kvm disk test
AMD Phenom II X4 B45 testing with a Bochs and Cirrus Logic GD 5446 on Fedora 16 (Verne) via the Phoronix Test Suite.


cache=none: 

	Processor: AMD Phenom II X4 B45 @ 3.10GHz (4 Cores), Motherboard: Bochs, Chipset: Intel 440FX- 82441FX PMC, Memory: 2048MB, Disk: 32GB QEMU HDD, Graphics: LLVMpipe, Network: Realtek RTL-8139/8139C/8139C+

	OS: Fedora 16 (Verne), Kernel: 3.1.0-7.fc16.i686 (i686), Desktop: KDE 4.7.2, Display Server: X Server 1.11.1, Display Driver: cirrus 1.3.2, OpenGL: 2.1 Mesa 7.11.2 Gallium 0.4, Compiler: GCC 4.6.3 20120306, File-System: ext4, Screen Resolution: 1024x768

cache=none,if=virtio: 

	Processor: AMD Phenom II X4 B45 @ 3.10GHz (4 Cores), Motherboard: Bochs, Chipset: Intel 440FX- 82441FX PMC, Memory: 2048MB, Disk: 28GB, Graphics: LLVMpipe, Network: Realtek RTL-8139/8139C/8139C+

	OS: Fedora 16 (Verne), Kernel: 3.1.0-7.fc16.i686 (i686), Desktop: KDE 4.7.2, Display Server: X Server 1.11.1, Display Driver: cirrus 1.3.2, OpenGL: 2.1 Mesa 7.11.2 Gallium 0.4, Compiler: GCC 4.6.3 20120306, File-System: ext4, Screen Resolution: 1024x768

cache=writeback: 

	Processor: AMD Phenom II X4 B45 @ 3.10GHz (4 Cores), Motherboard: Bochs, Chipset: Intel 440FX- 82441FX PMC, Memory: 2048MB, Disk: 32GB QEMU HDD, Graphics: LLVMpipe, Network: Realtek RTL-8139/8139C/8139C+

	OS: Fedora 16 (Verne), Kernel: 3.1.0-7.fc16.i686 (i686), Desktop: KDE 4.7.2, Display Server: X Server 1.11.1, Display Driver: cirrus 1.3.2, OpenGL: 2.1 Mesa 7.11.2 Gallium 0.4, Compiler: GCC 4.6.3 20120306, File-System: ext4, Screen Resolution: 1024x768

cache=writeback,if=virtio: 

	Processor: AMD Phenom II X4 B45 @ 3.10GHz (4 Cores), Motherboard: Bochs, Chipset: Intel 440FX- 82441FX PMC, Memory: 2048MB, Disk: 28GB, Graphics: LLVMpipe, Network: Realtek RTL-8139/8139C/8139C+

	OS: Fedora 16 (Verne), Kernel: 3.1.0-7.fc16.i686 (i686), Desktop: KDE 4.7.2, Display Server: X Server 1.11.1, Display Driver: cirrus 1.3.2, OpenGL: 2.1 Mesa 7.11.2 Gallium 0.4, Compiler: GCC 4.6.3 20120306, File-System: ext4, Screen Resolution: 1024x768


IOzone 3.347
Record Size: 4Kb - File Size: 512MB - Disk Test: Write Performance
MB/s > Higher Is Better
cache=none ................ 144.71 |=======================
cache=none,if=virtio ...... 118.71 |===================
cache=writeback ........... 265.88 |===========================================
cache=writeback,if=virtio . 125.97 |====================


IOzone 3.347
Record Size: 4Kb - File Size: 512MB - Disk Test: Read Performance
MB/s > Higher Is Better
cache=none ................ 1162.93 |==========================================
cache=none,if=virtio ...... 956.43  |===================================
cache=writeback ........... 967.89  |===================================
cache=writeback,if=virtio . 957.03  |===================================


IOzone 3.347
Record Size: 64Kb - File Size: 512MB - Disk Test: Write Performance
MB/s > Higher Is Better
cache=none ................ 149.41 |=============
cache=none,if=virtio ...... 138.19 |============
cache=writeback ........... 138.53 |============
cache=writeback,if=virtio . 481.47 |===========================================


IOzone 3.347
Record Size: 64Kb - File Size: 512MB - Disk Test: Read Performance
MB/s > Higher Is Better
cache=none ................ 2115.72 |==========================================
cache=none,if=virtio ...... 1779.04 |===================================
cache=writeback ........... 1823.32 |====================================
cache=writeback,if=virtio . 1810.91 |====================================


IOzone 3.347
Record Size: 1MB - File Size: 512MB - Disk Test: Write Performance
MB/s > Higher Is Better
cache=none ................ 155.42 |================
cache=none,if=virtio ...... 142.70 |===============
cache=writeback ........... 411.19 |===========================================
cache=writeback,if=virtio . 408.67 |===========================================


IOzone 3.347
Record Size: 1MB - File Size: 512MB - Disk Test: Read Performance
MB/s > Higher Is Better
cache=none ................ 1442.08 |==========================================
cache=none,if=virtio ...... 1330.70 |=======================================
cache=writeback ........... 1318.78 |======================================
cache=writeback,if=virtio . 1335.56 |=======================================


Threaded I/O Tester 0.3.3
Test: Write - Size Per Thread: 256MB - Thread Count: 4
MB/s > Higher Is Better
cache=none ................ 99.78  |==========================================
cache=none,if=virtio ...... 101.19 |===========================================
cache=writeback ........... 77.33  |=================================
cache=writeback,if=virtio . 83.31  |===================================


Threaded I/O Tester 0.3.3
Test: Random Write - Size Per Thread: 256MB - Thread Count: 4
MB/s > Higher Is Better
cache=none ................ 1.55 |================================
cache=none,if=virtio ...... 1.56 |================================
cache=writeback ........... 2.17 |=============================================
cache=writeback,if=virtio . 1.54 |================================


Threaded I/O Tester 0.3.3
Test: Read - Size Per Thread: 256MB - Thread Count: 4
MB/s > Higher Is Better
cache=none ................ 119.47  |=
cache=none,if=virtio ...... 3674.57 |==========================================
cache=writeback ........... 3685.84 |==========================================
cache=writeback,if=virtio . 2427.63 |============================


Threaded I/O Tester 0.3.3
Test: Random Read - Size Per Thread: 256MB - Thread Count: 4
MB/s > Higher Is Better
cache=none ................ 10.12   |
cache=none,if=virtio ...... 2743.64 |==========================================
cache=writeback ........... 2510.44 |======================================
cache=writeback,if=virtio . 2252.42 |==================================