T2 2 x Intel Xeon E5620 testing with a Intel S5520HC and Matrox MGA G200e [Pilot] (SEP1) on Debian 6.0.3 via the Phoronix Test Suite. cfq default: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq MD0 read_ahead 0: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq MD0 read_ahead 128: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq MD0 read_ahead 768: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq MD0 rq_affinity 1: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq MD0 rq_affinity 2: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq quantum 16: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq slice_idle 0: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq slice_idle 64: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 cfq low_latency 50: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 anticipatory default: Processor: 2 x Intel Xeon E5620 @ 2.40GHz (16 Cores), Motherboard: Intel S5520HC, Chipset: Intel 5520 I/O + ICH10R, Memory: 24576MB, Disk: 320GB Western Digital WDC WD3200AAKX-0 + 5 x 1500GB Western Digital WDC WD15EARS-00Z + 1500GB Western Digital WDC WD15EARS-00M + 1500GB Western Digital WDC WD15EARS-22Z, Graphics: Matrox MGA G200e [Pilot] (SEP1), Network: Intel 82575EB Gigabit Connection OS: Debian 6.0.3, Kernel: 2.6.32-5-amd64 (x86_64), Desktop: GNOME 2.30.2, Display Server: X Server 1.7.7, Display Driver: matrox, Compiler: GCC 4.4.5, File-System: ext4 Threaded I/O Tester 0.3.3 Test: Write - Size Per Thread: 1Mb - Thread Count: 8 MB/s > Higher Is Better cfq default ............ 52.34 |=============================================== cfq MD0 read_ahead 0 ... 42.90 |======================================= cfq MD0 read_ahead 128 . 49.96 |============================================= cfq MD0 read_ahead 768 . 35.58 |================================ cfq MD0 rq_affinity 1 .. 31.15 |============================ cfq MD0 rq_affinity 2 .. 28.24 |========================= cfq quantum 16 ......... 39.80 |==================================== cfq slice_idle 0 ....... 31.40 |============================ cfq slice_idle 64 ...... 47.85 |=========================================== cfq low_latency 50 ..... 29.70 |=========================== anticipatory default ... 36.61 |=================================