sony-vaio-z-series team mailing list archive

[Simon Brown <lists@xxxxxxxx>]

At Thu, 2 Dec 2010 17:43:36 +0100,
Joël Bourquard wrote:
> First some numbers. Here's the holy grail of Linux VAIO Z performance:
> 
> === Before ===
> 
> ~ # hdparm -tT /dev/mapper/isw_xxxxxxxxx_Volume0
> 
> /dev/mapper/isw_xxxxxxxxx_Volume0:
>  Timing cached reads:   9266 MB in  2.00 seconds = 4635.03 MB/sec
>  Timing buffered disk reads:  638 MB in  3.00 seconds = 212.46 MB/sec
> 
> === After ===
> 
> ~ # hdparm -tT /dev/md0
> 
> /dev/md0:
>  Timing cached reads:   9172 MB in  2.00 seconds = 4587.73 MB/sec
>  Timing buffered disk reads:  1514 MB in  3.00 seconds = 504.33 MB/sec

So cached reads are slightly slower and buffered reads are twice as
fast. Benchmarks aside have you noticed any everyday difference?

Simon