linux-kernel - Re: Linux disk performance.

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Date:	Fri, 22 Dec 2006 11:24:03 +0545
From:	"Manish Regmi" <regmi.manish@...il.com>
To:	"Erik Mouw" <mouw@...linux.org>
Cc:	kernelnewbies@...linux.org, linux-kernel@...r.kernel.org
Subject: Re: Linux disk performance.

On 12/21/06, Erik Mouw <mouw@...linux.org> wrote:
> Bursty video traffic is really an application that could take advantage
> from the kernel buffering. Unless you want to reinvent the wheel and do
> the buffering yourself (it is possible though, I've done it on IRIX).

But in my test O_DIRECT gave a slight better performance. Also the CPU
usage decreased.

>
> BTW, why are you so keen on smooth-at-the-microlevel writeout? With
> real time video applications it's only important not to drop frames.
> How fast those frames will go to the disk isn't really an issue, as
> long as you don't overflow the intermediate buffer.

Actually i dont require  smooth-at-the-microlevel writeout but the
timing bumps are overflowing the intermediate buffers . I was just
wondering if i could decrease the 20ms bumps to 3 ms as in other
writes.

>
> Erik
>
> --
> They're all fools. Don't worry. Darwin may be slow, but he'll
> eventually get them. -- Matthew Lammers in alt.sysadmin.recovery
>


-- 
---------------------------------------------------------------
regards
Manish Regmi

---------------------------------------------------------------
UNIX without a C Compiler is like eating Spaghetti with your mouth
sewn shut. It just doesn't make sense.
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