[RFC] IO scheduler based IO controller V6

Gui Jianfeng guijianfeng at cn.fujitsu.com
Sun Jul 26 19:10:34 PDT 2009


Hi,

Here are some fio test results for IO Controller V6 built and not built.
Iozone test results are also attached.

Arch: X86
Mem:  1G
Disk: 320G
IO Scheduler: CFQ

============
By normal read and write syscall.

Block Size:32K
File Size: 1G * 10

Mode                    Normal read   |   Random read   |   Normal write   |   Random write | Direct read | Direct write

2.6.31-rc1              47,932KiB/s       3,566KiB/s        45,693KiB/s        8,501KiB/s     50,088KiB/s   43,473KiB/s

2.6.31-rc1-Vivek-V6     47,231KiB/s       3,411KiB/s        42,451KiB/s        8,714KiB/s     51,284KiB/s   42,341KiB/s

Performance             -1.5%             -4.4%             -7.0%              +2.5%          +2.4%         -2.6%

============

By mmap.

Block Size:32K
File Size: 500M

Mode                    Normal read   |   Random read   |   Normal write   |   Random write

2.6.31-rc1              49,951KiB/s       3,245KiB/s        21,950KiB/s        2,771KiB/s

2.6.31-rc1-Vivek-V6     49,951KiB/s       3,154KiB/s        22,593KiB/s        2,648KiB/s

Performance             0%                -2.8%             +2.9%              -4.4%

============
 
By libaio calls

Block Size:32K
File Size: 500M

Mode                    Normal read   |  Random read   |   Normal write   |   Random write

2.6.31-rc1              49,447KiB/s       3,296KiB/s        57,519KiB/s        21,093KiB/s

2.6.31-rc1-Vivek-V6     50,142KiB/s       3,238KiB/s        57,791KiB/s        21,283KiB/s

Performance             +1.4%             -1.8%             0%                 +0.1%

============











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