests
Server CPU Tests 3 Tests
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ext3-barrier-cache
May 10 2011
 
ext3-nobarrier-nocache
May 11 2011
 
ext4-barrier-cache
May 13 2011
 
ext4-nobarrier-nocache
May 16 2011
 
btrfs-cow-barrier-cache
May 16 2011
 
btrfs-nocow-nobarrier-nocache
May 17 2011
 
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ext3-barrier-cache

System Notes: Disk Scheduler: CFQ. Python 2.6. Intel SpeedStep was enabled.

ext3-nobarrier-nocache

Processor: Intel Core i5 650 @ 3.19GHz (4 Cores), Motherboard: LENOVO 5852CB6, Chipset: Intel Core, Memory: 7680MB, Disk: 320GB Western Digital WDC WD3200AAKX-0, Graphics: Intel Core IGP 256MB

OS: SUSE LINUX 11, Kernel: 2.6.32.12-0.7-default (x86_64), Desktop: GNOME 2.28.2, Display Server: X Server 1.6.5, Display Driver: intel 2.10.0, OpenGL: 1.4 (2.1 Mesa 7.7), Compiler: GCC 4.3, File-System: ext3, Screen Resolution: 1680x1050

ext4-barrier-cache

ext4-nobarrier-nocache

OS: SUSE LINUX 11, Kernel: 2.6.32.12-0.7-default (x86_64), Desktop: GNOME 2.28.2, Display Server: X Server 1.6.5, Display Driver: intel 2.10.0, OpenGL: 1.4 (2.1 Mesa 7.7), Compiler: GCC 4.3, File-System: ext2/ext3, Screen Resolution: 1680x1050

btrfs-cow-barrier-cache

btrfs-nocow-nobarrier-nocache

OS: SUSE LINUX 11, Kernel: 2.6.32.12-0.7-default (x86_64), Desktop: GNOME 2.28.2, Display Server: X Server 1.6.5, Display Driver: intel 2.10.0, OpenGL: 1.4 (2.1 Mesa 7.7), Compiler: GCC 4.3, File-System: Btrfs, Screen Resolution: 1680x1050

Filesystem SATA NCQOpenBenchmarking.orgPhoronix Test SuiteIntel Core i5 650 @ 3.19GHz (4 Cores)LENOVO 5852CB6Intel Core7680MB320GB Western Digital WDC WD3200AAKX-0Intel Core IGP 256MBSUSE LINUX 112.6.32.12-0.7-default (x86_64)GNOME 2.28.2X Server 1.6.5intel 2.10.01.4 (2.1 Mesa 7.7)GCC 4.3ext3ext2/ext3Btrfs1680x1050ProcessorMotherboardChipsetMemoryDiskGraphicsOSKernelDesktopDisplay ServerDisplay DriverOpenGLCompilerFile-SystemsScreen ResolutionFilesystem SATA NCQ BenchmarksSystem Logs- Disk Scheduler: CFQ. Python 2.6. Intel SpeedStep was enabled.

ext3-barrier-cacheext3-nobarrier-nocacheext4-barrier-cacheext4-nobarrier-nocachebtrfs-cow-barrier-cachebtrfs-nocow-nobarrier-nocacheLogarithmic Result OverviewPhoronix Test SuiteThreaded I/O TesterPostgreSQL pgbenchDbenchPostMarkCompile BenchSQLiteFlexible IO TesterIOzoneFS-MarkParallel BZIP2 CompressionUnpacking The Linux KernelApache BenchmarkGzip CompressionGnuPG7-Zip CompressionLZMA CompressionJohn The RipperOpenSSLGcrypt Library

Filesystem SATA NCQunpack-linux: linux-2.6.32.tar.bz2aio-stress: Rand Writepostmark: Disk Transaction Performancetiobench: 64MB Rand Write - 32 Threadstiobench: 64MB Rand Read - 32 Threadsfio: Intel IOMeter File Server Access Patternfs-mark: 1000 Files, 1MB Sizedbench: 128 Clientsdbench: 48 Clientsdbench: 12 Clientsdbench: 1 Clientsiozone: 8GB Read Performanceiozone: 8GB Write Performancecompilebench: Initial Createpgbench: TPC-B Transactions Per Secondapache: Static Web Page Servingsqlite: 12,500 INSERTscompress-lzma: 256MB File Compressioncompress-pbzip2: 256MB File Compressioncompress-gzip: 2GB File Compressioncompress-7zip: Compress Speed Testjohn-the-ripper: Blowfishjohn-the-ripper: MD5john-the-ripper: Traditional DESgcrypt: CAMELLIA256-ECB Cipheropenssl: RSA 4096-bit Performancegnupg: 1GB File Encryptionext3-barrier-cacheext3-nobarrier-nocacheext4-barrier-cacheext4-nobarrier-nocachebtrfs-cow-barrier-cachebtrfs-nocow-nobarrier-nocache11.151158.3718952.366489.8687.4214.0513.7321.0419.9611.5460.7874.76138.17115.9512281.33880.33201.6120.9914.368041897152733246000344353.3815.8411.151113.4619361.456460.1787.9913.0780.7079.3138.1110.3260.8571.39134.35113.0212148.53864.26201.2420.9514.628076899151893248667344753.4315.9310.712031.7341663.406360.6252.7414.9570.1472.3250.8011.2366.27113.82200.49169.6812471.13854.89200.9920.8314.318076897152553243000344753.3515.9110.892024.5041661.736531.7361.2218.70162.69165.9577.1010.8366.09111.21188.43164.9212136.65840.08201.3021.4414.528085899152833251333343753.3815.9010.67309051.706464.8755.9814.62132.76107.1448.149.9179.86121.95117.6033.7811944.801204.92201.8321.7414.338045898152783249667344053.4015.9710.7630551.706481.5151.9816.7346.5450.4629.379.6985.53124.9495.5529.4812309.251485.46201.4720.7014.538032898152323250667343353.4015.87OpenBenchmarking.org

Unpacking The Linux Kernel

OpenBenchmarking.orgSeconds, Fewer Is BetterUnpacking The Linux Kernellinux-2.6.32.tar.bz2ext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache3691215SE +/- 0.14, N = 4SE +/- 0.09, N = 4SE +/- 0.19, N = 4SE +/- 0.42, N = 8SE +/- 0.10, N = 4SE +/- 0.13, N = 810.8910.7111.1511.1510.7610.67

AIO-Stress

OpenBenchmarking.orgMB/s, More Is BetterAIO-Stress 0.21Random Writeext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cache400800120016002000SE +/- 11.53, N = 3SE +/- 20.87, N = 3SE +/- 21.98, N = 3SE +/- 24.13, N = 62024.502031.731113.461158.37

PostMark

OpenBenchmarking.orgTPS, More Is BetterPostMark 1.51Disk Transaction Performanceext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache9001800270036004500SE +/- 0.00, N = 5SE +/- 0.00, N = 5SE +/- 141.32, N = 10SE +/- 27.60, N = 5SE +/- 46.40, N = 10SE +/- 34.80, N = 10416641661936189530553090

Threaded I/O Tester

OpenBenchmarking.orgMB/s, More Is BetterThreaded I/O Tester 0.3.364MB Random Write - 32 Threadsext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache1224364860SE +/- 0.01, N = 4SE +/- 0.01, N = 4SE +/- 0.03, N = 8SE +/- 0.01, N = 4SE +/- 0.01, N = 4SE +/- 1.14, N = 81.733.401.452.361.7051.70

OpenBenchmarking.orgMB/s, More Is BetterThreaded I/O Tester 0.3.364MB Random Read - 32 Threadsext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache14002800420056007000SE +/- 10.55, N = 4SE +/- 90.95, N = 4SE +/- 75.75, N = 4SE +/- 66.48, N = 4SE +/- 9.30, N = 4SE +/- 29.65, N = 46531.736360.626460.176489.866481.516464.87

Flexible IO Tester

OpenBenchmarking.orgSeconds (Run Time), Fewer Is BetterFlexible IO Tester 1.21Intel IOMeter File Server Access Patternext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache20406080100SE +/- 0.07, N = 3SE +/- 0.95, N = 3SE +/- 1.35, N = 3SE +/- 1.82, N = 6SE +/- 0.72, N = 6SE +/- 0.50, N = 361.2252.7487.9987.4251.9855.98

FS-Mark

OpenBenchmarking.orgFiles/s, More Is BetterFS-Mark 3.31000 Files, 1MB Sizeext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache510152025SE +/- 0.17, N = 3SE +/- 0.21, N = 6SE +/- 0.44, N = 6SE +/- 0.57, N = 6SE +/- 0.03, N = 3SE +/- 0.21, N = 518.7014.9513.0714.0516.7314.62

Dbench

Dbench is a benchmark designed by the Samba project as a free alternative to netbench, but dbench contains only file-system calls for testing the disk performance. Learn more via the OpenBenchmarking.org test page.

OpenBenchmarking.orgMB/s, More Is BetterDbench 4.0128 Clientsext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache4080120160200SE +/- 1.83, N = 3SE +/- 1.05, N = 3SE +/- 3.75, N = 3SE +/- 0.67, N = 6SE +/- 0.54, N = 3SE +/- 4.84, N = 6162.6970.1480.7013.7346.54132.76

OpenBenchmarking.orgMB/s, More Is BetterDbench 4.048 Clientsext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache4080120160200SE +/- 1.96, N = 3SE +/- 0.51, N = 3SE +/- 0.77, N = 3SE +/- 0.14, N = 3SE +/- 0.74, N = 3SE +/- 0.18, N = 3165.9572.3279.3121.0450.46107.14

OpenBenchmarking.orgMB/s, More Is BetterDbench 4.012 Clientsext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache20406080100SE +/- 0.67, N = 3SE +/- 0.28, N = 3SE +/- 3.42, N = 6SE +/- 0.08, N = 3SE +/- 0.31, N = 3SE +/- 1.21, N = 677.1050.8038.1119.9629.3748.14

OpenBenchmarking.orgMB/s, More Is BetterDbench 4.01 Clientsext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache3691215SE +/- 0.03, N = 3SE +/- 0.02, N = 3SE +/- 0.01, N = 3SE +/- 0.01, N = 3SE +/- 0.16, N = 6SE +/- 0.03, N = 310.8311.2310.3211.549.699.91

IOzone

OpenBenchmarking.orgMB/s, More Is BetterIOzone 3.3478GB Read Performanceext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache20406080100SE +/- 3.79, N = 6SE +/- 3.63, N = 6SE +/- 0.01, N = 3SE +/- 0.26, N = 3SE +/- 0.16, N = 3SE +/- 0.15, N = 366.0966.2760.8560.7885.5379.86

OpenBenchmarking.orgMB/s, More Is BetterIOzone 3.3478GB Write Performanceext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache306090120150SE +/- 2.45, N = 6SE +/- 2.80, N = 6SE +/- 0.94, N = 3SE +/- 0.45, N = 3SE +/- 0.24, N = 3SE +/- 2.42, N = 3111.21113.8271.3974.76124.94121.95

Compile Bench

OpenBenchmarking.orgMB/s, More Is BetterCompile Bench 0.6Test: Initial Createext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache4080120160200SE +/- 4.64, N = 6SE +/- 5.58, N = 6SE +/- 3.85, N = 6SE +/- 11.37, N = 6SE +/- 1.85, N = 6SE +/- 3.04, N = 6188.43200.49134.35138.1795.55117.60

PostgreSQL pgbench

OpenBenchmarking.orgTPS, More Is BetterPostgreSQL pgbench 9.0.4TPC-B Transactions Per Secondext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache4080120160200SE +/- 1.18, N = 3SE +/- 0.43, N = 3SE +/- 2.73, N = 6SE +/- 0.51, N = 3SE +/- 0.16, N = 3SE +/- 0.39, N = 3164.92169.68113.02115.9529.4833.78

Apache Benchmark

OpenBenchmarking.orgRequests Per Second, More Is BetterApache Benchmark 2.2.17Static Web Page Servingext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache3K6K9K12K15KSE +/- 176.78, N = 6SE +/- 118.49, N = 3SE +/- 241.02, N = 3SE +/- 169.63, N = 5SE +/- 173.40, N = 3SE +/- 57.40, N = 312136.6512471.1312148.5312281.3312309.2511944.80

SQLite

OpenBenchmarking.orgSeconds, Fewer Is BetterSQLite 3.7.312,500 INSERTsext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache30060090012001500SE +/- 4.84, N = 3SE +/- 2.53, N = 3SE +/- 11.99, N = 5SE +/- 13.25, N = 3SE +/- 18.75, N = 3SE +/- 15.76, N = 3840.08854.89864.26880.331485.461204.92

LZMA Compression

OpenBenchmarking.orgSeconds, Fewer Is BetterLZMA Compression256MB File Compressionext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache4080120160200SE +/- 0.23, N = 3SE +/- 0.40, N = 3SE +/- 0.04, N = 3SE +/- 0.34, N = 3SE +/- 0.21, N = 3SE +/- 0.66, N = 3201.30200.99201.24201.61201.47201.83

Parallel BZIP2 Compression

OpenBenchmarking.orgSeconds, Fewer Is BetterParallel BZIP2 Compression 1.0.5256MB File Compressionext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache510152025SE +/- 0.22, N = 3SE +/- 0.10, N = 3SE +/- 0.35, N = 4SE +/- 0.29, N = 5SE +/- 0.40, N = 6SE +/- 0.10, N = 321.4420.8320.9520.9920.7021.74

Gzip Compression

OpenBenchmarking.orgSeconds, Fewer Is BetterGzip Compression2GB File Compressionext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache48121620SE +/- 0.26, N = 3SE +/- 0.04, N = 3SE +/- 0.20, N = 3SE +/- 0.06, N = 3SE +/- 0.24, N = 3SE +/- 0.04, N = 314.5214.3114.6214.3614.5314.33

7-Zip Compression

OpenBenchmarking.orgMIPS, More Is Better7-Zip Compression 9.13Compress Speed Testext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache2K4K6K8K10KSE +/- 9.82, N = 3SE +/- 17.04, N = 3SE +/- 5.84, N = 3SE +/- 3.48, N = 3SE +/- 8.69, N = 3SE +/- 13.32, N = 3808580768076804180328045

John The Ripper

OpenBenchmarking.orgReal C/S, More Is BetterJohn The Ripper 1.7.3.1Test: Blowfishext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache2004006008001000SE +/- 0.33, N = 3SE +/- 0.67, N = 3SE +/- 0.33, N = 3SE +/- 1.20, N = 3SE +/- 1.00, N = 3SE +/- 0.33, N = 3899897899897898898

OpenBenchmarking.orgReal C/S, More Is BetterJohn The Ripper 1.7.3.1Test: MD5ext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache3K6K9K12K15KSE +/- 6.08, N = 3SE +/- 6.89, N = 3SE +/- 41.80, N = 3SE +/- 10.48, N = 3SE +/- 60.84, N = 3SE +/- 8.69, N = 3152831525515189152731523215278

OpenBenchmarking.orgReal C/S, More Is BetterJohn The Ripper 1.7.3.1Test: Traditional DESext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache700K1400K2100K2800K3500KSE +/- 881.92, N = 3SE +/- 1154.70, N = 3SE +/- 1763.83, N = 3SE +/- 8185.35, N = 3SE +/- 1452.97, N = 3SE +/- 2333.33, N = 3325133332430003248667324600032506673249667

Gcrypt Library

OpenBenchmarking.orgMicroseconds, Fewer Is BetterGcrypt Library 1.4.4CAMELLIA256-ECB Cipherext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache7001400210028003500SE +/- 3.33, N = 3SE +/- 6.67, N = 3SE +/- 3.33, N = 3SE +/- 3.33, N = 3SE +/- 3.33, N = 3SE +/- 0.00, N = 3343734473447344334333440

OpenSSL

OpenBenchmarking.orgSigns Per Second, More Is BetterOpenSSL 1.0.0aRSA 4096-bit Performanceext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache1224364860SE +/- 0.03, N = 4SE +/- 0.03, N = 4SE +/- 0.05, N = 4SE +/- 0.06, N = 4SE +/- 0.00, N = 4SE +/- 0.07, N = 453.3853.3553.4353.3853.4053.40

GnuPG

OpenBenchmarking.orgSeconds, Fewer Is BetterGnuPG 1.4.101GB File Encryptionext4-nobarrier-nocacheext4-barrier-cacheext3-nobarrier-nocacheext3-barrier-cachebtrfs-nocow-nobarrier-nocachebtrfs-cow-barrier-cache48121620SE +/- 0.06, N = 4SE +/- 0.04, N = 4SE +/- 0.09, N = 4SE +/- 0.01, N = 4SE +/- 0.02, N = 4SE +/- 0.08, N = 415.9015.9115.9315.8415.8715.97

ext3-barrier-cache

System Notes: Disk Scheduler: CFQ. Python 2.6. Intel SpeedStep was enabled.

Testing initiated at 10 May 2011 14:55 by user perf.

ext3-nobarrier-nocache

Processor: Intel Core i5 650 @ 3.19GHz (4 Cores), Motherboard: LENOVO 5852CB6, Chipset: Intel Core, Memory: 7680MB, Disk: 320GB Western Digital WDC WD3200AAKX-0, Graphics: Intel Core IGP 256MB

OS: SUSE LINUX 11, Kernel: 2.6.32.12-0.7-default (x86_64), Desktop: GNOME 2.28.2, Display Server: X Server 1.6.5, Display Driver: intel 2.10.0, OpenGL: 1.4 (2.1 Mesa 7.7), Compiler: GCC 4.3, File-System: ext3, Screen Resolution: 1680x1050

System Notes: Disk Scheduler: CFQ. Python 2.6. Intel SpeedStep was enabled.

Testing initiated at 11 May 2011 09:00 by user perf.

ext4-barrier-cache

System Notes: Disk Scheduler: CFQ. Python 2.6. Intel SpeedStep was enabled.

Testing initiated at 13 May 2011 12:44 by user perf.

ext4-nobarrier-nocache

Processor: Intel Core i5 650 @ 3.19GHz (4 Cores), Motherboard: LENOVO 5852CB6, Chipset: Intel Core, Memory: 7680MB, Disk: 320GB Western Digital WDC WD3200AAKX-0, Graphics: Intel Core IGP 256MB

OS: SUSE LINUX 11, Kernel: 2.6.32.12-0.7-default (x86_64), Desktop: GNOME 2.28.2, Display Server: X Server 1.6.5, Display Driver: intel 2.10.0, OpenGL: 1.4 (2.1 Mesa 7.7), Compiler: GCC 4.3, File-System: ext2/ext3, Screen Resolution: 1680x1050

System Notes: Disk Scheduler: CFQ. Python 2.6. Intel SpeedStep was enabled.

Testing initiated at 16 May 2011 09:11 by user perf.

btrfs-cow-barrier-cache

System Notes: Disk Scheduler: CFQ. Python 2.6. Intel SpeedStep was enabled.

Testing initiated at 16 May 2011 18:17 by user perf.

btrfs-nocow-nobarrier-nocache

Processor: Intel Core i5 650 @ 3.19GHz (4 Cores), Motherboard: LENOVO 5852CB6, Chipset: Intel Core, Memory: 7680MB, Disk: 320GB Western Digital WDC WD3200AAKX-0, Graphics: Intel Core IGP 256MB

OS: SUSE LINUX 11, Kernel: 2.6.32.12-0.7-default (x86_64), Desktop: GNOME 2.28.2, Display Server: X Server 1.6.5, Display Driver: intel 2.10.0, OpenGL: 1.4 (2.1 Mesa 7.7), Compiler: GCC 4.3, File-System: Btrfs, Screen Resolution: 1680x1050

System Notes: Disk Scheduler: CFQ. Python 2.6. Intel SpeedStep was enabled.

Testing initiated at 17 May 2011 09:13 by user perf.