Re: [PATCHSET 1][PATCH 0/6] Filesystem AIO read/write

[Ingo Molnar]

* Suparna Bhattacharya <suparna@xxxxxxxxxx> wrote:

> The following is a sampling of comparative aio-stress results with the 
> patches (each run starts with uncached files):
> 
> ---------------------------------------------
> 				
> aio-stress throughput comparisons (in MB/s):
> 
> file size 1GB, record size 64KB, depth 64, ios per iteration 8
> max io_submit 8, buffer alignment set to 4KB
> 4 way Pentium III SMP box, Adaptec AIC-7896/7 Ultra2 SCSI, 40 MB/s
> Filesystem: ext2
> 
> ----------------------------------------------------------------------------
> 			Buffered (non O_DIRECT)
> 			Vanilla		Patched		O_DIRECT
> ----------------------------------------------------------------------------
> 						       Vanilla Patched
> Random-Read		10.08		23.91		18.91,   18.98
> Random-O_SYNC-Write	 8.86		15.84		16.51,   16.53
> Sequential-Read		31.49		33.00		31.86,   31.79
> Sequential-O_SYNC-Write  8.68		32.60		31.45,   32.44
> Random-Write		31.09 (19.65)	30.90 (19.65)	
> Sequential-Write	30.84 (28.94)	30.09 (28.39)

the numbers look very convincing to me!

	Ingo
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