From: Ben Warren <biggerbadderben@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] Add simple IP/UDP fragmentation support
Date: Mon, 11 Aug 2008 10:40:28 -0700 [thread overview]
Message-ID: <48A0798C.20602@gmail.com> (raw)
In-Reply-To: <1218473412.10489.5.camel@localhost.localdomain>
Josh Boyer wrote:
> From: Frank Haverkamp <haver@vnet.ibm.com>
>
> http://tools.ietf.org/html/rfc2348 describes the TFTP block size option
> which allows larger packtes than the 512 byte default. This reduces the
> number of TFTP ACKs significantly and improves performance.
>
> To get the most benefit out of the tftp block size option the support
> of defragementation of IP/UDP packet is helpful. The current implemenation
> should work even with packets received out of order. To enable the large
> packet size the user should set "tftp_block_size" so a value like 16352.
>
> We experimented with different packet sizes and found that more than those
> 16KiB do not contribute much to the performance anymore. Therefor I limited
> the defragmentation buffer to 16KiB no too waste memory.
>
> Signed-off-by: Frank Haverkamp <haver@vnet.ibm.com>
> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
>
> ---
Thanks. This looks like a good feature. I'll try to digest it tonight.
regards,
Ben
next prev parent reply other threads:[~2008-08-11 17:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-11 16:50 [U-Boot] [PATCH] Add simple IP/UDP fragmentation support Josh Boyer
2008-08-11 17:40 ` Ben Warren [this message]
2008-08-27 7:39 ` Ben Warren
2008-09-03 16:50 ` Frank Haverkamp
2008-10-27 23:06 ` Wolfgang Denk
2008-10-27 23:27 ` Ben Warren
2008-10-17 5:58 ` Ben Warren
2008-10-28 6:25 ` Ben Warren
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