SD / Filesystem write lags -- test?

[James Cameron]

On Thu, Jul 01, 2010 at 02:41:56PM -0400, Martin Langhoff wrote:
> In some un-related bug triaging, found this:
> 
> Quozl dixit:
> 
>      performance measurements by Mitch
>      show writes to SD are faster if they are
>      multiples of 16 KiB
> 
> source
> 
>    http://dev.laptop.org/ticket/9995

Yes, that's what Richard was referring to earlier in this thread.  It is
an opportunity that will, if taken, increase the write performance of
the kernel.

My measurements of XO-1 write performance were invalid also because I
was writing zeros, which were easily compressed by jffs2.  The XO-1.5
filesystem is not compressed.

-- 
James Cameron
http://quozl.linux.org.au/