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


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 |================================================


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  |=======================================


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 |=============================================


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 |=========================================


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 |================================================


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 |===========================================


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  |=====================================


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 |==================================================


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 |===============================================


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 |===========================================